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IOMMU Updates for Linux v5.6

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Including:
 
 	- Allow to compile the ARM-SMMU drivers as modules.
 
 	- Fixes and cleanups for the ARM-SMMU drivers and io-pgtable code
 	  collected by Will Deacon. The merge-commit (6855d1ba75) has all the
 	  details.
 
 	- Cleanup of the iommu_put_resv_regions() call-backs in various drivers.
 
 	- AMD IOMMU driver cleanups.
 
 	- Update for the x2APIC support in the AMD IOMMU driver.
 
 	- Preparation patches for Intel VT-d nested mode support.
 
 	- RMRR and identity domain handling fixes for the Intel VT-d driver.
 
 	- More small fixes and cleanups.
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Merge tag 'iommu-updates-v5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull iommu updates from Joerg Roedel:

 - Allow compiling the ARM-SMMU drivers as modules.

 - Fixes and cleanups for the ARM-SMMU drivers and io-pgtable code
   collected by Will Deacon. The merge-commit (6855d1ba75) has all the
   details.

 - Cleanup of the iommu_put_resv_regions() call-backs in various
   drivers.

 - AMD IOMMU driver cleanups.

 - Update for the x2APIC support in the AMD IOMMU driver.

 - Preparation patches for Intel VT-d nested mode support.

 - RMRR and identity domain handling fixes for the Intel VT-d driver.

 - More small fixes and cleanups.

* tag 'iommu-updates-v5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (87 commits)
  iommu/amd: Remove the unnecessary assignment
  iommu/vt-d: Remove unnecessary WARN_ON_ONCE()
  iommu/vt-d: Unnecessary to handle default identity domain
  iommu/vt-d: Allow devices with RMRRs to use identity domain
  iommu/vt-d: Add RMRR base and end addresses sanity check
  iommu/vt-d: Mark firmware tainted if RMRR fails sanity check
  iommu/amd: Remove unused struct member
  iommu/amd: Replace two consecutive readl calls with one readq
  iommu/vt-d: Don't reject Host Bridge due to scope mismatch
  PCI/ATS: Add PASID stubs
  iommu/arm-smmu-v3: Return -EBUSY when trying to re-add a device
  iommu/arm-smmu-v3: Improve add_device() error handling
  iommu/arm-smmu-v3: Use WRITE_ONCE() when changing validity of an STE
  iommu/arm-smmu-v3: Add second level of context descriptor table
  iommu/arm-smmu-v3: Prepare for handling arm_smmu_write_ctx_desc() failure
  iommu/arm-smmu-v3: Propagate ssid_bits
  iommu/arm-smmu-v3: Add support for Substream IDs
  iommu/arm-smmu-v3: Add context descriptor tables allocators
  iommu/arm-smmu-v3: Prepare arm_smmu_s1_cfg for SSID support
  ACPI/IORT: Parse SSID property of named component node
  ...
This commit is contained in:
Linus Torvalds 2020-02-05 17:49:54 +00:00
commit 4fc2ea6a86
36 changed files with 1685 additions and 821 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
Documentation/devicetree/bindings/iommu/iommu.txt
View File

@ -86,6 +86,12 @@ have a means to turn off translation. But it is invalid in such cases to
disable the IOMMU's device tree node in the first place because it would
prevent any driver from properly setting up the translations.
Optional properties:
--------------------
- pasid-num-bits: Some masters support multiple address spaces for DMA, by
tagging DMA transactions with an address space identifier. By default,
this is 0, which means that the device only has one address space.
Notes:
======

22
drivers/acpi/arm64/iort.c
View File

@ -11,6 +11,7 @@
#define pr_fmt(fmt) "ACPI: IORT: " fmt
#include <linux/acpi_iort.h>
#include <linux/bitfield.h>
#include <linux/iommu.h>
#include <linux/kernel.h>
#include <linux/list.h>
@ -902,9 +903,9 @@ static inline bool iort_iommu_driver_enabled(u8 type)
{
switch (type) {
case ACPI_IORT_NODE_SMMU_V3:
return IS_BUILTIN(CONFIG_ARM_SMMU_V3);
return IS_ENABLED(CONFIG_ARM_SMMU_V3);
case ACPI_IORT_NODE_SMMU:
return IS_BUILTIN(CONFIG_ARM_SMMU);
return IS_ENABLED(CONFIG_ARM_SMMU);
default:
pr_warn("IORT node type %u does not describe an SMMU\n", type);
return false;
@ -976,6 +977,20 @@ static int iort_pci_iommu_init(struct pci_dev *pdev, u16 alias, void *data)
return iort_iommu_xlate(info->dev, parent, streamid);
}
static void iort_named_component_init(struct device *dev,
struct acpi_iort_node *node)
{
struct acpi_iort_named_component *nc;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
if (!fwspec)
return;
nc = (struct acpi_iort_named_component *)node->node_data;
fwspec->num_pasid_bits = FIELD_GET(ACPI_IORT_NC_PASID_BITS,
nc->node_flags);
}
/**
* iort_iommu_configure - Set-up IOMMU configuration for a device.
*
@ -1030,6 +1045,9 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev)
if (parent)
err = iort_iommu_xlate(dev, parent, streamid);
} while (parent && !err);
if (!err)
iort_named_component_init(dev, node);
}
/*

35
drivers/iommu/Kconfig
View File

@ -82,7 +82,7 @@ config IOMMU_DEBUGFS
config IOMMU_DEFAULT_PASSTHROUGH
bool "IOMMU passthrough by default"
depends on IOMMU_API
help
help
Enable passthrough by default, removing the need to pass in
iommu.passthrough=on or iommu=pt through command line. If this
is enabled, you can still disable with iommu.passthrough=off
@ -91,8 +91,8 @@ config IOMMU_DEFAULT_PASSTHROUGH
If unsure, say N here.
config OF_IOMMU
def_bool y
depends on OF && IOMMU_API
def_bool y
depends on OF && IOMMU_API
# IOMMU-agnostic DMA-mapping layer
config IOMMU_DMA
@ -214,6 +214,7 @@ config INTEL_IOMMU_SVM
select PCI_PASID
select PCI_PRI
select MMU_NOTIFIER
select IOASID
help
Shared Virtual Memory (SVM) provides a facility for devices
to access DMA resources through process address space by
@ -248,6 +249,18 @@ config INTEL_IOMMU_FLOPPY_WA
workaround will setup a 1:1 mapping for the first
16MiB to make floppy (an ISA device) work.
config INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON
bool "Enable Intel IOMMU scalable mode by default"
depends on INTEL_IOMMU
help
Selecting this option will enable by default the scalable mode if
hardware presents the capability. The scalable mode is defined in
VT-d 3.0. The scalable mode capability could be checked by reading
/sys/devices/virtual/iommu/dmar*/intel-iommu/ecap. If this option
is not selected, scalable mode support could also be enabled by
passing intel_iommu=sm_on to the kernel. If not sure, please use
the default value.
config IRQ_REMAP
bool "Support for Interrupt Remapping"
depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI
@ -356,7 +369,7 @@ config SPAPR_TCE_IOMMU
# ARM IOMMU support
config ARM_SMMU
bool "ARM Ltd. System MMU (SMMU) Support"
tristate "ARM Ltd. System MMU (SMMU) Support"
depends on (ARM64 || ARM) && MMU
select IOMMU_API
select IOMMU_IO_PGTABLE_LPAE
@ -368,6 +381,18 @@ config ARM_SMMU
Say Y here if your SoC includes an IOMMU device implementing
the ARM SMMU architecture.
config ARM_SMMU_LEGACY_DT_BINDINGS
bool "Support the legacy \"mmu-masters\" devicetree bindings"
depends on ARM_SMMU=y && OF
help
Support for the badly designed and deprecated "mmu-masters"
devicetree bindings. This allows some DMA masters to attach
to the SMMU but does not provide any support via the DMA API.
If you're lucky, you might be able to get VFIO up and running.
If you say Y here then you'll make me very sad. Instead, say N
and move your firmware to the utopian future that was 2016.
config ARM_SMMU_DISABLE_BYPASS_BY_DEFAULT
bool "Default to disabling bypass on ARM SMMU v1 and v2"
depends on ARM_SMMU
@ -394,7 +419,7 @@ config ARM_SMMU_DISABLE_BYPASS_BY_DEFAULT
config.
config ARM_SMMU_V3
bool "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
tristate "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
depends on ARM64
select IOMMU_API
select IOMMU_IO_PGTABLE_LPAE

3
drivers/iommu/Makefile
View File

@ -14,7 +14,8 @@ obj-$(CONFIG_MSM_IOMMU) += msm_iommu.o
obj-$(CONFIG_AMD_IOMMU) += amd_iommu.o amd_iommu_init.o amd_iommu_quirks.o
obj-$(CONFIG_AMD_IOMMU_DEBUGFS) += amd_iommu_debugfs.o
obj-$(CONFIG_AMD_IOMMU_V2) += amd_iommu_v2.o
obj-$(CONFIG_ARM_SMMU) += arm-smmu.o arm-smmu-impl.o arm-smmu-qcom.o
obj-$(CONFIG_ARM_SMMU) += arm-smmu-mod.o
arm-smmu-mod-objs += arm-smmu.o arm-smmu-impl.o arm-smmu-qcom.o
obj-$(CONFIG_ARM_SMMU_V3) += arm-smmu-v3.o
obj-$(CONFIG_DMAR_TABLE) += dmar.o
obj-$(CONFIG_INTEL_IOMMU) += intel-iommu.o intel-pasid.o

12
drivers/iommu/amd_iommu.c
View File

@ -2294,7 +2294,6 @@ int __init amd_iommu_init_api(void)
int __init amd_iommu_init_dma_ops(void)
{
swiotlb = (iommu_default_passthrough() || sme_me_mask) ? 1 : 0;
iommu_detected = 1;
if (amd_iommu_unmap_flush)
pr_info("IO/TLB flush on unmap enabled\n");
@ -2638,15 +2637,6 @@ static void amd_iommu_get_resv_regions(struct device *dev,
list_add_tail(&region->list, head);
}
static void amd_iommu_put_resv_regions(struct device *dev,
struct list_head *head)
{
struct iommu_resv_region *entry, *next;
list_for_each_entry_safe(entry, next, head, list)
kfree(entry);
}
static bool amd_iommu_is_attach_deferred(struct iommu_domain *domain,
struct device *dev)
{
@ -2685,7 +2675,7 @@ const struct iommu_ops amd_iommu_ops = {
.device_group = amd_iommu_device_group,
.domain_get_attr = amd_iommu_domain_get_attr,
.get_resv_regions = amd_iommu_get_resv_regions,
.put_resv_regions = amd_iommu_put_resv_regions,
.put_resv_regions = generic_iommu_put_resv_regions,
.is_attach_deferred = amd_iommu_is_attach_deferred,
.pgsize_bitmap = AMD_IOMMU_PGSIZES,
.flush_iotlb_all = amd_iommu_flush_iotlb_all,

55
drivers/iommu/amd_iommu_init.c
View File

@ -71,6 +71,8 @@
#define IVHD_FLAG_ISOC_EN_MASK 0x08
#define IVMD_FLAG_EXCL_RANGE 0x08
#define IVMD_FLAG_IW 0x04
#define IVMD_FLAG_IR 0x02
#define IVMD_FLAG_UNITY_MAP 0x01
#define ACPI_DEVFLAG_INITPASS 0x01
@ -147,7 +149,7 @@ bool amd_iommu_dump;
bool amd_iommu_irq_remap __read_mostly;
int amd_iommu_guest_ir = AMD_IOMMU_GUEST_IR_VAPIC;
static int amd_iommu_xt_mode = IRQ_REMAP_X2APIC_MODE;
static int amd_iommu_xt_mode = IRQ_REMAP_XAPIC_MODE;
static bool amd_iommu_detected;
static bool __initdata amd_iommu_disabled;
@ -714,7 +716,7 @@ static void iommu_enable_ppr_log(struct amd_iommu *iommu)
writel(0x00, iommu->mmio_base + MMIO_PPR_HEAD_OFFSET);
writel(0x00, iommu->mmio_base + MMIO_PPR_TAIL_OFFSET);
iommu_feature_enable(iommu, CONTROL_PPFLOG_EN);
iommu_feature_enable(iommu, CONTROL_PPRLOG_EN);
iommu_feature_enable(iommu, CONTROL_PPR_EN);
}
@ -1116,21 +1118,17 @@ static int __init add_early_maps(void)
*/
static void __init set_device_exclusion_range(u16 devid, struct ivmd_header *m)
{
struct amd_iommu *iommu = amd_iommu_rlookup_table[devid];
if (!(m->flags & IVMD_FLAG_EXCL_RANGE))
return;
if (iommu) {
/*
* We only can configure exclusion ranges per IOMMU, not
* per device. But we can enable the exclusion range per
* device. This is done here
*/
set_dev_entry_bit(devid, DEV_ENTRY_EX);
iommu->exclusion_start = m->range_start;
iommu->exclusion_length = m->range_length;
}
/*
* Treat per-device exclusion ranges as r/w unity-mapped regions
* since some buggy BIOSes might lead to the overwritten exclusion
* range (exclusion_start and exclusion_length members). This
* happens when there are multiple exclusion ranges (IVMD entries)
* defined in ACPI table.
*/
m->flags = (IVMD_FLAG_IW | IVMD_FLAG_IR | IVMD_FLAG_UNITY_MAP);
}
/*
@ -1523,8 +1521,6 @@ static int __init init_iommu_one(struct amd_iommu *iommu, struct ivhd_header *h)
iommu->mmio_phys_end = MMIO_CNTR_CONF_OFFSET;
if (((h->efr_attr & (0x1 << IOMMU_FEAT_GASUP_SHIFT)) == 0))
amd_iommu_guest_ir = AMD_IOMMU_GUEST_IR_LEGACY;
if (((h->efr_attr & (0x1 << IOMMU_FEAT_XTSUP_SHIFT)) == 0))
amd_iommu_xt_mode = IRQ_REMAP_XAPIC_MODE;
break;
case 0x11:
case 0x40:
@ -1534,8 +1530,15 @@ static int __init init_iommu_one(struct amd_iommu *iommu, struct ivhd_header *h)
iommu->mmio_phys_end = MMIO_CNTR_CONF_OFFSET;
if (((h->efr_reg & (0x1 << IOMMU_EFR_GASUP_SHIFT)) == 0))
amd_iommu_guest_ir = AMD_IOMMU_GUEST_IR_LEGACY;
if (((h->efr_reg & (0x1 << IOMMU_EFR_XTSUP_SHIFT)) == 0))
amd_iommu_xt_mode = IRQ_REMAP_XAPIC_MODE;
/*
* Note: Since iommu_update_intcapxt() leverages
* the IOMMU MMIO access to MSI capability block registers
* for MSI address lo/hi/data, we need to check both
* EFR[XtSup] and EFR[MsiCapMmioSup] for x2APIC support.
*/
if ((h->efr_reg & BIT(IOMMU_EFR_XTSUP_SHIFT)) &&
(h->efr_reg & BIT(IOMMU_EFR_MSICAPMMIOSUP_SHIFT)))
amd_iommu_xt_mode = IRQ_REMAP_X2APIC_MODE;
break;
default:
return -EINVAL;
@ -1727,7 +1730,6 @@ static const struct attribute_group *amd_iommu_groups[] = {
static int __init iommu_init_pci(struct amd_iommu *iommu)
{
int cap_ptr = iommu->cap_ptr;
u32 range, misc, low, high;
int ret;
iommu->dev = pci_get_domain_bus_and_slot(0, PCI_BUS_NUM(iommu->devid),
@ -1740,19 +1742,12 @@ static int __init iommu_init_pci(struct amd_iommu *iommu)
pci_read_config_dword(iommu->dev, cap_ptr + MMIO_CAP_HDR_OFFSET,
&iommu->cap);
pci_read_config_dword(iommu->dev, cap_ptr + MMIO_RANGE_OFFSET,
&range);
pci_read_config_dword(iommu->dev, cap_ptr + MMIO_MISC_OFFSET,
&misc);
if (!(iommu->cap & (1 << IOMMU_CAP_IOTLB)))
amd_iommu_iotlb_sup = false;
/* read extended feature bits */
low = readl(iommu->mmio_base + MMIO_EXT_FEATURES);
high = readl(iommu->mmio_base + MMIO_EXT_FEATURES + 4);
iommu->features = ((u64)high << 32) | low;
iommu->features = readq(iommu->mmio_base + MMIO_EXT_FEATURES);
if (iommu_feature(iommu, FEATURE_GT)) {
int glxval;
@ -1996,8 +1991,8 @@ static int iommu_init_intcapxt(struct amd_iommu *iommu)
struct irq_affinity_notify *notify = &iommu->intcapxt_notify;
/**
* IntCapXT requires XTSup=1, which can be inferred
* amd_iommu_xt_mode.
* IntCapXT requires XTSup=1 and MsiCapMmioSup=1,
* which can be inferred from amd_iommu_xt_mode.
*/
if (amd_iommu_xt_mode != IRQ_REMAP_X2APIC_MODE)
return 0;
@ -2044,7 +2039,7 @@ enable_faults:
iommu_feature_enable(iommu, CONTROL_EVT_INT_EN);
if (iommu->ppr_log != NULL)
iommu_feature_enable(iommu, CONTROL_PPFINT_EN);
iommu_feature_enable(iommu, CONTROL_PPRINT_EN);
iommu_ga_log_enable(iommu);

7
drivers/iommu/amd_iommu_types.h
View File

@ -147,8 +147,8 @@
#define CONTROL_COHERENT_EN 0x0aULL
#define CONTROL_ISOC_EN 0x0bULL
#define CONTROL_CMDBUF_EN 0x0cULL
#define CONTROL_PPFLOG_EN 0x0dULL
#define CONTROL_PPFINT_EN 0x0eULL
#define CONTROL_PPRLOG_EN 0x0dULL
#define CONTROL_PPRINT_EN 0x0eULL
#define CONTROL_PPR_EN 0x0fULL
#define CONTROL_GT_EN 0x10ULL
#define CONTROL_GA_EN 0x11ULL
@ -377,12 +377,12 @@
#define IOMMU_CAP_EFR 27
/* IOMMU Feature Reporting Field (for IVHD type 10h */
#define IOMMU_FEAT_XTSUP_SHIFT 0
#define IOMMU_FEAT_GASUP_SHIFT 6
/* IOMMU Extended Feature Register (EFR) */
#define IOMMU_EFR_XTSUP_SHIFT 2
#define IOMMU_EFR_GASUP_SHIFT 7
#define IOMMU_EFR_MSICAPMMIOSUP_SHIFT 46
#define MAX_DOMAIN_ID 65536
@ -463,7 +463,6 @@ struct amd_irte_ops;
* independent of their use.
*/
struct protection_domain {
struct list_head list; /* for list of all protection domains */
struct list_head dev_list; /* List of all devices in this domain */
struct iommu_domain domain; /* generic domain handle used by
iommu core code */

2
drivers/iommu/arm-smmu-impl.c
View File

@ -119,7 +119,7 @@ int arm_mmu500_reset(struct arm_smmu_device *smmu)
* Secure has also cleared SACR.CACHE_LOCK for this to take effect...
*/
reg = arm_smmu_gr0_read(smmu, ARM_SMMU_GR0_ID7);
major = FIELD_GET(ID7_MAJOR, reg);
major = FIELD_GET(ARM_SMMU_ID7_MAJOR, reg);
reg = arm_smmu_gr0_read(smmu, ARM_SMMU_GR0_sACR);
if (major >= 2)
reg &= ~ARM_MMU500_ACR_CACHE_LOCK;

604
drivers/iommu/arm-smmu-v3.c
View File

@ -21,8 +21,7 @@
#include <linux/io-pgtable.h>
#include <linux/iommu.h>
#include <linux/iopoll.h>
#include <linux/init.h>
#include <linux/moduleparam.h>
#include <linux/module.h>
#include <linux/msi.h>
#include <linux/of.h>
#include <linux/of_address.h>
@ -224,9 +223,15 @@
#define STRTAB_STE_0_S1FMT GENMASK_ULL(5, 4)
#define STRTAB_STE_0_S1FMT_LINEAR 0
#define STRTAB_STE_0_S1FMT_64K_L2 2
#define STRTAB_STE_0_S1CTXPTR_MASK GENMASK_ULL(51, 6)
#define STRTAB_STE_0_S1CDMAX GENMASK_ULL(63, 59)
#define STRTAB_STE_1_S1DSS GENMASK_ULL(1, 0)
#define STRTAB_STE_1_S1DSS_TERMINATE 0x0
#define STRTAB_STE_1_S1DSS_BYPASS 0x1
#define STRTAB_STE_1_S1DSS_SSID0 0x2
#define STRTAB_STE_1_S1C_CACHE_NC 0UL
#define STRTAB_STE_1_S1C_CACHE_WBRA 1UL
#define STRTAB_STE_1_S1C_CACHE_WT 2UL
@ -251,6 +256,13 @@
#define STRTAB_STE_2_S2VMID GENMASK_ULL(15, 0)
#define STRTAB_STE_2_VTCR GENMASK_ULL(50, 32)
#define STRTAB_STE_2_VTCR_S2T0SZ GENMASK_ULL(5, 0)
#define STRTAB_STE_2_VTCR_S2SL0 GENMASK_ULL(7, 6)
#define STRTAB_STE_2_VTCR_S2IR0 GENMASK_ULL(9, 8)
#define STRTAB_STE_2_VTCR_S2OR0 GENMASK_ULL(11, 10)
#define STRTAB_STE_2_VTCR_S2SH0 GENMASK_ULL(13, 12)
#define STRTAB_STE_2_VTCR_S2TG GENMASK_ULL(15, 14)
#define STRTAB_STE_2_VTCR_S2PS GENMASK_ULL(18, 16)
#define STRTAB_STE_2_S2AA64 (1UL << 51)
#define STRTAB_STE_2_S2ENDI (1UL << 52)
#define STRTAB_STE_2_S2PTW (1UL << 54)
@ -258,30 +270,34 @@
#define STRTAB_STE_3_S2TTB_MASK GENMASK_ULL(51, 4)
/* Context descriptor (stage-1 only) */
/*
* Context descriptors.
*
* Linear: when less than 1024 SSIDs are supported
* 2lvl: at most 1024 L1 entries,
* 1024 lazy entries per table.
*/
#define CTXDESC_SPLIT 10
#define CTXDESC_L2_ENTRIES (1 << CTXDESC_SPLIT)
#define CTXDESC_L1_DESC_DWORDS 1
#define CTXDESC_L1_DESC_V (1UL << 0)
#define CTXDESC_L1_DESC_L2PTR_MASK GENMASK_ULL(51, 12)
#define CTXDESC_CD_DWORDS 8
#define CTXDESC_CD_0_TCR_T0SZ GENMASK_ULL(5, 0)
#define ARM64_TCR_T0SZ GENMASK_ULL(5, 0)
#define CTXDESC_CD_0_TCR_TG0 GENMASK_ULL(7, 6)
#define ARM64_TCR_TG0 GENMASK_ULL(15, 14)
#define CTXDESC_CD_0_TCR_IRGN0 GENMASK_ULL(9, 8)
#define ARM64_TCR_IRGN0 GENMASK_ULL(9, 8)
#define CTXDESC_CD_0_TCR_ORGN0 GENMASK_ULL(11, 10)
#define ARM64_TCR_ORGN0 GENMASK_ULL(11, 10)
#define CTXDESC_CD_0_TCR_SH0 GENMASK_ULL(13, 12)
#define ARM64_TCR_SH0 GENMASK_ULL(13, 12)
#define CTXDESC_CD_0_TCR_EPD0 (1ULL << 14)
#define ARM64_TCR_EPD0 (1ULL << 7)
#define CTXDESC_CD_0_TCR_EPD1 (1ULL << 30)
#define ARM64_TCR_EPD1 (1ULL << 23)
#define CTXDESC_CD_0_ENDI (1UL << 15)
#define CTXDESC_CD_0_V (1UL << 31)
#define CTXDESC_CD_0_TCR_IPS GENMASK_ULL(34, 32)
#define ARM64_TCR_IPS GENMASK_ULL(34, 32)
#define CTXDESC_CD_0_TCR_TBI0 (1ULL << 38)
#define ARM64_TCR_TBI0 (1ULL << 37)
#define CTXDESC_CD_0_AA64 (1UL << 41)
#define CTXDESC_CD_0_S (1UL << 44)
@ -292,9 +308,11 @@
#define CTXDESC_CD_1_TTB0_MASK GENMASK_ULL(51, 4)
/* Convert between AArch64 (CPU) TCR format and SMMU CD format */
#define ARM_SMMU_TCR2CD(tcr, fld) FIELD_PREP(CTXDESC_CD_0_TCR_##fld, \
FIELD_GET(ARM64_TCR_##fld, tcr))
/*
* When the SMMU only supports linear context descriptor tables, pick a
* reasonable size limit (64kB).
*/
#define CTXDESC_LINEAR_CDMAX ilog2(SZ_64K / (CTXDESC_CD_DWORDS << 3))
/* Command queue */
#define CMDQ_ENT_SZ_SHIFT 4
@ -323,6 +341,7 @@
#define CMDQ_PREFETCH_1_SIZE GENMASK_ULL(4, 0)
#define CMDQ_PREFETCH_1_ADDR_MASK GENMASK_ULL(63, 12)
#define CMDQ_CFGI_0_SSID GENMASK_ULL(31, 12)
#define CMDQ_CFGI_0_SID GENMASK_ULL(63, 32)
#define CMDQ_CFGI_1_LEAF (1UL << 0)
#define CMDQ_CFGI_1_RANGE GENMASK_ULL(4, 0)
@ -384,10 +403,6 @@
#define MSI_IOVA_BASE 0x8000000
#define MSI_IOVA_LENGTH 0x100000
/*
* not really modular, but the easiest way to keep compat with existing
* bootargs behaviour is to continue using module_param_named here.
*/
static bool disable_bypass = 1;
module_param_named(disable_bypass, disable_bypass, bool, S_IRUGO);
MODULE_PARM_DESC(disable_bypass,
@ -440,8 +455,11 @@ struct arm_smmu_cmdq_ent {
#define CMDQ_OP_CFGI_STE 0x3
#define CMDQ_OP_CFGI_ALL 0x4
#define CMDQ_OP_CFGI_CD 0x5
#define CMDQ_OP_CFGI_CD_ALL 0x6
struct {
u32 sid;
u32 ssid;
union {
bool leaf;
u8 span;
@ -547,16 +565,30 @@ struct arm_smmu_strtab_l1_desc {
dma_addr_t l2ptr_dma;
};
struct arm_smmu_s1_cfg {
__le64 *cdptr;
dma_addr_t cdptr_dma;
struct arm_smmu_ctx_desc {
u16 asid;
u64 ttbr;
u64 tcr;
u64 mair;
};
struct arm_smmu_ctx_desc {
u16 asid;
u64 ttbr;
u64 tcr;
u64 mair;
} cd;
struct arm_smmu_l1_ctx_desc {
__le64 *l2ptr;
dma_addr_t l2ptr_dma;
};
struct arm_smmu_ctx_desc_cfg {
__le64 *cdtab;
dma_addr_t cdtab_dma;
struct arm_smmu_l1_ctx_desc *l1_desc;
unsigned int num_l1_ents;
};
struct arm_smmu_s1_cfg {
struct arm_smmu_ctx_desc_cfg cdcfg;
struct arm_smmu_ctx_desc cd;
u8 s1fmt;
u8 s1cdmax;
};
struct arm_smmu_s2_cfg {
@ -638,6 +670,7 @@ struct arm_smmu_master {
u32 *sids;
unsigned int num_sids;
bool ats_enabled;
unsigned int ssid_bits;
};
/* SMMU private data for an IOMMU domain */
@ -847,15 +880,22 @@ static int arm_smmu_cmdq_build_cmd(u64 *cmd, struct arm_smmu_cmdq_ent *ent)
cmd[1] |= FIELD_PREP(CMDQ_PREFETCH_1_SIZE, ent->prefetch.size);
cmd[1] |= ent->prefetch.addr & CMDQ_PREFETCH_1_ADDR_MASK;
break;
case CMDQ_OP_CFGI_CD:
cmd[0] |= FIELD_PREP(CMDQ_CFGI_0_SSID, ent->cfgi.ssid);
/* Fallthrough */
case CMDQ_OP_CFGI_STE:
cmd[0] |= FIELD_PREP(CMDQ_CFGI_0_SID, ent->cfgi.sid);
cmd[1] |= FIELD_PREP(CMDQ_CFGI_1_LEAF, ent->cfgi.leaf);
break;
case CMDQ_OP_CFGI_CD_ALL:
cmd[0] |= FIELD_PREP(CMDQ_CFGI_0_SID, ent->cfgi.sid);
break;
case CMDQ_OP_CFGI_ALL:
/* Cover the entire SID range */
cmd[1] |= FIELD_PREP(CMDQ_CFGI_1_RANGE, 31);
break;
case CMDQ_OP_TLBI_NH_VA:
cmd[0] |= FIELD_PREP(CMDQ_TLBI_0_VMID, ent->tlbi.vmid);
cmd[0] |= FIELD_PREP(CMDQ_TLBI_0_ASID, ent->tlbi.asid);
cmd[1] |= FIELD_PREP(CMDQ_TLBI_1_LEAF, ent->tlbi.leaf);
cmd[1] |= ent->tlbi.addr & CMDQ_TLBI_1_VA_MASK;
@ -1443,50 +1483,238 @@ static int arm_smmu_cmdq_issue_sync(struct arm_smmu_device *smmu)
}
/* Context descriptor manipulation functions */
static u64 arm_smmu_cpu_tcr_to_cd(u64 tcr)
static void arm_smmu_sync_cd(struct arm_smmu_domain *smmu_domain,
int ssid, bool leaf)
{
u64 val = 0;
size_t i;
unsigned long flags;
struct arm_smmu_master *master;
struct arm_smmu_device *smmu = smmu_domain->smmu;
struct arm_smmu_cmdq_ent cmd = {
.opcode = CMDQ_OP_CFGI_CD,
.cfgi = {
.ssid = ssid,
.leaf = leaf,
},
};
/* Repack the TCR. Just care about TTBR0 for now */
val |= ARM_SMMU_TCR2CD(tcr, T0SZ);
val |= ARM_SMMU_TCR2CD(tcr, TG0);
val |= ARM_SMMU_TCR2CD(tcr, IRGN0);
val |= ARM_SMMU_TCR2CD(tcr, ORGN0);
val |= ARM_SMMU_TCR2CD(tcr, SH0);
val |= ARM_SMMU_TCR2CD(tcr, EPD0);
val |= ARM_SMMU_TCR2CD(tcr, EPD1);
val |= ARM_SMMU_TCR2CD(tcr, IPS);
spin_lock_irqsave(&smmu_domain->devices_lock, flags);
list_for_each_entry(master, &smmu_domain->devices, domain_head) {
for (i = 0; i < master->num_sids; i++) {
cmd.cfgi.sid = master->sids[i];
arm_smmu_cmdq_issue_cmd(smmu, &cmd);
}
}
spin_unlock_irqrestore(&smmu_domain->devices_lock, flags);
return val;
arm_smmu_cmdq_issue_sync(smmu);
}
static void arm_smmu_write_ctx_desc(struct arm_smmu_device *smmu,
struct arm_smmu_s1_cfg *cfg)
static int arm_smmu_alloc_cd_leaf_table(struct arm_smmu_device *smmu,
struct arm_smmu_l1_ctx_desc *l1_desc)
{
size_t size = CTXDESC_L2_ENTRIES * (CTXDESC_CD_DWORDS << 3);
l1_desc->l2ptr = dmam_alloc_coherent(smmu->dev, size,
&l1_desc->l2ptr_dma, GFP_KERNEL);
if (!l1_desc->l2ptr) {
dev_warn(smmu->dev,
"failed to allocate context descriptor table\n");
return -ENOMEM;
}
return 0;
}
static void arm_smmu_write_cd_l1_desc(__le64 *dst,
struct arm_smmu_l1_ctx_desc *l1_desc)
{
u64 val = (l1_desc->l2ptr_dma & CTXDESC_L1_DESC_L2PTR_MASK) |
CTXDESC_L1_DESC_V;
WRITE_ONCE(*dst, cpu_to_le64(val));
}
static __le64 *arm_smmu_get_cd_ptr(struct arm_smmu_domain *smmu_domain,
u32 ssid)
{
__le64 *l1ptr;
unsigned int idx;
struct arm_smmu_l1_ctx_desc *l1_desc;
struct arm_smmu_device *smmu = smmu_domain->smmu;
struct arm_smmu_ctx_desc_cfg *cdcfg = &smmu_domain->s1_cfg.cdcfg;
if (smmu_domain->s1_cfg.s1fmt == STRTAB_STE_0_S1FMT_LINEAR)
return cdcfg->cdtab + ssid * CTXDESC_CD_DWORDS;
idx = ssid >> CTXDESC_SPLIT;
l1_desc = &cdcfg->l1_desc[idx];
if (!l1_desc->l2ptr) {
if (arm_smmu_alloc_cd_leaf_table(smmu, l1_desc))
return NULL;
l1ptr = cdcfg->cdtab + idx * CTXDESC_L1_DESC_DWORDS;
arm_smmu_write_cd_l1_desc(l1ptr, l1_desc);
/* An invalid L1CD can be cached */
arm_smmu_sync_cd(smmu_domain, ssid, false);
}
idx = ssid & (CTXDESC_L2_ENTRIES - 1);
return l1_desc->l2ptr + idx * CTXDESC_CD_DWORDS;
}
static int arm_smmu_write_ctx_desc(struct arm_smmu_domain *smmu_domain,
int ssid, struct arm_smmu_ctx_desc *cd)
{
/*
* This function handles the following cases:
*
* (1) Install primary CD, for normal DMA traffic (SSID = 0).
* (2) Install a secondary CD, for SID+SSID traffic.
* (3) Update ASID of a CD. Atomically write the first 64 bits of the
* CD, then invalidate the old entry and mappings.
* (4) Remove a secondary CD.
*/
u64 val;
bool cd_live;
__le64 *cdptr;
struct arm_smmu_device *smmu = smmu_domain->smmu;
if (WARN_ON(ssid >= (1 << smmu_domain->s1_cfg.s1cdmax)))
return -E2BIG;
cdptr = arm_smmu_get_cd_ptr(smmu_domain, ssid);
if (!cdptr)
return -ENOMEM;
val = le64_to_cpu(cdptr[0]);
cd_live = !!(val & CTXDESC_CD_0_V);
if (!cd) { /* (4) */
val = 0;
} else if (cd_live) { /* (3) */
val &= ~CTXDESC_CD_0_ASID;
val |= FIELD_PREP(CTXDESC_CD_0_ASID, cd->asid);
/*
* Until CD+TLB invalidation, both ASIDs may be used for tagging
* this substream's traffic
*/
} else { /* (1) and (2) */
cdptr[1] = cpu_to_le64(cd->ttbr & CTXDESC_CD_1_TTB0_MASK);
cdptr[2] = 0;
cdptr[3] = cpu_to_le64(cd->mair);
/*
* STE is live, and the SMMU might read dwords of this CD in any
* order. Ensure that it observes valid values before reading
* V=1.
*/
arm_smmu_sync_cd(smmu_domain, ssid, true);
val = cd->tcr |
#ifdef __BIG_ENDIAN
CTXDESC_CD_0_ENDI |
#endif
CTXDESC_CD_0_R | CTXDESC_CD_0_A | CTXDESC_CD_0_ASET |
CTXDESC_CD_0_AA64 |
FIELD_PREP(CTXDESC_CD_0_ASID, cd->asid) |
CTXDESC_CD_0_V;
/* STALL_MODEL==0b10 && CD.S==0 is ILLEGAL */
if (smmu->features & ARM_SMMU_FEAT_STALL_FORCE)
val |= CTXDESC_CD_0_S;
}
/*
* We don't need to issue any invalidation here, as we'll invalidate
* the STE when installing the new entry anyway.
* The SMMU accesses 64-bit values atomically. See IHI0070Ca 3.21.3
* "Configuration structures and configuration invalidation completion"
*
* The size of single-copy atomic reads made by the SMMU is
* IMPLEMENTATION DEFINED but must be at least 64 bits. Any single
* field within an aligned 64-bit span of a structure can be altered
* without first making the structure invalid.
*/
val = arm_smmu_cpu_tcr_to_cd(cfg->cd.tcr) |
#ifdef __BIG_ENDIAN
CTXDESC_CD_0_ENDI |
#endif
CTXDESC_CD_0_R | CTXDESC_CD_0_A | CTXDESC_CD_0_ASET |
CTXDESC_CD_0_AA64 | FIELD_PREP(CTXDESC_CD_0_ASID, cfg->cd.asid) |
CTXDESC_CD_0_V;
WRITE_ONCE(cdptr[0], cpu_to_le64(val));
arm_smmu_sync_cd(smmu_domain, ssid, true);
return 0;
}
/* STALL_MODEL==0b10 && CD.S==0 is ILLEGAL */
if (smmu->features & ARM_SMMU_FEAT_STALL_FORCE)
val |= CTXDESC_CD_0_S;
static int arm_smmu_alloc_cd_tables(struct arm_smmu_domain *smmu_domain)
{
int ret;
size_t l1size;
size_t max_contexts;
struct arm_smmu_device *smmu = smmu_domain->smmu;
struct arm_smmu_s1_cfg *cfg = &smmu_domain->s1_cfg;
struct arm_smmu_ctx_desc_cfg *cdcfg = &cfg->cdcfg;
cfg->cdptr[0] = cpu_to_le64(val);
max_contexts = 1 << cfg->s1cdmax;
val = cfg->cd.ttbr & CTXDESC_CD_1_TTB0_MASK;
cfg->cdptr[1] = cpu_to_le64(val);
if (!(smmu->features & ARM_SMMU_FEAT_2_LVL_CDTAB) ||
max_contexts <= CTXDESC_L2_ENTRIES) {
cfg->s1fmt = STRTAB_STE_0_S1FMT_LINEAR;
cdcfg->num_l1_ents = max_contexts;
cfg->cdptr[3] = cpu_to_le64(cfg->cd.mair);
l1size = max_contexts * (CTXDESC_CD_DWORDS << 3);
} else {
cfg->s1fmt = STRTAB_STE_0_S1FMT_64K_L2;
cdcfg->num_l1_ents = DIV_ROUND_UP(max_contexts,
CTXDESC_L2_ENTRIES);
cdcfg->l1_desc = devm_kcalloc(smmu->dev, cdcfg->num_l1_ents,
sizeof(*cdcfg->l1_desc),
GFP_KERNEL);
if (!cdcfg->l1_desc)
return -ENOMEM;
l1size = cdcfg->num_l1_ents * (CTXDESC_L1_DESC_DWORDS << 3);
}
cdcfg->cdtab = dmam_alloc_coherent(smmu->dev, l1size, &cdcfg->cdtab_dma,
GFP_KERNEL);
if (!cdcfg->cdtab) {
dev_warn(smmu->dev, "failed to allocate context descriptor\n");
ret = -ENOMEM;
goto err_free_l1;
}
return 0;
err_free_l1:
if (cdcfg->l1_desc) {
devm_kfree(smmu->dev, cdcfg->l1_desc);
cdcfg->l1_desc = NULL;
}
return ret;
}
static void arm_smmu_free_cd_tables(struct arm_smmu_domain *smmu_domain)
{
int i;
size_t size, l1size;
struct arm_smmu_device *smmu = smmu_domain->smmu;
struct arm_smmu_ctx_desc_cfg *cdcfg = &smmu_domain->s1_cfg.cdcfg;
if (cdcfg->l1_desc) {
size = CTXDESC_L2_ENTRIES * (CTXDESC_CD_DWORDS << 3);
for (i = 0; i < cdcfg->num_l1_ents; i++) {
if (!cdcfg->l1_desc[i].l2ptr)
continue;
dmam_free_coherent(smmu->dev, size,
cdcfg->l1_desc[i].l2ptr,
cdcfg->l1_desc[i].l2ptr_dma);
}
devm_kfree(smmu->dev, cdcfg->l1_desc);
cdcfg->l1_desc = NULL;
l1size = cdcfg->num_l1_ents * (CTXDESC_L1_DESC_DWORDS << 3);
} else {
l1size = cdcfg->num_l1_ents * (CTXDESC_CD_DWORDS << 3);
}
dmam_free_coherent(smmu->dev, l1size, cdcfg->cdtab, cdcfg->cdtab_dma);
cdcfg->cdtab_dma = 0;
cdcfg->cdtab = NULL;
}
/* Stream table manipulation functions */
@ -1608,6 +1836,7 @@ static void arm_smmu_write_strtab_ent(struct arm_smmu_master *master, u32 sid,
if (s1_cfg) {
BUG_ON(ste_live);
dst[1] = cpu_to_le64(
FIELD_PREP(STRTAB_STE_1_S1DSS, STRTAB_STE_1_S1DSS_SSID0) |
FIELD_PREP(STRTAB_STE_1_S1CIR, STRTAB_STE_1_S1C_CACHE_WBRA) |
FIELD_PREP(STRTAB_STE_1_S1COR, STRTAB_STE_1_S1C_CACHE_WBRA) |
FIELD_PREP(STRTAB_STE_1_S1CSH, ARM_SMMU_SH_ISH) |
@ -1617,8 +1846,10 @@ static void arm_smmu_write_strtab_ent(struct arm_smmu_master *master, u32 sid,
!(smmu->features & ARM_SMMU_FEAT_STALL_FORCE))
dst[1] |= cpu_to_le64(STRTAB_STE_1_S1STALLD);
val |= (s1_cfg->cdptr_dma & STRTAB_STE_0_S1CTXPTR_MASK) |
FIELD_PREP(STRTAB_STE_0_CFG, STRTAB_STE_0_CFG_S1_TRANS);
val |= (s1_cfg->cdcfg.cdtab_dma & STRTAB_STE_0_S1CTXPTR_MASK) |
FIELD_PREP(STRTAB_STE_0_CFG, STRTAB_STE_0_CFG_S1_TRANS) |
FIELD_PREP(STRTAB_STE_0_S1CDMAX, s1_cfg->s1cdmax) |
FIELD_PREP(STRTAB_STE_0_S1FMT, s1_cfg->s1fmt);
}
if (s2_cfg) {
@ -1642,7 +1873,8 @@ static void arm_smmu_write_strtab_ent(struct arm_smmu_master *master, u32 sid,
STRTAB_STE_1_EATS_TRANS));
arm_smmu_sync_ste_for_sid(smmu, sid);
dst[0] = cpu_to_le64(val);
/* See comment in arm_smmu_write_ctx_desc() */
WRITE_ONCE(dst[0], cpu_to_le64(val));
arm_smmu_sync_ste_for_sid(smmu, sid);
/* It's likely that we'll want to use the new STE soon */
@ -1675,7 +1907,7 @@ static int arm_smmu_init_l2_strtab(struct arm_smmu_device *smmu, u32 sid)
desc->span = STRTAB_SPLIT + 1;
desc->l2ptr = dmam_alloc_coherent(smmu->dev, size, &desc->l2ptr_dma,
GFP_KERNEL | __GFP_ZERO);
GFP_KERNEL);
if (!desc->l2ptr) {
dev_err(smmu->dev,
"failed to allocate l2 stream table for SID %u\n",
@ -2131,12 +2363,8 @@ static void arm_smmu_domain_free(struct iommu_domain *domain)
if (smmu_domain->stage == ARM_SMMU_DOMAIN_S1) {
struct arm_smmu_s1_cfg *cfg = &smmu_domain->s1_cfg;
if (cfg->cdptr) {
dmam_free_coherent(smmu_domain->smmu->dev,
CTXDESC_CD_DWORDS << 3,
cfg->cdptr,
cfg->cdptr_dma);
if (cfg->cdcfg.cdtab) {
arm_smmu_free_cd_tables(smmu_domain);
arm_smmu_bitmap_free(smmu->asid_map, cfg->cd.asid);
}
} else {
@ -2149,55 +2377,82 @@ static void arm_smmu_domain_free(struct iommu_domain *domain)
}
static int arm_smmu_domain_finalise_s1(struct arm_smmu_domain *smmu_domain,
struct arm_smmu_master *master,
struct io_pgtable_cfg *pgtbl_cfg)
{
int ret;
int asid;
struct arm_smmu_device *smmu = smmu_domain->smmu;
struct arm_smmu_s1_cfg *cfg = &smmu_domain->s1_cfg;
typeof(&pgtbl_cfg->arm_lpae_s1_cfg.tcr) tcr = &pgtbl_cfg->arm_lpae_s1_cfg.tcr;
asid = arm_smmu_bitmap_alloc(smmu->asid_map, smmu->asid_bits);
if (asid < 0)
return asid;
cfg->cdptr = dmam_alloc_coherent(smmu->dev, CTXDESC_CD_DWORDS << 3,
&cfg->cdptr_dma,
GFP_KERNEL | __GFP_ZERO);
if (!cfg->cdptr) {
dev_warn(smmu->dev, "failed to allocate context descriptor\n");
ret = -ENOMEM;
cfg->s1cdmax = master->ssid_bits;
ret = arm_smmu_alloc_cd_tables(smmu_domain);
if (ret)
goto out_free_asid;
}
cfg->cd.asid = (u16)asid;
cfg->cd.ttbr = pgtbl_cfg->arm_lpae_s1_cfg.ttbr[0];
cfg->cd.tcr = pgtbl_cfg->arm_lpae_s1_cfg.tcr;
cfg->cd.ttbr = pgtbl_cfg->arm_lpae_s1_cfg.ttbr;
cfg->cd.tcr = FIELD_PREP(CTXDESC_CD_0_TCR_T0SZ, tcr->tsz) |
FIELD_PREP(CTXDESC_CD_0_TCR_TG0, tcr->tg) |
FIELD_PREP(CTXDESC_CD_0_TCR_IRGN0, tcr->irgn) |
FIELD_PREP(CTXDESC_CD_0_TCR_ORGN0, tcr->orgn) |
FIELD_PREP(CTXDESC_CD_0_TCR_SH0, tcr->sh) |
FIELD_PREP(CTXDESC_CD_0_TCR_IPS, tcr->ips) |
CTXDESC_CD_0_TCR_EPD1 | CTXDESC_CD_0_AA64;
cfg->cd.mair = pgtbl_cfg->arm_lpae_s1_cfg.mair;
/*
* Note that this will end up calling arm_smmu_sync_cd() before
* the master has been added to the devices list for this domain.
* This isn't an issue because the STE hasn't been installed yet.
*/
ret = arm_smmu_write_ctx_desc(smmu_domain, 0, &cfg->cd);
if (ret)
goto out_free_cd_tables;
return 0;
out_free_cd_tables:
arm_smmu_free_cd_tables(smmu_domain);
out_free_asid:
arm_smmu_bitmap_free(smmu->asid_map, asid);
return ret;
}
static int arm_smmu_domain_finalise_s2(struct arm_smmu_domain *smmu_domain,
struct arm_smmu_master *master,
struct io_pgtable_cfg *pgtbl_cfg)
{
int vmid;
struct arm_smmu_device *smmu = smmu_domain->smmu;
struct arm_smmu_s2_cfg *cfg = &smmu_domain->s2_cfg;
typeof(&pgtbl_cfg->arm_lpae_s2_cfg.vtcr) vtcr;
vmid = arm_smmu_bitmap_alloc(smmu->vmid_map, smmu->vmid_bits);
if (vmid < 0)
return vmid;
vtcr = &pgtbl_cfg->arm_lpae_s2_cfg.vtcr;
cfg->vmid = (u16)vmid;
cfg->vttbr = pgtbl_cfg->arm_lpae_s2_cfg.vttbr;
cfg->vtcr = pgtbl_cfg->arm_lpae_s2_cfg.vtcr;
cfg->vtcr = FIELD_PREP(STRTAB_STE_2_VTCR_S2T0SZ, vtcr->tsz) |
FIELD_PREP(STRTAB_STE_2_VTCR_S2SL0, vtcr->sl) |
FIELD_PREP(STRTAB_STE_2_VTCR_S2IR0, vtcr->irgn) |
FIELD_PREP(STRTAB_STE_2_VTCR_S2OR0, vtcr->orgn) |
FIELD_PREP(STRTAB_STE_2_VTCR_S2SH0, vtcr->sh) |
FIELD_PREP(STRTAB_STE_2_VTCR_S2TG, vtcr->tg) |
FIELD_PREP(STRTAB_STE_2_VTCR_S2PS, vtcr->ps);
return 0;
}
static int arm_smmu_domain_finalise(struct iommu_domain *domain)
static int arm_smmu_domain_finalise(struct iommu_domain *domain,
struct arm_smmu_master *master)
{
int ret;
unsigned long ias, oas;
@ -2205,6 +2460,7 @@ static int arm_smmu_domain_finalise(struct iommu_domain *domain)
struct io_pgtable_cfg pgtbl_cfg;
struct io_pgtable_ops *pgtbl_ops;
int (*finalise_stage_fn)(struct arm_smmu_domain *,
struct arm_smmu_master *,
struct io_pgtable_cfg *);
struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
struct arm_smmu_device *smmu = smmu_domain->smmu;
@ -2259,7 +2515,7 @@ static int arm_smmu_domain_finalise(struct iommu_domain *domain)
domain->geometry.aperture_end = (1UL << pgtbl_cfg.ias) - 1;
domain->geometry.force_aperture = true;
ret = finalise_stage_fn(smmu_domain, &pgtbl_cfg);
ret = finalise_stage_fn(smmu_domain, master, &pgtbl_cfg);
if (ret < 0) {
free_io_pgtable_ops(pgtbl_ops);
return ret;
@ -2412,7 +2668,7 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev)
if (!smmu_domain->smmu) {
smmu_domain->smmu = smmu;
ret = arm_smmu_domain_finalise(domain);
ret = arm_smmu_domain_finalise(domain, master);
if (ret) {
smmu_domain->smmu = NULL;
goto out_unlock;
@ -2424,6 +2680,13 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev)
dev_name(smmu->dev));
ret = -ENXIO;
goto out_unlock;
} else if (smmu_domain->stage == ARM_SMMU_DOMAIN_S1 &&
master->ssid_bits != smmu_domain->s1_cfg.s1cdmax) {
dev_err(dev,
"cannot attach to incompatible domain (%u SSID bits != %u)\n",
smmu_domain->s1_cfg.s1cdmax, master->ssid_bits);
ret = -EINVAL;
goto out_unlock;
}
master->domain = smmu_domain;
@ -2431,9 +2694,6 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev)
if (smmu_domain->stage != ARM_SMMU_DOMAIN_BYPASS)
master->ats_enabled = arm_smmu_ats_supported(master);
if (smmu_domain->stage == ARM_SMMU_DOMAIN_S1)
arm_smmu_write_ctx_desc(smmu, &smmu_domain->s1_cfg);
arm_smmu_install_ste_for_dev(master);
spin_lock_irqsave(&smmu_domain->devices_lock, flags);
@ -2534,51 +2794,66 @@ static int arm_smmu_add_device(struct device *dev)
if (!fwspec || fwspec->ops != &arm_smmu_ops)
return -ENODEV;
/*
* We _can_ actually withstand dodgy bus code re-calling add_device()
* without an intervening remove_device()/of_xlate() sequence, but
* we're not going to do so quietly...
*/
if (WARN_ON_ONCE(fwspec->iommu_priv)) {
master = fwspec->iommu_priv;
smmu = master->smmu;
} else {
smmu = arm_smmu_get_by_fwnode(fwspec->iommu_fwnode);
if (!smmu)
return -ENODEV;
master = kzalloc(sizeof(*master), GFP_KERNEL);
if (!master)
return -ENOMEM;
master->dev = dev;
master->smmu = smmu;
master->sids = fwspec->ids;
master->num_sids = fwspec->num_ids;
fwspec->iommu_priv = master;
}
if (WARN_ON_ONCE(fwspec->iommu_priv))
return -EBUSY;
smmu = arm_smmu_get_by_fwnode(fwspec->iommu_fwnode);
if (!smmu)
return -ENODEV;
master = kzalloc(sizeof(*master), GFP_KERNEL);
if (!master)
return -ENOMEM;
master->dev = dev;
master->smmu = smmu;
master->sids = fwspec->ids;
master->num_sids = fwspec->num_ids;
fwspec->iommu_priv = master;
/* Check the SIDs are in range of the SMMU and our stream table */
for (i = 0; i < master->num_sids; i++) {
u32 sid = master->sids[i];
if (!arm_smmu_sid_in_range(smmu, sid))
return -ERANGE;
if (!arm_smmu_sid_in_range(smmu, sid)) {
ret = -ERANGE;
goto err_free_master;
}
/* Ensure l2 strtab is initialised */
if (smmu->features & ARM_SMMU_FEAT_2_LVL_STRTAB) {
ret = arm_smmu_init_l2_strtab(smmu, sid);
if (ret)
return ret;
goto err_free_master;
}
}
master->ssid_bits = min(smmu->ssid_bits, fwspec->num_pasid_bits);
if (!(smmu->features & ARM_SMMU_FEAT_2_LVL_CDTAB))
master->ssid_bits = min_t(u8, master->ssid_bits,
CTXDESC_LINEAR_CDMAX);
ret = iommu_device_link(&smmu->iommu, dev);
if (ret)
goto err_free_master;
group = iommu_group_get_for_dev(dev);
if (!IS_ERR(group)) {
iommu_group_put(group);
iommu_device_link(&smmu->iommu, dev);
if (IS_ERR(group)) {
ret = PTR_ERR(group);
goto err_unlink;
}
return PTR_ERR_OR_ZERO(group);
iommu_group_put(group);
return 0;
err_unlink:
iommu_device_unlink(&smmu->iommu, dev);
err_free_master:
kfree(master);
fwspec->iommu_priv = NULL;
return ret;
}
static void arm_smmu_remove_device(struct device *dev)
@ -2710,15 +2985,6 @@ static void arm_smmu_get_resv_regions(struct device *dev,
iommu_dma_get_resv_regions(dev, head);
}
static void arm_smmu_put_resv_regions(struct device *dev,
struct list_head *head)
{
struct iommu_resv_region *entry, *next;
list_for_each_entry_safe(entry, next, head, list)
kfree(entry);
}
static struct iommu_ops arm_smmu_ops = {
.capable = arm_smmu_capable,
.domain_alloc = arm_smmu_domain_alloc,
@ -2736,7 +3002,7 @@ static struct iommu_ops arm_smmu_ops = {
.domain_set_attr = arm_smmu_domain_set_attr,
.of_xlate = arm_smmu_of_xlate,
.get_resv_regions = arm_smmu_get_resv_regions,
.put_resv_regions = arm_smmu_put_resv_regions,
.put_resv_regions = generic_iommu_put_resv_regions,
.pgsize_bitmap = -1UL, /* Restricted during device attach */
};
@ -2883,7 +3149,7 @@ static int arm_smmu_init_strtab_2lvl(struct arm_smmu_device *smmu)
l1size = cfg->num_l1_ents * (STRTAB_L1_DESC_DWORDS << 3);
strtab = dmam_alloc_coherent(smmu->dev, l1size, &cfg->strtab_dma,
GFP_KERNEL | __GFP_ZERO);
GFP_KERNEL);
if (!strtab) {
dev_err(smmu->dev,
"failed to allocate l1 stream table (%u bytes)\n",
@ -2910,7 +3176,7 @@ static int arm_smmu_init_strtab_linear(struct arm_smmu_device *smmu)
size = (1 << smmu->sid_bits) * (STRTAB_STE_DWORDS << 3);
strtab = dmam_alloc_coherent(smmu->dev, size, &cfg->strtab_dma,
GFP_KERNEL | __GFP_ZERO);
GFP_KERNEL);
if (!strtab) {
dev_err(smmu->dev,
"failed to allocate linear stream table (%u bytes)\n",
@ -3570,6 +3836,43 @@ static unsigned long arm_smmu_resource_size(struct arm_smmu_device *smmu)
return SZ_128K;
}
static int arm_smmu_set_bus_ops(struct iommu_ops *ops)
{
int err;
#ifdef CONFIG_PCI
if (pci_bus_type.iommu_ops != ops) {
err = bus_set_iommu(&pci_bus_type, ops);
if (err)
return err;
}
#endif
#ifdef CONFIG_ARM_AMBA
if (amba_bustype.iommu_ops != ops) {
err = bus_set_iommu(&amba_bustype, ops);
if (err)
goto err_reset_pci_ops;
}
#endif
if (platform_bus_type.iommu_ops != ops) {
err = bus_set_iommu(&platform_bus_type, ops);
if (err)
goto err_reset_amba_ops;
}
return 0;
err_reset_amba_ops:
#ifdef CONFIG_ARM_AMBA
bus_set_iommu(&amba_bustype, NULL);
#endif
err_reset_pci_ops: __maybe_unused;
#ifdef CONFIG_PCI
bus_set_iommu(&pci_bus_type, NULL);
#endif
return err;
}
static int arm_smmu_device_probe(struct platform_device *pdev)
{
int irq, ret;
@ -3599,7 +3902,7 @@ static int arm_smmu_device_probe(struct platform_device *pdev)
/* Base address */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (resource_size(res) + 1 < arm_smmu_resource_size(smmu)) {
if (resource_size(res) < arm_smmu_resource_size(smmu)) {
dev_err(dev, "MMIO region too small (%pr)\n", res);
return -EINVAL;
}
@ -3660,48 +3963,45 @@ static int arm_smmu_device_probe(struct platform_device *pdev)
return ret;
}
#ifdef CONFIG_PCI
if (pci_bus_type.iommu_ops != &arm_smmu_ops) {
pci_request_acs();
ret = bus_set_iommu(&pci_bus_type, &arm_smmu_ops);
if (ret)
return ret;
}
#endif
#ifdef CONFIG_ARM_AMBA
if (amba_bustype.iommu_ops != &arm_smmu_ops) {
ret = bus_set_iommu(&amba_bustype, &arm_smmu_ops);
if (ret)
return ret;
}
#endif
if (platform_bus_type.iommu_ops != &arm_smmu_ops) {
ret = bus_set_iommu(&platform_bus_type, &arm_smmu_ops);
if (ret)
return ret;
}
return arm_smmu_set_bus_ops(&arm_smmu_ops);
}
static int arm_smmu_device_remove(struct platform_device *pdev)
{
struct arm_smmu_device *smmu = platform_get_drvdata(pdev);
arm_smmu_set_bus_ops(NULL);
iommu_device_unregister(&smmu->iommu);
iommu_device_sysfs_remove(&smmu->iommu);
arm_smmu_device_disable(smmu);
return 0;
}
static void arm_smmu_device_shutdown(struct platform_device *pdev)
{
struct arm_smmu_device *smmu = platform_get_drvdata(pdev);
arm_smmu_device_disable(smmu);
arm_smmu_device_remove(pdev);
}
static const struct of_device_id arm_smmu_of_match[] = {
{ .compatible = "arm,smmu-v3", },
{ },
};
MODULE_DEVICE_TABLE(of, arm_smmu_of_match);
static struct platform_driver arm_smmu_driver = {
.driver = {
.name = "arm-smmu-v3",
.of_match_table = of_match_ptr(arm_smmu_of_match),
.suppress_bind_attrs = true,
.name = "arm-smmu-v3",
.of_match_table = arm_smmu_of_match,
.suppress_bind_attrs = true,
},
.probe = arm_smmu_device_probe,
.remove = arm_smmu_device_remove,
.shutdown = arm_smmu_device_shutdown,
};
builtin_platform_driver(arm_smmu_driver);
module_platform_driver(arm_smmu_driver);
MODULE_DESCRIPTION("IOMMU API for ARM architected SMMUv3 implementations");
MODULE_AUTHOR("Will Deacon <will@kernel.org>");
MODULE_ALIAS("platform:arm-smmu-v3");
MODULE_LICENSE("GPL v2");

334
drivers/iommu/arm-smmu.c
View File

@ -27,8 +27,7 @@
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/init.h>
#include <linux/moduleparam.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
@ -60,10 +59,6 @@
#define MSI_IOVA_LENGTH 0x100000
static int force_stage;
/*
* not really modular, but the easiest way to keep compat with existing
* bootargs behaviour is to continue using module_param() here.
*/
module_param(force_stage, int, S_IRUGO);
MODULE_PARM_DESC(force_stage,
"Force SMMU mappings to be installed at a particular stage of translation. A value of '1' or '2' forces the corresponding stage. All other values are ignored (i.e. no stage is forced). Note that selecting a specific stage will disable support for nested translation.");
@ -131,6 +126,12 @@ static struct arm_smmu_domain *to_smmu_domain(struct iommu_domain *dom)
return container_of(dom, struct arm_smmu_domain, domain);
}
static struct platform_driver arm_smmu_driver;
static struct iommu_ops arm_smmu_ops;
#ifdef CONFIG_ARM_SMMU_LEGACY_DT_BINDINGS
static int arm_smmu_bus_init(struct iommu_ops *ops);
static struct device_node *dev_get_dev_node(struct device *dev)
{
if (dev_is_pci(dev)) {
@ -166,9 +167,6 @@ static int __find_legacy_master_phandle(struct device *dev, void *data)
return err == -ENOENT ? 0 : err;
}
static struct platform_driver arm_smmu_driver;
static struct iommu_ops arm_smmu_ops;
static int arm_smmu_register_legacy_master(struct device *dev,
struct arm_smmu_device **smmu)
{
@ -220,6 +218,27 @@ static int arm_smmu_register_legacy_master(struct device *dev,
return err;
}
/*
* With the legacy DT binding in play, we have no guarantees about
* probe order, but then we're also not doing default domains, so we can
* delay setting bus ops until we're sure every possible SMMU is ready,
* and that way ensure that no add_device() calls get missed.
*/
static int arm_smmu_legacy_bus_init(void)
{
if (using_legacy_binding)
return arm_smmu_bus_init(&arm_smmu_ops);
return 0;
}
device_initcall_sync(arm_smmu_legacy_bus_init);
#else
static int arm_smmu_register_legacy_master(struct device *dev,
struct arm_smmu_device **smmu)
{
return -ENODEV;
}
#endif /* CONFIG_ARM_SMMU_LEGACY_DT_BINDINGS */
static int __arm_smmu_alloc_bitmap(unsigned long *map, int start, int end)
{
int idx;
@ -252,7 +271,7 @@ static void __arm_smmu_tlb_sync(struct arm_smmu_device *smmu, int page,
for (delay = 1; delay < TLB_LOOP_TIMEOUT; delay *= 2) {
for (spin_cnt = TLB_SPIN_COUNT; spin_cnt > 0; spin_cnt--) {
reg = arm_smmu_readl(smmu, page, status);
if (!(reg & sTLBGSTATUS_GSACTIVE))
if (!(reg & ARM_SMMU_sTLBGSTATUS_GSACTIVE))
return;
cpu_relax();
}
@ -459,7 +478,7 @@ static irqreturn_t arm_smmu_context_fault(int irq, void *dev)
int idx = smmu_domain->cfg.cbndx;
fsr = arm_smmu_cb_read(smmu, idx, ARM_SMMU_CB_FSR);
if (!(fsr & FSR_FAULT))
if (!(fsr & ARM_SMMU_FSR_FAULT))
return IRQ_NONE;
fsynr = arm_smmu_cb_read(smmu, idx, ARM_SMMU_CB_FSYNR0);
@ -491,7 +510,7 @@ static irqreturn_t arm_smmu_global_fault(int irq, void *dev)
if (__ratelimit(&rs)) {
if (IS_ENABLED(CONFIG_ARM_SMMU_DISABLE_BYPASS_BY_DEFAULT) &&
(gfsr & sGFSR_USF))
(gfsr & ARM_SMMU_sGFSR_USF))
dev_err(smmu->dev,
"Blocked unknown Stream ID 0x%hx; boot with \"arm-smmu.disable_bypass=0\" to allow, but this may have security implications\n",
(u16)gfsynr1);
@ -521,26 +540,28 @@ static void arm_smmu_init_context_bank(struct arm_smmu_domain *smmu_domain,
if (cfg->fmt == ARM_SMMU_CTX_FMT_AARCH32_S) {
cb->tcr[0] = pgtbl_cfg->arm_v7s_cfg.tcr;
} else {
cb->tcr[0] = pgtbl_cfg->arm_lpae_s1_cfg.tcr;
cb->tcr[1] = pgtbl_cfg->arm_lpae_s1_cfg.tcr >> 32;
cb->tcr[1] |= FIELD_PREP(TCR2_SEP, TCR2_SEP_UPSTREAM);
cb->tcr[0] = arm_smmu_lpae_tcr(pgtbl_cfg);
cb->tcr[1] = arm_smmu_lpae_tcr2(pgtbl_cfg);
if (cfg->fmt == ARM_SMMU_CTX_FMT_AARCH64)
cb->tcr[1] |= TCR2_AS;
cb->tcr[1] |= ARM_SMMU_TCR2_AS;
else
cb->tcr[0] |= ARM_SMMU_TCR_EAE;
}
} else {
cb->tcr[0] = pgtbl_cfg->arm_lpae_s2_cfg.vtcr;
cb->tcr[0] = arm_smmu_lpae_vtcr(pgtbl_cfg);
}
/* TTBRs */
if (stage1) {
if (cfg->fmt == ARM_SMMU_CTX_FMT_AARCH32_S) {
cb->ttbr[0] = pgtbl_cfg->arm_v7s_cfg.ttbr[0];
cb->ttbr[1] = pgtbl_cfg->arm_v7s_cfg.ttbr[1];
cb->ttbr[0] = pgtbl_cfg->arm_v7s_cfg.ttbr;
cb->ttbr[1] = 0;
} else {
cb->ttbr[0] = pgtbl_cfg->arm_lpae_s1_cfg.ttbr[0];
cb->ttbr[0] |= FIELD_PREP(TTBRn_ASID, cfg->asid);
cb->ttbr[1] = pgtbl_cfg->arm_lpae_s1_cfg.ttbr[1];
cb->ttbr[1] |= FIELD_PREP(TTBRn_ASID, cfg->asid);
cb->ttbr[0] = pgtbl_cfg->arm_lpae_s1_cfg.ttbr;
cb->ttbr[0] |= FIELD_PREP(ARM_SMMU_TTBRn_ASID,
cfg->asid);
cb->ttbr[1] = FIELD_PREP(ARM_SMMU_TTBRn_ASID,
cfg->asid);
}
} else {
cb->ttbr[0] = pgtbl_cfg->arm_lpae_s2_cfg.vttbr;
@ -576,31 +597,33 @@ static void arm_smmu_write_context_bank(struct arm_smmu_device *smmu, int idx)
/* CBA2R */
if (smmu->version > ARM_SMMU_V1) {
if (cfg->fmt == ARM_SMMU_CTX_FMT_AARCH64)
reg = CBA2R_VA64;
reg = ARM_SMMU_CBA2R_VA64;
else
reg = 0;
/* 16-bit VMIDs live in CBA2R */
if (smmu->features & ARM_SMMU_FEAT_VMID16)
reg |= FIELD_PREP(CBA2R_VMID16, cfg->vmid);
reg |= FIELD_PREP(ARM_SMMU_CBA2R_VMID16, cfg->vmid);
arm_smmu_gr1_write(smmu, ARM_SMMU_GR1_CBA2R(idx), reg);
}
/* CBAR */
reg = FIELD_PREP(CBAR_TYPE, cfg->cbar);
reg = FIELD_PREP(ARM_SMMU_CBAR_TYPE, cfg->cbar);
if (smmu->version < ARM_SMMU_V2)
reg |= FIELD_PREP(CBAR_IRPTNDX, cfg->irptndx);
reg |= FIELD_PREP(ARM_SMMU_CBAR_IRPTNDX, cfg->irptndx);
/*
* Use the weakest shareability/memory types, so they are
* overridden by the ttbcr/pte.
*/
if (stage1) {
reg |= FIELD_PREP(CBAR_S1_BPSHCFG, CBAR_S1_BPSHCFG_NSH) |
FIELD_PREP(CBAR_S1_MEMATTR, CBAR_S1_MEMATTR_WB);
reg |= FIELD_PREP(ARM_SMMU_CBAR_S1_BPSHCFG,
ARM_SMMU_CBAR_S1_BPSHCFG_NSH) |
FIELD_PREP(ARM_SMMU_CBAR_S1_MEMATTR,
ARM_SMMU_CBAR_S1_MEMATTR_WB);
} else if (!(smmu->features & ARM_SMMU_FEAT_VMID16)) {
/* 8-bit VMIDs live in CBAR */
reg |= FIELD_PREP(CBAR_VMID, cfg->vmid);
reg |= FIELD_PREP(ARM_SMMU_CBAR_VMID, cfg->vmid);
}
arm_smmu_gr1_write(smmu, ARM_SMMU_GR1_CBAR(idx), reg);
@ -632,11 +655,12 @@ static void arm_smmu_write_context_bank(struct arm_smmu_device *smmu, int idx)
}
/* SCTLR */
reg = SCTLR_CFIE | SCTLR_CFRE | SCTLR_AFE | SCTLR_TRE | SCTLR_M;
reg = ARM_SMMU_SCTLR_CFIE | ARM_SMMU_SCTLR_CFRE | ARM_SMMU_SCTLR_AFE |
ARM_SMMU_SCTLR_TRE | ARM_SMMU_SCTLR_M;
if (stage1)
reg |= SCTLR_S1_ASIDPNE;
reg |= ARM_SMMU_SCTLR_S1_ASIDPNE;
if (IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
reg |= SCTLR_E;
reg |= ARM_SMMU_SCTLR_E;
arm_smmu_cb_write(smmu, idx, ARM_SMMU_CB_SCTLR, reg);
}
@ -818,7 +842,7 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
if (ret < 0) {
dev_err(smmu->dev, "failed to request context IRQ %d (%u)\n",
cfg->irptndx, irq);
cfg->irptndx = INVALID_IRPTNDX;
cfg->irptndx = ARM_SMMU_INVALID_IRPTNDX;
}
mutex_unlock(&smmu_domain->init_mutex);
@ -856,7 +880,7 @@ static void arm_smmu_destroy_domain_context(struct iommu_domain *domain)
smmu->cbs[cfg->cbndx].cfg = NULL;
arm_smmu_write_context_bank(smmu, cfg->cbndx);
if (cfg->irptndx != INVALID_IRPTNDX) {
if (cfg->irptndx != ARM_SMMU_INVALID_IRPTNDX) {
irq = smmu->irqs[smmu->num_global_irqs + cfg->irptndx];
devm_free_irq(smmu->dev, irq, domain);
}
@ -912,23 +936,24 @@ static void arm_smmu_domain_free(struct iommu_domain *domain)
static void arm_smmu_write_smr(struct arm_smmu_device *smmu, int idx)
{
struct arm_smmu_smr *smr = smmu->smrs + idx;
u32 reg = FIELD_PREP(SMR_ID, smr->id) | FIELD_PREP(SMR_MASK, smr->mask);
u32 reg = FIELD_PREP(ARM_SMMU_SMR_ID, smr->id) |
FIELD_PREP(ARM_SMMU_SMR_MASK, smr->mask);
if (!(smmu->features & ARM_SMMU_FEAT_EXIDS) && smr->valid)
reg |= SMR_VALID;
reg |= ARM_SMMU_SMR_VALID;
arm_smmu_gr0_write(smmu, ARM_SMMU_GR0_SMR(idx), reg);
}
static void arm_smmu_write_s2cr(struct arm_smmu_device *smmu, int idx)
{
struct arm_smmu_s2cr *s2cr = smmu->s2crs + idx;
u32 reg = FIELD_PREP(S2CR_TYPE, s2cr->type) |
FIELD_PREP(S2CR_CBNDX, s2cr->cbndx) |
FIELD_PREP(S2CR_PRIVCFG, s2cr->privcfg);
u32 reg = FIELD_PREP(ARM_SMMU_S2CR_TYPE, s2cr->type) |
FIELD_PREP(ARM_SMMU_S2CR_CBNDX, s2cr->cbndx) |
FIELD_PREP(ARM_SMMU_S2CR_PRIVCFG, s2cr->privcfg);
if (smmu->features & ARM_SMMU_FEAT_EXIDS && smmu->smrs &&
smmu->smrs[idx].valid)
reg |= S2CR_EXIDVALID;
reg |= ARM_SMMU_S2CR_EXIDVALID;
arm_smmu_gr0_write(smmu, ARM_SMMU_GR0_S2CR(idx), reg);
}
@ -946,24 +971,37 @@ static void arm_smmu_write_sme(struct arm_smmu_device *smmu, int idx)
static void arm_smmu_test_smr_masks(struct arm_smmu_device *smmu)
{
u32 smr;
int i;
if (!smmu->smrs)
return;
/*
* If we've had to accommodate firmware memory regions, we may
* have live SMRs by now; tread carefully...
*
* Somewhat perversely, not having a free SMR for this test implies we
* can get away without it anyway, as we'll only be able to 'allocate'
* these SMRs for the ID/mask values we're already trusting to be OK.
*/
for (i = 0; i < smmu->num_mapping_groups; i++)
if (!smmu->smrs[i].valid)
goto smr_ok;
return;
smr_ok:
/*
* SMR.ID bits may not be preserved if the corresponding MASK
* bits are set, so check each one separately. We can reject
* masters later if they try to claim IDs outside these masks.
*/
smr = FIELD_PREP(SMR_ID, smmu->streamid_mask);
arm_smmu_gr0_write(smmu, ARM_SMMU_GR0_SMR(0), smr);
smr = arm_smmu_gr0_read(smmu, ARM_SMMU_GR0_SMR(0));
smmu->streamid_mask = FIELD_GET(SMR_ID, smr);
smr = FIELD_PREP(ARM_SMMU_SMR_ID, smmu->streamid_mask);
arm_smmu_gr0_write(smmu, ARM_SMMU_GR0_SMR(i), smr);
smr = arm_smmu_gr0_read(smmu, ARM_SMMU_GR0_SMR(i));
smmu->streamid_mask = FIELD_GET(ARM_SMMU_SMR_ID, smr);
smr = FIELD_PREP(SMR_MASK, smmu->streamid_mask);
arm_smmu_gr0_write(smmu, ARM_SMMU_GR0_SMR(0), smr);
smr = arm_smmu_gr0_read(smmu, ARM_SMMU_GR0_SMR(0));
smmu->smr_mask_mask = FIELD_GET(SMR_MASK, smr);
smr = FIELD_PREP(ARM_SMMU_SMR_MASK, smmu->streamid_mask);
arm_smmu_gr0_write(smmu, ARM_SMMU_GR0_SMR(i), smr);
smr = arm_smmu_gr0_read(smmu, ARM_SMMU_GR0_SMR(i));
smmu->smr_mask_mask = FIELD_GET(ARM_SMMU_SMR_MASK, smr);
}
static int arm_smmu_find_sme(struct arm_smmu_device *smmu, u16 id, u16 mask)
@ -1032,8 +1070,8 @@ static int arm_smmu_master_alloc_smes(struct device *dev)
mutex_lock(&smmu->stream_map_mutex);
/* Figure out a viable stream map entry allocation */
for_each_cfg_sme(fwspec, i, idx) {
u16 sid = FIELD_GET(SMR_ID, fwspec->ids[i]);
u16 mask = FIELD_GET(SMR_MASK, fwspec->ids[i]);
u16 sid = FIELD_GET(ARM_SMMU_SMR_ID, fwspec->ids[i]);
u16 mask = FIELD_GET(ARM_SMMU_SMR_MASK, fwspec->ids[i]);
if (idx != INVALID_SMENDX) {
ret = -EEXIST;
@ -1277,7 +1315,8 @@ static phys_addr_t arm_smmu_iova_to_phys_hard(struct iommu_domain *domain,
arm_smmu_cb_write(smmu, idx, ARM_SMMU_CB_ATS1PR, va);
reg = arm_smmu_page(smmu, ARM_SMMU_CB(smmu, idx)) + ARM_SMMU_CB_ATSR;
if (readl_poll_timeout_atomic(reg, tmp, !(tmp & ATSR_ACTIVE), 5, 50)) {
if (readl_poll_timeout_atomic(reg, tmp, !(tmp & ARM_SMMU_ATSR_ACTIVE),
5, 50)) {
spin_unlock_irqrestore(&smmu_domain->cb_lock, flags);
dev_err(dev,
"iova to phys timed out on %pad. Falling back to software table walk.\n",
@ -1287,7 +1326,7 @@ static phys_addr_t arm_smmu_iova_to_phys_hard(struct iommu_domain *domain,
phys = arm_smmu_cb_readq(smmu, idx, ARM_SMMU_CB_PAR);
spin_unlock_irqrestore(&smmu_domain->cb_lock, flags);
if (phys & CB_PAR_F) {
if (phys & ARM_SMMU_CB_PAR_F) {
dev_err(dev, "translation fault!\n");
dev_err(dev, "PAR = 0x%llx\n", phys);
return 0;
@ -1368,8 +1407,8 @@ static int arm_smmu_add_device(struct device *dev)
ret = -EINVAL;
for (i = 0; i < fwspec->num_ids; i++) {
u16 sid = FIELD_GET(SMR_ID, fwspec->ids[i]);
u16 mask = FIELD_GET(SMR_MASK, fwspec->ids[i]);
u16 sid = FIELD_GET(ARM_SMMU_SMR_ID, fwspec->ids[i]);
u16 mask = FIELD_GET(ARM_SMMU_SMR_MASK, fwspec->ids[i]);
if (sid & ~smmu->streamid_mask) {
dev_err(dev, "stream ID 0x%x out of range for SMMU (0x%x)\n",
@ -1550,12 +1589,12 @@ static int arm_smmu_of_xlate(struct device *dev, struct of_phandle_args *args)
u32 mask, fwid = 0;
if (args->args_count > 0)
fwid |= FIELD_PREP(SMR_ID, args->args[0]);
fwid |= FIELD_PREP(ARM_SMMU_SMR_ID, args->args[0]);
if (args->args_count > 1)
fwid |= FIELD_PREP(SMR_MASK, args->args[1]);
fwid |= FIELD_PREP(ARM_SMMU_SMR_MASK, args->args[1]);
else if (!of_property_read_u32(args->np, "stream-match-mask", &mask))
fwid |= FIELD_PREP(SMR_MASK, mask);
fwid |= FIELD_PREP(ARM_SMMU_SMR_MASK, mask);
return iommu_fwspec_add_ids(dev, &fwid, 1);
}
@ -1576,15 +1615,6 @@ static void arm_smmu_get_resv_regions(struct device *dev,
iommu_dma_get_resv_regions(dev, head);
}
static void arm_smmu_put_resv_regions(struct device *dev,
struct list_head *head)
{
struct iommu_resv_region *entry, *next;
list_for_each_entry_safe(entry, next, head, list)
kfree(entry);
}
static struct iommu_ops arm_smmu_ops = {
.capable = arm_smmu_capable,
.domain_alloc = arm_smmu_domain_alloc,
@ -1602,7 +1632,7 @@ static struct iommu_ops arm_smmu_ops = {
.domain_set_attr = arm_smmu_domain_set_attr,
.of_xlate = arm_smmu_of_xlate,
.get_resv_regions = arm_smmu_get_resv_regions,
.put_resv_regions = arm_smmu_put_resv_regions,
.put_resv_regions = generic_iommu_put_resv_regions,
.pgsize_bitmap = -1UL, /* Restricted during device attach */
};
@ -1625,7 +1655,7 @@ static void arm_smmu_device_reset(struct arm_smmu_device *smmu)
/* Make sure all context banks are disabled and clear CB_FSR */
for (i = 0; i < smmu->num_context_banks; ++i) {
arm_smmu_write_context_bank(smmu, i);
arm_smmu_cb_write(smmu, i, ARM_SMMU_CB_FSR, FSR_FAULT);
arm_smmu_cb_write(smmu, i, ARM_SMMU_CB_FSR, ARM_SMMU_FSR_FAULT);
}
/* Invalidate the TLB, just in case */
@ -1635,29 +1665,30 @@ static void arm_smmu_device_reset(struct arm_smmu_device *smmu)
reg = arm_smmu_gr0_read(smmu, ARM_SMMU_GR0_sCR0);
/* Enable fault reporting */
reg |= (sCR0_GFRE | sCR0_GFIE | sCR0_GCFGFRE | sCR0_GCFGFIE);
reg |= (ARM_SMMU_sCR0_GFRE | ARM_SMMU_sCR0_GFIE |
ARM_SMMU_sCR0_GCFGFRE | ARM_SMMU_sCR0_GCFGFIE);
/* Disable TLB broadcasting. */
reg |= (sCR0_VMIDPNE | sCR0_PTM);
reg |= (ARM_SMMU_sCR0_VMIDPNE | ARM_SMMU_sCR0_PTM);
/* Enable client access, handling unmatched streams as appropriate */
reg &= ~sCR0_CLIENTPD;
reg &= ~ARM_SMMU_sCR0_CLIENTPD;
if (disable_bypass)
reg |= sCR0_USFCFG;
reg |= ARM_SMMU_sCR0_USFCFG;
else
reg &= ~sCR0_USFCFG;
reg &= ~ARM_SMMU_sCR0_USFCFG;
/* Disable forced broadcasting */
reg &= ~sCR0_FB;
reg &= ~ARM_SMMU_sCR0_FB;
/* Don't upgrade barriers */
reg &= ~(sCR0_BSU);
reg &= ~(ARM_SMMU_sCR0_BSU);
if (smmu->features & ARM_SMMU_FEAT_VMID16)
reg |= sCR0_VMID16EN;
reg |= ARM_SMMU_sCR0_VMID16EN;
if (smmu->features & ARM_SMMU_FEAT_EXIDS)
reg |= sCR0_EXIDENABLE;
reg |= ARM_SMMU_sCR0_EXIDENABLE;
if (smmu->impl && smmu->impl->reset)
smmu->impl->reset(smmu);
@ -1702,21 +1733,21 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
/* Restrict available stages based on module parameter */
if (force_stage == 1)
id &= ~(ID0_S2TS | ID0_NTS);
id &= ~(ARM_SMMU_ID0_S2TS | ARM_SMMU_ID0_NTS);
else if (force_stage == 2)
id &= ~(ID0_S1TS | ID0_NTS);
id &= ~(ARM_SMMU_ID0_S1TS | ARM_SMMU_ID0_NTS);
if (id & ID0_S1TS) {
if (id & ARM_SMMU_ID0_S1TS) {
smmu->features |= ARM_SMMU_FEAT_TRANS_S1;
dev_notice(smmu->dev, "\tstage 1 translation\n");
}
if (id & ID0_S2TS) {
if (id & ARM_SMMU_ID0_S2TS) {
smmu->features |= ARM_SMMU_FEAT_TRANS_S2;
dev_notice(smmu->dev, "\tstage 2 translation\n");
}
if (id & ID0_NTS) {
if (id & ARM_SMMU_ID0_NTS) {
smmu->features |= ARM_SMMU_FEAT_TRANS_NESTED;
dev_notice(smmu->dev, "\tnested translation\n");
}
@ -1727,8 +1758,8 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
return -ENODEV;
}
if ((id & ID0_S1TS) &&
((smmu->version < ARM_SMMU_V2) || !(id & ID0_ATOSNS))) {
if ((id & ARM_SMMU_ID0_S1TS) &&
((smmu->version < ARM_SMMU_V2) || !(id & ARM_SMMU_ID0_ATOSNS))) {
smmu->features |= ARM_SMMU_FEAT_TRANS_OPS;
dev_notice(smmu->dev, "\taddress translation ops\n");
}
@ -1739,7 +1770,7 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
* Fortunately, this also opens up a workaround for systems where the
* ID register value has ended up configured incorrectly.
*/
cttw_reg = !!(id & ID0_CTTW);
cttw_reg = !!(id & ARM_SMMU_ID0_CTTW);
if (cttw_fw || cttw_reg)
dev_notice(smmu->dev, "\t%scoherent table walk\n",
cttw_fw ? "" : "non-");
@ -1748,16 +1779,16 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
"\t(IDR0.CTTW overridden by FW configuration)\n");
/* Max. number of entries we have for stream matching/indexing */
if (smmu->version == ARM_SMMU_V2 && id & ID0_EXIDS) {
if (smmu->version == ARM_SMMU_V2 && id & ARM_SMMU_ID0_EXIDS) {
smmu->features |= ARM_SMMU_FEAT_EXIDS;
size = 1 << 16;
} else {
size = 1 << FIELD_GET(ID0_NUMSIDB, id);
size = 1 << FIELD_GET(ARM_SMMU_ID0_NUMSIDB, id);
}
smmu->streamid_mask = size - 1;
if (id & ID0_SMS) {
if (id & ARM_SMMU_ID0_SMS) {
smmu->features |= ARM_SMMU_FEAT_STREAM_MATCH;
size = FIELD_GET(ID0_NUMSMRG, id);
size = FIELD_GET(ARM_SMMU_ID0_NUMSMRG, id);
if (size == 0) {
dev_err(smmu->dev,
"stream-matching supported, but no SMRs present!\n");
@ -1785,18 +1816,19 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
mutex_init(&smmu->stream_map_mutex);
spin_lock_init(&smmu->global_sync_lock);
if (smmu->version < ARM_SMMU_V2 || !(id & ID0_PTFS_NO_AARCH32)) {
if (smmu->version < ARM_SMMU_V2 ||
!(id & ARM_SMMU_ID0_PTFS_NO_AARCH32)) {
smmu->features |= ARM_SMMU_FEAT_FMT_AARCH32_L;
if (!(id & ID0_PTFS_NO_AARCH32S))
if (!(id & ARM_SMMU_ID0_PTFS_NO_AARCH32S))
smmu->features |= ARM_SMMU_FEAT_FMT_AARCH32_S;
}
/* ID1 */
id = arm_smmu_gr0_read(smmu, ARM_SMMU_GR0_ID1);
smmu->pgshift = (id & ID1_PAGESIZE) ? 16 : 12;
smmu->pgshift = (id & ARM_SMMU_ID1_PAGESIZE) ? 16 : 12;
/* Check for size mismatch of SMMU address space from mapped region */
size = 1 << (FIELD_GET(ID1_NUMPAGENDXB, id) + 1);
size = 1 << (FIELD_GET(ARM_SMMU_ID1_NUMPAGENDXB, id) + 1);
if (smmu->numpage != 2 * size << smmu->pgshift)
dev_warn(smmu->dev,
"SMMU address space size (0x%x) differs from mapped region size (0x%x)!\n",
@ -1804,8 +1836,8 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
/* Now properly encode NUMPAGE to subsequently derive SMMU_CB_BASE */
smmu->numpage = size;
smmu->num_s2_context_banks = FIELD_GET(ID1_NUMS2CB, id);
smmu->num_context_banks = FIELD_GET(ID1_NUMCB, id);
smmu->num_s2_context_banks = FIELD_GET(ARM_SMMU_ID1_NUMS2CB, id);
smmu->num_context_banks = FIELD_GET(ARM_SMMU_ID1_NUMCB, id);
if (smmu->num_s2_context_banks > smmu->num_context_banks) {
dev_err(smmu->dev, "impossible number of S2 context banks!\n");
return -ENODEV;
@ -1819,14 +1851,14 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
/* ID2 */
id = arm_smmu_gr0_read(smmu, ARM_SMMU_GR0_ID2);
size = arm_smmu_id_size_to_bits(FIELD_GET(ID2_IAS, id));
size = arm_smmu_id_size_to_bits(FIELD_GET(ARM_SMMU_ID2_IAS, id));
smmu->ipa_size = size;
/* The output mask is also applied for bypass */
size = arm_smmu_id_size_to_bits(FIELD_GET(ID2_OAS, id));
size = arm_smmu_id_size_to_bits(FIELD_GET(ARM_SMMU_ID2_OAS, id));
smmu->pa_size = size;
if (id & ID2_VMID16)
if (id & ARM_SMMU_ID2_VMID16)
smmu->features |= ARM_SMMU_FEAT_VMID16;
/*
@ -1843,13 +1875,13 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
if (smmu->version == ARM_SMMU_V1_64K)
smmu->features |= ARM_SMMU_FEAT_FMT_AARCH64_64K;
} else {
size = FIELD_GET(ID2_UBS, id);
size = FIELD_GET(ARM_SMMU_ID2_UBS, id);
smmu->va_size = arm_smmu_id_size_to_bits(size);
if (id & ID2_PTFS_4K)
if (id & ARM_SMMU_ID2_PTFS_4K)
smmu->features |= ARM_SMMU_FEAT_FMT_AARCH64_4K;
if (id & ID2_PTFS_16K)
if (id & ARM_SMMU_ID2_PTFS_16K)
smmu->features |= ARM_SMMU_FEAT_FMT_AARCH64_16K;
if (id & ID2_PTFS_64K)
if (id & ARM_SMMU_ID2_PTFS_64K)
smmu->features |= ARM_SMMU_FEAT_FMT_AARCH64_64K;
}
@ -1911,6 +1943,7 @@ static const struct of_device_id arm_smmu_of_match[] = {
{ .compatible = "qcom,smmu-v2", .data = &qcom_smmuv2 },
{ },
};
MODULE_DEVICE_TABLE(of, arm_smmu_of_match);
#ifdef CONFIG_ACPI
static int acpi_smmu_get_data(u32 model, struct arm_smmu_device *smmu)
@ -1997,8 +2030,10 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev,
legacy_binding = of_find_property(dev->of_node, "mmu-masters", NULL);
if (legacy_binding && !using_generic_binding) {
if (!using_legacy_binding)
pr_notice("deprecated \"mmu-masters\" DT property in use; DMA API support unavailable\n");
if (!using_legacy_binding) {
pr_notice("deprecated \"mmu-masters\" DT property in use; %s support unavailable\n",
IS_ENABLED(CONFIG_ARM_SMMU_LEGACY_DT_BINDINGS) ? "DMA API" : "SMMU");
}
using_legacy_binding = true;
} else if (!legacy_binding && !using_legacy_binding) {
using_generic_binding = true;
@ -2013,25 +2048,50 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev,
return 0;
}
static void arm_smmu_bus_init(void)
static int arm_smmu_bus_init(struct iommu_ops *ops)
{
int err;
/* Oh, for a proper bus abstraction */
if (!iommu_present(&platform_bus_type))
bus_set_iommu(&platform_bus_type, &arm_smmu_ops);
if (!iommu_present(&platform_bus_type)) {
err = bus_set_iommu(&platform_bus_type, ops);
if (err)
return err;
}
#ifdef CONFIG_ARM_AMBA
if (!iommu_present(&amba_bustype))
bus_set_iommu(&amba_bustype, &arm_smmu_ops);
if (!iommu_present(&amba_bustype)) {
err = bus_set_iommu(&amba_bustype, ops);
if (err)
goto err_reset_platform_ops;
}
#endif
#ifdef CONFIG_PCI
if (!iommu_present(&pci_bus_type)) {
pci_request_acs();
bus_set_iommu(&pci_bus_type, &arm_smmu_ops);
err = bus_set_iommu(&pci_bus_type, ops);
if (err)
goto err_reset_amba_ops;
}
#endif
#ifdef CONFIG_FSL_MC_BUS
if (!iommu_present(&fsl_mc_bus_type))
bus_set_iommu(&fsl_mc_bus_type, &arm_smmu_ops);
if (!iommu_present(&fsl_mc_bus_type)) {
err = bus_set_iommu(&fsl_mc_bus_type, ops);
if (err)
goto err_reset_pci_ops;
}
#endif
return 0;
err_reset_pci_ops: __maybe_unused;
#ifdef CONFIG_PCI
bus_set_iommu(&pci_bus_type, NULL);
#endif
err_reset_amba_ops: __maybe_unused;
#ifdef CONFIG_ARM_AMBA
bus_set_iommu(&amba_bustype, NULL);
#endif
err_reset_platform_ops: __maybe_unused;
bus_set_iommu(&platform_bus_type, NULL);
return err;
}
static int arm_smmu_device_probe(struct platform_device *pdev)
@ -2177,38 +2237,28 @@ static int arm_smmu_device_probe(struct platform_device *pdev)
* ready to handle default domain setup as soon as any SMMU exists.
*/
if (!using_legacy_binding)
arm_smmu_bus_init();
return arm_smmu_bus_init(&arm_smmu_ops);
return 0;
}
/*
* With the legacy DT binding in play, though, we have no guarantees about
* probe order, but then we're also not doing default domains, so we can
* delay setting bus ops until we're sure every possible SMMU is ready,
* and that way ensure that no add_device() calls get missed.
*/
static int arm_smmu_legacy_bus_init(void)
{
if (using_legacy_binding)
arm_smmu_bus_init();
return 0;
}
device_initcall_sync(arm_smmu_legacy_bus_init);
static void arm_smmu_device_shutdown(struct platform_device *pdev)
static int arm_smmu_device_remove(struct platform_device *pdev)
{
struct arm_smmu_device *smmu = platform_get_drvdata(pdev);
if (!smmu)
return;
return -ENODEV;
if (!bitmap_empty(smmu->context_map, ARM_SMMU_MAX_CBS))
dev_err(&pdev->dev, "removing device with active domains!\n");
arm_smmu_bus_init(NULL);
iommu_device_unregister(&smmu->iommu);
iommu_device_sysfs_remove(&smmu->iommu);
arm_smmu_rpm_get(smmu);
/* Turn the thing off */
arm_smmu_gr0_write(smmu, ARM_SMMU_GR0_sCR0, sCR0_CLIENTPD);
arm_smmu_gr0_write(smmu, ARM_SMMU_GR0_sCR0, ARM_SMMU_sCR0_CLIENTPD);
arm_smmu_rpm_put(smmu);
if (pm_runtime_enabled(smmu->dev))
@ -2217,6 +2267,12 @@ static void arm_smmu_device_shutdown(struct platform_device *pdev)
clk_bulk_disable(smmu->num_clks, smmu->clks);
clk_bulk_unprepare(smmu->num_clks, smmu->clks);
return 0;
}
static void arm_smmu_device_shutdown(struct platform_device *pdev)
{
arm_smmu_device_remove(pdev);
}
static int __maybe_unused arm_smmu_runtime_resume(struct device *dev)
@ -2267,11 +2323,17 @@ static const struct dev_pm_ops arm_smmu_pm_ops = {
static struct platform_driver arm_smmu_driver = {
.driver = {
.name = "arm-smmu",
.of_match_table = of_match_ptr(arm_smmu_of_match),
.of_match_table = arm_smmu_of_match,
.pm = &arm_smmu_pm_ops,
.suppress_bind_attrs = true,
.suppress_bind_attrs = true,
},
.probe = arm_smmu_device_probe,
.remove = arm_smmu_device_remove,
.shutdown = arm_smmu_device_shutdown,
};
builtin_platform_driver(arm_smmu_driver);
module_platform_driver(arm_smmu_driver);
MODULE_DESCRIPTION("IOMMU API for ARM architected SMMU implementations");
MODULE_AUTHOR("Will Deacon <will@kernel.org>");
MODULE_ALIAS("platform:arm-smmu");
MODULE_LICENSE("GPL v2");

226
drivers/iommu/arm-smmu.h
View File

@ -11,6 +11,7 @@
#define _ARM_SMMU_H
#include <linux/atomic.h>
#include <linux/bitfield.h>
#include <linux/bits.h>
#include <linux/clk.h>
#include <linux/device.h>
@ -23,51 +24,51 @@
/* Configuration registers */
#define ARM_SMMU_GR0_sCR0 0x0
#define sCR0_VMID16EN BIT(31)
#define sCR0_BSU GENMASK(15, 14)
#define sCR0_FB BIT(13)
#define sCR0_PTM BIT(12)
#define sCR0_VMIDPNE BIT(11)
#define sCR0_USFCFG BIT(10)
#define sCR0_GCFGFIE BIT(5)
#define sCR0_GCFGFRE BIT(4)
#define sCR0_EXIDENABLE BIT(3)
#define sCR0_GFIE BIT(2)
#define sCR0_GFRE BIT(1)
#define sCR0_CLIENTPD BIT(0)
#define ARM_SMMU_sCR0_VMID16EN BIT(31)
#define ARM_SMMU_sCR0_BSU GENMASK(15, 14)
#define ARM_SMMU_sCR0_FB BIT(13)
#define ARM_SMMU_sCR0_PTM BIT(12)
#define ARM_SMMU_sCR0_VMIDPNE BIT(11)
#define ARM_SMMU_sCR0_USFCFG BIT(10)
#define ARM_SMMU_sCR0_GCFGFIE BIT(5)
#define ARM_SMMU_sCR0_GCFGFRE BIT(4)
#define ARM_SMMU_sCR0_EXIDENABLE BIT(3)
#define ARM_SMMU_sCR0_GFIE BIT(2)
#define ARM_SMMU_sCR0_GFRE BIT(1)
#define ARM_SMMU_sCR0_CLIENTPD BIT(0)
/* Auxiliary Configuration register */
#define ARM_SMMU_GR0_sACR 0x10
/* Identification registers */
#define ARM_SMMU_GR0_ID0 0x20
#define ID0_S1TS BIT(30)
#define ID0_S2TS BIT(29)
#define ID0_NTS BIT(28)
#define ID0_SMS BIT(27)
#define ID0_ATOSNS BIT(26)
#define ID0_PTFS_NO_AARCH32 BIT(25)
#define ID0_PTFS_NO_AARCH32S BIT(24)
#define ID0_NUMIRPT GENMASK(23, 16)
#define ID0_CTTW BIT(14)
#define ID0_NUMSIDB GENMASK(12, 9)
#define ID0_EXIDS BIT(8)
#define ID0_NUMSMRG GENMASK(7, 0)
#define ARM_SMMU_ID0_S1TS BIT(30)
#define ARM_SMMU_ID0_S2TS BIT(29)
#define ARM_SMMU_ID0_NTS BIT(28)
#define ARM_SMMU_ID0_SMS BIT(27)
#define ARM_SMMU_ID0_ATOSNS BIT(26)
#define ARM_SMMU_ID0_PTFS_NO_AARCH32 BIT(25)
#define ARM_SMMU_ID0_PTFS_NO_AARCH32S BIT(24)
#define ARM_SMMU_ID0_NUMIRPT GENMASK(23, 16)
#define ARM_SMMU_ID0_CTTW BIT(14)
#define ARM_SMMU_ID0_NUMSIDB GENMASK(12, 9)
#define ARM_SMMU_ID0_EXIDS BIT(8)
#define ARM_SMMU_ID0_NUMSMRG GENMASK(7, 0)
#define ARM_SMMU_GR0_ID1 0x24
#define ID1_PAGESIZE BIT(31)
#define ID1_NUMPAGENDXB GENMASK(30, 28)
#define ID1_NUMS2CB GENMASK(23, 16)
#define ID1_NUMCB GENMASK(7, 0)
#define ARM_SMMU_ID1_PAGESIZE BIT(31)
#define ARM_SMMU_ID1_NUMPAGENDXB GENMASK(30, 28)
#define ARM_SMMU_ID1_NUMS2CB GENMASK(23, 16)
#define ARM_SMMU_ID1_NUMCB GENMASK(7, 0)
#define ARM_SMMU_GR0_ID2 0x28
#define ID2_VMID16 BIT(15)
#define ID2_PTFS_64K BIT(14)
#define ID2_PTFS_16K BIT(13)
#define ID2_PTFS_4K BIT(12)
#define ID2_UBS GENMASK(11, 8)
#define ID2_OAS GENMASK(7, 4)
#define ID2_IAS GENMASK(3, 0)
#define ARM_SMMU_ID2_VMID16 BIT(15)
#define ARM_SMMU_ID2_PTFS_64K BIT(14)
#define ARM_SMMU_ID2_PTFS_16K BIT(13)
#define ARM_SMMU_ID2_PTFS_4K BIT(12)
#define ARM_SMMU_ID2_UBS GENMASK(11, 8)
#define ARM_SMMU_ID2_OAS GENMASK(7, 4)
#define ARM_SMMU_ID2_IAS GENMASK(3, 0)
#define ARM_SMMU_GR0_ID3 0x2c
#define ARM_SMMU_GR0_ID4 0x30
@ -75,11 +76,11 @@
#define ARM_SMMU_GR0_ID6 0x38
#define ARM_SMMU_GR0_ID7 0x3c
#define ID7_MAJOR GENMASK(7, 4)
#define ID7_MINOR GENMASK(3, 0)
#define ARM_SMMU_ID7_MAJOR GENMASK(7, 4)
#define ARM_SMMU_ID7_MINOR GENMASK(3, 0)
#define ARM_SMMU_GR0_sGFSR 0x48
#define sGFSR_USF BIT(1)
#define ARM_SMMU_sGFSR_USF BIT(1)
#define ARM_SMMU_GR0_sGFSYNR0 0x50
#define ARM_SMMU_GR0_sGFSYNR1 0x54
@ -92,106 +93,132 @@
#define ARM_SMMU_GR0_sTLBGSYNC 0x70
#define ARM_SMMU_GR0_sTLBGSTATUS 0x74
#define sTLBGSTATUS_GSACTIVE BIT(0)
#define ARM_SMMU_sTLBGSTATUS_GSACTIVE BIT(0)
/* Stream mapping registers */
#define ARM_SMMU_GR0_SMR(n) (0x800 + ((n) << 2))
#define SMR_VALID BIT(31)
#define SMR_MASK GENMASK(31, 16)
#define SMR_ID GENMASK(15, 0)
#define ARM_SMMU_SMR_VALID BIT(31)
#define ARM_SMMU_SMR_MASK GENMASK(31, 16)
#define ARM_SMMU_SMR_ID GENMASK(15, 0)
#define ARM_SMMU_GR0_S2CR(n) (0xc00 + ((n) << 2))
#define S2CR_PRIVCFG GENMASK(25, 24)
#define ARM_SMMU_S2CR_PRIVCFG GENMASK(25, 24)
enum arm_smmu_s2cr_privcfg {
S2CR_PRIVCFG_DEFAULT,
S2CR_PRIVCFG_DIPAN,
S2CR_PRIVCFG_UNPRIV,
S2CR_PRIVCFG_PRIV,
};
#define S2CR_TYPE GENMASK(17, 16)
#define ARM_SMMU_S2CR_TYPE GENMASK(17, 16)
enum arm_smmu_s2cr_type {
S2CR_TYPE_TRANS,
S2CR_TYPE_BYPASS,
S2CR_TYPE_FAULT,
};
#define S2CR_EXIDVALID BIT(10)
#define S2CR_CBNDX GENMASK(7, 0)
#define ARM_SMMU_S2CR_EXIDVALID BIT(10)
#define ARM_SMMU_S2CR_CBNDX GENMASK(7, 0)
/* Context bank attribute registers */
#define ARM_SMMU_GR1_CBAR(n) (0x0 + ((n) << 2))
#define CBAR_IRPTNDX GENMASK(31, 24)
#define CBAR_TYPE GENMASK(17, 16)
#define ARM_SMMU_CBAR_IRPTNDX GENMASK(31, 24)
#define ARM_SMMU_CBAR_TYPE GENMASK(17, 16)
enum arm_smmu_cbar_type {
CBAR_TYPE_S2_TRANS,
CBAR_TYPE_S1_TRANS_S2_BYPASS,
CBAR_TYPE_S1_TRANS_S2_FAULT,
CBAR_TYPE_S1_TRANS_S2_TRANS,
};
#define CBAR_S1_MEMATTR GENMASK(15, 12)
#define CBAR_S1_MEMATTR_WB 0xf
#define CBAR_S1_BPSHCFG GENMASK(9, 8)
#define CBAR_S1_BPSHCFG_NSH 3
#define CBAR_VMID GENMASK(7, 0)
#define ARM_SMMU_CBAR_S1_MEMATTR GENMASK(15, 12)
#define ARM_SMMU_CBAR_S1_MEMATTR_WB 0xf
#define ARM_SMMU_CBAR_S1_BPSHCFG GENMASK(9, 8)
#define ARM_SMMU_CBAR_S1_BPSHCFG_NSH 3
#define ARM_SMMU_CBAR_VMID GENMASK(7, 0)
#define ARM_SMMU_GR1_CBFRSYNRA(n) (0x400 + ((n) << 2))
#define ARM_SMMU_GR1_CBA2R(n) (0x800 + ((n) << 2))
#define CBA2R_VMID16 GENMASK(31, 16)
#define CBA2R_VA64 BIT(0)
#define ARM_SMMU_CBA2R_VMID16 GENMASK(31, 16)
#define ARM_SMMU_CBA2R_VA64 BIT(0)
#define ARM_SMMU_CB_SCTLR 0x0
#define SCTLR_S1_ASIDPNE BIT(12)
#define SCTLR_CFCFG BIT(7)
#define SCTLR_CFIE BIT(6)
#define SCTLR_CFRE BIT(5)
#define SCTLR_E BIT(4)
#define SCTLR_AFE BIT(2)
#define SCTLR_TRE BIT(1)
#define SCTLR_M BIT(0)
#define ARM_SMMU_SCTLR_S1_ASIDPNE BIT(12)
#define ARM_SMMU_SCTLR_CFCFG BIT(7)
#define ARM_SMMU_SCTLR_CFIE BIT(6)
#define ARM_SMMU_SCTLR_CFRE BIT(5)
#define ARM_SMMU_SCTLR_E BIT(4)
#define ARM_SMMU_SCTLR_AFE BIT(2)
#define ARM_SMMU_SCTLR_TRE BIT(1)
#define ARM_SMMU_SCTLR_M BIT(0)
#define ARM_SMMU_CB_ACTLR 0x4
#define ARM_SMMU_CB_RESUME 0x8
#define RESUME_TERMINATE BIT(0)
#define ARM_SMMU_RESUME_TERMINATE BIT(0)
#define ARM_SMMU_CB_TCR2 0x10
#define TCR2_SEP GENMASK(17, 15)
#define TCR2_SEP_UPSTREAM 0x7
#define TCR2_AS BIT(4)
#define ARM_SMMU_TCR2_SEP GENMASK(17, 15)
#define ARM_SMMU_TCR2_SEP_UPSTREAM 0x7
#define ARM_SMMU_TCR2_AS BIT(4)
#define ARM_SMMU_TCR2_PASIZE GENMASK(3, 0)
#define ARM_SMMU_CB_TTBR0 0x20
#define ARM_SMMU_CB_TTBR1 0x28
#define TTBRn_ASID GENMASK_ULL(63, 48)
#define ARM_SMMU_TTBRn_ASID GENMASK_ULL(63, 48)
#define ARM_SMMU_CB_TCR 0x30
#define ARM_SMMU_TCR_EAE BIT(31)
#define ARM_SMMU_TCR_EPD1 BIT(23)
#define ARM_SMMU_TCR_TG0 GENMASK(15, 14)
#define ARM_SMMU_TCR_SH0 GENMASK(13, 12)
#define ARM_SMMU_TCR_ORGN0 GENMASK(11, 10)
#define ARM_SMMU_TCR_IRGN0 GENMASK(9, 8)
#define ARM_SMMU_TCR_T0SZ GENMASK(5, 0)
#define ARM_SMMU_VTCR_RES1 BIT(31)
#define ARM_SMMU_VTCR_PS GENMASK(18, 16)
#define ARM_SMMU_VTCR_TG0 ARM_SMMU_TCR_TG0
#define ARM_SMMU_VTCR_SH0 ARM_SMMU_TCR_SH0
#define ARM_SMMU_VTCR_ORGN0 ARM_SMMU_TCR_ORGN0
#define ARM_SMMU_VTCR_IRGN0 ARM_SMMU_TCR_IRGN0
#define ARM_SMMU_VTCR_SL0 GENMASK(7, 6)
#define ARM_SMMU_VTCR_T0SZ ARM_SMMU_TCR_T0SZ
#define ARM_SMMU_CB_CONTEXTIDR 0x34
#define ARM_SMMU_CB_S1_MAIR0 0x38
#define ARM_SMMU_CB_S1_MAIR1 0x3c
#define ARM_SMMU_CB_PAR 0x50
#define CB_PAR_F BIT(0)
#define ARM_SMMU_CB_PAR_F BIT(0)
#define ARM_SMMU_CB_FSR 0x58
#define FSR_MULTI BIT(31)
#define FSR_SS BIT(30)
#define FSR_UUT BIT(8)
#define FSR_ASF BIT(7)
#define FSR_TLBLKF BIT(6)
#define FSR_TLBMCF BIT(5)
#define FSR_EF BIT(4)
#define FSR_PF BIT(3)
#define FSR_AFF BIT(2)
#define FSR_TF BIT(1)
#define ARM_SMMU_FSR_MULTI BIT(31)
#define ARM_SMMU_FSR_SS BIT(30)
#define ARM_SMMU_FSR_UUT BIT(8)
#define ARM_SMMU_FSR_ASF BIT(7)
#define ARM_SMMU_FSR_TLBLKF BIT(6)
#define ARM_SMMU_FSR_TLBMCF BIT(5)
#define ARM_SMMU_FSR_EF BIT(4)
#define ARM_SMMU_FSR_PF BIT(3)
#define ARM_SMMU_FSR_AFF BIT(2)
#define ARM_SMMU_FSR_TF BIT(1)
#define FSR_IGN (FSR_AFF | FSR_ASF | \
FSR_TLBMCF | FSR_TLBLKF)
#define FSR_FAULT (FSR_MULTI | FSR_SS | FSR_UUT | \
FSR_EF | FSR_PF | FSR_TF | FSR_IGN)
#define ARM_SMMU_FSR_IGN (ARM_SMMU_FSR_AFF | \
ARM_SMMU_FSR_ASF | \
ARM_SMMU_FSR_TLBMCF | \
ARM_SMMU_FSR_TLBLKF)
#define ARM_SMMU_FSR_FAULT (ARM_SMMU_FSR_MULTI | \
ARM_SMMU_FSR_SS | \
ARM_SMMU_FSR_UUT | \
ARM_SMMU_FSR_EF | \
ARM_SMMU_FSR_PF | \
ARM_SMMU_FSR_TF | \
ARM_SMMU_FSR_IGN)
#define ARM_SMMU_CB_FAR 0x60
#define ARM_SMMU_CB_FSYNR0 0x68
#define FSYNR0_WNR BIT(4)
#define ARM_SMMU_FSYNR0_WNR BIT(4)
#define ARM_SMMU_CB_S1_TLBIVA 0x600
#define ARM_SMMU_CB_S1_TLBIASID 0x610
@ -203,7 +230,7 @@ enum arm_smmu_cbar_type {
#define ARM_SMMU_CB_ATS1PR 0x800
#define ARM_SMMU_CB_ATSR 0x8f0
#define ATSR_ACTIVE BIT(0)
#define ARM_SMMU_ATSR_ACTIVE BIT(0)
/* Maximum number of context banks per SMMU */
@ -297,7 +324,7 @@ struct arm_smmu_cfg {
enum arm_smmu_cbar_type cbar;
enum arm_smmu_context_fmt fmt;
};
#define INVALID_IRPTNDX 0xff
#define ARM_SMMU_INVALID_IRPTNDX 0xff
enum arm_smmu_domain_stage {
ARM_SMMU_DOMAIN_S1 = 0,
@ -318,6 +345,33 @@ struct arm_smmu_domain {
struct iommu_domain domain;
};
static inline u32 arm_smmu_lpae_tcr(struct io_pgtable_cfg *cfg)
{
return ARM_SMMU_TCR_EPD1 |
FIELD_PREP(ARM_SMMU_TCR_TG0, cfg->arm_lpae_s1_cfg.tcr.tg) |
FIELD_PREP(ARM_SMMU_TCR_SH0, cfg->arm_lpae_s1_cfg.tcr.sh) |
FIELD_PREP(ARM_SMMU_TCR_ORGN0, cfg->arm_lpae_s1_cfg.tcr.orgn) |
FIELD_PREP(ARM_SMMU_TCR_IRGN0, cfg->arm_lpae_s1_cfg.tcr.irgn) |
FIELD_PREP(ARM_SMMU_TCR_T0SZ, cfg->arm_lpae_s1_cfg.tcr.tsz);
}
static inline u32 arm_smmu_lpae_tcr2(struct io_pgtable_cfg *cfg)
{
return FIELD_PREP(ARM_SMMU_TCR2_PASIZE, cfg->arm_lpae_s1_cfg.tcr.ips) |
FIELD_PREP(ARM_SMMU_TCR2_SEP, ARM_SMMU_TCR2_SEP_UPSTREAM);
}
static inline u32 arm_smmu_lpae_vtcr(struct io_pgtable_cfg *cfg)
{
return ARM_SMMU_VTCR_RES1 |
FIELD_PREP(ARM_SMMU_VTCR_PS, cfg->arm_lpae_s2_cfg.vtcr.ps) |
FIELD_PREP(ARM_SMMU_VTCR_TG0, cfg->arm_lpae_s2_cfg.vtcr.tg) |
FIELD_PREP(ARM_SMMU_VTCR_SH0, cfg->arm_lpae_s2_cfg.vtcr.sh) |
FIELD_PREP(ARM_SMMU_VTCR_ORGN0, cfg->arm_lpae_s2_cfg.vtcr.orgn) |
FIELD_PREP(ARM_SMMU_VTCR_IRGN0, cfg->arm_lpae_s2_cfg.vtcr.irgn) |
FIELD_PREP(ARM_SMMU_VTCR_SL0, cfg->arm_lpae_s2_cfg.vtcr.sl) |
FIELD_PREP(ARM_SMMU_VTCR_T0SZ, cfg->arm_lpae_s2_cfg.vtcr.tsz);
}
/* Implementation details, yay! */
struct arm_smmu_impl {

44
drivers/iommu/dmar.c
View File

@ -244,7 +244,7 @@ int dmar_insert_dev_scope(struct dmar_pci_notify_info *info,
info->dev->hdr_type != PCI_HEADER_TYPE_NORMAL) ||
(scope->entry_type == ACPI_DMAR_SCOPE_TYPE_BRIDGE &&
(info->dev->hdr_type == PCI_HEADER_TYPE_NORMAL &&
info->dev->class >> 8 != PCI_CLASS_BRIDGE_OTHER))) {
info->dev->class >> 16 != PCI_BASE_CLASS_BRIDGE))) {
pr_warn("Device scope type does not match for %s\n",
pci_name(info->dev));
return -EINVAL;
@ -1354,7 +1354,6 @@ void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 pfsid,
struct qi_desc desc;
if (mask) {
WARN_ON_ONCE(addr & ((1ULL << (VTD_PAGE_SHIFT + mask)) - 1));
addr |= (1ULL << (VTD_PAGE_SHIFT + mask - 1)) - 1;
desc.qw1 = QI_DEV_IOTLB_ADDR(addr) | QI_DEV_IOTLB_SIZE;
} else
@ -1371,6 +1370,47 @@ void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 pfsid,
qi_submit_sync(&desc, iommu);
}
/* PASID-based IOTLB invalidation */
void qi_flush_piotlb(struct intel_iommu *iommu, u16 did, u32 pasid, u64 addr,
unsigned long npages, bool ih)
{
struct qi_desc desc = {.qw2 = 0, .qw3 = 0};
/*
* npages == -1 means a PASID-selective invalidation, otherwise,
* a positive value for Page-selective-within-PASID invalidation.
* 0 is not a valid input.
*/
if (WARN_ON(!npages)) {
pr_err("Invalid input npages = %ld\n", npages);
return;
}
if (npages == -1) {
desc.qw0 = QI_EIOTLB_PASID(pasid) |
QI_EIOTLB_DID(did) |
QI_EIOTLB_GRAN(QI_GRAN_NONG_PASID) |
QI_EIOTLB_TYPE;
desc.qw1 = 0;
} else {
int mask = ilog2(__roundup_pow_of_two(npages));
unsigned long align = (1ULL << (VTD_PAGE_SHIFT + mask));
if (WARN_ON_ONCE(!ALIGN(addr, align)))
addr &= ~(align - 1);
desc.qw0 = QI_EIOTLB_PASID(pasid) |
QI_EIOTLB_DID(did) |
QI_EIOTLB_GRAN(QI_GRAN_PSI_PASID) |
QI_EIOTLB_TYPE;
desc.qw1 = QI_EIOTLB_ADDR(addr) |
QI_EIOTLB_IH(ih) |
QI_EIOTLB_AM(mask);
}
qi_submit_sync(&desc, iommu);
}
/*
* Disable Queued Invalidation interface.
*/

75
drivers/iommu/intel-iommu-debugfs.c
View File

@ -5,6 +5,7 @@
* Authors: Gayatri Kammela <gayatri.kammela@intel.com>
* Sohil Mehta <sohil.mehta@intel.com>
* Jacob Pan <jacob.jun.pan@linux.intel.com>
* Lu Baolu <baolu.lu@linux.intel.com>
*/
#include <linux/debugfs.h>
@ -283,6 +284,77 @@ static int dmar_translation_struct_show(struct seq_file *m, void *unused)
}
DEFINE_SHOW_ATTRIBUTE(dmar_translation_struct);
static inline unsigned long level_to_directory_size(int level)
{
return BIT_ULL(VTD_PAGE_SHIFT + VTD_STRIDE_SHIFT * (level - 1));
}
static inline void
dump_page_info(struct seq_file *m, unsigned long iova, u64 *path)
{
seq_printf(m, "0x%013lx |\t0x%016llx\t0x%016llx\t0x%016llx\t0x%016llx\t0x%016llx\n",
iova >> VTD_PAGE_SHIFT, path[5], path[4],
path[3], path[2], path[1]);
}
static void pgtable_walk_level(struct seq_file *m, struct dma_pte *pde,
int level, unsigned long start,
u64 *path)
{
int i;
if (level > 5 || level < 1)
return;
for (i = 0; i < BIT_ULL(VTD_STRIDE_SHIFT);
i++, pde++, start += level_to_directory_size(level)) {
if (!dma_pte_present(pde))
continue;
path[level] = pde->val;
if (dma_pte_superpage(pde) || level == 1)
dump_page_info(m, start, path);
else
pgtable_walk_level(m, phys_to_virt(dma_pte_addr(pde)),
level - 1, start, path);
path[level] = 0;
}
}
static int show_device_domain_translation(struct device *dev, void *data)
{
struct dmar_domain *domain = find_domain(dev);
struct seq_file *m = data;
u64 path[6] = { 0 };
if (!domain)
return 0;
seq_printf(m, "Device %s with pasid %d @0x%llx\n",
dev_name(dev), domain->default_pasid,
(u64)virt_to_phys(domain->pgd));
seq_puts(m, "IOVA_PFN\t\tPML5E\t\t\tPML4E\t\t\tPDPE\t\t\tPDE\t\t\tPTE\n");
pgtable_walk_level(m, domain->pgd, domain->agaw + 2, 0, path);
seq_putc(m, '\n');
return 0;
}
static int domain_translation_struct_show(struct seq_file *m, void *unused)
{
unsigned long flags;
int ret;
spin_lock_irqsave(&device_domain_lock, flags);
ret = bus_for_each_dev(&pci_bus_type, NULL, m,
show_device_domain_translation);
spin_unlock_irqrestore(&device_domain_lock, flags);
return ret;
}
DEFINE_SHOW_ATTRIBUTE(domain_translation_struct);
#ifdef CONFIG_IRQ_REMAP
static void ir_tbl_remap_entry_show(struct seq_file *m,
struct intel_iommu *iommu)
@ -396,6 +468,9 @@ void __init intel_iommu_debugfs_init(void)
&iommu_regset_fops);
debugfs_create_file("dmar_translation_struct", 0444, intel_iommu_debug,
NULL, &dmar_translation_struct_fops);
debugfs_create_file("domain_translation_struct", 0444,
intel_iommu_debug, NULL,
&domain_translation_struct_fops);
#ifdef CONFIG_IRQ_REMAP
debugfs_create_file("ir_translation_struct", 0444, intel_iommu_debug,
NULL, &ir_translation_struct_fops);

366
drivers/iommu/intel-iommu.c
View File

@ -307,6 +307,20 @@ static int hw_pass_through = 1;
*/
#define DOMAIN_FLAG_LOSE_CHILDREN BIT(1)
/*
* When VT-d works in the scalable mode, it allows DMA translation to
* happen through either first level or second level page table. This
* bit marks that the DMA translation for the domain goes through the
* first level page table, otherwise, it goes through the second level.
*/
#define DOMAIN_FLAG_USE_FIRST_LEVEL BIT(2)
/*
* Domain represents a virtual machine which demands iommu nested
* translation mode support.
*/
#define DOMAIN_FLAG_NESTING_MODE BIT(3)
#define for_each_domain_iommu(idx, domain) \
for (idx = 0; idx < g_num_of_iommus; idx++) \
if (domain->iommu_refcnt[idx])
@ -355,9 +369,14 @@ static phys_addr_t intel_iommu_iova_to_phys(struct iommu_domain *domain,
int dmar_disabled = 0;
#else
int dmar_disabled = 1;
#endif /*CONFIG_INTEL_IOMMU_DEFAULT_ON*/
#endif /* CONFIG_INTEL_IOMMU_DEFAULT_ON */
#ifdef INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON
int intel_iommu_sm = 1;
#else
int intel_iommu_sm;
#endif /* INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON */
int intel_iommu_enabled = 0;
EXPORT_SYMBOL_GPL(intel_iommu_enabled);
@ -368,7 +387,6 @@ static int intel_iommu_superpage = 1;
static int iommu_identity_mapping;
static int intel_no_bounce;
#define IDENTMAP_ALL 1
#define IDENTMAP_GFX 2
#define IDENTMAP_AZALIA 4
@ -377,7 +395,7 @@ EXPORT_SYMBOL_GPL(intel_iommu_gfx_mapped);
#define DUMMY_DEVICE_DOMAIN_INFO ((struct device_domain_info *)(-1))
#define DEFER_DEVICE_DOMAIN_INFO ((struct device_domain_info *)(-2))
static DEFINE_SPINLOCK(device_domain_lock);
DEFINE_SPINLOCK(device_domain_lock);
static LIST_HEAD(device_domain_list);
#define device_needs_bounce(d) (!intel_no_bounce && dev_is_pci(d) && \
@ -552,6 +570,11 @@ static inline int domain_type_is_si(struct dmar_domain *domain)
return domain->flags & DOMAIN_FLAG_STATIC_IDENTITY;
}
static inline bool domain_use_first_level(struct dmar_domain *domain)
{
return domain->flags & DOMAIN_FLAG_USE_FIRST_LEVEL;
}
static inline int domain_pfn_supported(struct dmar_domain *domain,
unsigned long pfn)
{
@ -661,11 +684,12 @@ static int domain_update_iommu_snooping(struct intel_iommu *skip)
return ret;
}
static int domain_update_iommu_superpage(struct intel_iommu *skip)
static int domain_update_iommu_superpage(struct dmar_domain *domain,
struct intel_iommu *skip)
{
struct dmar_drhd_unit *drhd;
struct intel_iommu *iommu;
int mask = 0xf;
int mask = 0x3;
if (!intel_iommu_superpage) {
return 0;
@ -675,7 +699,13 @@ static int domain_update_iommu_superpage(struct intel_iommu *skip)
rcu_read_lock();
for_each_active_iommu(iommu, drhd) {
if (iommu != skip) {
mask &= cap_super_page_val(iommu->cap);
if (domain && domain_use_first_level(domain)) {
if (!cap_fl1gp_support(iommu->cap))
mask = 0x1;
} else {
mask &= cap_super_page_val(iommu->cap);
}
if (!mask)
break;
}
@ -690,7 +720,7 @@ static void domain_update_iommu_cap(struct dmar_domain *domain)
{
domain_update_iommu_coherency(domain);
domain->iommu_snooping = domain_update_iommu_snooping(NULL);
domain->iommu_superpage = domain_update_iommu_superpage(NULL);
domain->iommu_superpage = domain_update_iommu_superpage(domain, NULL);
}
struct context_entry *iommu_context_addr(struct intel_iommu *iommu, u8 bus,
@ -907,6 +937,8 @@ static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain,
domain_flush_cache(domain, tmp_page, VTD_PAGE_SIZE);
pteval = ((uint64_t)virt_to_dma_pfn(tmp_page) << VTD_PAGE_SHIFT) | DMA_PTE_READ | DMA_PTE_WRITE;
if (domain_use_first_level(domain))
pteval |= DMA_FL_PTE_XD;
if (cmpxchg64(&pte->val, 0ULL, pteval))
/* Someone else set it while we were thinking; use theirs. */
free_pgtable_page(tmp_page);
@ -1477,6 +1509,20 @@ static void iommu_flush_dev_iotlb(struct dmar_domain *domain,
spin_unlock_irqrestore(&device_domain_lock, flags);
}
static void domain_flush_piotlb(struct intel_iommu *iommu,
struct dmar_domain *domain,
u64 addr, unsigned long npages, bool ih)
{
u16 did = domain->iommu_did[iommu->seq_id];
if (domain->default_pasid)
qi_flush_piotlb(iommu, did, domain->default_pasid,
addr, npages, ih);
if (!list_empty(&domain->devices))
qi_flush_piotlb(iommu, did, PASID_RID2PASID, addr, npages, ih);
}
static void iommu_flush_iotlb_psi(struct intel_iommu *iommu,
struct dmar_domain *domain,
unsigned long pfn, unsigned int pages,
@ -1490,18 +1536,23 @@ static void iommu_flush_iotlb_psi(struct intel_iommu *iommu,
if (ih)
ih = 1 << 6;
/*
* Fallback to domain selective flush if no PSI support or the size is
* too big.
* PSI requires page size to be 2 ^ x, and the base address is naturally
* aligned to the size
*/
if (!cap_pgsel_inv(iommu->cap) || mask > cap_max_amask_val(iommu->cap))
iommu->flush.flush_iotlb(iommu, did, 0, 0,
DMA_TLB_DSI_FLUSH);
else
iommu->flush.flush_iotlb(iommu, did, addr | ih, mask,
DMA_TLB_PSI_FLUSH);
if (domain_use_first_level(domain)) {
domain_flush_piotlb(iommu, domain, addr, pages, ih);
} else {
/*
* Fallback to domain selective flush if no PSI support or
* the size is too big. PSI requires page size to be 2 ^ x,
* and the base address is naturally aligned to the size.
*/
if (!cap_pgsel_inv(iommu->cap) ||
mask > cap_max_amask_val(iommu->cap))
iommu->flush.flush_iotlb(iommu, did, 0, 0,
DMA_TLB_DSI_FLUSH);
else
iommu->flush.flush_iotlb(iommu, did, addr | ih, mask,
DMA_TLB_PSI_FLUSH);
}
/*
* In caching mode, changes of pages from non-present to present require
@ -1516,8 +1567,11 @@ static inline void __mapping_notify_one(struct intel_iommu *iommu,
struct dmar_domain *domain,
unsigned long pfn, unsigned int pages)
{
/* It's a non-present to present mapping. Only flush if caching mode */
if (cap_caching_mode(iommu->cap))
/*
* It's a non-present to present mapping. Only flush if caching mode
* and second level.
*/
if (cap_caching_mode(iommu->cap) && !domain_use_first_level(domain))
iommu_flush_iotlb_psi(iommu, domain, pfn, pages, 0, 1);
else
iommu_flush_write_buffer(iommu);
@ -1534,7 +1588,11 @@ static void iommu_flush_iova(struct iova_domain *iovad)
struct intel_iommu *iommu = g_iommus[idx];
u16 did = domain->iommu_did[iommu->seq_id];
iommu->flush.flush_iotlb(iommu, did, 0, 0, DMA_TLB_DSI_FLUSH);
if (domain_use_first_level(domain))
domain_flush_piotlb(iommu, domain, 0, -1, 0);
else
iommu->flush.flush_iotlb(iommu, did, 0, 0,
DMA_TLB_DSI_FLUSH);
if (!cap_caching_mode(iommu->cap))
iommu_flush_dev_iotlb(get_iommu_domain(iommu, did),
@ -1703,6 +1761,33 @@ static void free_dmar_iommu(struct intel_iommu *iommu)
#endif
}
/*
* Check and return whether first level is used by default for
* DMA translation.
*/
static bool first_level_by_default(void)
{
struct dmar_drhd_unit *drhd;
struct intel_iommu *iommu;
static int first_level_support = -1;
if (likely(first_level_support != -1))
return first_level_support;
first_level_support = 1;
rcu_read_lock();
for_each_active_iommu(iommu, drhd) {
if (!sm_supported(iommu) || !ecap_flts(iommu->ecap)) {
first_level_support = 0;
break;
}
}
rcu_read_unlock();
return first_level_support;
}
static struct dmar_domain *alloc_domain(int flags)
{
struct dmar_domain *domain;
@ -1714,6 +1799,8 @@ static struct dmar_domain *alloc_domain(int flags)
memset(domain, 0, sizeof(*domain));
domain->nid = NUMA_NO_NODE;
domain->flags = flags;
if (first_level_by_default())
domain->flags |= DOMAIN_FLAG_USE_FIRST_LEVEL;
domain->has_iotlb_device = false;
INIT_LIST_HEAD(&domain->devices);
@ -1843,14 +1930,16 @@ static int domain_init(struct dmar_domain *domain, struct intel_iommu *iommu,
{
int adjust_width, agaw;
unsigned long sagaw;
int err;
int ret;
init_iova_domain(&domain->iovad, VTD_PAGE_SIZE, IOVA_START_PFN);
err = init_iova_flush_queue(&domain->iovad,
iommu_flush_iova, iova_entry_free);
if (err)
return err;
if (!intel_iommu_strict) {
ret = init_iova_flush_queue(&domain->iovad,
iommu_flush_iova, iova_entry_free);
if (ret)
pr_info("iova flush queue initialization failed\n");
}
domain_reserve_special_ranges(domain);
@ -2223,17 +2312,20 @@ static int __domain_mapping(struct dmar_domain *domain, unsigned long iov_pfn,
unsigned long sg_res = 0;
unsigned int largepage_lvl = 0;
unsigned long lvl_pages = 0;
u64 attr;
BUG_ON(!domain_pfn_supported(domain, iov_pfn + nr_pages - 1));
if ((prot & (DMA_PTE_READ|DMA_PTE_WRITE)) == 0)
return -EINVAL;
prot &= DMA_PTE_READ | DMA_PTE_WRITE | DMA_PTE_SNP;
attr = prot & (DMA_PTE_READ | DMA_PTE_WRITE | DMA_PTE_SNP);
if (domain_use_first_level(domain))
attr |= DMA_FL_PTE_PRESENT | DMA_FL_PTE_XD;
if (!sg) {
sg_res = nr_pages;
pteval = ((phys_addr_t)phys_pfn << VTD_PAGE_SHIFT) | prot;
pteval = ((phys_addr_t)phys_pfn << VTD_PAGE_SHIFT) | attr;
}
while (nr_pages > 0) {
@ -2245,7 +2337,7 @@ static int __domain_mapping(struct dmar_domain *domain, unsigned long iov_pfn,
sg_res = aligned_nrpages(sg->offset, sg->length);
sg->dma_address = ((dma_addr_t)iov_pfn << VTD_PAGE_SHIFT) + pgoff;
sg->dma_length = sg->length;
pteval = (sg_phys(sg) - pgoff) | prot;
pteval = (sg_phys(sg) - pgoff) | attr;
phys_pfn = pteval >> VTD_PAGE_SHIFT;
}
@ -2414,7 +2506,7 @@ static void domain_remove_dev_info(struct dmar_domain *domain)
spin_unlock_irqrestore(&device_domain_lock, flags);
}
static struct dmar_domain *find_domain(struct device *dev)
struct dmar_domain *find_domain(struct device *dev)
{
struct device_domain_info *info;
@ -2460,6 +2552,36 @@ dmar_search_domain_by_dev_info(int segment, int bus, int devfn)
return NULL;
}
static int domain_setup_first_level(struct intel_iommu *iommu,
struct dmar_domain *domain,
struct device *dev,
int pasid)
{
int flags = PASID_FLAG_SUPERVISOR_MODE;
struct dma_pte *pgd = domain->pgd;
int agaw, level;
/*
* Skip top levels of page tables for iommu which has
* less agaw than default. Unnecessary for PT mode.
*/
for (agaw = domain->agaw; agaw > iommu->agaw; agaw--) {
pgd = phys_to_virt(dma_pte_addr(pgd));
if (!dma_pte_present(pgd))
return -ENOMEM;
}
level = agaw_to_level(agaw);
if (level != 4 && level != 5)
return -EINVAL;
flags |= (level == 5) ? PASID_FLAG_FL5LP : 0;
return intel_pasid_setup_first_level(iommu, dev, (pgd_t *)pgd, pasid,
domain->iommu_did[iommu->seq_id],
flags);
}
static struct dmar_domain *dmar_insert_one_dev_info(struct intel_iommu *iommu,
int bus, int devfn,
struct device *dev,
@ -2559,6 +2681,9 @@ static struct dmar_domain *dmar_insert_one_dev_info(struct intel_iommu *iommu,
if (hw_pass_through && domain_type_is_si(domain))
ret = intel_pasid_setup_pass_through(iommu, domain,
dev, PASID_RID2PASID);
else if (domain_use_first_level(domain))
ret = domain_setup_first_level(iommu, domain, dev,
PASID_RID2PASID);
else
ret = intel_pasid_setup_second_level(iommu, domain,
dev, PASID_RID2PASID);
@ -2764,10 +2889,8 @@ static int __init si_domain_init(int hw)
}
/*
* Normally we use DMA domains for devices which have RMRRs. But we
* loose this requirement for graphic and usb devices. Identity map
* the RMRRs for graphic and USB devices so that they could use the
* si_domain.
* Identity map the RMRRs so that devices with RMRRs could also use
* the si_domain.
*/
for_each_rmrr_units(rmrr) {
for_each_active_dev_scope(rmrr->devices, rmrr->devices_cnt,
@ -2775,9 +2898,6 @@ static int __init si_domain_init(int hw)
unsigned long long start = rmrr->base_address;
unsigned long long end = rmrr->end_address;
if (device_is_rmrr_locked(dev))
continue;
if (WARN_ON(end < start ||
end >> agaw_to_width(si_domain->agaw)))
continue;
@ -2916,9 +3036,6 @@ static int device_def_domain_type(struct device *dev)
if (dev_is_pci(dev)) {
struct pci_dev *pdev = to_pci_dev(dev);
if (device_is_rmrr_locked(dev))
return IOMMU_DOMAIN_DMA;
/*
* Prevent any device marked as untrusted from getting
* placed into the statically identity mapping domain.
@ -2956,13 +3073,9 @@ static int device_def_domain_type(struct device *dev)
return IOMMU_DOMAIN_DMA;
} else if (pci_pcie_type(pdev) == PCI_EXP_TYPE_PCI_BRIDGE)
return IOMMU_DOMAIN_DMA;
} else {
if (device_has_rmrr(dev))
return IOMMU_DOMAIN_DMA;
}
return (iommu_identity_mapping & IDENTMAP_ALL) ?
IOMMU_DOMAIN_IDENTITY : 0;
return 0;
}
static void intel_iommu_init_qi(struct intel_iommu *iommu)
@ -3291,10 +3404,7 @@ static int __init init_dmars(void)
if (!ecap_pass_through(iommu->ecap))
hw_pass_through = 0;
#ifdef CONFIG_INTEL_IOMMU_SVM
if (pasid_supported(iommu))
intel_svm_init(iommu);
#endif
intel_svm_check(iommu);
}
/*
@ -3309,9 +3419,6 @@ static int __init init_dmars(void)
iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH);
}
if (iommu_default_passthrough())
iommu_identity_mapping |= IDENTMAP_ALL;
#ifdef CONFIG_INTEL_IOMMU_BROKEN_GFX_WA
dmar_map_gfx = 0;
#endif
@ -3384,8 +3491,21 @@ static unsigned long intel_alloc_iova(struct device *dev,
{
unsigned long iova_pfn;
/* Restrict dma_mask to the width that the iommu can handle */
dma_mask = min_t(uint64_t, DOMAIN_MAX_ADDR(domain->gaw), dma_mask);
/*
* Restrict dma_mask to the width that the iommu can handle.
* First-level translation restricts the input-address to a
* canonical address (i.e., address bits 63:N have the same
* value as address bit [N-1], where N is 48-bits with 4-level
* paging and 57-bits with 5-level paging). Hence, skip bit
* [N-1].
*/
if (domain_use_first_level(domain))
dma_mask = min_t(uint64_t, DOMAIN_MAX_ADDR(domain->gaw - 1),
dma_mask);
else
dma_mask = min_t(uint64_t, DOMAIN_MAX_ADDR(domain->gaw),
dma_mask);
/* Ensure we reserve the whole size-aligned region */
nrpages = __roundup_pow_of_two(nrpages);
@ -3403,7 +3523,8 @@ static unsigned long intel_alloc_iova(struct device *dev,
iova_pfn = alloc_iova_fast(&domain->iovad, nrpages,
IOVA_PFN(dma_mask), true);
if (unlikely(!iova_pfn)) {
dev_err(dev, "Allocating %ld-page iova failed", nrpages);
dev_err_once(dev, "Allocating %ld-page iova failed\n",
nrpages);
return 0;
}
@ -3771,8 +3892,8 @@ static int intel_map_sg(struct device *dev, struct scatterlist *sglist, int nele
return 0;
}
trace_map_sg(dev, iova_pfn << PAGE_SHIFT,
sg_phys(sglist), size << VTD_PAGE_SHIFT);
for_each_sg(sglist, sg, nelems, i)
trace_map_sg(dev, i + 1, nelems, sg);
return nelems;
}
@ -3984,6 +4105,9 @@ bounce_map_sg(struct device *dev, struct scatterlist *sglist, int nelems,
sg_dma_len(sg) = sg->length;
}
for_each_sg(sglist, sg, nelems, i)
trace_bounce_map_sg(dev, i + 1, nelems, sg);
return nelems;
out_unmap:
@ -4312,16 +4436,31 @@ static void __init init_iommu_pm_ops(void)
static inline void init_iommu_pm_ops(void) {}
#endif /* CONFIG_PM */
static int rmrr_sanity_check(struct acpi_dmar_reserved_memory *rmrr)
{
if (!IS_ALIGNED(rmrr->base_address, PAGE_SIZE) ||
!IS_ALIGNED(rmrr->end_address + 1, PAGE_SIZE) ||
rmrr->end_address <= rmrr->base_address ||
arch_rmrr_sanity_check(rmrr))
return -EINVAL;
return 0;
}
int __init dmar_parse_one_rmrr(struct acpi_dmar_header *header, void *arg)
{
struct acpi_dmar_reserved_memory *rmrr;
struct dmar_rmrr_unit *rmrru;
int ret;
rmrr = (struct acpi_dmar_reserved_memory *)header;
ret = arch_rmrr_sanity_check(rmrr);
if (ret)
return ret;
if (rmrr_sanity_check(rmrr))
WARN_TAINT(1, TAINT_FIRMWARE_WORKAROUND,
"Your BIOS is broken; bad RMRR [%#018Lx-%#018Lx]\n"
"BIOS vendor: %s; Ver: %s; Product Version: %s\n",
rmrr->base_address, rmrr->end_address,
dmi_get_system_info(DMI_BIOS_VENDOR),
dmi_get_system_info(DMI_BIOS_VERSION),
dmi_get_system_info(DMI_PRODUCT_VERSION));
rmrru = kzalloc(sizeof(*rmrru), GFP_KERNEL);
if (!rmrru)
@ -4467,7 +4606,7 @@ static int intel_iommu_add(struct dmar_drhd_unit *dmaru)
iommu->name);
return -ENXIO;
}
sp = domain_update_iommu_superpage(iommu) - 1;
sp = domain_update_iommu_superpage(NULL, iommu) - 1;
if (sp >= 0 && !(cap_super_page_val(iommu->cap) & (1 << sp))) {
pr_warn("%s: Doesn't support large page.\n",
iommu->name);
@ -4487,10 +4626,7 @@ static int intel_iommu_add(struct dmar_drhd_unit *dmaru)
if (ret)
goto out;
#ifdef CONFIG_INTEL_IOMMU_SVM
if (pasid_supported(iommu))
intel_svm_init(iommu);
#endif
intel_svm_check(iommu);
if (dmaru->ignored) {
/*
@ -4895,7 +5031,7 @@ static int __init platform_optin_force_iommu(void)
* map for all devices except those marked as being untrusted.
*/
if (dmar_disabled)
iommu_identity_mapping |= IDENTMAP_ALL;
iommu_set_default_passthrough(false);
dmar_disabled = 0;
no_iommu = 0;
@ -5195,6 +5331,7 @@ static struct iommu_domain *intel_iommu_domain_alloc(unsigned type)
{
struct dmar_domain *dmar_domain;
struct iommu_domain *domain;
int ret;
switch (type) {
case IOMMU_DOMAIN_DMA:
@ -5211,11 +5348,12 @@ static struct iommu_domain *intel_iommu_domain_alloc(unsigned type)
return NULL;
}
if (type == IOMMU_DOMAIN_DMA &&
init_iova_flush_queue(&dmar_domain->iovad,
iommu_flush_iova, iova_entry_free)) {
pr_warn("iova flush queue initialization failed\n");
intel_iommu_strict = 1;
if (!intel_iommu_strict && type == IOMMU_DOMAIN_DMA) {
ret = init_iova_flush_queue(&dmar_domain->iovad,
iommu_flush_iova,
iova_entry_free);
if (ret)
pr_info("iova flush queue initialization failed\n");
}
domain_update_iommu_cap(dmar_domain);
@ -5281,7 +5419,7 @@ static void auxiliary_unlink_device(struct dmar_domain *domain,
domain->auxd_refcnt--;
if (!domain->auxd_refcnt && domain->default_pasid > 0)
intel_pasid_free_id(domain->default_pasid);
ioasid_free(domain->default_pasid);
}
static int aux_domain_add_dev(struct dmar_domain *domain,
@ -5299,10 +5437,11 @@ static int aux_domain_add_dev(struct dmar_domain *domain,
if (domain->default_pasid <= 0) {
int pasid;
pasid = intel_pasid_alloc_id(domain, PASID_MIN,
pci_max_pasids(to_pci_dev(dev)),
GFP_KERNEL);
if (pasid <= 0) {
/* No private data needed for the default pasid */
pasid = ioasid_alloc(NULL, PASID_MIN,
pci_max_pasids(to_pci_dev(dev)) - 1,
NULL);
if (pasid == INVALID_IOASID) {
pr_err("Can't allocate default pasid\n");
return -ENODEV;
}
@ -5320,8 +5459,12 @@ static int aux_domain_add_dev(struct dmar_domain *domain,
goto attach_failed;
/* Setup the PASID entry for mediated devices: */
ret = intel_pasid_setup_second_level(iommu, domain, dev,
domain->default_pasid);
if (domain_use_first_level(domain))
ret = domain_setup_first_level(iommu, domain, dev,
domain->default_pasid);
else
ret = intel_pasid_setup_second_level(iommu, domain, dev,
domain->default_pasid);
if (ret)
goto table_failed;
spin_unlock(&iommu->lock);
@ -5338,7 +5481,7 @@ attach_failed:
spin_unlock(&iommu->lock);
spin_unlock_irqrestore(&device_domain_lock, flags);
if (!domain->auxd_refcnt && domain->default_pasid > 0)
intel_pasid_free_id(domain->default_pasid);
ioasid_free(domain->default_pasid);
return ret;
}
@ -5592,6 +5735,24 @@ static inline bool iommu_pasid_support(void)
return ret;
}
static inline bool nested_mode_support(void)
{
struct dmar_drhd_unit *drhd;
struct intel_iommu *iommu;
bool ret = true;
rcu_read_lock();
for_each_active_iommu(iommu, drhd) {
if (!sm_supported(iommu) || !ecap_nest(iommu->ecap)) {
ret = false;
break;
}
}
rcu_read_unlock();
return ret;
}
static bool intel_iommu_capable(enum iommu_cap cap)
{
if (cap == IOMMU_CAP_CACHE_COHERENCY)
@ -5749,15 +5910,6 @@ static void intel_iommu_get_resv_regions(struct device *device,
list_add_tail(&reg->list, head);
}
static void intel_iommu_put_resv_regions(struct device *dev,
struct list_head *head)
{
struct iommu_resv_region *entry, *next;
list_for_each_entry_safe(entry, next, head, list)
kfree(entry);
}
int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct device *dev)
{
struct device_domain_info *info;
@ -5984,10 +6136,42 @@ static bool intel_iommu_is_attach_deferred(struct iommu_domain *domain,
return dev->archdata.iommu == DEFER_DEVICE_DOMAIN_INFO;
}
static int
intel_iommu_domain_set_attr(struct iommu_domain *domain,
enum iommu_attr attr, void *data)
{
struct dmar_domain *dmar_domain = to_dmar_domain(domain);
unsigned long flags;
int ret = 0;
if (domain->type != IOMMU_DOMAIN_UNMANAGED)
return -EINVAL;
switch (attr) {
case DOMAIN_ATTR_NESTING:
spin_lock_irqsave(&device_domain_lock, flags);
if (nested_mode_support() &&
list_empty(&dmar_domain->devices)) {
dmar_domain->flags |= DOMAIN_FLAG_NESTING_MODE;
dmar_domain->flags &= ~DOMAIN_FLAG_USE_FIRST_LEVEL;
} else {
ret = -ENODEV;
}
spin_unlock_irqrestore(&device_domain_lock, flags);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
const struct iommu_ops intel_iommu_ops = {
.capable = intel_iommu_capable,
.domain_alloc = intel_iommu_domain_alloc,
.domain_free = intel_iommu_domain_free,
.domain_set_attr = intel_iommu_domain_set_attr,
.attach_dev = intel_iommu_attach_device,
.detach_dev = intel_iommu_detach_device,
.aux_attach_dev = intel_iommu_aux_attach_device,
@ -5999,7 +6183,7 @@ const struct iommu_ops intel_iommu_ops = {
.add_device = intel_iommu_add_device,
.remove_device = intel_iommu_remove_device,
.get_resv_regions = intel_iommu_get_resv_regions,
.put_resv_regions = intel_iommu_put_resv_regions,
.put_resv_regions = generic_iommu_put_resv_regions,
.apply_resv_region = intel_iommu_apply_resv_region,
.device_group = intel_iommu_device_group,
.dev_has_feat = intel_iommu_dev_has_feat,

97
drivers/iommu/intel-pasid.c
View File

@ -26,42 +26,6 @@
*/
static DEFINE_SPINLOCK(pasid_lock);
u32 intel_pasid_max_id = PASID_MAX;
static DEFINE_IDR(pasid_idr);
int intel_pasid_alloc_id(void *ptr, int start, int end, gfp_t gfp)
{
int ret, min, max;
min = max_t(int, start, PASID_MIN);
max = min_t(int, end, intel_pasid_max_id);
WARN_ON(in_interrupt());
idr_preload(gfp);
spin_lock(&pasid_lock);
ret = idr_alloc(&pasid_idr, ptr, min, max, GFP_ATOMIC);
spin_unlock(&pasid_lock);
idr_preload_end();
return ret;
}
void intel_pasid_free_id(int pasid)
{
spin_lock(&pasid_lock);
idr_remove(&pasid_idr, pasid);
spin_unlock(&pasid_lock);
}
void *intel_pasid_lookup_id(int pasid)
{
void *p;
spin_lock(&pasid_lock);
p = idr_find(&pasid_idr, pasid);
spin_unlock(&pasid_lock);
return p;
}
/*
* Per device pasid table management:
@ -465,6 +429,21 @@ void intel_pasid_tear_down_entry(struct intel_iommu *iommu,
devtlb_invalidation_with_pasid(iommu, dev, pasid);
}
static void pasid_flush_caches(struct intel_iommu *iommu,
struct pasid_entry *pte,
int pasid, u16 did)
{
if (!ecap_coherent(iommu->ecap))
clflush_cache_range(pte, sizeof(*pte));
if (cap_caching_mode(iommu->cap)) {
pasid_cache_invalidation_with_pasid(iommu, did, pasid);
iotlb_invalidation_with_pasid(iommu, did, pasid);
} else {
iommu_flush_write_buffer(iommu);
}
}
/*
* Set up the scalable mode pasid table entry for first only
* translation type.
@ -498,10 +477,15 @@ int intel_pasid_setup_first_level(struct intel_iommu *iommu,
pasid_set_sre(pte);
}
#ifdef CONFIG_X86
if (cpu_feature_enabled(X86_FEATURE_LA57))
pasid_set_flpm(pte, 1);
#endif /* CONFIG_X86 */
if (flags & PASID_FLAG_FL5LP) {
if (cap_5lp_support(iommu->cap)) {
pasid_set_flpm(pte, 1);
} else {
pr_err("No 5-level paging support for first-level\n");
pasid_clear_entry(pte);
return -EINVAL;
}
}
pasid_set_domain_id(pte, did);
pasid_set_address_width(pte, iommu->agaw);
@ -510,16 +494,7 @@ int intel_pasid_setup_first_level(struct intel_iommu *iommu,
/* Setup Present and PASID Granular Transfer Type: */
pasid_set_translation_type(pte, 1);
pasid_set_present(pte);
if (!ecap_coherent(iommu->ecap))
clflush_cache_range(pte, sizeof(*pte));
if (cap_caching_mode(iommu->cap)) {
pasid_cache_invalidation_with_pasid(iommu, did, pasid);
iotlb_invalidation_with_pasid(iommu, did, pasid);
} else {
iommu_flush_write_buffer(iommu);
}
pasid_flush_caches(iommu, pte, pasid, did);
return 0;
}
@ -583,16 +558,7 @@ int intel_pasid_setup_second_level(struct intel_iommu *iommu,
*/
pasid_set_sre(pte);
pasid_set_present(pte);
if (!ecap_coherent(iommu->ecap))
clflush_cache_range(pte, sizeof(*pte));
if (cap_caching_mode(iommu->cap)) {
pasid_cache_invalidation_with_pasid(iommu, did, pasid);
iotlb_invalidation_with_pasid(iommu, did, pasid);
} else {
iommu_flush_write_buffer(iommu);
}
pasid_flush_caches(iommu, pte, pasid, did);
return 0;
}
@ -626,16 +592,7 @@ int intel_pasid_setup_pass_through(struct intel_iommu *iommu,
*/
pasid_set_sre(pte);
pasid_set_present(pte);
if (!ecap_coherent(iommu->ecap))
clflush_cache_range(pte, sizeof(*pte));
if (cap_caching_mode(iommu->cap)) {
pasid_cache_invalidation_with_pasid(iommu, did, pasid);
iotlb_invalidation_with_pasid(iommu, did, pasid);
} else {
iommu_flush_write_buffer(iommu);
}
pasid_flush_caches(iommu, pte, pasid, did);
return 0;
}

6
drivers/iommu/intel-pasid.h
View File

@ -37,6 +37,12 @@
*/
#define PASID_FLAG_SUPERVISOR_MODE BIT(0)
/*
* The PASID_FLAG_FL5LP flag Indicates using 5-level paging for first-
* level translation, otherwise, 4-level paging will be used.
*/
#define PASID_FLAG_FL5LP BIT(1)
struct pasid_dir_entry {
u64 val;
};

167
drivers/iommu/intel-svm.c
View File

@ -17,25 +17,13 @@
#include <linux/dmar.h>
#include <linux/interrupt.h>
#include <linux/mm_types.h>
#include <linux/ioasid.h>
#include <asm/page.h>
#include "intel-pasid.h"
static irqreturn_t prq_event_thread(int irq, void *d);
int intel_svm_init(struct intel_iommu *iommu)
{
if (cpu_feature_enabled(X86_FEATURE_GBPAGES) &&
!cap_fl1gp_support(iommu->cap))
return -EINVAL;
if (cpu_feature_enabled(X86_FEATURE_LA57) &&
!cap_5lp_support(iommu->cap))
return -EINVAL;
return 0;
}
#define PRQ_ORDER 0
int intel_svm_enable_prq(struct intel_iommu *iommu)
@ -99,6 +87,33 @@ int intel_svm_finish_prq(struct intel_iommu *iommu)
return 0;
}
static inline bool intel_svm_capable(struct intel_iommu *iommu)
{
return iommu->flags & VTD_FLAG_SVM_CAPABLE;
}
void intel_svm_check(struct intel_iommu *iommu)
{
if (!pasid_supported(iommu))
return;
if (cpu_feature_enabled(X86_FEATURE_GBPAGES) &&
!cap_fl1gp_support(iommu->cap)) {
pr_err("%s SVM disabled, incompatible 1GB page capability\n",
iommu->name);
return;
}
if (cpu_feature_enabled(X86_FEATURE_LA57) &&
!cap_5lp_support(iommu->cap)) {
pr_err("%s SVM disabled, incompatible paging mode\n",
iommu->name);
return;
}
iommu->flags |= VTD_FLAG_SVM_CAPABLE;
}
static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_dev *sdev,
unsigned long address, unsigned long pages, int ih)
{
@ -207,6 +222,10 @@ static const struct mmu_notifier_ops intel_mmuops = {
static DEFINE_MUTEX(pasid_mutex);
static LIST_HEAD(global_svm_list);
#define for_each_svm_dev(sdev, svm, d) \
list_for_each_entry((sdev), &(svm)->devs, list) \
if ((d) != (sdev)->dev) {} else
int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_ops *ops)
{
struct intel_iommu *iommu = intel_svm_device_to_iommu(dev);
@ -220,6 +239,9 @@ int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_
if (!iommu || dmar_disabled)
return -EINVAL;
if (!intel_svm_capable(iommu))
return -ENOTSUPP;
if (dev_is_pci(dev)) {
pasid_max = pci_max_pasids(to_pci_dev(dev));
if (pasid_max < 0)
@ -252,15 +274,14 @@ int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_
goto out;
}
list_for_each_entry(sdev, &svm->devs, list) {
if (dev == sdev->dev) {
if (sdev->ops != ops) {
ret = -EBUSY;
goto out;
}
sdev->users++;
goto success;
/* Find the matching device in svm list */
for_each_svm_dev(sdev, svm, dev) {
if (sdev->ops != ops) {
ret = -EBUSY;
goto out;
}
sdev->users++;
goto success;
}
break;
@ -314,16 +335,15 @@ int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_
if (pasid_max > intel_pasid_max_id)
pasid_max = intel_pasid_max_id;
/* Do not use PASID 0 in caching mode (virtualised IOMMU) */
ret = intel_pasid_alloc_id(svm,
!!cap_caching_mode(iommu->cap),
pasid_max - 1, GFP_KERNEL);
if (ret < 0) {
/* Do not use PASID 0, reserved for RID to PASID */
svm->pasid = ioasid_alloc(NULL, PASID_MIN,
pasid_max - 1, svm);
if (svm->pasid == INVALID_IOASID) {
kfree(svm);
kfree(sdev);
ret = -ENOSPC;
goto out;
}
svm->pasid = ret;
svm->notifier.ops = &intel_mmuops;
svm->mm = mm;
svm->flags = flags;
@ -333,7 +353,7 @@ int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_
if (mm) {
ret = mmu_notifier_register(&svm->notifier, mm);
if (ret) {
intel_pasid_free_id(svm->pasid);
ioasid_free(svm->pasid);
kfree(svm);
kfree(sdev);
goto out;
@ -344,12 +364,14 @@ int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_
ret = intel_pasid_setup_first_level(iommu, dev,
mm ? mm->pgd : init_mm.pgd,
svm->pasid, FLPT_DEFAULT_DID,
mm ? 0 : PASID_FLAG_SUPERVISOR_MODE);
(mm ? 0 : PASID_FLAG_SUPERVISOR_MODE) |
(cpu_feature_enabled(X86_FEATURE_LA57) ?
PASID_FLAG_FL5LP : 0));
spin_unlock(&iommu->lock);
if (ret) {
if (mm)
mmu_notifier_unregister(&svm->notifier, mm);
intel_pasid_free_id(svm->pasid);
ioasid_free(svm->pasid);
kfree(svm);
kfree(sdev);
goto out;
@ -365,7 +387,9 @@ int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_
ret = intel_pasid_setup_first_level(iommu, dev,
mm ? mm->pgd : init_mm.pgd,
svm->pasid, FLPT_DEFAULT_DID,
mm ? 0 : PASID_FLAG_SUPERVISOR_MODE);
(mm ? 0 : PASID_FLAG_SUPERVISOR_MODE) |
(cpu_feature_enabled(X86_FEATURE_LA57) ?
PASID_FLAG_FL5LP : 0));
spin_unlock(&iommu->lock);
if (ret) {
kfree(sdev);
@ -397,44 +421,45 @@ int intel_svm_unbind_mm(struct device *dev, int pasid)
if (!iommu)
goto out;
svm = intel_pasid_lookup_id(pasid);
svm = ioasid_find(NULL, pasid, NULL);
if (!svm)
goto out;
list_for_each_entry(sdev, &svm->devs, list) {
if (dev == sdev->dev) {
ret = 0;
sdev->users--;
if (!sdev->users) {
list_del_rcu(&sdev->list);
/* Flush the PASID cache and IOTLB for this device.
* Note that we do depend on the hardware *not* using
* the PASID any more. Just as we depend on other
* devices never using PASIDs that they have no right
* to use. We have a *shared* PASID table, because it's
* large and has to be physically contiguous. So it's
* hard to be as defensive as we might like. */
intel_pasid_tear_down_entry(iommu, dev, svm->pasid);
intel_flush_svm_range_dev(svm, sdev, 0, -1, 0);
kfree_rcu(sdev, rcu);
if (IS_ERR(svm)) {
ret = PTR_ERR(svm);
goto out;
}
if (list_empty(&svm->devs)) {
intel_pasid_free_id(svm->pasid);
if (svm->mm)
mmu_notifier_unregister(&svm->notifier, svm->mm);
for_each_svm_dev(sdev, svm, dev) {
ret = 0;
sdev->users--;
if (!sdev->users) {
list_del_rcu(&sdev->list);
/* Flush the PASID cache and IOTLB for this device.
* Note that we do depend on the hardware *not* using
* the PASID any more. Just as we depend on other
* devices never using PASIDs that they have no right
* to use. We have a *shared* PASID table, because it's
* large and has to be physically contiguous. So it's
* hard to be as defensive as we might like. */
intel_pasid_tear_down_entry(iommu, dev, svm->pasid);
intel_flush_svm_range_dev(svm, sdev, 0, -1, 0);
kfree_rcu(sdev, rcu);
list_del(&svm->list);
/* We mandate that no page faults may be outstanding
* for the PASID when intel_svm_unbind_mm() is called.
* If that is not obeyed, subtle errors will happen.
* Let's make them less subtle... */
memset(svm, 0x6b, sizeof(*svm));
kfree(svm);
}
if (list_empty(&svm->devs)) {
ioasid_free(svm->pasid);
if (svm->mm)
mmu_notifier_unregister(&svm->notifier, svm->mm);
list_del(&svm->list);
/* We mandate that no page faults may be outstanding
* for the PASID when intel_svm_unbind_mm() is called.
* If that is not obeyed, subtle errors will happen.
* Let's make them less subtle... */
memset(svm, 0x6b, sizeof(*svm));
kfree(svm);
}
break;
}
break;
}
out:
mutex_unlock(&pasid_mutex);
@ -454,10 +479,14 @@ int intel_svm_is_pasid_valid(struct device *dev, int pasid)
if (!iommu)
goto out;
svm = intel_pasid_lookup_id(pasid);
svm = ioasid_find(NULL, pasid, NULL);
if (!svm)
goto out;
if (IS_ERR(svm)) {
ret = PTR_ERR(svm);
goto out;
}
/* init_mm is used in this case */
if (!svm->mm)
ret = 1;
@ -564,13 +593,12 @@ static irqreturn_t prq_event_thread(int irq, void *d)
if (!svm || svm->pasid != req->pasid) {
rcu_read_lock();
svm = intel_pasid_lookup_id(req->pasid);
svm = ioasid_find(NULL, req->pasid, NULL);
/* It *can't* go away, because the driver is not permitted
* to unbind the mm while any page faults are outstanding.
* So we only need RCU to protect the internal idr code. */
rcu_read_unlock();
if (!svm) {
if (IS_ERR_OR_NULL(svm)) {
pr_err("%s: Page request for invalid PASID %d: %08llx %08llx\n",
iommu->name, req->pasid, ((unsigned long long *)req)[0],
((unsigned long long *)req)[1]);
@ -654,11 +682,10 @@ static irqreturn_t prq_event_thread(int irq, void *d)
if (req->priv_data_present)
memcpy(&resp.qw2, req->priv_data,
sizeof(req->priv_data));
resp.qw2 = 0;
resp.qw3 = 0;
qi_submit_sync(&resp, iommu);
}
resp.qw2 = 0;
resp.qw3 = 0;
qi_submit_sync(&resp, iommu);
head = (head + sizeof(*req)) & PRQ_RING_MASK;
}

22
drivers/iommu/io-pgtable-arm-v7s.c
View File

@ -149,8 +149,6 @@
#define ARM_V7S_TTBR_IRGN_ATTR(attr) \
((((attr) & 0x1) << 6) | (((attr) & 0x2) >> 1))
#define ARM_V7S_TCR_PD1 BIT(5)
#ifdef CONFIG_ZONE_DMA32
#define ARM_V7S_TABLE_GFP_DMA GFP_DMA32
#define ARM_V7S_TABLE_SLAB_FLAGS SLAB_CACHE_DMA32
@ -798,8 +796,8 @@ static struct io_pgtable *arm_v7s_alloc_pgtable(struct io_pgtable_cfg *cfg,
*/
cfg->pgsize_bitmap &= SZ_4K | SZ_64K | SZ_1M | SZ_16M;
/* TCR: T0SZ=0, disable TTBR1 */
cfg->arm_v7s_cfg.tcr = ARM_V7S_TCR_PD1;
/* TCR: T0SZ=0, EAE=0 (if applicable) */
cfg->arm_v7s_cfg.tcr = 0;
/*
* TEX remap: the indices used map to the closest equivalent types
@ -822,15 +820,13 @@ static struct io_pgtable *arm_v7s_alloc_pgtable(struct io_pgtable_cfg *cfg,
/* Ensure the empty pgd is visible before any actual TTBR write */
wmb();
/* TTBRs */
cfg->arm_v7s_cfg.ttbr[0] = virt_to_phys(data->pgd) |
ARM_V7S_TTBR_S | ARM_V7S_TTBR_NOS |
(cfg->coherent_walk ?
(ARM_V7S_TTBR_IRGN_ATTR(ARM_V7S_RGN_WBWA) |
ARM_V7S_TTBR_ORGN_ATTR(ARM_V7S_RGN_WBWA)) :
(ARM_V7S_TTBR_IRGN_ATTR(ARM_V7S_RGN_NC) |
ARM_V7S_TTBR_ORGN_ATTR(ARM_V7S_RGN_NC)));
cfg->arm_v7s_cfg.ttbr[1] = 0;
/* TTBR */
cfg->arm_v7s_cfg.ttbr = virt_to_phys(data->pgd) | ARM_V7S_TTBR_S |
(cfg->coherent_walk ? (ARM_V7S_TTBR_NOS |
ARM_V7S_TTBR_IRGN_ATTR(ARM_V7S_RGN_WBWA) |
ARM_V7S_TTBR_ORGN_ATTR(ARM_V7S_RGN_WBWA)) :
(ARM_V7S_TTBR_IRGN_ATTR(ARM_V7S_RGN_NC) |
ARM_V7S_TTBR_ORGN_ATTR(ARM_V7S_RGN_NC)));
return &data->iop;
out_free_data:

164
drivers/iommu/io-pgtable-arm.c
View File

@ -100,40 +100,29 @@
#define ARM_LPAE_PTE_MEMATTR_DEV (((arm_lpae_iopte)0x1) << 2)
/* Register bits */
#define ARM_32_LPAE_TCR_EAE (1 << 31)
#define ARM_64_LPAE_S2_TCR_RES1 (1 << 31)
#define ARM_LPAE_TCR_TG0_4K 0
#define ARM_LPAE_TCR_TG0_64K 1
#define ARM_LPAE_TCR_TG0_16K 2
#define ARM_LPAE_TCR_EPD1 (1 << 23)
#define ARM_LPAE_TCR_TG1_16K 1
#define ARM_LPAE_TCR_TG1_4K 2
#define ARM_LPAE_TCR_TG1_64K 3
#define ARM_LPAE_TCR_TG0_4K (0 << 14)
#define ARM_LPAE_TCR_TG0_64K (1 << 14)
#define ARM_LPAE_TCR_TG0_16K (2 << 14)
#define ARM_LPAE_TCR_SH0_SHIFT 12
#define ARM_LPAE_TCR_SH0_MASK 0x3
#define ARM_LPAE_TCR_SH_NS 0
#define ARM_LPAE_TCR_SH_OS 2
#define ARM_LPAE_TCR_SH_IS 3
#define ARM_LPAE_TCR_ORGN0_SHIFT 10
#define ARM_LPAE_TCR_IRGN0_SHIFT 8
#define ARM_LPAE_TCR_RGN_MASK 0x3
#define ARM_LPAE_TCR_RGN_NC 0
#define ARM_LPAE_TCR_RGN_WBWA 1
#define ARM_LPAE_TCR_RGN_WT 2
#define ARM_LPAE_TCR_RGN_WB 3
#define ARM_LPAE_TCR_SL0_SHIFT 6
#define ARM_LPAE_TCR_SL0_MASK 0x3
#define ARM_LPAE_VTCR_SL0_MASK 0x3
#define ARM_LPAE_TCR_T0SZ_SHIFT 0
#define ARM_LPAE_TCR_SZ_MASK 0xf
#define ARM_LPAE_TCR_PS_SHIFT 16
#define ARM_LPAE_TCR_PS_MASK 0x7
#define ARM_LPAE_TCR_IPS_SHIFT 32
#define ARM_LPAE_TCR_IPS_MASK 0x7
#define ARM_LPAE_VTCR_PS_SHIFT 16
#define ARM_LPAE_VTCR_PS_MASK 0x7
#define ARM_LPAE_TCR_PS_32_BIT 0x0ULL
#define ARM_LPAE_TCR_PS_36_BIT 0x1ULL
@ -293,17 +282,11 @@ static void __arm_lpae_init_pte(struct arm_lpae_io_pgtable *data,
{
arm_lpae_iopte pte = prot;
if (data->iop.cfg.quirks & IO_PGTABLE_QUIRK_ARM_NS)
pte |= ARM_LPAE_PTE_NS;
if (data->iop.fmt != ARM_MALI_LPAE && lvl == ARM_LPAE_MAX_LEVELS - 1)
pte |= ARM_LPAE_PTE_TYPE_PAGE;
else
pte |= ARM_LPAE_PTE_TYPE_BLOCK;
if (data->iop.fmt != ARM_MALI_LPAE)
pte |= ARM_LPAE_PTE_AF;
pte |= ARM_LPAE_PTE_SH_IS;
pte |= paddr_to_iopte(paddr, data);
__arm_lpae_set_pte(ptep, pte, &data->iop.cfg);
@ -460,9 +443,20 @@ static arm_lpae_iopte arm_lpae_prot_to_pte(struct arm_lpae_io_pgtable *data,
<< ARM_LPAE_PTE_ATTRINDX_SHIFT);
}
if (prot & IOMMU_CACHE)
pte |= ARM_LPAE_PTE_SH_IS;
else
pte |= ARM_LPAE_PTE_SH_OS;
if (prot & IOMMU_NOEXEC)
pte |= ARM_LPAE_PTE_XN;
if (data->iop.cfg.quirks & IO_PGTABLE_QUIRK_ARM_NS)
pte |= ARM_LPAE_PTE_NS;
if (data->iop.fmt != ARM_MALI_LPAE)
pte |= ARM_LPAE_PTE_AF;
return pte;
}
@ -474,6 +468,7 @@ static int arm_lpae_map(struct io_pgtable_ops *ops, unsigned long iova,
arm_lpae_iopte *ptep = data->pgd;
int ret, lvl = data->start_level;
arm_lpae_iopte prot;
long iaext = (long)iova >> cfg->ias;
/* If no access, then nothing to do */
if (!(iommu_prot & (IOMMU_READ | IOMMU_WRITE)))
@ -482,7 +477,9 @@ static int arm_lpae_map(struct io_pgtable_ops *ops, unsigned long iova,
if (WARN_ON(!size || (size & cfg->pgsize_bitmap) != size))
return -EINVAL;
if (WARN_ON(iova >> data->iop.cfg.ias || paddr >> data->iop.cfg.oas))
if (cfg->quirks & IO_PGTABLE_QUIRK_ARM_TTBR1)
iaext = ~iaext;
if (WARN_ON(iaext || paddr >> cfg->oas))
return -ERANGE;
prot = arm_lpae_prot_to_pte(data, iommu_prot);
@ -648,11 +645,14 @@ static size_t arm_lpae_unmap(struct io_pgtable_ops *ops, unsigned long iova,
struct arm_lpae_io_pgtable *data = io_pgtable_ops_to_data(ops);
struct io_pgtable_cfg *cfg = &data->iop.cfg;
arm_lpae_iopte *ptep = data->pgd;
long iaext = (long)iova >> cfg->ias;
if (WARN_ON(!size || (size & cfg->pgsize_bitmap) != size))
return 0;
if (WARN_ON(iova >> data->iop.cfg.ias))
if (cfg->quirks & IO_PGTABLE_QUIRK_ARM_TTBR1)
iaext = ~iaext;
if (WARN_ON(iaext))
return 0;
return __arm_lpae_unmap(data, gather, iova, size, data->start_level, ptep);
@ -787,9 +787,12 @@ arm_64_lpae_alloc_pgtable_s1(struct io_pgtable_cfg *cfg, void *cookie)
{
u64 reg;
struct arm_lpae_io_pgtable *data;
typeof(&cfg->arm_lpae_s1_cfg.tcr) tcr = &cfg->arm_lpae_s1_cfg.tcr;
bool tg1;
if (cfg->quirks & ~(IO_PGTABLE_QUIRK_ARM_NS |
IO_PGTABLE_QUIRK_NON_STRICT))
IO_PGTABLE_QUIRK_NON_STRICT |
IO_PGTABLE_QUIRK_ARM_TTBR1))
return NULL;
data = arm_lpae_alloc_pgtable(cfg);
@ -798,58 +801,55 @@ arm_64_lpae_alloc_pgtable_s1(struct io_pgtable_cfg *cfg, void *cookie)
/* TCR */
if (cfg->coherent_walk) {
reg = (ARM_LPAE_TCR_SH_IS << ARM_LPAE_TCR_SH0_SHIFT) |
(ARM_LPAE_TCR_RGN_WBWA << ARM_LPAE_TCR_IRGN0_SHIFT) |
(ARM_LPAE_TCR_RGN_WBWA << ARM_LPAE_TCR_ORGN0_SHIFT);
tcr->sh = ARM_LPAE_TCR_SH_IS;
tcr->irgn = ARM_LPAE_TCR_RGN_WBWA;
tcr->orgn = ARM_LPAE_TCR_RGN_WBWA;
} else {
reg = (ARM_LPAE_TCR_SH_OS << ARM_LPAE_TCR_SH0_SHIFT) |
(ARM_LPAE_TCR_RGN_NC << ARM_LPAE_TCR_IRGN0_SHIFT) |
(ARM_LPAE_TCR_RGN_NC << ARM_LPAE_TCR_ORGN0_SHIFT);
tcr->sh = ARM_LPAE_TCR_SH_OS;
tcr->irgn = ARM_LPAE_TCR_RGN_NC;
tcr->orgn = ARM_LPAE_TCR_RGN_NC;
}
tg1 = cfg->quirks & IO_PGTABLE_QUIRK_ARM_TTBR1;
switch (ARM_LPAE_GRANULE(data)) {
case SZ_4K:
reg |= ARM_LPAE_TCR_TG0_4K;
tcr->tg = tg1 ? ARM_LPAE_TCR_TG1_4K : ARM_LPAE_TCR_TG0_4K;
break;
case SZ_16K:
reg |= ARM_LPAE_TCR_TG0_16K;
tcr->tg = tg1 ? ARM_LPAE_TCR_TG1_16K : ARM_LPAE_TCR_TG0_16K;
break;
case SZ_64K:
reg |= ARM_LPAE_TCR_TG0_64K;
tcr->tg = tg1 ? ARM_LPAE_TCR_TG1_64K : ARM_LPAE_TCR_TG0_64K;
break;
}
switch (cfg->oas) {
case 32:
reg |= (ARM_LPAE_TCR_PS_32_BIT << ARM_LPAE_TCR_IPS_SHIFT);
tcr->ips = ARM_LPAE_TCR_PS_32_BIT;
break;
case 36:
reg |= (ARM_LPAE_TCR_PS_36_BIT << ARM_LPAE_TCR_IPS_SHIFT);
tcr->ips = ARM_LPAE_TCR_PS_36_BIT;
break;
case 40:
reg |= (ARM_LPAE_TCR_PS_40_BIT << ARM_LPAE_TCR_IPS_SHIFT);
tcr->ips = ARM_LPAE_TCR_PS_40_BIT;
break;
case 42:
reg |= (ARM_LPAE_TCR_PS_42_BIT << ARM_LPAE_TCR_IPS_SHIFT);
tcr->ips = ARM_LPAE_TCR_PS_42_BIT;
break;
case 44:
reg |= (ARM_LPAE_TCR_PS_44_BIT << ARM_LPAE_TCR_IPS_SHIFT);
tcr->ips = ARM_LPAE_TCR_PS_44_BIT;
break;
case 48:
reg |= (ARM_LPAE_TCR_PS_48_BIT << ARM_LPAE_TCR_IPS_SHIFT);
tcr->ips = ARM_LPAE_TCR_PS_48_BIT;
break;
case 52:
reg |= (ARM_LPAE_TCR_PS_52_BIT << ARM_LPAE_TCR_IPS_SHIFT);
tcr->ips = ARM_LPAE_TCR_PS_52_BIT;
break;
default:
goto out_free_data;
}
reg |= (64ULL - cfg->ias) << ARM_LPAE_TCR_T0SZ_SHIFT;
/* Disable speculative walks through TTBR1 */
reg |= ARM_LPAE_TCR_EPD1;
cfg->arm_lpae_s1_cfg.tcr = reg;
tcr->tsz = 64ULL - cfg->ias;
/* MAIRs */
reg = (ARM_LPAE_MAIR_ATTR_NC
@ -872,9 +872,8 @@ arm_64_lpae_alloc_pgtable_s1(struct io_pgtable_cfg *cfg, void *cookie)
/* Ensure the empty pgd is visible before any actual TTBR write */
wmb();
/* TTBRs */
cfg->arm_lpae_s1_cfg.ttbr[0] = virt_to_phys(data->pgd);
cfg->arm_lpae_s1_cfg.ttbr[1] = 0;
/* TTBR */
cfg->arm_lpae_s1_cfg.ttbr = virt_to_phys(data->pgd);
return &data->iop;
out_free_data:
@ -885,8 +884,9 @@ out_free_data:
static struct io_pgtable *
arm_64_lpae_alloc_pgtable_s2(struct io_pgtable_cfg *cfg, void *cookie)
{
u64 reg, sl;
u64 sl;
struct arm_lpae_io_pgtable *data;
typeof(&cfg->arm_lpae_s2_cfg.vtcr) vtcr = &cfg->arm_lpae_s2_cfg.vtcr;
/* The NS quirk doesn't apply at stage 2 */
if (cfg->quirks & ~(IO_PGTABLE_QUIRK_NON_STRICT))
@ -911,55 +911,59 @@ arm_64_lpae_alloc_pgtable_s2(struct io_pgtable_cfg *cfg, void *cookie)
}
/* VTCR */
reg = ARM_64_LPAE_S2_TCR_RES1 |
(ARM_LPAE_TCR_SH_IS << ARM_LPAE_TCR_SH0_SHIFT) |
(ARM_LPAE_TCR_RGN_WBWA << ARM_LPAE_TCR_IRGN0_SHIFT) |
(ARM_LPAE_TCR_RGN_WBWA << ARM_LPAE_TCR_ORGN0_SHIFT);
if (cfg->coherent_walk) {
vtcr->sh = ARM_LPAE_TCR_SH_IS;
vtcr->irgn = ARM_LPAE_TCR_RGN_WBWA;
vtcr->orgn = ARM_LPAE_TCR_RGN_WBWA;
} else {
vtcr->sh = ARM_LPAE_TCR_SH_OS;
vtcr->irgn = ARM_LPAE_TCR_RGN_NC;
vtcr->orgn = ARM_LPAE_TCR_RGN_NC;
}
sl = data->start_level;
switch (ARM_LPAE_GRANULE(data)) {
case SZ_4K:
reg |= ARM_LPAE_TCR_TG0_4K;
vtcr->tg = ARM_LPAE_TCR_TG0_4K;
sl++; /* SL0 format is different for 4K granule size */
break;
case SZ_16K:
reg |= ARM_LPAE_TCR_TG0_16K;
vtcr->tg = ARM_LPAE_TCR_TG0_16K;
break;
case SZ_64K:
reg |= ARM_LPAE_TCR_TG0_64K;
vtcr->tg = ARM_LPAE_TCR_TG0_64K;
break;
}
switch (cfg->oas) {
case 32:
reg |= (ARM_LPAE_TCR_PS_32_BIT << ARM_LPAE_TCR_PS_SHIFT);
vtcr->ps = ARM_LPAE_TCR_PS_32_BIT;
break;
case 36:
reg |= (ARM_LPAE_TCR_PS_36_BIT << ARM_LPAE_TCR_PS_SHIFT);
vtcr->ps = ARM_LPAE_TCR_PS_36_BIT;
break;
case 40:
reg |= (ARM_LPAE_TCR_PS_40_BIT << ARM_LPAE_TCR_PS_SHIFT);
vtcr->ps = ARM_LPAE_TCR_PS_40_BIT;
break;
case 42:
reg |= (ARM_LPAE_TCR_PS_42_BIT << ARM_LPAE_TCR_PS_SHIFT);
vtcr->ps = ARM_LPAE_TCR_PS_42_BIT;
break;
case 44:
reg |= (ARM_LPAE_TCR_PS_44_BIT << ARM_LPAE_TCR_PS_SHIFT);
vtcr->ps = ARM_LPAE_TCR_PS_44_BIT;
break;
case 48:
reg |= (ARM_LPAE_TCR_PS_48_BIT << ARM_LPAE_TCR_PS_SHIFT);
vtcr->ps = ARM_LPAE_TCR_PS_48_BIT;
break;
case 52:
reg |= (ARM_LPAE_TCR_PS_52_BIT << ARM_LPAE_TCR_PS_SHIFT);
vtcr->ps = ARM_LPAE_TCR_PS_52_BIT;
break;
default:
goto out_free_data;
}
reg |= (64ULL - cfg->ias) << ARM_LPAE_TCR_T0SZ_SHIFT;
reg |= (~sl & ARM_LPAE_TCR_SL0_MASK) << ARM_LPAE_TCR_SL0_SHIFT;
cfg->arm_lpae_s2_cfg.vtcr = reg;
vtcr->tsz = 64ULL - cfg->ias;
vtcr->sl = ~sl & ARM_LPAE_VTCR_SL0_MASK;
/* Allocate pgd pages */
data->pgd = __arm_lpae_alloc_pages(ARM_LPAE_PGD_SIZE(data),
@ -982,35 +986,21 @@ out_free_data:
static struct io_pgtable *
arm_32_lpae_alloc_pgtable_s1(struct io_pgtable_cfg *cfg, void *cookie)
{
struct io_pgtable *iop;
if (cfg->ias > 32 || cfg->oas > 40)
return NULL;
cfg->pgsize_bitmap &= (SZ_4K | SZ_2M | SZ_1G);
iop = arm_64_lpae_alloc_pgtable_s1(cfg, cookie);
if (iop) {
cfg->arm_lpae_s1_cfg.tcr |= ARM_32_LPAE_TCR_EAE;
cfg->arm_lpae_s1_cfg.tcr &= 0xffffffff;
}
return iop;
return arm_64_lpae_alloc_pgtable_s1(cfg, cookie);
}
static struct io_pgtable *
arm_32_lpae_alloc_pgtable_s2(struct io_pgtable_cfg *cfg, void *cookie)
{
struct io_pgtable *iop;
if (cfg->ias > 40 || cfg->oas > 40)
return NULL;
cfg->pgsize_bitmap &= (SZ_4K | SZ_2M | SZ_1G);
iop = arm_64_lpae_alloc_pgtable_s2(cfg, cookie);
if (iop)
cfg->arm_lpae_s2_cfg.vtcr &= 0xffffffff;
return iop;
return arm_64_lpae_alloc_pgtable_s2(cfg, cookie);
}
static struct io_pgtable *

2
drivers/iommu/io-pgtable.c
View File

@ -63,7 +63,7 @@ void free_io_pgtable_ops(struct io_pgtable_ops *ops)
if (!ops)
return;
iop = container_of(ops, struct io_pgtable, ops);
iop = io_pgtable_ops_to_pgtable(ops);
io_pgtable_tlb_flush_all(iop);
io_pgtable_init_table[iop->fmt]->free(iop);
}

5
drivers/iommu/iommu-sysfs.c
View File

@ -87,6 +87,7 @@ error:
put_device(iommu->dev);
return ret;
}
EXPORT_SYMBOL_GPL(iommu_device_sysfs_add);
void iommu_device_sysfs_remove(struct iommu_device *iommu)
{
@ -94,6 +95,8 @@ void iommu_device_sysfs_remove(struct iommu_device *iommu)
device_unregister(iommu->dev);
iommu->dev = NULL;
}
EXPORT_SYMBOL_GPL(iommu_device_sysfs_remove);
/*
* IOMMU drivers can indicate a device is managed by a given IOMMU using
* this interface. A link to the device will be created in the "devices"
@ -119,6 +122,7 @@ int iommu_device_link(struct iommu_device *iommu, struct device *link)
return ret;
}
EXPORT_SYMBOL_GPL(iommu_device_link);
void iommu_device_unlink(struct iommu_device *iommu, struct device *link)
{
@ -128,3 +132,4 @@ void iommu_device_unlink(struct iommu_device *iommu, struct device *link)
sysfs_remove_link(&link->kobj, "iommu");
sysfs_remove_link_from_group(&iommu->dev->kobj, "devices", dev_name(link));
}
EXPORT_SYMBOL_GPL(iommu_device_unlink);

51
drivers/iommu/iommu.c
View File

@ -22,6 +22,7 @@
#include <linux/bitops.h>
#include <linux/property.h>
#include <linux/fsl/mc.h>
#include <linux/module.h>
#include <trace/events/iommu.h>
static struct kset *iommu_group_kset;
@ -141,6 +142,7 @@ int iommu_device_register(struct iommu_device *iommu)
spin_unlock(&iommu_device_lock);
return 0;
}
EXPORT_SYMBOL_GPL(iommu_device_register);
void iommu_device_unregister(struct iommu_device *iommu)
{
@ -148,6 +150,7 @@ void iommu_device_unregister(struct iommu_device *iommu)
list_del(&iommu->list);
spin_unlock(&iommu_device_lock);
}
EXPORT_SYMBOL_GPL(iommu_device_unregister);
static struct iommu_param *iommu_get_dev_param(struct device *dev)
{
@ -183,10 +186,21 @@ int iommu_probe_device(struct device *dev)
if (!iommu_get_dev_param(dev))
return -ENOMEM;
if (!try_module_get(ops->owner)) {
ret = -EINVAL;
goto err_free_dev_param;
}
ret = ops->add_device(dev);
if (ret)
iommu_free_dev_param(dev);
goto err_module_put;
return 0;
err_module_put:
module_put(ops->owner);
err_free_dev_param:
iommu_free_dev_param(dev);
return ret;
}
@ -197,7 +211,10 @@ void iommu_release_device(struct device *dev)
if (dev->iommu_group)
ops->remove_device(dev);
iommu_free_dev_param(dev);
if (dev->iommu_param) {
module_put(ops->owner);
iommu_free_dev_param(dev);
}
}
static struct iommu_domain *__iommu_domain_alloc(struct bus_type *bus,
@ -887,6 +904,7 @@ struct iommu_group *iommu_group_ref_get(struct iommu_group *group)
kobject_get(group->devices_kobj);
return group;
}
EXPORT_SYMBOL_GPL(iommu_group_ref_get);
/**
* iommu_group_put - Decrement group reference
@ -1260,6 +1278,7 @@ struct iommu_group *generic_device_group(struct device *dev)
{
return iommu_group_alloc();
}
EXPORT_SYMBOL_GPL(generic_device_group);
/*
* Use standard PCI bus topology, isolation features, and DMA alias quirks
@ -1327,6 +1346,7 @@ struct iommu_group *pci_device_group(struct device *dev)
/* No shared group found, allocate new */
return iommu_group_alloc();
}
EXPORT_SYMBOL_GPL(pci_device_group);
/* Get the IOMMU group for device on fsl-mc bus */
struct iommu_group *fsl_mc_device_group(struct device *dev)
@ -1339,6 +1359,7 @@ struct iommu_group *fsl_mc_device_group(struct device *dev)
group = iommu_group_alloc();
return group;
}
EXPORT_SYMBOL_GPL(fsl_mc_device_group);
/**
* iommu_group_get_for_dev - Find or create the IOMMU group for a device
@ -1407,6 +1428,7 @@ struct iommu_group *iommu_group_get_for_dev(struct device *dev)
return group;
}
EXPORT_SYMBOL(iommu_group_get_for_dev);
struct iommu_domain *iommu_group_default_domain(struct iommu_group *group)
{
@ -1537,6 +1559,11 @@ int bus_set_iommu(struct bus_type *bus, const struct iommu_ops *ops)
{
int err;
if (ops == NULL) {
bus->iommu_ops = NULL;
return 0;
}
if (bus->iommu_ops != NULL)
return -EBUSY;
@ -2230,6 +2257,25 @@ void iommu_put_resv_regions(struct device *dev, struct list_head *list)
ops->put_resv_regions(dev, list);
}
/**
* generic_iommu_put_resv_regions - Reserved region driver helper
* @dev: device for which to free reserved regions
* @list: reserved region list for device
*
* IOMMU drivers can use this to implement their .put_resv_regions() callback
* for simple reservations. Memory allocated for each reserved region will be
* freed. If an IOMMU driver allocates additional resources per region, it is
* going to have to implement a custom callback.
*/
void generic_iommu_put_resv_regions(struct device *dev, struct list_head *list)
{
struct iommu_resv_region *entry, *next;
list_for_each_entry_safe(entry, next, list, list)
kfree(entry);
}
EXPORT_SYMBOL(generic_iommu_put_resv_regions);
struct iommu_resv_region *iommu_alloc_resv_region(phys_addr_t start,
size_t length, int prot,
enum iommu_resv_type type)
@ -2247,6 +2293,7 @@ struct iommu_resv_region *iommu_alloc_resv_region(phys_addr_t start,
region->type = type;
return region;
}
EXPORT_SYMBOL_GPL(iommu_alloc_resv_region);
static int
request_default_domain_for_dev(struct device *dev, unsigned long type)

2
drivers/iommu/iova.c
View File

@ -233,7 +233,7 @@ static DEFINE_MUTEX(iova_cache_mutex);
struct iova *alloc_iova_mem(void)
{
return kmem_cache_zalloc(iova_cache, GFP_ATOMIC);
return kmem_cache_zalloc(iova_cache, GFP_ATOMIC | __GFP_NOWARN);
}
EXPORT_SYMBOL(alloc_iova_mem);

2
drivers/iommu/ipmmu-vmsa.c
View File

@ -374,7 +374,7 @@ static void ipmmu_domain_setup_context(struct ipmmu_vmsa_domain *domain)
u32 tmp;
/* TTBR0 */
ttbr = domain->cfg.arm_lpae_s1_cfg.ttbr[0];
ttbr = domain->cfg.arm_lpae_s1_cfg.ttbr;
ipmmu_ctx_write_root(domain, IMTTLBR0, ttbr);
ipmmu_ctx_write_root(domain, IMTTUBR0, ttbr >> 32);

4
drivers/iommu/msm_iommu.c
View File

@ -279,8 +279,8 @@ static void __program_context(void __iomem *base, int ctx,
SET_V2PCFG(base, ctx, 0x3);
SET_TTBCR(base, ctx, priv->cfg.arm_v7s_cfg.tcr);
SET_TTBR0(base, ctx, priv->cfg.arm_v7s_cfg.ttbr[0]);
SET_TTBR1(base, ctx, priv->cfg.arm_v7s_cfg.ttbr[1]);
SET_TTBR0(base, ctx, priv->cfg.arm_v7s_cfg.ttbr);
SET_TTBR1(base, ctx, 0);
/* Set prrr and nmrr */
SET_PRRR(base, ctx, priv->cfg.arm_v7s_cfg.prrr);

4
drivers/iommu/mtk_iommu.c
View File

@ -367,7 +367,7 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain,
/* Update the pgtable base address register of the M4U HW */
if (!data->m4u_dom) {
data->m4u_dom = dom;
writel(dom->cfg.arm_v7s_cfg.ttbr[0] & MMU_PT_ADDR_MASK,
writel(dom->cfg.arm_v7s_cfg.ttbr & MMU_PT_ADDR_MASK,
data->base + REG_MMU_PT_BASE_ADDR);
}
@ -765,7 +765,7 @@ static int __maybe_unused mtk_iommu_resume(struct device *dev)
writel_relaxed(reg->ivrp_paddr, base + REG_MMU_IVRP_PADDR);
writel_relaxed(reg->vld_pa_rng, base + REG_MMU_VLD_PA_RNG);
if (m4u_dom)
writel(m4u_dom->cfg.arm_v7s_cfg.ttbr[0] & MMU_PT_ADDR_MASK,
writel(m4u_dom->cfg.arm_v7s_cfg.ttbr & MMU_PT_ADDR_MASK,
base + REG_MMU_PT_BASE_ADDR);
return 0;
}

25
drivers/iommu/of_iommu.c
View File

@ -8,11 +8,12 @@
#include <linux/export.h>
#include <linux/iommu.h>
#include <linux/limits.h>
#include <linux/pci.h>
#include <linux/module.h>
#include <linux/msi.h>
#include <linux/of.h>
#include <linux/of_iommu.h>
#include <linux/of_pci.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/fsl/mc.h>
@ -91,16 +92,16 @@ static int of_iommu_xlate(struct device *dev,
{
const struct iommu_ops *ops;
struct fwnode_handle *fwnode = &iommu_spec->np->fwnode;
int err;
int ret;
ops = iommu_ops_from_fwnode(fwnode);
if ((ops && !ops->of_xlate) ||
!of_device_is_available(iommu_spec->np))
return NO_IOMMU;
err = iommu_fwspec_init(dev, &iommu_spec->np->fwnode, ops);
if (err)
return err;
ret = iommu_fwspec_init(dev, &iommu_spec->np->fwnode, ops);
if (ret)
return ret;
/*
* The otherwise-empty fwspec handily serves to indicate the specific
* IOMMU device we're waiting for, which will be useful if we ever get
@ -109,7 +110,12 @@ static int of_iommu_xlate(struct device *dev,
if (!ops)
return driver_deferred_probe_check_state(dev);
return ops->of_xlate(dev, iommu_spec);
if (!try_module_get(ops->owner))
return -ENODEV;
ret = ops->of_xlate(dev, iommu_spec);
module_put(ops->owner);
return ret;
}
struct of_pci_iommu_alias_info {
@ -179,6 +185,7 @@ const struct iommu_ops *of_iommu_configure(struct device *dev,
.np = master_np,
};
pci_request_acs();
err = pci_for_each_dma_alias(to_pci_dev(dev),
of_pci_iommu_init, &info);
} else if (dev_is_fsl_mc(dev)) {
@ -196,8 +203,12 @@ const struct iommu_ops *of_iommu_configure(struct device *dev,
if (err)
break;
}
}
fwspec = dev_iommu_fwspec_get(dev);
if (!err && fwspec)
of_property_read_u32(master_np, "pasid-num-bits",
&fwspec->num_pasid_bits);
}
/*
* Two success conditions can be represented by non-negative err here:

25
drivers/iommu/qcom_iommu.c
View File

@ -201,7 +201,7 @@ static irqreturn_t qcom_iommu_fault(int irq, void *dev)
fsr = iommu_readl(ctx, ARM_SMMU_CB_FSR);
if (!(fsr & FSR_FAULT))
if (!(fsr & ARM_SMMU_FSR_FAULT))
return IRQ_NONE;
fsynr = iommu_readl(ctx, ARM_SMMU_CB_FSYNR0);
@ -215,7 +215,7 @@ static irqreturn_t qcom_iommu_fault(int irq, void *dev)
}
iommu_writel(ctx, ARM_SMMU_CB_FSR, fsr);
iommu_writel(ctx, ARM_SMMU_CB_RESUME, RESUME_TERMINATE);
iommu_writel(ctx, ARM_SMMU_CB_RESUME, ARM_SMMU_RESUME_TERMINATE);
return IRQ_HANDLED;
}
@ -269,18 +269,15 @@ static int qcom_iommu_init_domain(struct iommu_domain *domain,
/* TTBRs */
iommu_writeq(ctx, ARM_SMMU_CB_TTBR0,
pgtbl_cfg.arm_lpae_s1_cfg.ttbr[0] |
FIELD_PREP(TTBRn_ASID, ctx->asid));
iommu_writeq(ctx, ARM_SMMU_CB_TTBR1,
pgtbl_cfg.arm_lpae_s1_cfg.ttbr[1] |
FIELD_PREP(TTBRn_ASID, ctx->asid));
pgtbl_cfg.arm_lpae_s1_cfg.ttbr |
FIELD_PREP(ARM_SMMU_TTBRn_ASID, ctx->asid));
iommu_writeq(ctx, ARM_SMMU_CB_TTBR1, 0);
/* TCR */
iommu_writel(ctx, ARM_SMMU_CB_TCR2,
(pgtbl_cfg.arm_lpae_s1_cfg.tcr >> 32) |
FIELD_PREP(TCR2_SEP, TCR2_SEP_UPSTREAM));
arm_smmu_lpae_tcr2(&pgtbl_cfg));
iommu_writel(ctx, ARM_SMMU_CB_TCR,
pgtbl_cfg.arm_lpae_s1_cfg.tcr);
arm_smmu_lpae_tcr(&pgtbl_cfg) | ARM_SMMU_TCR_EAE);
/* MAIRs (stage-1 only) */
iommu_writel(ctx, ARM_SMMU_CB_S1_MAIR0,
@ -289,11 +286,13 @@ static int qcom_iommu_init_domain(struct iommu_domain *domain,
pgtbl_cfg.arm_lpae_s1_cfg.mair >> 32);
/* SCTLR */
reg = SCTLR_CFIE | SCTLR_CFRE | SCTLR_AFE | SCTLR_TRE |
SCTLR_M | SCTLR_S1_ASIDPNE | SCTLR_CFCFG;
reg = ARM_SMMU_SCTLR_CFIE | ARM_SMMU_SCTLR_CFRE |
ARM_SMMU_SCTLR_AFE | ARM_SMMU_SCTLR_TRE |
ARM_SMMU_SCTLR_M | ARM_SMMU_SCTLR_S1_ASIDPNE |
ARM_SMMU_SCTLR_CFCFG;
if (IS_ENABLED(CONFIG_BIG_ENDIAN))
reg |= SCTLR_E;
reg |= ARM_SMMU_SCTLR_E;
iommu_writel(ctx, ARM_SMMU_CB_SCTLR, reg);

14
drivers/iommu/virtio-iommu.c
View File

@ -837,14 +837,6 @@ static void viommu_get_resv_regions(struct device *dev, struct list_head *head)
iommu_dma_get_resv_regions(dev, head);
}
static void viommu_put_resv_regions(struct device *dev, struct list_head *head)
{
struct iommu_resv_region *entry, *next;
list_for_each_entry_safe(entry, next, head, list)
kfree(entry);
}
static struct iommu_ops viommu_ops;
static struct virtio_driver virtio_iommu_drv;
@ -914,7 +906,7 @@ static int viommu_add_device(struct device *dev)
err_unlink_dev:
iommu_device_unlink(&viommu->iommu, dev);
err_free_dev:
viommu_put_resv_regions(dev, &vdev->resv_regions);
generic_iommu_put_resv_regions(dev, &vdev->resv_regions);
kfree(vdev);
return ret;
@ -932,7 +924,7 @@ static void viommu_remove_device(struct device *dev)
iommu_group_remove_device(dev);
iommu_device_unlink(&vdev->viommu->iommu, dev);
viommu_put_resv_regions(dev, &vdev->resv_regions);
generic_iommu_put_resv_regions(dev, &vdev->resv_regions);
kfree(vdev);
}
@ -961,7 +953,7 @@ static struct iommu_ops viommu_ops = {
.remove_device = viommu_remove_device,
.device_group = viommu_device_group,
.get_resv_regions = viommu_get_resv_regions,
.put_resv_regions = viommu_put_resv_regions,
.put_resv_regions = generic_iommu_put_resv_regions,
.of_xlate = viommu_of_xlate,
};

2
drivers/pci/ats.c
View File

@ -69,6 +69,7 @@ int pci_enable_ats(struct pci_dev *dev, int ps)
dev->ats_enabled = 1;
return 0;
}
EXPORT_SYMBOL_GPL(pci_enable_ats);
/**
* pci_disable_ats - disable the ATS capability
@ -87,6 +88,7 @@ void pci_disable_ats(struct pci_dev *dev)
dev->ats_enabled = 0;
}
EXPORT_SYMBOL_GPL(pci_disable_ats);
void pci_restore_ats_state(struct pci_dev *dev)
{

1
drivers/pci/pci.c
View File

@ -131,6 +131,7 @@ bool pci_ats_disabled(void)
{
return pcie_ats_disabled;
}
EXPORT_SYMBOL_GPL(pci_ats_disabled);
/* Disable bridge_d3 for all PCIe ports */
static bool pci_bridge_d3_disable;

25
include/linux/intel-iommu.h
View File

@ -34,10 +34,13 @@
#define VTD_STRIDE_SHIFT (9)
#define VTD_STRIDE_MASK (((u64)-1) << VTD_STRIDE_SHIFT)
#define DMA_PTE_READ (1)
#define DMA_PTE_WRITE (2)
#define DMA_PTE_LARGE_PAGE (1 << 7)
#define DMA_PTE_SNP (1 << 11)
#define DMA_PTE_READ BIT_ULL(0)
#define DMA_PTE_WRITE BIT_ULL(1)
#define DMA_PTE_LARGE_PAGE BIT_ULL(7)
#define DMA_PTE_SNP BIT_ULL(11)
#define DMA_FL_PTE_PRESENT BIT_ULL(0)
#define DMA_FL_PTE_XD BIT_ULL(63)
#define CONTEXT_TT_MULTI_LEVEL 0
#define CONTEXT_TT_DEV_IOTLB 1
@ -435,8 +438,10 @@ enum {
#define VTD_FLAG_TRANS_PRE_ENABLED (1 << 0)
#define VTD_FLAG_IRQ_REMAP_PRE_ENABLED (1 << 1)
#define VTD_FLAG_SVM_CAPABLE (1 << 2)
extern int intel_iommu_sm;
extern spinlock_t device_domain_lock;
#define sm_supported(iommu) (intel_iommu_sm && ecap_smts((iommu)->ecap))
#define pasid_supported(iommu) (sm_supported(iommu) && \
@ -609,10 +614,11 @@ static inline void dma_clear_pte(struct dma_pte *pte)
static inline u64 dma_pte_addr(struct dma_pte *pte)
{
#ifdef CONFIG_64BIT
return pte->val & VTD_PAGE_MASK;
return pte->val & VTD_PAGE_MASK & (~DMA_FL_PTE_XD);
#else
/* Must have a full atomic 64-bit read */
return __cmpxchg64(&pte->val, 0ULL, 0ULL) & VTD_PAGE_MASK;
return __cmpxchg64(&pte->val, 0ULL, 0ULL) &
VTD_PAGE_MASK & (~DMA_FL_PTE_XD);
#endif
}
@ -645,6 +651,8 @@ extern void qi_flush_iotlb(struct intel_iommu *iommu, u16 did, u64 addr,
unsigned int size_order, u64 type);
extern void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 pfsid,
u16 qdep, u64 addr, unsigned mask);
void qi_flush_piotlb(struct intel_iommu *iommu, u16 did, u32 pasid, u64 addr,
unsigned long npages, bool ih);
extern int qi_submit_sync(struct qi_desc *desc, struct intel_iommu *iommu);
extern int dmar_ir_support(void);
@ -656,9 +664,10 @@ int for_each_device_domain(int (*fn)(struct device_domain_info *info,
void *data), void *data);
void iommu_flush_write_buffer(struct intel_iommu *iommu);
int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct device *dev);
struct dmar_domain *find_domain(struct device *dev);
#ifdef CONFIG_INTEL_IOMMU_SVM
int intel_svm_init(struct intel_iommu *iommu);
extern void intel_svm_check(struct intel_iommu *iommu);
extern int intel_svm_enable_prq(struct intel_iommu *iommu);
extern int intel_svm_finish_prq(struct intel_iommu *iommu);
@ -686,6 +695,8 @@ struct intel_svm {
};
extern struct intel_iommu *intel_svm_device_to_iommu(struct device *dev);
#else
static inline void intel_svm_check(struct intel_iommu *iommu) {}
#endif
#ifdef CONFIG_INTEL_IOMMU_DEBUGFS

27
include/linux/io-pgtable.h
View File

@ -83,12 +83,16 @@ struct io_pgtable_cfg {
* IO_PGTABLE_QUIRK_NON_STRICT: Skip issuing synchronous leaf TLBIs
* on unmap, for DMA domains using the flush queue mechanism for
* delayed invalidation.
*
* IO_PGTABLE_QUIRK_ARM_TTBR1: (ARM LPAE format) Configure the table
* for use in the upper half of a split address space.
*/
#define IO_PGTABLE_QUIRK_ARM_NS BIT(0)
#define IO_PGTABLE_QUIRK_NO_PERMS BIT(1)
#define IO_PGTABLE_QUIRK_TLBI_ON_MAP BIT(2)
#define IO_PGTABLE_QUIRK_ARM_MTK_EXT BIT(3)
#define IO_PGTABLE_QUIRK_NON_STRICT BIT(4)
#define IO_PGTABLE_QUIRK_ARM_TTBR1 BIT(5)
unsigned long quirks;
unsigned long pgsize_bitmap;
unsigned int ias;
@ -100,18 +104,33 @@ struct io_pgtable_cfg {
/* Low-level data specific to the table format */
union {
struct {
u64 ttbr[2];
u64 tcr;
u64 ttbr;
struct {
u32 ips:3;
u32 tg:2;
u32 sh:2;
u32 orgn:2;
u32 irgn:2;
u32 tsz:6;
} tcr;
u64 mair;
} arm_lpae_s1_cfg;
struct {
u64 vttbr;
u64 vtcr;
struct {
u32 ps:3;
u32 tg:2;
u32 sh:2;
u32 orgn:2;
u32 irgn:2;
u32 sl:2;
u32 tsz:6;
} vtcr;
} arm_lpae_s2_cfg;
struct {
u32 ttbr[2];
u32 ttbr;
u32 tcr;
u32 nmrr;
u32 prrr;

19
include/linux/iommu.h
View File

@ -246,9 +246,10 @@ struct iommu_iotlb_gather {
* @sva_get_pasid: Get PASID associated to a SVA handle
* @page_response: handle page request response
* @cache_invalidate: invalidate translation caches
* @pgsize_bitmap: bitmap of all possible supported page sizes
* @sva_bind_gpasid: bind guest pasid and mm
* @sva_unbind_gpasid: unbind guest pasid and mm
* @pgsize_bitmap: bitmap of all possible supported page sizes
* @owner: Driver module providing these ops
*/
struct iommu_ops {
bool (*capable)(enum iommu_cap);
@ -318,6 +319,7 @@ struct iommu_ops {
int (*sva_unbind_gpasid)(struct device *dev, int pasid);
unsigned long pgsize_bitmap;
struct module *owner;
};
/**
@ -386,12 +388,19 @@ void iommu_device_sysfs_remove(struct iommu_device *iommu);
int iommu_device_link(struct iommu_device *iommu, struct device *link);
void iommu_device_unlink(struct iommu_device *iommu, struct device *link);
static inline void iommu_device_set_ops(struct iommu_device *iommu,
const struct iommu_ops *ops)
static inline void __iommu_device_set_ops(struct iommu_device *iommu,
const struct iommu_ops *ops)
{
iommu->ops = ops;
}
#define iommu_device_set_ops(iommu, ops) \
do { \
struct iommu_ops *__ops = (struct iommu_ops *)(ops); \
__ops->owner = THIS_MODULE; \
__iommu_device_set_ops(iommu, __ops); \
} while (0)
static inline void iommu_device_set_fwnode(struct iommu_device *iommu,
struct fwnode_handle *fwnode)
{
@ -456,6 +465,8 @@ extern void iommu_set_fault_handler(struct iommu_domain *domain,
extern void iommu_get_resv_regions(struct device *dev, struct list_head *list);
extern void iommu_put_resv_regions(struct device *dev, struct list_head *list);
extern void generic_iommu_put_resv_regions(struct device *dev,
struct list_head *list);
extern int iommu_request_dm_for_dev(struct device *dev);
extern int iommu_request_dma_domain_for_dev(struct device *dev);
extern void iommu_set_default_passthrough(bool cmd_line);
@ -570,6 +581,7 @@ struct iommu_group *fsl_mc_device_group(struct device *dev);
* @ops: ops for this device's IOMMU
* @iommu_fwnode: firmware handle for this device's IOMMU
* @iommu_priv: IOMMU driver private data for this device
* @num_pasid_bits: number of PASID bits supported by this device
* @num_ids: number of associated device IDs
* @ids: IDs which this device may present to the IOMMU
*/
@ -578,6 +590,7 @@ struct iommu_fwspec {
struct fwnode_handle *iommu_fwnode;
void *iommu_priv;
u32 flags;
u32 num_pasid_bits;
unsigned int num_ids;
u32 ids[1];
};

3
include/linux/pci-ats.h
View File

@ -33,6 +33,9 @@ void pci_disable_pasid(struct pci_dev *pdev);
int pci_pasid_features(struct pci_dev *pdev);
int pci_max_pasids(struct pci_dev *pdev);
#else /* CONFIG_PCI_PASID */
static inline int pci_enable_pasid(struct pci_dev *pdev, int features)
{ return -EINVAL; }
static inline void pci_disable_pasid(struct pci_dev *pdev) { }
static inline int pci_pasid_features(struct pci_dev *pdev)
{ return -EINVAL; }
static inline int pci_max_pasids(struct pci_dev *pdev)

48
include/trace/events/intel_iommu.h
View File

@ -49,12 +49,6 @@ DEFINE_EVENT(dma_map, map_single,
TP_ARGS(dev, dev_addr, phys_addr, size)
);
DEFINE_EVENT(dma_map, map_sg,
TP_PROTO(struct device *dev, dma_addr_t dev_addr, phys_addr_t phys_addr,
size_t size),
TP_ARGS(dev, dev_addr, phys_addr, size)
);
DEFINE_EVENT(dma_map, bounce_map_single,
TP_PROTO(struct device *dev, dma_addr_t dev_addr, phys_addr_t phys_addr,
size_t size),
@ -99,6 +93,48 @@ DEFINE_EVENT(dma_unmap, bounce_unmap_single,
TP_ARGS(dev, dev_addr, size)
);
DECLARE_EVENT_CLASS(dma_map_sg,
TP_PROTO(struct device *dev, int index, int total,
struct scatterlist *sg),
TP_ARGS(dev, index, total, sg),
TP_STRUCT__entry(
__string(dev_name, dev_name(dev))
__field(dma_addr_t, dev_addr)
__field(phys_addr_t, phys_addr)
__field(size_t, size)
__field(int, index)
__field(int, total)
),
TP_fast_assign(
__assign_str(dev_name, dev_name(dev));
__entry->dev_addr = sg->dma_address;
__entry->phys_addr = sg_phys(sg);
__entry->size = sg->dma_length;
__entry->index = index;
__entry->total = total;
),
TP_printk("dev=%s [%d/%d] dev_addr=0x%llx phys_addr=0x%llx size=%zu",
__get_str(dev_name), __entry->index, __entry->total,
(unsigned long long)__entry->dev_addr,
(unsigned long long)__entry->phys_addr,
__entry->size)
);
DEFINE_EVENT(dma_map_sg, map_sg,
TP_PROTO(struct device *dev, int index, int total,
struct scatterlist *sg),
TP_ARGS(dev, index, total, sg)
);
DEFINE_EVENT(dma_map_sg, bounce_map_sg,
TP_PROTO(struct device *dev, int index, int total,
struct scatterlist *sg),
TP_ARGS(dev, index, total, sg)
);
#endif /* _TRACE_INTEL_IOMMU_H */
/* This part must be outside protection */