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xen: features and fixes for 4.8-rc0

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- ACPI support for guests on ARM platforms.
 - Generic steal time support for arm and x86.
 - Support cases where kernel cpu is not Xen VCPU number (e.g., if
   in-guest kexec is used).
 - Use the system workqueue instead of a custom workqueue in various
   places.
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Merge tag 'for-linus-4.8-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen updates from David Vrabel:
 "Features and fixes for 4.8-rc0:

   - ACPI support for guests on ARM platforms.
   - Generic steal time support for arm and x86.
   - Support cases where kernel cpu is not Xen VCPU number (e.g., if
     in-guest kexec is used).
   - Use the system workqueue instead of a custom workqueue in various
     places"

* tag 'for-linus-4.8-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: (47 commits)
  xen: add static initialization of steal_clock op to xen_time_ops
  xen/pvhvm: run xen_vcpu_setup() for the boot CPU
  xen/evtchn: use xen_vcpu_id mapping
  xen/events: fifo: use xen_vcpu_id mapping
  xen/events: use xen_vcpu_id mapping in events_base
  x86/xen: use xen_vcpu_id mapping when pointing vcpu_info to shared_info
  x86/xen: use xen_vcpu_id mapping for HYPERVISOR_vcpu_op
  xen: introduce xen_vcpu_id mapping
  x86/acpi: store ACPI ids from MADT for future usage
  x86/xen: update cpuid.h from Xen-4.7
  xen/evtchn: add IOCTL_EVTCHN_RESTRICT
  xen-blkback: really don't leak mode property
  xen-blkback: constify instance of "struct attribute_group"
  xen-blkfront: prefer xenbus_scanf() over xenbus_gather()
  xen-blkback: prefer xenbus_scanf() over xenbus_gather()
  xen: support runqueue steal time on xen
  arm/xen: add support for vm_assist hypercall
  xen: update xen headers
  xen-pciback: drop superfluous variables
  xen-pciback: short-circuit read path used for merging write values
  ...
This commit is contained in:
Linus Torvalds 2016-07-27 11:35:37 -07:00
commit 08fd8c1768
59 changed files with 1150 additions and 493 deletions
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35
Documentation/devicetree/bindings/arm/xen.txt
View File

@ -11,10 +11,32 @@ the following properties:
memory where the grant table should be mapped to, using an
HYPERVISOR_memory_op hypercall. The memory region is large enough to map
the whole grant table (it is larger or equal to gnttab_max_grant_frames()).
This property is unnecessary when booting Dom0 using ACPI.
- interrupts: the interrupt used by Xen to inject event notifications.
A GIC node is also required.
This property is unnecessary when booting Dom0 using ACPI.
To support UEFI on Xen ARM virtual platforms, Xen populates the FDT "uefi" node
under /hypervisor with following parameters:
________________________________________________________________________________
Name | Size | Description
================================================================================
xen,uefi-system-table | 64-bit | Guest physical address of the UEFI System
| | Table.
--------------------------------------------------------------------------------
xen,uefi-mmap-start | 64-bit | Guest physical address of the UEFI memory
| | map.
--------------------------------------------------------------------------------
xen,uefi-mmap-size | 32-bit | Size in bytes of the UEFI memory map
| | pointed to in previous entry.
--------------------------------------------------------------------------------
xen,uefi-mmap-desc-size | 32-bit | Size in bytes of each entry in the UEFI
| | memory map.
--------------------------------------------------------------------------------
xen,uefi-mmap-desc-ver | 32-bit | Version of the mmap descriptor format.
--------------------------------------------------------------------------------
Example (assuming #address-cells = <2> and #size-cells = <2>):
@ -22,4 +44,17 @@ hypervisor {
compatible = "xen,xen-4.3", "xen,xen";
reg = <0 0xb0000000 0 0x20000>;
interrupts = <1 15 0xf08>;
uefi {
xen,uefi-system-table = <0xXXXXXXXX>;
xen,uefi-mmap-start = <0xXXXXXXXX>;
xen,uefi-mmap-size = <0xXXXXXXXX>;
xen,uefi-mmap-desc-size = <0xXXXXXXXX>;
xen,uefi-mmap-desc-ver = <0xXXXXXXXX>;
};
};
The format and meaning of the "xen,uefi-*" parameters are similar to those in
Documentation/arm/uefi.txt, which are provided by the regular UEFI stub. However
they differ because they are provided by the Xen hypervisor, together with a set
of UEFI runtime services implemented via hypercalls, see
http://xenbits.xen.org/docs/unstable/hypercall/x86_64/include,public,platform.h.html.

1
arch/arm/include/asm/xen/hypercall.h
View File

@ -52,6 +52,7 @@ int HYPERVISOR_memory_op(unsigned int cmd, void *arg);
int HYPERVISOR_physdev_op(int cmd, void *arg);
int HYPERVISOR_vcpu_op(int cmd, int vcpuid, void *extra_args);
int HYPERVISOR_tmem_op(void *arg);
int HYPERVISOR_vm_assist(unsigned int cmd, unsigned int type);
int HYPERVISOR_platform_op_raw(void *arg);
static inline int HYPERVISOR_platform_op(struct xen_platform_op *op)
{

6
arch/arm/include/asm/xen/xen-ops.h Normal file
View File

@ -0,0 +1,6 @@
#ifndef _ASM_XEN_OPS_H
#define _ASM_XEN_OPS_H
void xen_efi_runtime_setup(void);
#endif /* _ASM_XEN_OPS_H */

2
arch/arm/kernel/setup.c
View File

@ -1064,6 +1064,7 @@ void __init setup_arch(char **cmdline_p)
early_paging_init(mdesc);
#endif
setup_dma_zone(mdesc);
xen_early_init();
efi_init();
sanity_check_meminfo();
arm_memblock_init(mdesc);
@ -1080,7 +1081,6 @@ void __init setup_arch(char **cmdline_p)
arm_dt_init_cpu_maps();
psci_dt_init();
xen_early_init();
#ifdef CONFIG_SMP
if (is_smp()) {
if (!mdesc->smp_init || !mdesc->smp_init()) {

1
arch/arm/xen/Makefile
View File

@ -1 +1,2 @@
obj-y := enlighten.o hypercall.o grant-table.o p2m.o mm.o
obj-$(CONFIG_XEN_EFI) += efi.o

40
arch/arm/xen/efi.c Normal file
View File

@ -0,0 +1,40 @@
/*
* Copyright (c) 2015, Linaro Limited, Shannon Zhao
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/efi.h>
#include <xen/xen-ops.h>
#include <asm/xen/xen-ops.h>
/* Set XEN EFI runtime services function pointers. Other fields of struct efi,
* e.g. efi.systab, will be set like normal EFI.
*/
void __init xen_efi_runtime_setup(void)
{
efi.get_time = xen_efi_get_time;
efi.set_time = xen_efi_set_time;
efi.get_wakeup_time = xen_efi_get_wakeup_time;
efi.set_wakeup_time = xen_efi_set_wakeup_time;
efi.get_variable = xen_efi_get_variable;
efi.get_next_variable = xen_efi_get_next_variable;
efi.set_variable = xen_efi_set_variable;
efi.query_variable_info = xen_efi_query_variable_info;
efi.update_capsule = xen_efi_update_capsule;
efi.query_capsule_caps = xen_efi_query_capsule_caps;
efi.get_next_high_mono_count = xen_efi_get_next_high_mono_count;
efi.reset_system = NULL; /* Functionality provided by Xen. */
}
EXPORT_SYMBOL_GPL(xen_efi_runtime_setup);

157
arch/arm/xen/enlighten.c
View File

@ -12,14 +12,16 @@
#include <xen/page.h>
#include <xen/interface/sched.h>
#include <xen/xen-ops.h>
#include <asm/paravirt.h>
#include <asm/xen/hypervisor.h>
#include <asm/xen/hypercall.h>
#include <asm/xen/xen-ops.h>
#include <asm/system_misc.h>
#include <asm/efi.h>
#include <linux/interrupt.h>
#include <linux/irqreturn.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_fdt.h>
#include <linux/of_irq.h>
#include <linux/of_address.h>
#include <linux/cpuidle.h>
@ -30,6 +32,7 @@
#include <linux/time64.h>
#include <linux/timekeeping.h>
#include <linux/timekeeper_internal.h>
#include <linux/acpi.h>
#include <linux/mm.h>
@ -46,14 +49,16 @@ struct shared_info *HYPERVISOR_shared_info = (void *)&xen_dummy_shared_info;
DEFINE_PER_CPU(struct vcpu_info *, xen_vcpu);
static struct vcpu_info __percpu *xen_vcpu_info;
/* Linux <-> Xen vCPU id mapping */
DEFINE_PER_CPU(int, xen_vcpu_id) = -1;
EXPORT_PER_CPU_SYMBOL(xen_vcpu_id);
/* These are unused until we support booting "pre-ballooned" */
unsigned long xen_released_pages;
struct xen_memory_region xen_extra_mem[XEN_EXTRA_MEM_MAX_REGIONS] __initdata;
static __read_mostly unsigned int xen_events_irq;
static __initdata struct device_node *xen_node;
int xen_remap_domain_gfn_array(struct vm_area_struct *vma,
unsigned long addr,
xen_pfn_t *gfn, int nr,
@ -84,19 +89,6 @@ int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
}
EXPORT_SYMBOL_GPL(xen_unmap_domain_gfn_range);
static unsigned long long xen_stolen_accounting(int cpu)
{
struct vcpu_runstate_info state;
BUG_ON(cpu != smp_processor_id());
xen_get_runstate_snapshot(&state);
WARN_ON(state.state != RUNSTATE_running);
return state.time[RUNSTATE_runnable] + state.time[RUNSTATE_offline];
}
static void xen_read_wallclock(struct timespec64 *ts)
{
u32 version;
@ -179,10 +171,14 @@ static void xen_percpu_init(void)
pr_info("Xen: initializing cpu%d\n", cpu);
vcpup = per_cpu_ptr(xen_vcpu_info, cpu);
/* Direct vCPU id mapping for ARM guests. */
per_cpu(xen_vcpu_id, cpu) = cpu;
info.mfn = virt_to_gfn(vcpup);
info.offset = xen_offset_in_page(vcpup);
err = HYPERVISOR_vcpu_op(VCPUOP_register_vcpu_info, cpu, &info);
err = HYPERVISOR_vcpu_op(VCPUOP_register_vcpu_info, xen_vcpu_nr(cpu),
&info);
BUG_ON(err);
per_cpu(xen_vcpu, cpu) = vcpup;
@ -237,6 +233,46 @@ static irqreturn_t xen_arm_callback(int irq, void *arg)
return IRQ_HANDLED;
}
static __initdata struct {
const char *compat;
const char *prefix;
const char *version;
bool found;
} hyper_node = {"xen,xen", "xen,xen-", NULL, false};
static int __init fdt_find_hyper_node(unsigned long node, const char *uname,
int depth, void *data)
{
const void *s = NULL;
int len;
if (depth != 1 || strcmp(uname, "hypervisor") != 0)
return 0;
if (of_flat_dt_is_compatible(node, hyper_node.compat))
hyper_node.found = true;
s = of_get_flat_dt_prop(node, "compatible", &len);
if (strlen(hyper_node.prefix) + 3 < len &&
!strncmp(hyper_node.prefix, s, strlen(hyper_node.prefix)))
hyper_node.version = s + strlen(hyper_node.prefix);
/*
* Check if Xen supports EFI by checking whether there is the
* "/hypervisor/uefi" node in DT. If so, runtime services are available
* through proxy functions (e.g. in case of Xen dom0 EFI implementation
* they call special hypercall which executes relevant EFI functions)
* and that is why they are always enabled.
*/
if (IS_ENABLED(CONFIG_XEN_EFI)) {
if ((of_get_flat_dt_subnode_by_name(node, "uefi") > 0) &&
!efi_runtime_disabled())
set_bit(EFI_RUNTIME_SERVICES, &efi.flags);
}
return 0;
}
/*
* see Documentation/devicetree/bindings/arm/xen.txt for the
* documentation of the Xen Device Tree format.
@ -244,26 +280,18 @@ static irqreturn_t xen_arm_callback(int irq, void *arg)
#define GRANT_TABLE_PHYSADDR 0
void __init xen_early_init(void)
{
int len;
const char *s = NULL;
const char *version = NULL;
const char *xen_prefix = "xen,xen-";
xen_node = of_find_compatible_node(NULL, NULL, "xen,xen");
if (!xen_node) {
of_scan_flat_dt(fdt_find_hyper_node, NULL);
if (!hyper_node.found) {
pr_debug("No Xen support\n");
return;
}
s = of_get_property(xen_node, "compatible", &len);
if (strlen(xen_prefix) + 3 < len &&
!strncmp(xen_prefix, s, strlen(xen_prefix)))
version = s + strlen(xen_prefix);
if (version == NULL) {
if (hyper_node.version == NULL) {
pr_debug("Xen version not found\n");
return;
}
pr_info("Xen %s support found\n", version);
pr_info("Xen %s support found\n", hyper_node.version);
xen_domain_type = XEN_HVM_DOMAIN;
@ -278,28 +306,68 @@ void __init xen_early_init(void)
add_preferred_console("hvc", 0, NULL);
}
static void __init xen_acpi_guest_init(void)
{
#ifdef CONFIG_ACPI
struct xen_hvm_param a;
int interrupt, trigger, polarity;
a.domid = DOMID_SELF;
a.index = HVM_PARAM_CALLBACK_IRQ;
if (HYPERVISOR_hvm_op(HVMOP_get_param, &a)
|| (a.value >> 56) != HVM_PARAM_CALLBACK_TYPE_PPI) {
xen_events_irq = 0;
return;
}
interrupt = a.value & 0xff;
trigger = ((a.value >> 8) & 0x1) ? ACPI_EDGE_SENSITIVE
: ACPI_LEVEL_SENSITIVE;
polarity = ((a.value >> 8) & 0x2) ? ACPI_ACTIVE_LOW
: ACPI_ACTIVE_HIGH;
xen_events_irq = acpi_register_gsi(NULL, interrupt, trigger, polarity);
#endif
}
static void __init xen_dt_guest_init(void)
{
struct device_node *xen_node;
xen_node = of_find_compatible_node(NULL, NULL, "xen,xen");
if (!xen_node) {
pr_err("Xen support was detected before, but it has disappeared\n");
return;
}
xen_events_irq = irq_of_parse_and_map(xen_node, 0);
}
static int __init xen_guest_init(void)
{
struct xen_add_to_physmap xatp;
struct shared_info *shared_info_page = NULL;
struct resource res;
phys_addr_t grant_frames;
if (!xen_domain())
return 0;
if (of_address_to_resource(xen_node, GRANT_TABLE_PHYSADDR, &res)) {
pr_err("Xen grant table base address not found\n");
return -ENODEV;
}
grant_frames = res.start;
if (!acpi_disabled)
xen_acpi_guest_init();
else
xen_dt_guest_init();
xen_events_irq = irq_of_parse_and_map(xen_node, 0);
if (!xen_events_irq) {
pr_err("Xen event channel interrupt not found\n");
return -ENODEV;
}
/*
* The fdt parsing codes have set EFI_RUNTIME_SERVICES if Xen EFI
* parameters are found. Force enable runtime services.
*/
if (efi_enabled(EFI_RUNTIME_SERVICES))
xen_efi_runtime_setup();
shared_info_page = (struct shared_info *)get_zeroed_page(GFP_KERNEL);
if (!shared_info_page) {
@ -328,7 +396,13 @@ static int __init xen_guest_init(void)
if (xen_vcpu_info == NULL)
return -ENOMEM;
if (gnttab_setup_auto_xlat_frames(grant_frames)) {
/* Direct vCPU id mapping for ARM guests. */
per_cpu(xen_vcpu_id, 0) = 0;
xen_auto_xlat_grant_frames.count = gnttab_max_grant_frames();
if (xen_xlate_map_ballooned_pages(&xen_auto_xlat_grant_frames.pfn,
&xen_auto_xlat_grant_frames.vaddr,
xen_auto_xlat_grant_frames.count)) {
free_percpu(xen_vcpu_info);
return -ENOMEM;
}
@ -355,8 +429,8 @@ static int __init xen_guest_init(void)
register_cpu_notifier(&xen_cpu_notifier);
pv_time_ops.steal_clock = xen_stolen_accounting;
static_key_slow_inc(&paravirt_steal_enabled);
xen_time_setup_guest();
if (xen_initial_domain())
pvclock_gtod_register_notifier(&xen_pvclock_gtod_notifier);
@ -403,4 +477,5 @@ EXPORT_SYMBOL_GPL(HYPERVISOR_vcpu_op);
EXPORT_SYMBOL_GPL(HYPERVISOR_tmem_op);
EXPORT_SYMBOL_GPL(HYPERVISOR_platform_op);
EXPORT_SYMBOL_GPL(HYPERVISOR_multicall);
EXPORT_SYMBOL_GPL(HYPERVISOR_vm_assist);
EXPORT_SYMBOL_GPL(privcmd_call);

1
arch/arm/xen/hypercall.S
View File

@ -91,6 +91,7 @@ HYPERCALL3(vcpu_op);
HYPERCALL1(tmem_op);
HYPERCALL1(platform_op_raw);
HYPERCALL2(multicall);
HYPERCALL2(vm_assist);
ENTRY(privcmd_call)
stmdb sp!, {r4}

6
arch/arm64/include/asm/xen/xen-ops.h Normal file
View File

@ -0,0 +1,6 @@
#ifndef _ASM_XEN_OPS_H
#define _ASM_XEN_OPS_H
void xen_efi_runtime_setup(void);
#endif /* _ASM_XEN_OPS_H */

3
arch/arm64/kernel/setup.c
View File

@ -257,6 +257,7 @@ void __init setup_arch(char **cmdline_p)
*/
cpu_uninstall_idmap();
xen_early_init();
efi_init();
arm64_memblock_init();
@ -283,8 +284,6 @@ void __init setup_arch(char **cmdline_p)
else
psci_acpi_init();
xen_early_init();
cpu_read_bootcpu_ops();
smp_init_cpus();
smp_build_mpidr_hash();

1
arch/arm64/xen/Makefile
View File

@ -1,2 +1,3 @@
xen-arm-y += $(addprefix ../../arm/xen/, enlighten.o grant-table.o p2m.o mm.o)
obj-y := xen-arm.o hypercall.o
obj-$(CONFIG_XEN_EFI) += $(addprefix ../../arm/xen/, efi.o)

1
arch/arm64/xen/hypercall.S
View File

@ -82,6 +82,7 @@ HYPERCALL3(vcpu_op);
HYPERCALL1(tmem_op);
HYPERCALL1(platform_op_raw);
HYPERCALL2(multicall);
HYPERCALL2(vm_assist);
ENTRY(privcmd_call)
mov x16, x0

1
arch/x86/include/asm/cpu.h
View File

@ -16,6 +16,7 @@ extern void prefill_possible_map(void);
static inline void prefill_possible_map(void) {}
#define cpu_physical_id(cpu) boot_cpu_physical_apicid
#define cpu_acpi_id(cpu) 0
#define safe_smp_processor_id() 0
#endif /* CONFIG_SMP */

2
arch/x86/include/asm/smp.h
View File

@ -33,6 +33,7 @@ static inline struct cpumask *cpu_llc_shared_mask(int cpu)
}
DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid);
DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid);
DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid);
#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid);
@ -148,6 +149,7 @@ void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle);
void smp_store_boot_cpu_info(void);
void smp_store_cpu_info(int id);
#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
#define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu)
#else /* !CONFIG_SMP */
#define wbinvd_on_cpu(cpu) wbinvd()

5
arch/x86/include/asm/xen/cpuid.h
View File

@ -76,15 +76,18 @@
/*
* Leaf 5 (0x40000x04)
* HVM-specific features
* EAX: Features
* EBX: vcpu id (iff EAX has XEN_HVM_CPUID_VCPU_ID_PRESENT flag)
*/
/* EAX Features */
/* Virtualized APIC registers */
#define XEN_HVM_CPUID_APIC_ACCESS_VIRT (1u << 0)
/* Virtualized x2APIC accesses */
#define XEN_HVM_CPUID_X2APIC_VIRT (1u << 1)
/* Memory mapped from other domains has valid IOMMU entries */
#define XEN_HVM_CPUID_IOMMU_MAPPINGS (1u << 2)
/* vcpu id is present in EBX */
#define XEN_HVM_CPUID_VCPU_ID_PRESENT (1u << 3)
#define XEN_CPUID_MAX_NUM_LEAVES 4

16
arch/x86/kernel/acpi/boot.c
View File

@ -161,13 +161,15 @@ static int __init acpi_parse_madt(struct acpi_table_header *table)
/**
* acpi_register_lapic - register a local apic and generates a logic cpu number
* @id: local apic id to register
* @acpiid: ACPI id to register
* @enabled: this cpu is enabled or not
*
* Returns the logic cpu number which maps to the local apic
*/
static int acpi_register_lapic(int id, u8 enabled)
static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
{
unsigned int ver = 0;
int cpu;
if (id >= MAX_LOCAL_APIC) {
printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
@ -182,7 +184,11 @@ static int acpi_register_lapic(int id, u8 enabled)
if (boot_cpu_physical_apicid != -1U)
ver = apic_version[boot_cpu_physical_apicid];
return generic_processor_info(id, ver);
cpu = generic_processor_info(id, ver);
if (cpu >= 0)
early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
return cpu;
}
static int __init
@ -212,7 +218,7 @@ acpi_parse_x2apic(struct acpi_subtable_header *header, const unsigned long end)
if (!apic->apic_id_valid(apic_id) && enabled)
printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
else
acpi_register_lapic(apic_id, enabled);
acpi_register_lapic(apic_id, processor->uid, enabled);
#else
printk(KERN_WARNING PREFIX "x2apic entry ignored\n");
#endif
@ -240,6 +246,7 @@ acpi_parse_lapic(struct acpi_subtable_header * header, const unsigned long end)
* when we use CPU hotplug.
*/
acpi_register_lapic(processor->id, /* APIC ID */
processor->processor_id, /* ACPI ID */
processor->lapic_flags & ACPI_MADT_ENABLED);
return 0;
@ -258,6 +265,7 @@ acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
acpi_table_print_madt_entry(header);
acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
processor->processor_id, /* ACPI ID */
processor->lapic_flags & ACPI_MADT_ENABLED);
return 0;
@ -714,7 +722,7 @@ int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu)
{
int cpu;
cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED);
cpu = acpi_register_lapic(physid, U32_MAX, ACPI_MADT_ENABLED);
if (cpu < 0) {
pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
return cpu;

2
arch/x86/kernel/apic/apic.c
View File

@ -92,8 +92,10 @@ static int apic_extnmi = APIC_EXTNMI_BSP;
*/
DEFINE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid, BAD_APICID);
DEFINE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid, BAD_APICID);
DEFINE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid, U32_MAX);
EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_apicid);
EXPORT_EARLY_PER_CPU_SYMBOL(x86_bios_cpu_apicid);
EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_acpiid);
#ifdef CONFIG_X86_32

3
arch/x86/kernel/setup_percpu.c
View File

@ -236,6 +236,8 @@ void __init setup_per_cpu_areas(void)
early_per_cpu_map(x86_cpu_to_apicid, cpu);
per_cpu(x86_bios_cpu_apicid, cpu) =
early_per_cpu_map(x86_bios_cpu_apicid, cpu);
per_cpu(x86_cpu_to_acpiid, cpu) =
early_per_cpu_map(x86_cpu_to_acpiid, cpu);
#endif
#ifdef CONFIG_X86_32
per_cpu(x86_cpu_to_logical_apicid, cpu) =
@ -271,6 +273,7 @@ void __init setup_per_cpu_areas(void)
#ifdef CONFIG_X86_LOCAL_APIC
early_per_cpu_ptr(x86_cpu_to_apicid) = NULL;
early_per_cpu_ptr(x86_bios_cpu_apicid) = NULL;
early_per_cpu_ptr(x86_cpu_to_acpiid) = NULL;
#endif
#ifdef CONFIG_X86_32
early_per_cpu_ptr(x86_cpu_to_logical_apicid) = NULL;

111
arch/x86/xen/efi.c
View File

@ -20,10 +20,121 @@
#include <linux/init.h>
#include <linux/string.h>
#include <xen/xen.h>
#include <xen/xen-ops.h>
#include <xen/interface/platform.h>
#include <asm/page.h>
#include <asm/setup.h>
#include <asm/xen/hypercall.h>
static efi_char16_t vendor[100] __initdata;
static efi_system_table_t efi_systab_xen __initdata = {
.hdr = {
.signature = EFI_SYSTEM_TABLE_SIGNATURE,
.revision = 0, /* Initialized later. */
.headersize = 0, /* Ignored by Linux Kernel. */
.crc32 = 0, /* Ignored by Linux Kernel. */
.reserved = 0
},
.fw_vendor = EFI_INVALID_TABLE_ADDR, /* Initialized later. */
.fw_revision = 0, /* Initialized later. */
.con_in_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
.con_in = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
.con_out_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
.con_out = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
.stderr_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
.stderr = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
.runtime = (efi_runtime_services_t *)EFI_INVALID_TABLE_ADDR,
/* Not used under Xen. */
.boottime = (efi_boot_services_t *)EFI_INVALID_TABLE_ADDR,
/* Not used under Xen. */
.nr_tables = 0, /* Initialized later. */
.tables = EFI_INVALID_TABLE_ADDR /* Initialized later. */
};
static const struct efi efi_xen __initconst = {
.systab = NULL, /* Initialized later. */
.runtime_version = 0, /* Initialized later. */
.mps = EFI_INVALID_TABLE_ADDR,
.acpi = EFI_INVALID_TABLE_ADDR,
.acpi20 = EFI_INVALID_TABLE_ADDR,
.smbios = EFI_INVALID_TABLE_ADDR,
.smbios3 = EFI_INVALID_TABLE_ADDR,
.sal_systab = EFI_INVALID_TABLE_ADDR,
.boot_info = EFI_INVALID_TABLE_ADDR,
.hcdp = EFI_INVALID_TABLE_ADDR,
.uga = EFI_INVALID_TABLE_ADDR,
.uv_systab = EFI_INVALID_TABLE_ADDR,
.fw_vendor = EFI_INVALID_TABLE_ADDR,
.runtime = EFI_INVALID_TABLE_ADDR,
.config_table = EFI_INVALID_TABLE_ADDR,
.get_time = xen_efi_get_time,
.set_time = xen_efi_set_time,
.get_wakeup_time = xen_efi_get_wakeup_time,
.set_wakeup_time = xen_efi_set_wakeup_time,
.get_variable = xen_efi_get_variable,
.get_next_variable = xen_efi_get_next_variable,
.set_variable = xen_efi_set_variable,
.query_variable_info = xen_efi_query_variable_info,
.update_capsule = xen_efi_update_capsule,
.query_capsule_caps = xen_efi_query_capsule_caps,
.get_next_high_mono_count = xen_efi_get_next_high_mono_count,
.reset_system = NULL, /* Functionality provided by Xen. */
.set_virtual_address_map = NULL, /* Not used under Xen. */
.flags = 0 /* Initialized later. */
};
static efi_system_table_t __init *xen_efi_probe(void)
{
struct xen_platform_op op = {
.cmd = XENPF_firmware_info,
.u.firmware_info = {
.type = XEN_FW_EFI_INFO,
.index = XEN_FW_EFI_CONFIG_TABLE
}
};
union xenpf_efi_info *info = &op.u.firmware_info.u.efi_info;
if (!xen_initial_domain() || HYPERVISOR_platform_op(&op) < 0)
return NULL;
/* Here we know that Xen runs on EFI platform. */
efi = efi_xen;
efi_systab_xen.tables = info->cfg.addr;
efi_systab_xen.nr_tables = info->cfg.nent;
op.cmd = XENPF_firmware_info;
op.u.firmware_info.type = XEN_FW_EFI_INFO;
op.u.firmware_info.index = XEN_FW_EFI_VENDOR;
info->vendor.bufsz = sizeof(vendor);
set_xen_guest_handle(info->vendor.name, vendor);
if (HYPERVISOR_platform_op(&op) == 0) {
efi_systab_xen.fw_vendor = __pa_symbol(vendor);
efi_systab_xen.fw_revision = info->vendor.revision;
} else
efi_systab_xen.fw_vendor = __pa_symbol(L"UNKNOWN");
op.cmd = XENPF_firmware_info;
op.u.firmware_info.type = XEN_FW_EFI_INFO;
op.u.firmware_info.index = XEN_FW_EFI_VERSION;
if (HYPERVISOR_platform_op(&op) == 0)
efi_systab_xen.hdr.revision = info->version;
op.cmd = XENPF_firmware_info;
op.u.firmware_info.type = XEN_FW_EFI_INFO;
op.u.firmware_info.index = XEN_FW_EFI_RT_VERSION;
if (HYPERVISOR_platform_op(&op) == 0)
efi.runtime_version = info->version;
return &efi_systab_xen;
}
void __init xen_efi_init(void)
{

49
arch/x86/xen/enlighten.c
View File

@ -59,6 +59,7 @@
#include <asm/xen/pci.h>
#include <asm/xen/hypercall.h>
#include <asm/xen/hypervisor.h>
#include <asm/xen/cpuid.h>
#include <asm/fixmap.h>
#include <asm/processor.h>
#include <asm/proto.h>
@ -118,6 +119,10 @@ DEFINE_PER_CPU(struct vcpu_info *, xen_vcpu);
*/
DEFINE_PER_CPU(struct vcpu_info, xen_vcpu_info);
/* Linux <-> Xen vCPU id mapping */
DEFINE_PER_CPU(int, xen_vcpu_id) = -1;
EXPORT_PER_CPU_SYMBOL(xen_vcpu_id);
enum xen_domain_type xen_domain_type = XEN_NATIVE;
EXPORT_SYMBOL_GPL(xen_domain_type);
@ -179,7 +184,7 @@ static void clamp_max_cpus(void)
#endif
}
static void xen_vcpu_setup(int cpu)
void xen_vcpu_setup(int cpu)
{
struct vcpu_register_vcpu_info info;
int err;
@ -202,8 +207,9 @@ static void xen_vcpu_setup(int cpu)
if (per_cpu(xen_vcpu, cpu) == &per_cpu(xen_vcpu_info, cpu))
return;
}
if (cpu < MAX_VIRT_CPUS)
per_cpu(xen_vcpu,cpu) = &HYPERVISOR_shared_info->vcpu_info[cpu];
if (xen_vcpu_nr(cpu) < MAX_VIRT_CPUS)
per_cpu(xen_vcpu, cpu) =
&HYPERVISOR_shared_info->vcpu_info[xen_vcpu_nr(cpu)];
if (!have_vcpu_info_placement) {
if (cpu >= MAX_VIRT_CPUS)
@ -223,7 +229,8 @@ static void xen_vcpu_setup(int cpu)
hypervisor has no unregister variant and this hypercall does not
allow to over-write info.mfn and info.offset.
*/
err = HYPERVISOR_vcpu_op(VCPUOP_register_vcpu_info, cpu, &info);
err = HYPERVISOR_vcpu_op(VCPUOP_register_vcpu_info, xen_vcpu_nr(cpu),
&info);
if (err) {
printk(KERN_DEBUG "register_vcpu_info failed: err=%d\n", err);
@ -247,10 +254,11 @@ void xen_vcpu_restore(void)
for_each_possible_cpu(cpu) {
bool other_cpu = (cpu != smp_processor_id());
bool is_up = HYPERVISOR_vcpu_op(VCPUOP_is_up, cpu, NULL);
bool is_up = HYPERVISOR_vcpu_op(VCPUOP_is_up, xen_vcpu_nr(cpu),
NULL);
if (other_cpu && is_up &&
HYPERVISOR_vcpu_op(VCPUOP_down, cpu, NULL))
HYPERVISOR_vcpu_op(VCPUOP_down, xen_vcpu_nr(cpu), NULL))
BUG();
xen_setup_runstate_info(cpu);
@ -259,7 +267,7 @@ void xen_vcpu_restore(void)
xen_vcpu_setup(cpu);
if (other_cpu && is_up &&
HYPERVISOR_vcpu_op(VCPUOP_up, cpu, NULL))
HYPERVISOR_vcpu_op(VCPUOP_up, xen_vcpu_nr(cpu), NULL))
BUG();
}
}
@ -588,7 +596,7 @@ static void xen_load_gdt(const struct desc_ptr *dtr)
{
unsigned long va = dtr->address;
unsigned int size = dtr->size + 1;
unsigned pages = (size + PAGE_SIZE - 1) / PAGE_SIZE;
unsigned pages = DIV_ROUND_UP(size, PAGE_SIZE);
unsigned long frames[pages];
int f;
@ -637,7 +645,7 @@ static void __init xen_load_gdt_boot(const struct desc_ptr *dtr)
{
unsigned long va = dtr->address;
unsigned int size = dtr->size + 1;
unsigned pages = (size + PAGE_SIZE - 1) / PAGE_SIZE;
unsigned pages = DIV_ROUND_UP(size, PAGE_SIZE);
unsigned long frames[pages];
int f;
@ -1135,8 +1143,11 @@ void xen_setup_vcpu_info_placement(void)
{
int cpu;
for_each_possible_cpu(cpu)
for_each_possible_cpu(cpu) {
/* Set up direct vCPU id mapping for PV guests. */
per_cpu(xen_vcpu_id, cpu) = cpu;
xen_vcpu_setup(cpu);
}
/* xen_vcpu_setup managed to place the vcpu_info within the
* percpu area for all cpus, so make use of it. Note that for
@ -1727,6 +1738,9 @@ asmlinkage __visible void __init xen_start_kernel(void)
#endif
xen_raw_console_write("about to get started...\n");
/* Let's presume PV guests always boot on vCPU with id 0. */
per_cpu(xen_vcpu_id, 0) = 0;
xen_setup_runstate_info(0);
xen_efi_init();
@ -1768,9 +1782,10 @@ void __ref xen_hvm_init_shared_info(void)
* in that case multiple vcpus might be online. */
for_each_online_cpu(cpu) {
/* Leave it to be NULL. */
if (cpu >= MAX_VIRT_CPUS)
if (xen_vcpu_nr(cpu) >= MAX_VIRT_CPUS)
continue;
per_cpu(xen_vcpu, cpu) = &HYPERVISOR_shared_info->vcpu_info[cpu];
per_cpu(xen_vcpu, cpu) =
&HYPERVISOR_shared_info->vcpu_info[xen_vcpu_nr(cpu)];
}
}
@ -1795,6 +1810,12 @@ static void __init init_hvm_pv_info(void)
xen_setup_features();
cpuid(base + 4, &eax, &ebx, &ecx, &edx);
if (eax & XEN_HVM_CPUID_VCPU_ID_PRESENT)
this_cpu_write(xen_vcpu_id, ebx);
else
this_cpu_write(xen_vcpu_id, smp_processor_id());
pv_info.name = "Xen HVM";
xen_domain_type = XEN_HVM_DOMAIN;
@ -1806,6 +1827,10 @@ static int xen_hvm_cpu_notify(struct notifier_block *self, unsigned long action,
int cpu = (long)hcpu;
switch (action) {
case CPU_UP_PREPARE:
if (cpu_acpi_id(cpu) != U32_MAX)
per_cpu(xen_vcpu_id, cpu) = cpu_acpi_id(cpu);
else
per_cpu(xen_vcpu_id, cpu) = cpu;
xen_vcpu_setup(cpu);
if (xen_have_vector_callback) {
if (xen_feature(XENFEAT_hvm_safe_pvclock))

57
arch/x86/xen/grant-table.c
View File

@ -111,63 +111,18 @@ int arch_gnttab_init(unsigned long nr_shared)
}
#ifdef CONFIG_XEN_PVH
#include <xen/balloon.h>
#include <xen/events.h>
#include <linux/slab.h>
static int __init xlated_setup_gnttab_pages(void)
{
struct page **pages;
xen_pfn_t *pfns;
void *vaddr;
int rc;
unsigned int i;
unsigned long nr_grant_frames = gnttab_max_grant_frames();
BUG_ON(nr_grant_frames == 0);
pages = kcalloc(nr_grant_frames, sizeof(pages[0]), GFP_KERNEL);
if (!pages)
return -ENOMEM;
pfns = kcalloc(nr_grant_frames, sizeof(pfns[0]), GFP_KERNEL);
if (!pfns) {
kfree(pages);
return -ENOMEM;
}
rc = alloc_xenballooned_pages(nr_grant_frames, pages);
if (rc) {
pr_warn("%s Couldn't balloon alloc %ld pfns rc:%d\n", __func__,
nr_grant_frames, rc);
kfree(pages);
kfree(pfns);
return rc;
}
for (i = 0; i < nr_grant_frames; i++)
pfns[i] = page_to_pfn(pages[i]);
vaddr = vmap(pages, nr_grant_frames, 0, PAGE_KERNEL);
if (!vaddr) {
pr_warn("%s Couldn't map %ld pfns rc:%d\n", __func__,
nr_grant_frames, rc);
free_xenballooned_pages(nr_grant_frames, pages);
kfree(pages);
kfree(pfns);
return -ENOMEM;
}
kfree(pages);
xen_auto_xlat_grant_frames.pfn = pfns;
xen_auto_xlat_grant_frames.count = nr_grant_frames;
xen_auto_xlat_grant_frames.vaddr = vaddr;
return 0;
}
#include <xen/xen-ops.h>
static int __init xen_pvh_gnttab_setup(void)
{
if (!xen_pvh_domain())
return -ENODEV;
return xlated_setup_gnttab_pages();
xen_auto_xlat_grant_frames.count = gnttab_max_grant_frames();
return xen_xlate_map_ballooned_pages(&xen_auto_xlat_grant_frames.pfn,
&xen_auto_xlat_grant_frames.vaddr,
xen_auto_xlat_grant_frames.count);
}
/* Call it _before_ __gnttab_init as we need to initialize the
* xen_auto_xlat_grant_frames first. */

3
arch/x86/xen/irq.c
View File

@ -109,7 +109,8 @@ static void xen_safe_halt(void)
static void xen_halt(void)
{
if (irqs_disabled())
HYPERVISOR_vcpu_op(VCPUOP_down, smp_processor_id(), NULL);
HYPERVISOR_vcpu_op(VCPUOP_down,
xen_vcpu_nr(smp_processor_id()), NULL);
else
xen_safe_halt();
}

2
arch/x86/xen/pmu.c
View File

@ -547,7 +547,7 @@ void xen_pmu_init(int cpu)
return;
fail:
pr_warn_once("Could not initialize VPMU for cpu %d, error %d\n",
pr_info_once("Could not initialize VPMU for cpu %d, error %d\n",
cpu, err);
free_pages((unsigned long)xenpmu_data, 0);
}

18
arch/x86/xen/smp.c
View File

@ -322,6 +322,13 @@ static void __init xen_smp_prepare_boot_cpu(void)
xen_filter_cpu_maps();
xen_setup_vcpu_info_placement();
}
/*
* Setup vcpu_info for boot CPU.
*/
if (xen_hvm_domain())
xen_vcpu_setup(0);
/*
* The alternative logic (which patches the unlock/lock) runs before
* the smp bootup up code is activated. Hence we need to set this up
@ -454,7 +461,7 @@ cpu_initialize_context(unsigned int cpu, struct task_struct *idle)
#endif
ctxt->user_regs.esp = idle->thread.sp0 - sizeof(struct pt_regs);
ctxt->ctrlreg[3] = xen_pfn_to_cr3(virt_to_gfn(swapper_pg_dir));
if (HYPERVISOR_vcpu_op(VCPUOP_initialise, cpu, ctxt))
if (HYPERVISOR_vcpu_op(VCPUOP_initialise, xen_vcpu_nr(cpu), ctxt))
BUG();
kfree(ctxt);
@ -492,7 +499,7 @@ static int xen_cpu_up(unsigned int cpu, struct task_struct *idle)
if (rc)
return rc;
rc = HYPERVISOR_vcpu_op(VCPUOP_up, cpu, NULL);
rc = HYPERVISOR_vcpu_op(VCPUOP_up, xen_vcpu_nr(cpu), NULL);
BUG_ON(rc);
while (cpu_report_state(cpu) != CPU_ONLINE)
@ -520,7 +527,8 @@ static int xen_cpu_disable(void)
static void xen_cpu_die(unsigned int cpu)
{
while (xen_pv_domain() && HYPERVISOR_vcpu_op(VCPUOP_is_up, cpu, NULL)) {
while (xen_pv_domain() && HYPERVISOR_vcpu_op(VCPUOP_is_up,
xen_vcpu_nr(cpu), NULL)) {
__set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(HZ/10);
}
@ -536,7 +544,7 @@ static void xen_cpu_die(unsigned int cpu)
static void xen_play_dead(void) /* used only with HOTPLUG_CPU */
{
play_dead_common();
HYPERVISOR_vcpu_op(VCPUOP_down, smp_processor_id(), NULL);
HYPERVISOR_vcpu_op(VCPUOP_down, xen_vcpu_nr(smp_processor_id()), NULL);
cpu_bringup();
/*
* commit 4b0c0f294 (tick: Cleanup NOHZ per cpu data on cpu down)
@ -576,7 +584,7 @@ static void stop_self(void *v)
set_cpu_online(cpu, false);
HYPERVISOR_vcpu_op(VCPUOP_down, cpu, NULL);
HYPERVISOR_vcpu_op(VCPUOP_down, xen_vcpu_nr(cpu), NULL);
BUG();
}

63
arch/x86/xen/time.c
View File

@ -11,8 +11,6 @@
#include <linux/interrupt.h>
#include <linux/clocksource.h>
#include <linux/clockchips.h>
#include <linux/kernel_stat.h>
#include <linux/math64.h>
#include <linux/gfp.h>
#include <linux/slab.h>
#include <linux/pvclock_gtod.h>
@ -31,44 +29,6 @@
/* Xen may fire a timer up to this many ns early */
#define TIMER_SLOP 100000
#define NS_PER_TICK (1000000000LL / HZ)
/* snapshots of runstate info */
static DEFINE_PER_CPU(struct vcpu_runstate_info, xen_runstate_snapshot);
/* unused ns of stolen time */
static DEFINE_PER_CPU(u64, xen_residual_stolen);
static void do_stolen_accounting(void)
{
struct vcpu_runstate_info state;
struct vcpu_runstate_info *snap;
s64 runnable, offline, stolen;
cputime_t ticks;
xen_get_runstate_snapshot(&state);
WARN_ON(state.state != RUNSTATE_running);
snap = this_cpu_ptr(&xen_runstate_snapshot);
/* work out how much time the VCPU has not been runn*ing* */
runnable = state.time[RUNSTATE_runnable] - snap->time[RUNSTATE_runnable];
offline = state.time[RUNSTATE_offline] - snap->time[RUNSTATE_offline];
*snap = state;
/* Add the appropriate number of ticks of stolen time,
including any left-overs from last time. */
stolen = runnable + offline + __this_cpu_read(xen_residual_stolen);
if (stolen < 0)
stolen = 0;
ticks = iter_div_u64_rem(stolen, NS_PER_TICK, &stolen);
__this_cpu_write(xen_residual_stolen, stolen);
account_steal_ticks(ticks);
}
/* Get the TSC speed from Xen */
static unsigned long xen_tsc_khz(void)
@ -263,8 +223,10 @@ static int xen_vcpuop_shutdown(struct clock_event_device *evt)
{
int cpu = smp_processor_id();
if (HYPERVISOR_vcpu_op(VCPUOP_stop_singleshot_timer, cpu, NULL) ||
HYPERVISOR_vcpu_op(VCPUOP_stop_periodic_timer, cpu, NULL))
if (HYPERVISOR_vcpu_op(VCPUOP_stop_singleshot_timer, xen_vcpu_nr(cpu),
NULL) ||
HYPERVISOR_vcpu_op(VCPUOP_stop_periodic_timer, xen_vcpu_nr(cpu),
NULL))
BUG();
return 0;
@ -274,7 +236,8 @@ static int xen_vcpuop_set_oneshot(struct clock_event_device *evt)
{
int cpu = smp_processor_id();
if (HYPERVISOR_vcpu_op(VCPUOP_stop_periodic_timer, cpu, NULL))
if (HYPERVISOR_vcpu_op(VCPUOP_stop_periodic_timer, xen_vcpu_nr(cpu),
NULL))
BUG();
return 0;
@ -293,7 +256,8 @@ static int xen_vcpuop_set_next_event(unsigned long delta,
/* Get an event anyway, even if the timeout is already expired */
single.flags = 0;
ret = HYPERVISOR_vcpu_op(VCPUOP_set_singleshot_timer, cpu, &single);
ret = HYPERVISOR_vcpu_op(VCPUOP_set_singleshot_timer, xen_vcpu_nr(cpu),
&single);
BUG_ON(ret != 0);
return ret;
@ -335,8 +299,6 @@ static irqreturn_t xen_timer_interrupt(int irq, void *dev_id)
ret = IRQ_HANDLED;
}
do_stolen_accounting();
return ret;
}
@ -394,13 +356,15 @@ void xen_timer_resume(void)
return;
for_each_online_cpu(cpu) {
if (HYPERVISOR_vcpu_op(VCPUOP_stop_periodic_timer, cpu, NULL))
if (HYPERVISOR_vcpu_op(VCPUOP_stop_periodic_timer,
xen_vcpu_nr(cpu), NULL))
BUG();
}
}
static const struct pv_time_ops xen_time_ops __initconst = {
.sched_clock = xen_clocksource_read,
.steal_clock = xen_steal_clock,
};
static void __init xen_time_init(void)
@ -414,7 +378,8 @@ static void __init xen_time_init(void)
clocksource_register_hz(&xen_clocksource, NSEC_PER_SEC);
if (HYPERVISOR_vcpu_op(VCPUOP_stop_periodic_timer, cpu, NULL) == 0) {
if (HYPERVISOR_vcpu_op(VCPUOP_stop_periodic_timer, xen_vcpu_nr(cpu),
NULL) == 0) {
/* Successfully turned off 100Hz tick, so we have the
vcpuop-based timer interface */
printk(KERN_DEBUG "Xen: using vcpuop timer interface\n");
@ -431,6 +396,8 @@ static void __init xen_time_init(void)
xen_setup_timer(cpu);
xen_setup_cpu_clockevents();
xen_time_setup_guest();
if (xen_initial_domain())
pvclock_gtod_register_notifier(&xen_pvclock_gtod_notifier);
}

1
arch/x86/xen/xen-ops.h
View File

@ -76,6 +76,7 @@ irqreturn_t xen_debug_interrupt(int irq, void *dev_id);
bool xen_vcpu_stolen(int vcpu);
void xen_vcpu_setup(int cpu);
void xen_setup_vcpu_info_placement(void);
#ifdef CONFIG_SMP

74
drivers/acpi/scan.c
View File

@ -46,6 +46,13 @@ DEFINE_MUTEX(acpi_device_lock);
LIST_HEAD(acpi_wakeup_device_list);
static DEFINE_MUTEX(acpi_hp_context_lock);
/*
* The UART device described by the SPCR table is the only object which needs
* special-casing. Everything else is covered by ACPI namespace paths in STAO
* table.
*/
static u64 spcr_uart_addr;
struct acpi_dep_data {
struct list_head node;
acpi_handle master;
@ -1458,6 +1465,41 @@ static int acpi_add_single_object(struct acpi_device **child,
return 0;
}
static acpi_status acpi_get_resource_memory(struct acpi_resource *ares,
void *context)
{
struct resource *res = context;
if (acpi_dev_resource_memory(ares, res))
return AE_CTRL_TERMINATE;
return AE_OK;
}
static bool acpi_device_should_be_hidden(acpi_handle handle)
{
acpi_status status;
struct resource res;
/* Check if it should ignore the UART device */
if (!(spcr_uart_addr && acpi_has_method(handle, METHOD_NAME__CRS)))
return false;
/*
* The UART device described in SPCR table is assumed to have only one
* memory resource present. So we only look for the first one here.
*/
status = acpi_walk_resources(handle, METHOD_NAME__CRS,
acpi_get_resource_memory, &res);
if (ACPI_FAILURE(status) || res.start != spcr_uart_addr)
return false;
acpi_handle_info(handle, "The UART device @%pa in SPCR table will be hidden\n",
&res.start);
return true;
}
static int acpi_bus_type_and_status(acpi_handle handle, int *type,
unsigned long long *sta)
{
@ -1471,6 +1513,9 @@ static int acpi_bus_type_and_status(acpi_handle handle, int *type,
switch (acpi_type) {
case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */
case ACPI_TYPE_DEVICE:
if (acpi_device_should_be_hidden(handle))
return -ENODEV;
*type = ACPI_BUS_TYPE_DEVICE;
status = acpi_bus_get_status_handle(handle, sta);
if (ACPI_FAILURE(status))
@ -1925,11 +1970,26 @@ static int acpi_bus_scan_fixed(void)
return result < 0 ? result : 0;
}
static void __init acpi_get_spcr_uart_addr(void)
{
acpi_status status;
struct acpi_table_spcr *spcr_ptr;
status = acpi_get_table(ACPI_SIG_SPCR, 0,
(struct acpi_table_header **)&spcr_ptr);
if (ACPI_SUCCESS(status))
spcr_uart_addr = spcr_ptr->serial_port.address;
else
printk(KERN_WARNING PREFIX "STAO table present, but SPCR is missing\n");
}
static bool acpi_scan_initialized;
int __init acpi_scan_init(void)
{
int result;
acpi_status status;
struct acpi_table_stao *stao_ptr;
acpi_pci_root_init();
acpi_pci_link_init();
@ -1945,6 +2005,20 @@ int __init acpi_scan_init(void)
acpi_scan_add_handler(&generic_device_handler);
/*
* If there is STAO table, check whether it needs to ignore the UART
* device in SPCR table.
*/
status = acpi_get_table(ACPI_SIG_STAO, 0,
(struct acpi_table_header **)&stao_ptr);
if (ACPI_SUCCESS(status)) {
if (stao_ptr->header.length > sizeof(struct acpi_table_stao))
printk(KERN_INFO PREFIX "STAO Name List not yet supported.");
if (stao_ptr->ignore_uart)
acpi_get_spcr_uart_addr();
}
mutex_lock(&acpi_scan_lock);
/*
* Enumerate devices in the ACPI namespace.

20
drivers/block/xen-blkback/xenbus.c
View File

@ -379,7 +379,7 @@ static struct attribute *xen_vbdstat_attrs[] = {
NULL
};
static struct attribute_group xen_vbdstat_group = {
static const struct attribute_group xen_vbdstat_group = {
.name = "statistics",
.attrs = xen_vbdstat_attrs,
};
@ -715,8 +715,11 @@ static void backend_changed(struct xenbus_watch *watch,
/* Front end dir is a number, which is used as the handle. */
err = kstrtoul(strrchr(dev->otherend, '/') + 1, 0, &handle);
if (err)
if (err) {
kfree(be->mode);
be->mode = NULL;
return;
}
be->major = major;
be->minor = minor;
@ -1022,9 +1025,9 @@ static int connect_ring(struct backend_info *be)
pr_debug("%s %s\n", __func__, dev->otherend);
be->blkif->blk_protocol = BLKIF_PROTOCOL_DEFAULT;
err = xenbus_gather(XBT_NIL, dev->otherend, "protocol",
"%63s", protocol, NULL);
if (err)
err = xenbus_scanf(XBT_NIL, dev->otherend, "protocol",
"%63s", protocol);
if (err <= 0)
strcpy(protocol, "unspecified, assuming default");
else if (0 == strcmp(protocol, XEN_IO_PROTO_ABI_NATIVE))
be->blkif->blk_protocol = BLKIF_PROTOCOL_NATIVE;
@ -1036,10 +1039,9 @@ static int connect_ring(struct backend_info *be)
xenbus_dev_fatal(dev, err, "unknown fe protocol %s", protocol);
return -ENOSYS;
}
err = xenbus_gather(XBT_NIL, dev->otherend,
"feature-persistent", "%u",
&pers_grants, NULL);
if (err)
err = xenbus_scanf(XBT_NIL, dev->otherend,
"feature-persistent", "%u", &pers_grants);
if (err <= 0)
pers_grants = 0;
be->blkif->vbd.feature_gnt_persistent = pers_grants;

43
drivers/block/xen-blkfront.c
View File

@ -2197,10 +2197,9 @@ static void blkfront_setup_discard(struct blkfront_info *info)
info->discard_granularity = discard_granularity;
info->discard_alignment = discard_alignment;
}
err = xenbus_gather(XBT_NIL, info->xbdev->otherend,
"discard-secure", "%d", &discard_secure,
NULL);
if (!err)
err = xenbus_scanf(XBT_NIL, info->xbdev->otherend,
"discard-secure", "%u", &discard_secure);
if (err > 0)
info->feature_secdiscard = !!discard_secure;
}
@ -2300,9 +2299,8 @@ static void blkfront_gather_backend_features(struct blkfront_info *info)
info->feature_flush = 0;
info->feature_fua = 0;
err = xenbus_gather(XBT_NIL, info->xbdev->otherend,
"feature-barrier", "%d", &barrier,
NULL);
err = xenbus_scanf(XBT_NIL, info->xbdev->otherend,
"feature-barrier", "%d", &barrier);
/*
* If there's no "feature-barrier" defined, then it means
@ -2311,7 +2309,7 @@ static void blkfront_gather_backend_features(struct blkfront_info *info)
*
* If there are barriers, then we use flush.
*/
if (!err && barrier) {
if (err > 0 && barrier) {
info->feature_flush = 1;
info->feature_fua = 1;
}
@ -2320,34 +2318,31 @@ static void blkfront_gather_backend_features(struct blkfront_info *info)
* And if there is "feature-flush-cache" use that above
* barriers.
*/
err = xenbus_gather(XBT_NIL, info->xbdev->otherend,
"feature-flush-cache", "%d", &flush,
NULL);
err = xenbus_scanf(XBT_NIL, info->xbdev->otherend,
"feature-flush-cache", "%d", &flush);
if (!err && flush) {
if (err > 0 && flush) {
info->feature_flush = 1;
info->feature_fua = 0;
}
err = xenbus_gather(XBT_NIL, info->xbdev->otherend,
"feature-discard", "%d", &discard,
NULL);
err = xenbus_scanf(XBT_NIL, info->xbdev->otherend,
"feature-discard", "%d", &discard);
if (!err && discard)
if (err > 0 && discard)
blkfront_setup_discard(info);
err = xenbus_gather(XBT_NIL, info->xbdev->otherend,
"feature-persistent", "%u", &persistent,
NULL);
if (err)
err = xenbus_scanf(XBT_NIL, info->xbdev->otherend,
"feature-persistent", "%d", &persistent);
if (err <= 0)
info->feature_persistent = 0;
else
info->feature_persistent = persistent;
err = xenbus_gather(XBT_NIL, info->xbdev->otherend,
"feature-max-indirect-segments", "%u", &indirect_segments,
NULL);
if (err)
err = xenbus_scanf(XBT_NIL, info->xbdev->otherend,
"feature-max-indirect-segments", "%u",
&indirect_segments);
if (err <= 0)
info->max_indirect_segments = 0;
else
info->max_indirect_segments = min(indirect_segments,

5
drivers/firmware/efi/arm-runtime.c
View File

@ -107,6 +107,11 @@ static int __init arm_enable_runtime_services(void)
return 0;
}
if (efi_enabled(EFI_RUNTIME_SERVICES)) {
pr_info("EFI runtime services access via paravirt.\n");
return 0;
}
pr_info("Remapping and enabling EFI services.\n");
mapsize = efi.memmap.map_end - efi.memmap.map;

81
drivers/firmware/efi/efi.c
View File

@ -568,12 +568,14 @@ device_initcall(efi_load_efivars);
FIELD_SIZEOF(struct efi_fdt_params, field) \
}
static __initdata struct {
struct params {
const char name[32];
const char propname[32];
int offset;
int size;
} dt_params[] = {
};
static __initdata struct params fdt_params[] = {
UEFI_PARAM("System Table", "linux,uefi-system-table", system_table),
UEFI_PARAM("MemMap Address", "linux,uefi-mmap-start", mmap),
UEFI_PARAM("MemMap Size", "linux,uefi-mmap-size", mmap_size),
@ -581,44 +583,91 @@ static __initdata struct {
UEFI_PARAM("MemMap Desc. Version", "linux,uefi-mmap-desc-ver", desc_ver)
};
static __initdata struct params xen_fdt_params[] = {
UEFI_PARAM("System Table", "xen,uefi-system-table", system_table),
UEFI_PARAM("MemMap Address", "xen,uefi-mmap-start", mmap),
UEFI_PARAM("MemMap Size", "xen,uefi-mmap-size", mmap_size),
UEFI_PARAM("MemMap Desc. Size", "xen,uefi-mmap-desc-size", desc_size),
UEFI_PARAM("MemMap Desc. Version", "xen,uefi-mmap-desc-ver", desc_ver)
};
#define EFI_FDT_PARAMS_SIZE ARRAY_SIZE(fdt_params)
static __initdata struct {
const char *uname;
const char *subnode;
struct params *params;
} dt_params[] = {
{ "hypervisor", "uefi", xen_fdt_params },
{ "chosen", NULL, fdt_params },
};
struct param_info {
int found;
void *params;
const char *missing;
};
static int __init fdt_find_uefi_params(unsigned long node, const char *uname,
int depth, void *data)
static int __init __find_uefi_params(unsigned long node,
struct param_info *info,
struct params *params)
{
struct param_info *info = data;
const void *prop;
void *dest;
u64 val;
int i, len;
if (depth != 1 || strcmp(uname, "chosen") != 0)
return 0;
for (i = 0; i < ARRAY_SIZE(dt_params); i++) {
prop = of_get_flat_dt_prop(node, dt_params[i].propname, &len);
if (!prop)
for (i = 0; i < EFI_FDT_PARAMS_SIZE; i++) {
prop = of_get_flat_dt_prop(node, params[i].propname, &len);
if (!prop) {
info->missing = params[i].name;
return 0;
dest = info->params + dt_params[i].offset;
}
dest = info->params + params[i].offset;
info->found++;
val = of_read_number(prop, len / sizeof(u32));
if (dt_params[i].size == sizeof(u32))
if (params[i].size == sizeof(u32))
*(u32 *)dest = val;
else
*(u64 *)dest = val;
if (efi_enabled(EFI_DBG))
pr_info(" %s: 0x%0*llx\n", dt_params[i].name,
dt_params[i].size * 2, val);
pr_info(" %s: 0x%0*llx\n", params[i].name,
params[i].size * 2, val);
}
return 1;
}
static int __init fdt_find_uefi_params(unsigned long node, const char *uname,
int depth, void *data)
{
struct param_info *info = data;
int i;
for (i = 0; i < ARRAY_SIZE(dt_params); i++) {
const char *subnode = dt_params[i].subnode;
if (depth != 1 || strcmp(uname, dt_params[i].uname) != 0) {
info->missing = dt_params[i].params[0].name;
continue;
}
if (subnode) {
node = of_get_flat_dt_subnode_by_name(node, subnode);
if (node < 0)
return 0;
}
return __find_uefi_params(node, info, dt_params[i].params);
}
return 0;
}
int __init efi_get_fdt_params(struct efi_fdt_params *params)
{
struct param_info info;
@ -634,7 +683,7 @@ int __init efi_get_fdt_params(struct efi_fdt_params *params)
pr_info("UEFI not found.\n");
else if (!ret)
pr_err("Can't find '%s' in device tree!\n",
dt_params[info.found].name);
info.missing);
return ret;
}

13
drivers/of/fdt.c
View File

@ -743,6 +743,19 @@ int __init of_scan_flat_dt(int (*it)(unsigned long node,
return rc;
}
/**
* of_get_flat_dt_subnode_by_name - get the subnode by given name
*
* @node: the parent node
* @uname: the name of subnode
* @return offset of the subnode, or -FDT_ERR_NOTFOUND if there is none
*/
int of_get_flat_dt_subnode_by_name(unsigned long node, const char *uname)
{
return fdt_subnode_offset(initial_boot_params, node, uname);
}
/**
* of_get_flat_dt_root - find the root node in the flat blob
*/

2
drivers/xen/Kconfig
View File

@ -275,7 +275,7 @@ config XEN_HAVE_PVMMU
config XEN_EFI
def_bool y
depends on X86_64 && EFI
depends on (ARM || ARM64 || X86_64) && EFI
config XEN_AUTO_XLATE
def_bool y

1
drivers/xen/Makefile
View File

@ -10,6 +10,7 @@ CFLAGS_features.o := $(nostackp)
CFLAGS_efi.o += -fshort-wchar
LDFLAGS += $(call ld-option, --no-wchar-size-warning)
dom0-$(CONFIG_ARM64) += arm-device.o
dom0-$(CONFIG_PCI) += pci.o
dom0-$(CONFIG_USB_SUPPORT) += dbgp.o
dom0-$(CONFIG_XEN_ACPI) += acpi.o $(xen-pad-y)

196
drivers/xen/arm-device.c Normal file
View File

@ -0,0 +1,196 @@
/*
* Copyright (c) 2015, Linaro Limited, Shannon Zhao
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/platform_device.h>
#include <linux/acpi.h>
#include <xen/xen.h>
#include <xen/page.h>
#include <xen/interface/memory.h>
#include <asm/xen/hypervisor.h>
#include <asm/xen/hypercall.h>
static int xen_unmap_device_mmio(const struct resource *resources,
unsigned int count)
{
unsigned int i, j, nr;
int rc = 0;
const struct resource *r;
struct xen_remove_from_physmap xrp;
for (i = 0; i < count; i++) {
r = &resources[i];
nr = DIV_ROUND_UP(resource_size(r), XEN_PAGE_SIZE);
if ((resource_type(r) != IORESOURCE_MEM) || (nr == 0))
continue;
for (j = 0; j < nr; j++) {
xrp.domid = DOMID_SELF;
xrp.gpfn = XEN_PFN_DOWN(r->start) + j;
rc = HYPERVISOR_memory_op(XENMEM_remove_from_physmap,
&xrp);
if (rc)
return rc;
}
}
return rc;
}
static int xen_map_device_mmio(const struct resource *resources,
unsigned int count)
{
unsigned int i, j, nr;
int rc = 0;
const struct resource *r;
xen_pfn_t *gpfns;
xen_ulong_t *idxs;
int *errs;
struct xen_add_to_physmap_range xatp;
for (i = 0; i < count; i++) {
r = &resources[i];
nr = DIV_ROUND_UP(resource_size(r), XEN_PAGE_SIZE);
if ((resource_type(r) != IORESOURCE_MEM) || (nr == 0))
continue;
gpfns = kzalloc(sizeof(xen_pfn_t) * nr, GFP_KERNEL);
idxs = kzalloc(sizeof(xen_ulong_t) * nr, GFP_KERNEL);
errs = kzalloc(sizeof(int) * nr, GFP_KERNEL);
if (!gpfns || !idxs || !errs) {
kfree(gpfns);
kfree(idxs);
kfree(errs);
rc = -ENOMEM;
goto unmap;
}
for (j = 0; j < nr; j++) {
/*
* The regions are always mapped 1:1 to DOM0 and this is
* fine because the memory map for DOM0 is the same as
* the host (except for the RAM).
*/
gpfns[j] = XEN_PFN_DOWN(r->start) + j;
idxs[j] = XEN_PFN_DOWN(r->start) + j;
}
xatp.domid = DOMID_SELF;
xatp.size = nr;
xatp.space = XENMAPSPACE_dev_mmio;
set_xen_guest_handle(xatp.gpfns, gpfns);
set_xen_guest_handle(xatp.idxs, idxs);
set_xen_guest_handle(xatp.errs, errs);
rc = HYPERVISOR_memory_op(XENMEM_add_to_physmap_range, &xatp);
kfree(gpfns);
kfree(idxs);
kfree(errs);
if (rc)
goto unmap;
}
return rc;
unmap:
xen_unmap_device_mmio(resources, i);
return rc;
}
static int xen_platform_notifier(struct notifier_block *nb,
unsigned long action, void *data)
{
struct platform_device *pdev = to_platform_device(data);
int r = 0;
if (pdev->num_resources == 0 || pdev->resource == NULL)
return NOTIFY_OK;
switch (action) {
case BUS_NOTIFY_ADD_DEVICE:
r = xen_map_device_mmio(pdev->resource, pdev->num_resources);
break;
case BUS_NOTIFY_DEL_DEVICE:
r = xen_unmap_device_mmio(pdev->resource, pdev->num_resources);
break;
default:
return NOTIFY_DONE;
}
if (r)
dev_err(&pdev->dev, "Platform: Failed to %s device %s MMIO!\n",
action == BUS_NOTIFY_ADD_DEVICE ? "map" :
(action == BUS_NOTIFY_DEL_DEVICE ? "unmap" : "?"),
pdev->name);
return NOTIFY_OK;
}
static struct notifier_block platform_device_nb = {
.notifier_call = xen_platform_notifier,
};
static int __init register_xen_platform_notifier(void)
{
if (!xen_initial_domain() || acpi_disabled)
return 0;
return bus_register_notifier(&platform_bus_type, &platform_device_nb);
}
arch_initcall(register_xen_platform_notifier);
#ifdef CONFIG_ARM_AMBA
#include <linux/amba/bus.h>
static int xen_amba_notifier(struct notifier_block *nb,
unsigned long action, void *data)
{
struct amba_device *adev = to_amba_device(data);
int r = 0;
switch (action) {
case BUS_NOTIFY_ADD_DEVICE:
r = xen_map_device_mmio(&adev->res, 1);
break;
case BUS_NOTIFY_DEL_DEVICE:
r = xen_unmap_device_mmio(&adev->res, 1);
break;
default:
return NOTIFY_DONE;
}
if (r)
dev_err(&adev->dev, "AMBA: Failed to %s device %s MMIO!\n",
action == BUS_NOTIFY_ADD_DEVICE ? "map" :
(action == BUS_NOTIFY_DEL_DEVICE ? "unmap" : "?"),
adev->dev.init_name);
return NOTIFY_OK;
}
static struct notifier_block amba_device_nb = {
.notifier_call = xen_amba_notifier,
};
static int __init register_xen_amba_notifier(void)
{
if (!xen_initial_domain() || acpi_disabled)
return 0;
return bus_register_notifier(&amba_bustype, &amba_device_nb);
}
arch_initcall(register_xen_amba_notifier);
#endif

173
drivers/xen/efi.c
View File

@ -38,7 +38,7 @@
#define efi_data(op) (op.u.efi_runtime_call)
static efi_status_t xen_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc)
efi_status_t xen_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc)
{
struct xen_platform_op op = INIT_EFI_OP(get_time);
@ -59,8 +59,9 @@ static efi_status_t xen_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc)
return efi_data(op).status;
}
EXPORT_SYMBOL_GPL(xen_efi_get_time);
static efi_status_t xen_efi_set_time(efi_time_t *tm)
efi_status_t xen_efi_set_time(efi_time_t *tm)
{
struct xen_platform_op op = INIT_EFI_OP(set_time);
@ -72,10 +73,10 @@ static efi_status_t xen_efi_set_time(efi_time_t *tm)
return efi_data(op).status;
}
EXPORT_SYMBOL_GPL(xen_efi_set_time);
static efi_status_t xen_efi_get_wakeup_time(efi_bool_t *enabled,
efi_bool_t *pending,
efi_time_t *tm)
efi_status_t xen_efi_get_wakeup_time(efi_bool_t *enabled, efi_bool_t *pending,
efi_time_t *tm)
{
struct xen_platform_op op = INIT_EFI_OP(get_wakeup_time);
@ -95,8 +96,9 @@ static efi_status_t xen_efi_get_wakeup_time(efi_bool_t *enabled,
return efi_data(op).status;
}
EXPORT_SYMBOL_GPL(xen_efi_get_wakeup_time);
static efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm)
efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm)
{
struct xen_platform_op op = INIT_EFI_OP(set_wakeup_time);
@ -113,12 +115,11 @@ static efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm)
return efi_data(op).status;
}
EXPORT_SYMBOL_GPL(xen_efi_set_wakeup_time);
static efi_status_t xen_efi_get_variable(efi_char16_t *name,
efi_guid_t *vendor,
u32 *attr,
unsigned long *data_size,
void *data)
efi_status_t xen_efi_get_variable(efi_char16_t *name, efi_guid_t *vendor,
u32 *attr, unsigned long *data_size,
void *data)
{
struct xen_platform_op op = INIT_EFI_OP(get_variable);
@ -138,10 +139,11 @@ static efi_status_t xen_efi_get_variable(efi_char16_t *name,
return efi_data(op).status;
}
EXPORT_SYMBOL_GPL(xen_efi_get_variable);
static efi_status_t xen_efi_get_next_variable(unsigned long *name_size,
efi_char16_t *name,
efi_guid_t *vendor)
efi_status_t xen_efi_get_next_variable(unsigned long *name_size,
efi_char16_t *name,
efi_guid_t *vendor)
{
struct xen_platform_op op = INIT_EFI_OP(get_next_variable_name);
@ -161,12 +163,11 @@ static efi_status_t xen_efi_get_next_variable(unsigned long *name_size,
return efi_data(op).status;
}
EXPORT_SYMBOL_GPL(xen_efi_get_next_variable);
static efi_status_t xen_efi_set_variable(efi_char16_t *name,
efi_guid_t *vendor,
u32 attr,
unsigned long data_size,
void *data)
efi_status_t xen_efi_set_variable(efi_char16_t *name, efi_guid_t *vendor,
u32 attr, unsigned long data_size,
void *data)
{
struct xen_platform_op op = INIT_EFI_OP(set_variable);
@ -183,11 +184,11 @@ static efi_status_t xen_efi_set_variable(efi_char16_t *name,
return efi_data(op).status;
}
EXPORT_SYMBOL_GPL(xen_efi_set_variable);
static efi_status_t xen_efi_query_variable_info(u32 attr,
u64 *storage_space,
u64 *remaining_space,
u64 *max_variable_size)
efi_status_t xen_efi_query_variable_info(u32 attr, u64 *storage_space,
u64 *remaining_space,
u64 *max_variable_size)
{
struct xen_platform_op op = INIT_EFI_OP(query_variable_info);
@ -205,8 +206,9 @@ static efi_status_t xen_efi_query_variable_info(u32 attr,
return efi_data(op).status;
}
EXPORT_SYMBOL_GPL(xen_efi_query_variable_info);
static efi_status_t xen_efi_get_next_high_mono_count(u32 *count)
efi_status_t xen_efi_get_next_high_mono_count(u32 *count)
{
struct xen_platform_op op = INIT_EFI_OP(get_next_high_monotonic_count);
@ -217,10 +219,10 @@ static efi_status_t xen_efi_get_next_high_mono_count(u32 *count)
return efi_data(op).status;
}
EXPORT_SYMBOL_GPL(xen_efi_get_next_high_mono_count);
static efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules,
unsigned long count,
unsigned long sg_list)
efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules,
unsigned long count, unsigned long sg_list)
{
struct xen_platform_op op = INIT_EFI_OP(update_capsule);
@ -237,11 +239,11 @@ static efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules,
return efi_data(op).status;
}
EXPORT_SYMBOL_GPL(xen_efi_update_capsule);
static efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules,
unsigned long count,
u64 *max_size,
int *reset_type)
efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules,
unsigned long count, u64 *max_size,
int *reset_type)
{
struct xen_platform_op op = INIT_EFI_OP(query_capsule_capabilities);
@ -260,111 +262,4 @@ static efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules,
return efi_data(op).status;
}
static efi_char16_t vendor[100] __initdata;
static efi_system_table_t efi_systab_xen __initdata = {
.hdr = {
.signature = EFI_SYSTEM_TABLE_SIGNATURE,
.revision = 0, /* Initialized later. */
.headersize = 0, /* Ignored by Linux Kernel. */
.crc32 = 0, /* Ignored by Linux Kernel. */
.reserved = 0
},
.fw_vendor = EFI_INVALID_TABLE_ADDR, /* Initialized later. */
.fw_revision = 0, /* Initialized later. */
.con_in_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
.con_in = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
.con_out_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
.con_out = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
.stderr_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
.stderr = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
.runtime = (efi_runtime_services_t *)EFI_INVALID_TABLE_ADDR,
/* Not used under Xen. */
.boottime = (efi_boot_services_t *)EFI_INVALID_TABLE_ADDR,
/* Not used under Xen. */
.nr_tables = 0, /* Initialized later. */
.tables = EFI_INVALID_TABLE_ADDR /* Initialized later. */
};
static const struct efi efi_xen __initconst = {
.systab = NULL, /* Initialized later. */
.runtime_version = 0, /* Initialized later. */
.mps = EFI_INVALID_TABLE_ADDR,
.acpi = EFI_INVALID_TABLE_ADDR,
.acpi20 = EFI_INVALID_TABLE_ADDR,
.smbios = EFI_INVALID_TABLE_ADDR,
.smbios3 = EFI_INVALID_TABLE_ADDR,
.sal_systab = EFI_INVALID_TABLE_ADDR,
.boot_info = EFI_INVALID_TABLE_ADDR,
.hcdp = EFI_INVALID_TABLE_ADDR,
.uga = EFI_INVALID_TABLE_ADDR,
.uv_systab = EFI_INVALID_TABLE_ADDR,
.fw_vendor = EFI_INVALID_TABLE_ADDR,
.runtime = EFI_INVALID_TABLE_ADDR,
.config_table = EFI_INVALID_TABLE_ADDR,
.get_time = xen_efi_get_time,
.set_time = xen_efi_set_time,
.get_wakeup_time = xen_efi_get_wakeup_time,
.set_wakeup_time = xen_efi_set_wakeup_time,
.get_variable = xen_efi_get_variable,
.get_next_variable = xen_efi_get_next_variable,
.set_variable = xen_efi_set_variable,
.query_variable_info = xen_efi_query_variable_info,
.update_capsule = xen_efi_update_capsule,
.query_capsule_caps = xen_efi_query_capsule_caps,
.get_next_high_mono_count = xen_efi_get_next_high_mono_count,
.reset_system = NULL, /* Functionality provided by Xen. */
.set_virtual_address_map = NULL, /* Not used under Xen. */
.flags = 0 /* Initialized later. */
};
efi_system_table_t __init *xen_efi_probe(void)
{
struct xen_platform_op op = {
.cmd = XENPF_firmware_info,
.u.firmware_info = {
.type = XEN_FW_EFI_INFO,
.index = XEN_FW_EFI_CONFIG_TABLE
}
};
union xenpf_efi_info *info = &op.u.firmware_info.u.efi_info;
if (!xen_initial_domain() || HYPERVISOR_platform_op(&op) < 0)
return NULL;
/* Here we know that Xen runs on EFI platform. */
efi = efi_xen;
efi_systab_xen.tables = info->cfg.addr;
efi_systab_xen.nr_tables = info->cfg.nent;
op.cmd = XENPF_firmware_info;
op.u.firmware_info.type = XEN_FW_EFI_INFO;
op.u.firmware_info.index = XEN_FW_EFI_VENDOR;
info->vendor.bufsz = sizeof(vendor);
set_xen_guest_handle(info->vendor.name, vendor);
if (HYPERVISOR_platform_op(&op) == 0) {
efi_systab_xen.fw_vendor = __pa_symbol(vendor);
efi_systab_xen.fw_revision = info->vendor.revision;
} else
efi_systab_xen.fw_vendor = __pa_symbol(L"UNKNOWN");
op.cmd = XENPF_firmware_info;
op.u.firmware_info.type = XEN_FW_EFI_INFO;
op.u.firmware_info.index = XEN_FW_EFI_VERSION;
if (HYPERVISOR_platform_op(&op) == 0)
efi_systab_xen.hdr.revision = info->version;
op.cmd = XENPF_firmware_info;
op.u.firmware_info.type = XEN_FW_EFI_INFO;
op.u.firmware_info.index = XEN_FW_EFI_RT_VERSION;
if (HYPERVISOR_platform_op(&op) == 0)
efi.runtime_version = info->version;
return &efi_systab_xen;
}
EXPORT_SYMBOL_GPL(xen_efi_query_capsule_caps);

13
drivers/xen/events/events_base.c
View File

@ -895,7 +895,7 @@ static int bind_ipi_to_irq(unsigned int ipi, unsigned int cpu)
irq_set_chip_and_handler_name(irq, &xen_percpu_chip,
handle_percpu_irq, "ipi");
bind_ipi.vcpu = cpu;
bind_ipi.vcpu = xen_vcpu_nr(cpu);
if (HYPERVISOR_event_channel_op(EVTCHNOP_bind_ipi,
&bind_ipi) != 0)
BUG();
@ -991,7 +991,7 @@ int bind_virq_to_irq(unsigned int virq, unsigned int cpu, bool percpu)
handle_edge_irq, "virq");
bind_virq.virq = virq;
bind_virq.vcpu = cpu;
bind_virq.vcpu = xen_vcpu_nr(cpu);
ret = HYPERVISOR_event_channel_op(EVTCHNOP_bind_virq,
&bind_virq);
if (ret == 0)
@ -1211,7 +1211,8 @@ void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector)
#ifdef CONFIG_X86
if (unlikely(vector == XEN_NMI_VECTOR)) {
int rc = HYPERVISOR_vcpu_op(VCPUOP_send_nmi, cpu, NULL);
int rc = HYPERVISOR_vcpu_op(VCPUOP_send_nmi, xen_vcpu_nr(cpu),
NULL);
if (rc < 0)
printk(KERN_WARNING "Sending nmi to CPU%d failed (rc:%d)\n", cpu, rc);
return;
@ -1318,7 +1319,7 @@ static int rebind_irq_to_cpu(unsigned irq, unsigned tcpu)
/* Send future instances of this interrupt to other vcpu. */
bind_vcpu.port = evtchn;
bind_vcpu.vcpu = tcpu;
bind_vcpu.vcpu = xen_vcpu_nr(tcpu);
/*
* Mask the event while changing the VCPU binding to prevent
@ -1458,7 +1459,7 @@ static void restore_cpu_virqs(unsigned int cpu)
/* Get a new binding from Xen. */
bind_virq.virq = virq;
bind_virq.vcpu = cpu;
bind_virq.vcpu = xen_vcpu_nr(cpu);
if (HYPERVISOR_event_channel_op(EVTCHNOP_bind_virq,
&bind_virq) != 0)
BUG();
@ -1482,7 +1483,7 @@ static void restore_cpu_ipis(unsigned int cpu)
BUG_ON(ipi_from_irq(irq) != ipi);
/* Get a new binding from Xen. */
bind_ipi.vcpu = cpu;
bind_ipi.vcpu = xen_vcpu_nr(cpu);
if (HYPERVISOR_event_channel_op(EVTCHNOP_bind_ipi,
&bind_ipi) != 0)
BUG();

2
drivers/xen/events/events_fifo.c
View File

@ -113,7 +113,7 @@ static int init_control_block(int cpu,
init_control.control_gfn = virt_to_gfn(control_block);
init_control.offset = 0;
init_control.vcpu = cpu;
init_control.vcpu = xen_vcpu_nr(cpu);
return HYPERVISOR_event_channel_op(EVTCHNOP_init_control, &init_control);
}

43
drivers/xen/evtchn.c
View File

@ -55,6 +55,7 @@
#include <xen/xen.h>
#include <xen/events.h>
#include <xen/evtchn.h>
#include <xen/xen-ops.h>
#include <asm/xen/hypervisor.h>
struct per_user_data {
@ -73,8 +74,12 @@ struct per_user_data {
wait_queue_head_t evtchn_wait;
struct fasync_struct *evtchn_async_queue;
const char *name;
domid_t restrict_domid;
};
#define UNRESTRICTED_DOMID ((domid_t)-1)
struct user_evtchn {
struct rb_node node;
struct per_user_data *user;
@ -443,12 +448,16 @@ static long evtchn_ioctl(struct file *file,
struct ioctl_evtchn_bind_virq bind;
struct evtchn_bind_virq bind_virq;
rc = -EACCES;
if (u->restrict_domid != UNRESTRICTED_DOMID)
break;
rc = -EFAULT;
if (copy_from_user(&bind, uarg, sizeof(bind)))
break;
bind_virq.virq = bind.virq;
bind_virq.vcpu = 0;
bind_virq.vcpu = xen_vcpu_nr(0);
rc = HYPERVISOR_event_channel_op(EVTCHNOP_bind_virq,
&bind_virq);
if (rc != 0)
@ -468,6 +477,11 @@ static long evtchn_ioctl(struct file *file,
if (copy_from_user(&bind, uarg, sizeof(bind)))
break;
rc = -EACCES;
if (u->restrict_domid != UNRESTRICTED_DOMID &&
u->restrict_domid != bind.remote_domain)
break;
bind_interdomain.remote_dom = bind.remote_domain;
bind_interdomain.remote_port = bind.remote_port;
rc = HYPERVISOR_event_channel_op(EVTCHNOP_bind_interdomain,
@ -485,6 +499,10 @@ static long evtchn_ioctl(struct file *file,
struct ioctl_evtchn_bind_unbound_port bind;
struct evtchn_alloc_unbound alloc_unbound;
rc = -EACCES;
if (u->restrict_domid != UNRESTRICTED_DOMID)
break;
rc = -EFAULT;
if (copy_from_user(&bind, uarg, sizeof(bind)))
break;
@ -553,6 +571,27 @@ static long evtchn_ioctl(struct file *file,
break;
}
case IOCTL_EVTCHN_RESTRICT_DOMID: {
struct ioctl_evtchn_restrict_domid ierd;
rc = -EACCES;
if (u->restrict_domid != UNRESTRICTED_DOMID)
break;
rc = -EFAULT;
if (copy_from_user(&ierd, uarg, sizeof(ierd)))
break;
rc = -EINVAL;
if (ierd.domid == 0 || ierd.domid >= DOMID_FIRST_RESERVED)
break;
u->restrict_domid = ierd.domid;
rc = 0;
break;
}
default:
rc = -ENOSYS;
break;
@ -601,6 +640,8 @@ static int evtchn_open(struct inode *inode, struct file *filp)
mutex_init(&u->ring_cons_mutex);
spin_lock_init(&u->ring_prod_lock);
u->restrict_domid = UNRESTRICTED_DOMID;
filp->private_data = u;
return nonseekable_open(inode, filp);

2
drivers/xen/gntalloc.c
View File

@ -504,7 +504,7 @@ static int gntalloc_mmap(struct file *filp, struct vm_area_struct *vma)
struct gntalloc_file_private_data *priv = filp->private_data;
struct gntalloc_vma_private_data *vm_priv;
struct gntalloc_gref *gref;
int count = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
int count = vma_pages(vma);
int rv, i;
if (!(vma->vm_flags & VM_SHARED)) {

2
drivers/xen/gntdev.c
View File

@ -982,7 +982,7 @@ static int gntdev_mmap(struct file *flip, struct vm_area_struct *vma)
{
struct gntdev_priv *priv = flip->private_data;
int index = vma->vm_pgoff;
int count = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
int count = vma_pages(vma);
struct grant_map *map;
int i, err = -EINVAL;

2
drivers/xen/privcmd.c
View File

@ -582,7 +582,7 @@ static long privcmd_ioctl(struct file *file,
static void privcmd_close(struct vm_area_struct *vma)
{
struct page **pages = vma->vm_private_data;
int numpgs = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
int numpgs = vma_pages(vma);
int numgfns = (vma->vm_end - vma->vm_start) >> XEN_PAGE_SHIFT;
int rc;

50
drivers/xen/time.c
View File

@ -6,6 +6,7 @@
#include <linux/math64.h>
#include <linux/gfp.h>
#include <asm/paravirt.h>
#include <asm/xen/hypervisor.h>
#include <asm/xen/hypercall.h>
@ -46,27 +47,31 @@ static u64 get64(const u64 *p)
return ret;
}
/*
* Runstate accounting
*/
void xen_get_runstate_snapshot(struct vcpu_runstate_info *res)
static void xen_get_runstate_snapshot_cpu(struct vcpu_runstate_info *res,
unsigned int cpu)
{
u64 state_time;
struct vcpu_runstate_info *state;
BUG_ON(preemptible());
state = this_cpu_ptr(&xen_runstate);
state = per_cpu_ptr(&xen_runstate, cpu);
/*
* The runstate info is always updated by the hypervisor on
* the current CPU, so there's no need to use anything
* stronger than a compiler barrier when fetching it.
*/
do {
state_time = get64(&state->state_entry_time);
rmb(); /* Hypervisor might update data. */
*res = READ_ONCE(*state);
} while (get64(&state->state_entry_time) != state_time);
rmb(); /* Hypervisor might update data. */
} while (get64(&state->state_entry_time) != state_time ||
(state_time & XEN_RUNSTATE_UPDATE));
}
/*
* Runstate accounting
*/
void xen_get_runstate_snapshot(struct vcpu_runstate_info *res)
{
xen_get_runstate_snapshot_cpu(res, smp_processor_id());
}
/* return true when a vcpu could run but has no real cpu to run on */
@ -75,6 +80,14 @@ bool xen_vcpu_stolen(int vcpu)
return per_cpu(xen_runstate, vcpu).state == RUNSTATE_runnable;
}
u64 xen_steal_clock(int cpu)
{
struct vcpu_runstate_info state;
xen_get_runstate_snapshot_cpu(&state, cpu);
return state.time[RUNSTATE_runnable] + state.time[RUNSTATE_offline];
}
void xen_setup_runstate_info(int cpu)
{
struct vcpu_register_runstate_memory_area area;
@ -82,7 +95,20 @@ void xen_setup_runstate_info(int cpu)
area.addr.v = &per_cpu(xen_runstate, cpu);
if (HYPERVISOR_vcpu_op(VCPUOP_register_runstate_memory_area,
cpu, &area))
xen_vcpu_nr(cpu), &area))
BUG();
}
void __init xen_time_setup_guest(void)
{
bool xen_runstate_remote;
xen_runstate_remote = !HYPERVISOR_vm_assist(VMASST_CMD_enable,
VMASST_TYPE_runstate_update_flag);
pv_time_ops.steal_clock = xen_steal_clock;
static_key_slow_inc(&paravirt_steal_enabled);
if (xen_runstate_remote)
static_key_slow_inc(&paravirt_steal_rq_enabled);
}

22
drivers/xen/xen-pciback/conf_space.c
View File

@ -148,7 +148,7 @@ int xen_pcibk_config_read(struct pci_dev *dev, int offset, int size,
struct xen_pcibk_dev_data *dev_data = pci_get_drvdata(dev);
const struct config_field_entry *cfg_entry;
const struct config_field *field;
int req_start, req_end, field_start, field_end;
int field_start, field_end;
/* if read fails for any reason, return 0
* (as if device didn't respond) */
u32 value = 0, tmp_val;
@ -178,12 +178,10 @@ int xen_pcibk_config_read(struct pci_dev *dev, int offset, int size,
list_for_each_entry(cfg_entry, &dev_data->config_fields, list) {
field = cfg_entry->field;
req_start = offset;
req_end = offset + size;
field_start = OFFSET(cfg_entry);
field_end = OFFSET(cfg_entry) + field->size;
if (req_end > field_start && field_end > req_start) {
if (offset + size > field_start && field_end > offset) {
err = conf_space_read(dev, cfg_entry, field_start,
&tmp_val);
if (err)
@ -191,7 +189,7 @@ int xen_pcibk_config_read(struct pci_dev *dev, int offset, int size,
value = merge_value(value, tmp_val,
get_mask(field->size),
field_start - req_start);
field_start - offset);
}
}
@ -211,7 +209,7 @@ int xen_pcibk_config_write(struct pci_dev *dev, int offset, int size, u32 value)
const struct config_field_entry *cfg_entry;
const struct config_field *field;
u32 tmp_val;
int req_start, req_end, field_start, field_end;
int field_start, field_end;
if (unlikely(verbose_request))
printk(KERN_DEBUG
@ -224,21 +222,17 @@ int xen_pcibk_config_write(struct pci_dev *dev, int offset, int size, u32 value)
list_for_each_entry(cfg_entry, &dev_data->config_fields, list) {
field = cfg_entry->field;
req_start = offset;
req_end = offset + size;
field_start = OFFSET(cfg_entry);
field_end = OFFSET(cfg_entry) + field->size;
if (req_end > field_start && field_end > req_start) {
tmp_val = 0;
err = xen_pcibk_config_read(dev, field_start,
field->size, &tmp_val);
if (offset + size > field_start && field_end > offset) {
err = conf_space_read(dev, cfg_entry, field_start,
&tmp_val);
if (err)
break;
tmp_val = merge_value(tmp_val, value, get_mask(size),
req_start - field_start);
offset - field_start);
err = conf_space_write(dev, cfg_entry, field_start,
tmp_val);

57
drivers/xen/xen-pciback/conf_space_header.c
View File

@ -209,58 +209,35 @@ static int bar_read(struct pci_dev *dev, int offset, u32 * value, void *data)
return 0;
}
static inline void read_dev_bar(struct pci_dev *dev,
struct pci_bar_info *bar_info, int offset,
u32 len_mask)
static void *bar_init(struct pci_dev *dev, int offset)
{
int pos;
struct resource *res = dev->resource;
unsigned int pos;
const struct resource *res = dev->resource;
struct pci_bar_info *bar = kzalloc(sizeof(*bar), GFP_KERNEL);
if (!bar)
return ERR_PTR(-ENOMEM);
if (offset == PCI_ROM_ADDRESS || offset == PCI_ROM_ADDRESS1)
pos = PCI_ROM_RESOURCE;
else {
pos = (offset - PCI_BASE_ADDRESS_0) / 4;
if (pos && ((res[pos - 1].flags & (PCI_BASE_ADDRESS_SPACE |
PCI_BASE_ADDRESS_MEM_TYPE_MASK)) ==
(PCI_BASE_ADDRESS_SPACE_MEMORY |
PCI_BASE_ADDRESS_MEM_TYPE_64))) {
bar_info->val = res[pos - 1].start >> 32;
bar_info->len_val = -resource_size(&res[pos - 1]) >> 32;
return;
if (pos && (res[pos - 1].flags & IORESOURCE_MEM_64)) {
bar->val = res[pos - 1].start >> 32;
bar->len_val = -resource_size(&res[pos - 1]) >> 32;
return bar;
}
}
if (!res[pos].flags ||
(res[pos].flags & (IORESOURCE_DISABLED | IORESOURCE_UNSET |
IORESOURCE_BUSY)))
return;
return bar;
bar_info->val = res[pos].start |
(res[pos].flags & PCI_REGION_FLAG_MASK);
bar_info->len_val = -resource_size(&res[pos]) |
(res[pos].flags & PCI_REGION_FLAG_MASK);
}
static void *bar_init(struct pci_dev *dev, int offset)
{
struct pci_bar_info *bar = kzalloc(sizeof(*bar), GFP_KERNEL);
if (!bar)
return ERR_PTR(-ENOMEM);
read_dev_bar(dev, bar, offset, ~0);
return bar;
}
static void *rom_init(struct pci_dev *dev, int offset)
{
struct pci_bar_info *bar = kzalloc(sizeof(*bar), GFP_KERNEL);
if (!bar)
return ERR_PTR(-ENOMEM);
read_dev_bar(dev, bar, offset, ~PCI_ROM_ADDRESS_ENABLE);
bar->val = res[pos].start |
(res[pos].flags & PCI_REGION_FLAG_MASK);
bar->len_val = -resource_size(&res[pos]) |
(res[pos].flags & PCI_REGION_FLAG_MASK);
return bar;
}
@ -383,7 +360,7 @@ static const struct config_field header_common[] = {
{ \
.offset = reg_offset, \
.size = 4, \
.init = rom_init, \
.init = bar_init, \
.reset = bar_reset, \
.release = bar_release, \
.u.dw.read = bar_read, \

1
drivers/xen/xen-pciback/pciback.h
View File

@ -55,7 +55,6 @@ struct xen_pcibk_dev_data {
/* Used by XenBus and xen_pcibk_ops.c */
extern wait_queue_head_t xen_pcibk_aer_wait_queue;
extern struct workqueue_struct *xen_pcibk_wq;
/* Used by pcistub.c and conf_space_quirks.c */
extern struct list_head xen_pcibk_quirks;

2
drivers/xen/xen-pciback/pciback_ops.c
View File

@ -310,7 +310,7 @@ void xen_pcibk_test_and_schedule_op(struct xen_pcibk_device *pdev)
* already processing a request */
if (test_bit(_XEN_PCIF_active, (unsigned long *)&pdev->sh_info->flags)
&& !test_and_set_bit(_PDEVF_op_active, &pdev->flags)) {
queue_work(xen_pcibk_wq, &pdev->op_work);
schedule_work(&pdev->op_work);
}
/*_XEN_PCIB_active should have been cleared by pcifront. And also make
sure xen_pcibk is waiting for ack by checking _PCIB_op_pending*/

10
drivers/xen/xen-pciback/xenbus.c
View File

@ -17,7 +17,6 @@
#include "pciback.h"
#define INVALID_EVTCHN_IRQ (-1)
struct workqueue_struct *xen_pcibk_wq;
static bool __read_mostly passthrough;
module_param(passthrough, bool, S_IRUGO);
@ -76,8 +75,7 @@ static void xen_pcibk_disconnect(struct xen_pcibk_device *pdev)
/* If the driver domain started an op, make sure we complete it
* before releasing the shared memory */
/* Note, the workqueue does not use spinlocks at all.*/
flush_workqueue(xen_pcibk_wq);
flush_work(&pdev->op_work);
if (pdev->sh_info != NULL) {
xenbus_unmap_ring_vfree(pdev->xdev, pdev->sh_info);
@ -733,11 +731,6 @@ const struct xen_pcibk_backend *__read_mostly xen_pcibk_backend;
int __init xen_pcibk_xenbus_register(void)
{
xen_pcibk_wq = create_workqueue("xen_pciback_workqueue");
if (!xen_pcibk_wq) {
pr_err("%s: create xen_pciback_workqueue failed\n", __func__);
return -EFAULT;
}
xen_pcibk_backend = &xen_pcibk_vpci_backend;
if (passthrough)
xen_pcibk_backend = &xen_pcibk_passthrough_backend;
@ -747,6 +740,5 @@ int __init xen_pcibk_xenbus_register(void)
void __exit xen_pcibk_xenbus_unregister(void)
{
destroy_workqueue(xen_pcibk_wq);
xenbus_unregister_driver(&xen_pcibk_driver);
}

15
drivers/xen/xenbus/xenbus_probe_frontend.c
View File

@ -31,7 +31,6 @@
#include "xenbus_probe.h"
static struct workqueue_struct *xenbus_frontend_wq;
/* device/<type>/<id> => <type>-<id> */
static int frontend_bus_id(char bus_id[XEN_BUS_ID_SIZE], const char *nodename)
@ -109,13 +108,7 @@ static int xenbus_frontend_dev_resume(struct device *dev)
if (xen_store_domain_type == XS_LOCAL) {
struct xenbus_device *xdev = to_xenbus_device(dev);
if (!xenbus_frontend_wq) {
pr_err("%s: no workqueue to process delayed resume\n",
xdev->nodename);
return -EFAULT;
}
queue_work(xenbus_frontend_wq, &xdev->work);
schedule_work(&xdev->work);
return 0;
}
@ -485,12 +478,6 @@ static int __init xenbus_probe_frontend_init(void)
register_xenstore_notifier(&xenstore_notifier);
if (xen_store_domain_type == XS_LOCAL) {
xenbus_frontend_wq = create_workqueue("xenbus_frontend");
if (!xenbus_frontend_wq)
pr_warn("create xenbus frontend workqueue failed, S3 resume is likely to fail\n");
}
return 0;
}
subsys_initcall(xenbus_probe_frontend_init);

77
drivers/xen/xlate_mmu.c
View File

@ -29,6 +29,8 @@
*/
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <asm/xen/hypercall.h>
#include <asm/xen/hypervisor.h>
@ -37,6 +39,7 @@
#include <xen/page.h>
#include <xen/interface/xen.h>
#include <xen/interface/memory.h>
#include <xen/balloon.h>
typedef void (*xen_gfn_fn_t)(unsigned long gfn, void *data);
@ -185,3 +188,77 @@ int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
return 0;
}
EXPORT_SYMBOL_GPL(xen_xlate_unmap_gfn_range);
struct map_balloon_pages {
xen_pfn_t *pfns;
unsigned int idx;
};
static void setup_balloon_gfn(unsigned long gfn, void *data)
{
struct map_balloon_pages *info = data;
info->pfns[info->idx++] = gfn;
}
/**
* xen_xlate_map_ballooned_pages - map a new set of ballooned pages
* @gfns: returns the array of corresponding GFNs
* @virt: returns the virtual address of the mapped region
* @nr_grant_frames: number of GFNs
* @return 0 on success, error otherwise
*
* This allocates a set of ballooned pages and maps them into the
* kernel's address space.
*/
int __init xen_xlate_map_ballooned_pages(xen_pfn_t **gfns, void **virt,
unsigned long nr_grant_frames)
{
struct page **pages;
xen_pfn_t *pfns;
void *vaddr;
struct map_balloon_pages data;
int rc;
unsigned long nr_pages;
BUG_ON(nr_grant_frames == 0);
nr_pages = DIV_ROUND_UP(nr_grant_frames, XEN_PFN_PER_PAGE);
pages = kcalloc(nr_pages, sizeof(pages[0]), GFP_KERNEL);
if (!pages)
return -ENOMEM;
pfns = kcalloc(nr_grant_frames, sizeof(pfns[0]), GFP_KERNEL);
if (!pfns) {
kfree(pages);
return -ENOMEM;
}
rc = alloc_xenballooned_pages(nr_pages, pages);
if (rc) {
pr_warn("%s Couldn't balloon alloc %ld pages rc:%d\n", __func__,
nr_pages, rc);
kfree(pages);
kfree(pfns);
return rc;
}
data.pfns = pfns;
data.idx = 0;
xen_for_each_gfn(pages, nr_grant_frames, setup_balloon_gfn, &data);
vaddr = vmap(pages, nr_pages, 0, PAGE_KERNEL);
if (!vaddr) {
pr_warn("%s Couldn't map %ld pages rc:%d\n", __func__,
nr_pages, rc);
free_xenballooned_pages(nr_pages, pages);
kfree(pages);
kfree(pfns);
return -ENOMEM;
}
kfree(pages);
*gfns = pfns;
*virt = vaddr;
return 0;
}
EXPORT_SYMBOL_GPL(xen_xlate_map_ballooned_pages);

1
include/linux/kernel_stat.h
View File

@ -92,7 +92,6 @@ static inline void account_process_tick(struct task_struct *tsk, int user)
extern void account_process_tick(struct task_struct *, int user);
#endif
extern void account_steal_ticks(unsigned long ticks);
extern void account_idle_ticks(unsigned long ticks);
#endif /* _LINUX_KERNEL_STAT_H */

2
include/linux/of_fdt.h
View File

@ -53,6 +53,8 @@ extern char __dtb_end[];
extern int of_scan_flat_dt(int (*it)(unsigned long node, const char *uname,
int depth, void *data),
void *data);
extern int of_get_flat_dt_subnode_by_name(unsigned long node,
const char *uname);
extern const void *of_get_flat_dt_prop(unsigned long node, const char *name,
int *size);
extern int of_flat_dt_is_compatible(unsigned long node, const char *name);

15
include/uapi/xen/evtchn.h
View File

@ -85,4 +85,19 @@ struct ioctl_evtchn_notify {
#define IOCTL_EVTCHN_RESET \
_IOC(_IOC_NONE, 'E', 5, 0)
/*
* Restrict this file descriptor so that it can only be used to bind
* new interdomain events from one domain.
*
* Once a file descriptor has been restricted it cannot be
* de-restricted, and must be closed and re-opened. Event channels
* which were bound before restricting remain bound afterwards, and
* can be notified as usual.
*/
#define IOCTL_EVTCHN_RESTRICT_DOMID \
_IOC(_IOC_NONE, 'E', 6, sizeof(struct ioctl_evtchn_restrict_domid))
struct ioctl_evtchn_restrict_domid {
domid_t domid;
};
#endif /* __LINUX_PUBLIC_EVTCHN_H__ */

40
include/xen/interface/hvm/params.h
View File

@ -27,16 +27,44 @@
* Parameter space for HVMOP_{set,get}_param.
*/
#define HVM_PARAM_CALLBACK_IRQ 0
/*
* How should CPU0 event-channel notifications be delivered?
* val[63:56] == 0: val[55:0] is a delivery GSI (Global System Interrupt).
* val[63:56] == 1: val[55:0] is a delivery PCI INTx line, as follows:
* Domain = val[47:32], Bus = val[31:16],
* DevFn = val[15: 8], IntX = val[ 1: 0]
* val[63:56] == 2: val[7:0] is a vector number.
*
* If val == 0 then CPU0 event-channel notifications are not delivered.
* If val != 0, val[63:56] encodes the type, as follows:
*/
#define HVM_PARAM_CALLBACK_IRQ 0
#define HVM_PARAM_CALLBACK_TYPE_GSI 0
/*
* val[55:0] is a delivery GSI. GSI 0 cannot be used, as it aliases val == 0,
* and disables all notifications.
*/
#define HVM_PARAM_CALLBACK_TYPE_PCI_INTX 1
/*
* val[55:0] is a delivery PCI INTx line:
* Domain = val[47:32], Bus = val[31:16] DevFn = val[15:8], IntX = val[1:0]
*/
#if defined(__i386__) || defined(__x86_64__)
#define HVM_PARAM_CALLBACK_TYPE_VECTOR 2
/*
* val[7:0] is a vector number. Check for XENFEAT_hvm_callback_vector to know
* if this delivery method is available.
*/
#elif defined(__arm__) || defined(__aarch64__)
#define HVM_PARAM_CALLBACK_TYPE_PPI 2
/*
* val[55:16] needs to be zero.
* val[15:8] is interrupt flag of the PPI used by event-channel:
* bit 8: the PPI is edge(1) or level(0) triggered
* bit 9: the PPI is active low(1) or high(0)
* val[7:0] is a PPI number used by event-channel.
* This is only used by ARM/ARM64 and masking/eoi the interrupt associated to
* the notification is handled by the interrupt controller.
*/
#endif
#define HVM_PARAM_STORE_PFN 1
#define HVM_PARAM_STORE_EVTCHN 2

1
include/xen/interface/memory.h
View File

@ -160,6 +160,7 @@ DEFINE_GUEST_HANDLE_STRUCT(xen_machphys_mapping_t);
#define XENMAPSPACE_gmfn_foreign 4 /* GMFN from another dom,
* XENMEM_add_to_physmap_range only.
*/
#define XENMAPSPACE_dev_mmio 5 /* device mmio region */
/*
* Sets the GPFN at which a particular page appears in the specified guest's

24
include/xen/interface/vcpu.h
View File

@ -75,15 +75,21 @@
*/
#define VCPUOP_get_runstate_info 4
struct vcpu_runstate_info {
/* VCPU's current state (RUNSTATE_*). */
int state;
/* When was current state entered (system time, ns)? */
uint64_t state_entry_time;
/*
* Time spent in each RUNSTATE_* (ns). The sum of these times is
* guaranteed not to drift from system time.
*/
uint64_t time[4];
/* VCPU's current state (RUNSTATE_*). */
int state;
/* When was current state entered (system time, ns)? */
uint64_t state_entry_time;
/*
* Update indicator set in state_entry_time:
* When activated via VMASST_TYPE_runstate_update_flag, set during
* updates in guest memory mapped copy of vcpu_runstate_info.
*/
#define XEN_RUNSTATE_UPDATE (1ULL << 63)
/*
* Time spent in each RUNSTATE_* (ns). The sum of these times is
* guaranteed not to drift from system time.
*/
uint64_t time[4];
};
DEFINE_GUEST_HANDLE_STRUCT(vcpu_runstate_info);

17
include/xen/interface/xen.h
View File

@ -413,7 +413,22 @@ DEFINE_GUEST_HANDLE_STRUCT(mmuext_op);
/* x86/PAE guests: support PDPTs above 4GB. */
#define VMASST_TYPE_pae_extended_cr3 3
#define MAX_VMASST_TYPE 3
/*
* x86 guests: Sane behaviour for virtual iopl
* - virtual iopl updated from do_iret() hypercalls.
* - virtual iopl reported in bounce frames.
* - guest kernels assumed to be level 0 for the purpose of iopl checks.
*/
#define VMASST_TYPE_architectural_iopl 4
/*
* All guests: activate update indicator in vcpu_runstate_info
* Enable setting the XEN_RUNSTATE_UPDATE flag in guest memory mapped
* vcpu_runstate_info during updates of the runstate information.
*/
#define VMASST_TYPE_runstate_update_flag 5
#define MAX_VMASST_TYPE 5
#ifndef __ASSEMBLY__

40
include/xen/xen-ops.h
View File

@ -9,6 +9,12 @@
DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu);
DECLARE_PER_CPU(int, xen_vcpu_id);
static inline int xen_vcpu_nr(int cpu)
{
return per_cpu(xen_vcpu_id, cpu);
}
void xen_arch_pre_suspend(void);
void xen_arch_post_suspend(int suspend_cancelled);
@ -21,7 +27,9 @@ void xen_resume_notifier_unregister(struct notifier_block *nb);
bool xen_vcpu_stolen(int vcpu);
void xen_setup_runstate_info(int cpu);
void xen_time_setup_guest(void);
void xen_get_runstate_snapshot(struct vcpu_runstate_info *res);
u64 xen_steal_clock(int cpu);
int xen_setup_shutdown_event(void);
@ -85,17 +93,33 @@ int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
struct page **pages);
int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
int nr, struct page **pages);
int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr,
unsigned long nr_grant_frames);
bool xen_running_on_version_or_later(unsigned int major, unsigned int minor);
#ifdef CONFIG_XEN_EFI
extern efi_system_table_t *xen_efi_probe(void);
#else
static inline efi_system_table_t __init *xen_efi_probe(void)
{
return NULL;
}
#endif
efi_status_t xen_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc);
efi_status_t xen_efi_set_time(efi_time_t *tm);
efi_status_t xen_efi_get_wakeup_time(efi_bool_t *enabled, efi_bool_t *pending,
efi_time_t *tm);
efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm);
efi_status_t xen_efi_get_variable(efi_char16_t *name, efi_guid_t *vendor,
u32 *attr, unsigned long *data_size,
void *data);
efi_status_t xen_efi_get_next_variable(unsigned long *name_size,
efi_char16_t *name, efi_guid_t *vendor);
efi_status_t xen_efi_set_variable(efi_char16_t *name, efi_guid_t *vendor,
u32 attr, unsigned long data_size,
void *data);
efi_status_t xen_efi_query_variable_info(u32 attr, u64 *storage_space,
u64 *remaining_space,
u64 *max_variable_size);
efi_status_t xen_efi_get_next_high_mono_count(u32 *count);
efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules,
unsigned long count, unsigned long sg_list);
efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules,
unsigned long count, u64 *max_size,
int *reset_type);
#ifdef CONFIG_PREEMPT

10
kernel/sched/cputime.c
View File

@ -502,16 +502,6 @@ void account_process_tick(struct task_struct *p, int user_tick)
account_idle_time(cputime);
}
/*
* Account multiple ticks of steal time.
* @p: the process from which the cpu time has been stolen
* @ticks: number of stolen ticks
*/
void account_steal_ticks(unsigned long ticks)
{
account_steal_time(jiffies_to_cputime(ticks));
}
/*
* Account multiple ticks of idle time.
* @ticks: number of stolen ticks