linux/drivers/iommu
Linus Torvalds 3fd33273a4 Reenable ENQCMD/PASID support:
- Simplify the PASID handling to allocate the PASID once, associate it to
    the mm of a process and free it on mm_exit(). The previous attempt of
    refcounted PASIDs and dynamic alloc()/free() turned out to be error
    prone and too complex. The PASID space is 20bits, so the case of
    resource exhaustion is a pure academic concern.
 
  - Populate the PASID MSR on demand via #GP to avoid racy updates via IPIs.
 
  - Reenable ENQCMD and let objtool check for the forbidden usage of ENQCMD
    in the kernel.
 
  - Update the documentation for Shared Virtual Addressing accordingly.
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Merge tag 'x86-pasid-2022-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 PASID support from Thomas Gleixner:
 "Reenable ENQCMD/PASID support:

   - Simplify the PASID handling to allocate the PASID once, associate
     it to the mm of a process and free it on mm_exit().

     The previous attempt of refcounted PASIDs and dynamic
     alloc()/free() turned out to be error prone and too complex. The
     PASID space is 20bits, so the case of resource exhaustion is a pure
     academic concern.

   - Populate the PASID MSR on demand via #GP to avoid racy updates via
     IPIs.

   - Reenable ENQCMD and let objtool check for the forbidden usage of
     ENQCMD in the kernel.

   - Update the documentation for Shared Virtual Addressing accordingly"

* tag 'x86-pasid-2022-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  Documentation/x86: Update documentation for SVA (Shared Virtual Addressing)
  tools/objtool: Check for use of the ENQCMD instruction in the kernel
  x86/cpufeatures: Re-enable ENQCMD
  x86/traps: Demand-populate PASID MSR via #GP
  sched: Define and initialize a flag to identify valid PASID in the task
  x86/fpu: Clear PASID when copying fpstate
  iommu/sva: Assign a PASID to mm on PASID allocation and free it on mm exit
  kernel/fork: Initialize mm's PASID
  iommu/ioasid: Introduce a helper to check for valid PASIDs
  mm: Change CONFIG option for mm->pasid field
  iommu/sva: Rename CONFIG_IOMMU_SVA_LIB to CONFIG_IOMMU_SVA
2022-03-21 12:28:13 -07:00
..
amd iommu/amd: Fix I/O page table memory leak 2022-02-14 12:52:40 +01:00
arm iommu/sva: Assign a PASID to mm on PASID allocation and free it on mm exit 2022-02-15 11:31:35 +01:00
intel Reenable ENQCMD/PASID support: 2022-03-21 12:28:13 -07:00
apple-dart.c pci-v5.16-changes 2021-11-06 14:36:12 -07:00
dma-iommu.c iommu: Move flush queue data into iommu_dma_cookie 2021-12-20 09:03:05 +01:00
exynos-iommu.c iommu/exynos: Drop IOVA cookie management 2021-08-18 13:25:31 +02:00
fsl_pamu_domain.c iommu: Streamline registration interface 2021-04-16 17:20:45 +02:00
fsl_pamu_domain.h iommu/fsl_pamu: remove the snoop_id field 2021-04-07 10:56:52 +02:00
fsl_pamu.c iommu/fsl_pamu: hardcode the window address and size in pamu_config_ppaace 2021-04-07 10:56:52 +02:00
fsl_pamu.h iommu/fsl_pamu: hardcode the window address and size in pamu_config_ppaace 2021-04-07 10:56:52 +02:00
hyperv-iommu.c iommu/hyperv: setup an IO-APIC IRQ remapping domain for root partition 2021-02-11 08:47:07 +00:00
io-pgfault.c iommu: Add a page fault handler 2021-04-07 10:54:29 +02:00
io-pgtable-arm-v7s.c iommu/io-pgtable-arm-v7s: Add error handle for page table allocation failure 2021-12-14 14:45:35 +00:00
io-pgtable-arm.c iommu/io-pgtable-arm: Fix table descriptor paddr formatting 2021-12-06 13:03:01 +01:00
io-pgtable-arm.h iommu/io-pgtable-arm: Move some definitions to a header 2020-09-28 23:48:06 +01:00
io-pgtable.c iommu/io-pgtable: Add DART pagetable format 2021-08-12 13:15:02 +02:00
ioasid.c iommu/sva: Assign a PASID to mm on PASID allocation and free it on mm exit 2022-02-15 11:31:35 +01:00
iommu-debugfs.c
iommu-sva-lib.c iommu/sva: Assign a PASID to mm on PASID allocation and free it on mm exit 2022-02-15 11:31:35 +01:00
iommu-sva-lib.h iommu/sva: Assign a PASID to mm on PASID allocation and free it on mm exit 2022-02-15 11:31:35 +01:00
iommu-sysfs.c
iommu-traces.c
iommu.c iommu: Fix some W=1 warnings 2022-01-31 16:49:54 +01:00
iova.c iommu: Move flush queue data into iommu_dma_cookie 2021-12-20 09:03:05 +01:00
ipmmu-vmsa.c iommu/ipmmu-vmsa: Hook up r8a77980 DT matching code 2021-09-28 11:43:50 +02:00
irq_remapping.c x86: Kill all traces of irq_remapping_get_irq_domain() 2020-10-28 20:26:28 +01:00
irq_remapping.h x86: Kill all traces of irq_remapping_get_irq_domain() 2020-10-28 20:26:28 +01:00
Kconfig iommu/sva: Rename CONFIG_IOMMU_SVA_LIB to CONFIG_IOMMU_SVA 2022-02-14 19:17:46 +01:00
Makefile iommu/sva: Rename CONFIG_IOMMU_SVA_LIB to CONFIG_IOMMU_SVA 2022-02-14 19:17:46 +01:00
msm_iommu_hw-8xxx.h
msm_iommu.c iommu: Drop unnecessary of_iommu.h includes 2021-06-08 14:15:46 +02:00
msm_iommu.h
mtk_iommu_v1.c iommu/mtk: Drop IOVA cookie management 2021-08-18 13:25:32 +02:00
mtk_iommu.c iommu/mediatek: Fix out-of-range warning with clang 2021-09-28 11:59:11 +02:00
mtk_iommu.h iommu/mediatek: Add mt8192 support 2021-02-01 11:31:19 +00:00
of_iommu.c iommu: Remove unused of_get_dma_window() 2021-06-08 14:15:46 +02:00
omap-iommu-debug.c iommu/omap: Check for failure of a call to omap_iommu_dump_ctx 2020-07-22 15:02:33 +02:00
omap-iommu.c iommu: Fix some W=1 warnings 2022-01-31 16:49:54 +01:00
omap-iommu.h
omap-iopgtable.h
rockchip-iommu.c iommu/rockchip: Fix PAGE_DESC_HI_MASKs for RK3568 2021-11-26 22:54:20 +01:00
s390-iommu.c s390/pci: use physical addresses in DMA tables 2021-12-06 14:42:26 +01:00
sprd-iommu.c iommu/sprd: Drop IOVA cookie management 2021-08-18 13:25:32 +02:00
sun50i-iommu.c iommu/sun50i: Drop IOVA cookie management 2021-08-18 13:25:32 +02:00
tegra-gart.c iommu: Streamline registration interface 2021-04-16 17:20:45 +02:00
tegra-smmu.c iommu/tegra-smmu: Fix missing put_device() call in tegra_smmu_find 2022-02-28 14:01:57 +01:00
virtio-iommu.c virtio,vdpa,qemu_fw_cfg: features, cleanups, fixes 2022-01-18 10:05:48 +02:00