diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2022-03-21 20:28:13 +0100 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-03-21 20:28:13 +0100 |
commit | 3fd33273a4675e819544ccbbf8d769e14672666b (patch) | |
tree | de1dc2f55a4d6f6445ac622eb67ed89103574403 /arch/arm/boot/dts/rk322x.dtsi | |
parent | Merge tag 'x86_cleanups_for_v5.18_rc1' of git://git.kernel.org/pub/scm/linux/... (diff) | |
parent | Documentation/x86: Update documentation for SVA (Shared Virtual Addressing) (diff) | |
download | linux-3fd33273a4675e819544ccbbf8d769e14672666b.tar.xz linux-3fd33273a4675e819544ccbbf8d769e14672666b.zip |
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
Diffstat (limited to 'arch/arm/boot/dts/rk322x.dtsi')
0 files changed, 0 insertions, 0 deletions