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authorLinus Torvalds <torvalds@linux-foundation.org>2022-03-21 20:28:13 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2022-03-21 20:28:13 +0100
commit3fd33273a4675e819544ccbbf8d769e14672666b (patch)
treede1dc2f55a4d6f6445ac622eb67ed89103574403 /arch/arm/boot/dts/rk322x.dtsi
parentMerge tag 'x86_cleanups_for_v5.18_rc1' of git://git.kernel.org/pub/scm/linux/... (diff)
parentDocumentation/x86: Update documentation for SVA (Shared Virtual Addressing) (diff)
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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
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