Kirill A. Shutemov 23e5d9ec2b x86/mm/iommu/sva: Make LAM and SVA mutually exclusive ... IOMMU and SVA-capable devices know nothing about LAM and only expect canonical addresses. An attempt to pass down tagged pointer will lead to address translation failure. By default do not allow to enable both LAM and use SVA in the same process. The new ARCH_FORCE_TAGGED_SVA arch_prctl() overrides the limitation. By using the arch_prctl() userspace takes responsibility to never pass tagged address to the device. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Ashok Raj <ashok.raj@intel.com> Reviewed-by: Jacob Pan <jacob.jun.pan@linux.intel.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/all/20230312112612.31869-12-kirill.shutemov%40linux.intel.com		2023-03-16 13:08:40 -07:00
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asm	x86/mm/iommu/sva: Make LAM and SVA mutually exclusive	2023-03-16 13:08:40 -07:00
uapi/asm	x86/mm/iommu/sva: Make LAM and SVA mutually exclusive	2023-03-16 13:08:40 -07:00