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22b8cc3e78
to ARM's Top Byte Ignore and allows userspace to store metadata in some bits of pointers without masking it out before use. -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEV76QKkVc4xCGURexaDWVMHDJkrAFAmRK/WIACgkQaDWVMHDJ krAL+RAAw33EhsWyYVkeAtYmYBKkGvlgeSDULtfJKe5bynJBTHkGKfM6RE9MSJIt 5fHWaConGh8HNpy0Us1sDvd/aWcWRm5h7ZcCVD+R4qrgh/vc7ULzM+elXe5jzr4W cyuTckF2eW6SVrYg6fH5q+6Uy/moDtrdkLRvwRBf+AYeepB8gvSSH5XixKDNiVBE pjNy1xXVZQokqD4tjsFelmLttyacR5OabiE/aeVNoFYf9yTwfnN8N3T6kwuOoS4l Lp6NA+/0ux+oBlR+Is+JJG8Mxrjvz96yJGZYdR2YP5k3bMQtHAAjuq2w+GgqZm5i j3/E6KQepEGaCfC+bHl68xy/kKx8ik+jMCEcBalCC25J3uxbLz41g6K3aI890wJn +5ZtfcmoDUk9pnUyLxR8t+UjOSBFAcRSUE+FTjUH1qEGsMPK++9a4iLXz5vYVK1+ +YCt1u5LNJbkDxE8xVX3F5jkXh0G01SJsuUVAOqHSNfqSNmohFK8/omqhVRrRqoK A7cYLtnOGiUXLnvjrwSxPNOzRrG+GAwqaw8gwOTaYogETWbTY8qsSCEVl204uYwd m8io9rk2ZXUdDuha56xpBbPE0JHL9hJ2eKCuPkfvRgJT9YFyTh+e0UdX20k+nDjc ang1S350o/Y0sus6rij1qS8AuxJIjHucG0GdgpZk3KUbcxoRLhI= =qitk -----END PGP SIGNATURE----- Merge tag 'x86_mm_for_6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 LAM (Linear Address Masking) support from Dave Hansen: "Add support for the new Linear Address Masking CPU feature. This is similar to ARM's Top Byte Ignore and allows userspace to store metadata in some bits of pointers without masking it out before use" * tag 'x86_mm_for_6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/mm/iommu/sva: Do not allow to set FORCE_TAGGED_SVA bit from outside x86/mm/iommu/sva: Fix error code for LAM enabling failure due to SVA selftests/x86/lam: Add test cases for LAM vs thread creation selftests/x86/lam: Add ARCH_FORCE_TAGGED_SVA test cases for linear-address masking selftests/x86/lam: Add inherit test cases for linear-address masking selftests/x86/lam: Add io_uring test cases for linear-address masking selftests/x86/lam: Add mmap and SYSCALL test cases for linear-address masking selftests/x86/lam: Add malloc and tag-bits test cases for linear-address masking x86/mm/iommu/sva: Make LAM and SVA mutually exclusive iommu/sva: Replace pasid_valid() helper with mm_valid_pasid() mm: Expose untagging mask in /proc/$PID/status x86/mm: Provide arch_prctl() interface for LAM x86/mm: Reduce untagged_addr() overhead for systems without LAM x86/uaccess: Provide untagged_addr() and remove tags before address check mm: Introduce untagged_addr_remote() x86/mm: Handle LAM on context switch x86: CPUID and CR3/CR4 flags for Linear Address Masking x86: Allow atomic MM_CONTEXT flags setting x86/mm: Rework address range check in get_user() and put_user() |
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