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Shutemov" To: Dave Hansen , Andy Lutomirski , Peter Zijlstra Cc: x86@kernel.org, Kostya Serebryany , Andrey Ryabinin , Andrey Konovalov , Alexander Potapenko , Taras Madan , Dmitry Vyukov , "H . J . Lu" , Andi Kleen , Rick Edgecombe , linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" Subject: [PATCHv6 00/11] Linear Address Masking enabling Date: Mon, 15 Aug 2022 07:17:52 +0300 Message-Id: <20220815041803.17954-1-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1660536907; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:references:dkim-signature; bh=WO/W967TPKjuocTn5F0+GOQ0K1wdQb/7jj7TgYJaNmY=; b=KskJ4PJPhHCJmEUMLkBnAzKb2dpKCb5k8AhI1OWg+Zamw55/PaIIjccGFYwya5dOj9qpoP 4frnspcTeXCuvY5pcpYciixdkxZnEwb/yQhKaex0cva2uG7Eaekiks2tEXTAH7CpU6GofO oRrWZv5zfMR1E6YzsgqFCBUmiKu7vtE= ARC-Authentication-Results: i=1; imf21.hostedemail.com; dkim=none ("invalid DKIM record") header.d=intel.com header.s=Intel header.b=BsPCnQtm; spf=none (imf21.hostedemail.com: domain of kirill.shutemov@linux.intel.com has no SPF policy when checking 192.55.52.151) smtp.mailfrom=kirill.shutemov@linux.intel.com; dmarc=fail reason="No valid SPF" header.from=intel.com (policy=none) ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1660536907; a=rsa-sha256; cv=none; b=oPvPlnGd7o2JmVNdidK36bJ3Xs2Z1g05vFVUC901gVwQZ29uyLhxVBXAwjIE7+ZTXdiJFL OPXTKZY+W/Tuw/5DbQhCFGhduOGBOIKnekyT2ewgzldA66cWs8Zp/6dO4Et3hTUTc4WRkH dvqAUmsY4PM9VotNRyjkOCzxtyk2i98= X-Stat-Signature: my3x78bct1xetkstitdwoozb3u5u9inw X-Rspamd-Queue-Id: EDE2E1C01D0 Authentication-Results: imf21.hostedemail.com; dkim=none ("invalid DKIM record") header.d=intel.com header.s=Intel header.b=BsPCnQtm; spf=none (imf21.hostedemail.com: domain of kirill.shutemov@linux.intel.com has no SPF policy when checking 192.55.52.151) smtp.mailfrom=kirill.shutemov@linux.intel.com; dmarc=fail reason="No valid SPF" header.from=intel.com (policy=none) X-Rspam-User: X-Rspamd-Server: rspam09 X-HE-Tag: 1660536906-479056 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Linear Address Masking[1] (LAM) modifies the checking that is applied to 64-bit linear addresses, allowing software to use of the untranslated address bits for metadata. The patchset brings support for LAM for userspace addresses. Only LAM_U57 at this time. Please review and consider applying. git://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git lam v6: - Rebased onto v6.0-rc1 - LAM_U48 excluded from the patchet. Still available in the git tree; - Add ARCH_GET_MAX_TAG_BITS (and tests for it); - Fix build without CONFIG_DEBUG_VM; - Update comments; - Reviewed/Tested-by from Alexander; v5: - Do not use switch_mm() in enable_lam_func() - Use mb()/READ_ONCE() pair on LAM enabling; - Add self-test by Weihong Zhang; - Add comments; v4: - Fix untagged_addr() for LAM_U48; - Remove no-threads restriction on LAM enabling; - Fix mm_struct access from /proc/$PID/arch_status - Fix LAM handling in initialize_tlbstate_and_flush() - Pack tlb_state better; - Comments and commit messages; v3: - Rebased onto v5.19-rc1 - Per-process enabling; - API overhaul (again); - Avoid branches and costly computations in the fast path; - LAM_U48 is in optional patch. v2: - Rebased onto v5.18-rc1 - New arch_prctl(2)-based API - Expose status of LAM (or other thread features) in /proc/$PID/arch_status [1] ISE, Chapter 10. https://cdrdv2.intel.com/v1/dl/getContent/671368 Kirill A. Shutemov (7): x86/mm: Fix CR3_ADDR_MASK x86: CPUID and CR3/CR4 flags for Linear Address Masking mm: Pass down mm_struct to untagged_addr() x86/mm: Handle LAM on context switch x86/uaccess: Provide untagged_addr() and remove tags before address check x86/mm: Provide arch_prctl() interface for LAM x86: Expose untagging mask in /proc/$PID/arch_status Weihong Zhang (4): selftests/x86/lam: Add malloc and tag-bits test cases for linear-address masking selftests/x86/lam: Add mmap and SYSCALL test cases for linear-address masking selftests/x86/lam: Add io_uring test cases for linear-address masking selftests/x86/lam: Add inherit test cases for linear-address masking arch/arm64/include/asm/memory.h | 4 +- arch/arm64/include/asm/signal.h | 2 +- arch/arm64/include/asm/uaccess.h | 4 +- arch/arm64/kernel/hw_breakpoint.c | 2 +- arch/arm64/kernel/traps.c | 4 +- arch/arm64/mm/fault.c | 10 +- arch/sparc/include/asm/pgtable_64.h | 2 +- arch/sparc/include/asm/uaccess_64.h | 2 + arch/x86/include/asm/cpufeatures.h | 1 + arch/x86/include/asm/mmu.h | 6 + arch/x86/include/asm/mmu_context.h | 45 + arch/x86/include/asm/processor-flags.h | 4 +- arch/x86/include/asm/tlbflush.h | 35 + arch/x86/include/asm/uaccess.h | 42 +- arch/x86/include/uapi/asm/prctl.h | 4 + arch/x86/include/uapi/asm/processor-flags.h | 6 + arch/x86/kernel/Makefile | 2 + arch/x86/kernel/fpu/xstate.c | 47 - arch/x86/kernel/proc.c | 60 ++ arch/x86/kernel/process.c | 3 + arch/x86/kernel/process_64.c | 65 +- arch/x86/mm/tlb.c | 43 +- .../gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 2 +- drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 2 +- drivers/gpu/drm/radeon/radeon_gem.c | 2 +- drivers/infiniband/hw/mlx4/mr.c | 2 +- drivers/media/common/videobuf2/frame_vector.c | 2 +- drivers/media/v4l2-core/videobuf-dma-contig.c | 2 +- .../staging/media/atomisp/pci/hmm/hmm_bo.c | 2 +- drivers/tee/tee_shm.c | 2 +- drivers/vfio/vfio_iommu_type1.c | 2 +- fs/proc/task_mmu.c | 2 +- include/linux/mm.h | 11 - include/linux/uaccess.h | 15 + lib/strncpy_from_user.c | 2 +- lib/strnlen_user.c | 2 +- mm/gup.c | 6 +- mm/madvise.c | 2 +- mm/mempolicy.c | 6 +- mm/migrate.c | 2 +- mm/mincore.c | 2 +- mm/mlock.c | 4 +- mm/mmap.c | 2 +- mm/mprotect.c | 2 +- mm/mremap.c | 2 +- mm/msync.c | 2 +- tools/testing/selftests/x86/Makefile | 2 +- tools/testing/selftests/x86/lam.c | 900 ++++++++++++++++++ virt/kvm/kvm_main.c | 2 +- 49 files changed, 1256 insertions(+), 121 deletions(-) create mode 100644 arch/x86/kernel/proc.c create mode 100644 tools/testing/selftests/x86/lam.c -- 2.35.1