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Shutemov" To: Dave Hansen , Andy Lutomirski , Peter Zijlstra Cc: x86@kernel.org, Kostya Serebryany , Andrey Ryabinin , Andrey Konovalov , Alexander Potapenko , Dmitry Vyukov , "H . J . Lu" , Andi Kleen , Rick Edgecombe , linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" Subject: [PATCHv3 0/8] Linear Address Masking enabling Date: Fri, 10 Jun 2022 17:35:19 +0300 Message-Id: <20220610143527.22974-1-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1654871773; a=rsa-sha256; cv=none; b=C68LuEQR8K97Hr2vFEKxFmM5FWtN7rYPTQ4n3sS5nADCMYDfFGm0bcvKMYNzOum2FZumDn C8/kyEDCGPPPWxD/wO0/GACrxtjpaWJ08OxVNhGPcTeu0QuMc48ZCQobPeL69m150l1i0X garnTui7Wj73rxGNim9JrpqDGJvWkgs= ARC-Authentication-Results: i=1; imf04.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=akrL+XuN; spf=none (imf04.hostedemail.com: domain of kirill.shutemov@linux.intel.com has no SPF policy when checking 192.55.52.88) smtp.mailfrom=kirill.shutemov@linux.intel.com; dmarc=pass (policy=none) header.from=intel.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1654871773; 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=gztoagnc7myKCld/nArBBirhw73siv0hjkA06WBvudA=; b=Q1gPyG8EX/O6onlbvaV21sdhpZcW/kpKmgkq5CpH+RIuXZXqJEpVKALpEzFnEGbI5V0+/D aj6jgbKBn0gzgMSoFRNCQWm/3q1yzrPr3mG99pWsjXXGbljCkBslk2Vm8KDNV8oIP7Dnfb MZCukVCmxb+/28BOudSj0kWs4BALqHE= X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: D672740074 X-Stat-Signature: fdzjkfannuurfk7hd3zzkbdsydym5x6m X-Rspam-User: Authentication-Results: imf04.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=akrL+XuN; spf=none (imf04.hostedemail.com: domain of kirill.shutemov@linux.intel.com has no SPF policy when checking 192.55.52.88) smtp.mailfrom=kirill.shutemov@linux.intel.com; dmarc=pass (policy=none) header.from=intel.com X-HE-Tag: 1654871772-861646 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. LAM_U48 enabling is controversial since it competes for bits with 5-level paging. Its enabling isolated into an optional last patch that can be applied at maintainer's discretion. Please review and consider applying. 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/$PID/arch_status [1] ISE, Chapter 14. https://software.intel.com/content/dam/develop/external/us/en/documents-tps/architecture-instruction-set-extensions-programming-reference.pdf Kirill A. Shutemov (8): x86/mm: Fix CR3_ADDR_MASK x86: CPUID and CR3/CR4 flags for Linear Address Masking mm: Pass down mm_struct to untagged_addr() x86/mm: Handle LAM on context switch x86/uaccess: Provide untagged_addr() and remove tags before address check x86/mm: Provide ARCH_GET_UNTAG_MASK and ARCH_ENABLE_TAGGED_ADDR x86: Expose untagging mask in /proc/$PID/arch_status x86/mm: Extend LAM to support to LAM_U48 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/elf.h | 3 +- arch/x86/include/asm/mmu.h | 2 + arch/x86/include/asm/mmu_context.h | 58 +++++++++++++++++ arch/x86/include/asm/processor-flags.h | 2 +- arch/x86/include/asm/tlbflush.h | 3 + arch/x86/include/asm/uaccess.h | 44 ++++++++++++- arch/x86/include/uapi/asm/prctl.h | 3 + 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 | 50 +++++++++++++++ arch/x86/kernel/process.c | 3 + arch/x86/kernel/process_64.c | 54 +++++++++++++++- arch/x86/kernel/sys_x86_64.c | 5 +- arch/x86/mm/hugetlbpage.c | 6 +- arch/x86/mm/mmap.c | 9 ++- arch/x86/mm/tlb.c | 62 ++++++++++++++----- .../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 | 11 ++++ 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 +- virt/kvm/kvm_main.c | 2 +- 51 files changed, 342 insertions(+), 126 deletions(-) create mode 100644 arch/x86/kernel/proc.c -- 2.35.1