Updates from v6 [6]: * Fix ptracer-induced FS/GSBASE write behavior (Andy) * Fix GSBASE handling in the NMI path * Remove local_irq_save/restore() from switch_to() * Separate things into new patches (from 12th to 9th and 10th) * Add GSBASE handling in the documentation * Add more comments for entry changes * Edit changelog (multiple patches) (all points by Thomas if not mentioned)
Previous versions: [1-5] [1] Version 1: https://lore.kernel.org/patchwork/cover/934843 [2] Version 2: https://lore.kernel.org/patchwork/cover/912063 [3] Version 3: https://lore.kernel.org/patchwork/cover/1002725 [4] Version 4: https://lore.kernel.org/patchwork/cover/1032799 [5] Version 5: https://lore.kernel.org/patchwork/cover/1038035 [6] Version 6: https://lore.kernel.org/patchwork/cover/1051240 Andi Kleen (3): x86/fsgsbase/64: Add intrinsics for FSGSBASE instructions x86/elf: Enumerate kernel FSGSBASE capability in AT_HWCAP2 x86/fsgsbase/64: Add documentation for FSGSBASE Andy Lutomirski (4): x86/fsgsbase/64: Add 'unsafe_fsgsbase' to enable CR4.FSGSBASE x86/fsgsbase/64: Preserve FS/GS state in __switch_to() if FSGSBASE is on selftests/x86/fsgsbase: Test WRGSBASE x86/fsgsbase/64: Enable FSGSBASE by default and add a chicken bit Chang S. Bae (11): x86/fsgsbase/64: Fix ARCH_SET_FS/GS behaviors for a remote task selftests/x86/fsgsbase: Test ptracer-induced GSBASE write kbuild: Raise the minimum required binutils version to 2.21 x86/fsgsbase/64: Enable FSGSBASE instructions in the helper functions x86/fsgsbase/64: When copying a thread, use the FSGSBASE instructions x86/entry/64: Add the READ_MSR_GSBASE macro x86/entry/64: Switch CR3 before SWAPGS on the paranoid entry x86/fsgsbase/64: Introduce the FIND_PERCPU_BASE macro x86/fsgsbase/64: GSBASE handling with FSGSBASE in the paranoid path x86/fsgsbase/64: Document GSBASE handling in the paranoid path selftests/x86/fsgsbase: Test ptracer-induced GSBASE write with FSGSBASE Documentation/admin-guide/kernel-parameters.txt | 2 + Documentation/process/changes.rst | 6 +- Documentation/x86/entry_64.txt | 17 +++ Documentation/x86/fsgs.txt | 103 ++++++++++++++ arch/x86/entry/calling.h | 49 +++++++ arch/x86/entry/entry_64.S | 142 ++++++++++++++++--- arch/x86/include/asm/fsgsbase.h | 45 ++++-- arch/x86/include/asm/inst.h | 15 ++ arch/x86/include/uapi/asm/hwcap2.h | 3 + arch/x86/kernel/cpu/common.c | 22 +++ arch/x86/kernel/process_64.c | 132 +++++++++++++---- arch/x86/kernel/ptrace.c | 14 +- tools/testing/selftests/x86/fsgsbase.c | 179 +++++++++++++++++++++++- 13 files changed, 660 insertions(+), 69 deletions(-) create mode 100644 Documentation/x86/fsgs.txt -- 2.7.4
