Messages in this thread | | | From | "Chang S. Bae" <> | Subject | [RESEND PATCH V5 0/8] x86: infrastructure to enable FSGSBASE | Date | Thu, 23 Aug 2018 09:44:30 -0700 |
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Resending the patchset that was posted before [6].
Given feedbacks from [1], it was suggested to separate two parts and to (re-)submit this patchset first.
To facilitate FSGSBASE, Andy's FS/GS base read fix is first ordered, then some helper functions and refactoring work are included. Cleanup for the vDSO initialization is for preparing per-CPU base finder that will be used in the paranoid entry, when FSGSBASE enabled.
Changes from V4 [5]: * Change patch ordering; putting the fix first before introducing the helper functions * Cleanup further for vDSO CPU initialization codes
Changes from V3 [4]: * Unify CPU number initialization
Changes from V2 [3]: * Bisect the CPU number initialization patch * Drop patches for introducing i386 CPU_NUMBER and switching write_rdtscp_aux() to use wrmsr_safe()
Changes from V1 [2]: * Rename the x86-64 CPU_NUMBER segment from PER_CPU * Add i386 CPU_NUMBER equivalent to x86-64 at GDT entry 23 * Add additional helper function to store CPU number * Switch write_rdtscp_aux() to use wrmsr_safe()
[1] FSGSBASE patch set V2: https://lore.kernel.org/patchwork/cover/912063/ [2] infrastructure for FSGSBASE V1: https://lore.kernel.org/patchwork/cover/913139/ [3] V2: https://lore.kernel.org/patchwork/cover/913644/ [4] V3: https://lore.kernel.org/patchwork/cover/949775/ [5] V4: https://lore.kernel.org/patchwork/cover/951712/ [6] V5: https://lore.kernel.org/patchwork/cover/956526/
Andy Lutomirski (1): x86/arch_prctl/64: Make ptrace read FS/GS base accurately
Chang S. Bae (7): x86/fsgsbase/64: Introduce FS/GS base helper functions x86/fsgsbase/64: Make ptrace use FS/GS base helpers x86/fsgsbase/64: Use FS/GS base helpers in core dump x86/fsgsbase/64: Factor out load FS/GS segments from __switch_to x86/segments/64: Rename PER_CPU segment to CPU_NUMBER x86/vdso: Introduce helper functions for CPU and node number x86/vdso: Move out the CPU initialization
arch/x86/entry/vdso/vgetcpu.c | 9 +- arch/x86/entry/vdso/vma.c | 38 +-------- arch/x86/include/asm/elf.h | 6 +- arch/x86/include/asm/fsgsbase.h | 47 +++++++++++ arch/x86/include/asm/segment.h | 46 +++++++++- arch/x86/include/asm/vgtod.h | 26 ------ arch/x86/kernel/cpu/common.c | 24 ++++++ arch/x86/kernel/process_64.c | 183 +++++++++++++++++++++++++++++++--------- arch/x86/kernel/ptrace.c | 28 ++---- 9 files changed, 270 insertions(+), 137 deletions(-) create mode 100644 arch/x86/include/asm/fsgsbase.h
-- 2.7.4
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