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    Subject[PATCH RFC 0/8] powerpc barrier_nospec
    Date
    Hello,

    this is patchset adding barrier_nospec on powerpc. It is based on the
    out-of-tree gmb() patch and the existing rfi patches.

    I do not have the tests for the Spectre/Meltdown issues available so this is
    untested.

    Feedback on the general approach as well as actual effectivity is welcome.

    Thanks

    Michal


    Michal Suchanek (8):
    powerpc: Add barrier_nospec
    powerpc: Use barrier_nospec in copy_from_user
    powerpc/64: Use barrier_nospec in syscall entry
    powerpc/64s: Add support for ori barrier_nospec
    powerpc/64: Patch barrier_nospec in modules
    powerpc/64: barrier_nospec: Add debugfs trigger
    powerpc/64s: barrier_nospec: Add hcall triggerr
    powerpc/64: barrier_nospec: Add commandline trigger

    arch/powerpc/include/asm/barrier.h | 9 ++++
    arch/powerpc/include/asm/feature-fixups.h | 9 ++++
    arch/powerpc/include/asm/setup.h | 11 +++++
    arch/powerpc/include/asm/uaccess.h | 11 ++++-
    arch/powerpc/kernel/entry_64.S | 3 ++
    arch/powerpc/kernel/module.c | 6 +++
    arch/powerpc/kernel/setup_64.c | 72 +++++++++++++++++++++++++++++++
    arch/powerpc/kernel/vmlinux.lds.S | 7 +++
    arch/powerpc/lib/feature-fixups.c | 38 ++++++++++++++++
    arch/powerpc/platforms/pseries/setup.c | 38 ++++++++++------
    10 files changed, 190 insertions(+), 14 deletions(-)

    --
    2.13.6

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