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    Subject[PATCH v8 0/2] context tracker support for arm64
    Date
    Implement and enable context tracking for arm64 (which is
    a prerequisite for FULL_NOHZ support). This patchset
    builds upon earlier work by Kevin Hilman and is based on
    Will Deacon's tree.

    Changes v7 to v8:

    * Fix bug where el1_irq was calling ct_user_exit rather than el0_irq

    Changes v6 to v7:

    * Rename parameter of ct_user_exit from restore to syscall

    Changes v5 to v6:

    * Don't save far_el1 in x26 in el0_dbg path (not needed)
    * TIF_NOHZ processes go through the slow path (so no register
    save/restore is needed in ct_user_enter)

    Changes v4 to v5:

    * Improvement to code restoring far_el1 (suggested by Christopher Covington)
    * Improvement to register save/restore in ct_user_enter

    Changes v3 to v4:

    * Rename parameter of ct_user_exit from save to restore
    * Rebased patch to Will Deacon's tree (branch remotes/origin/aarch64
    of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git)

    Changes v2 to v3:

    * Save/restore necessary registers in ct_user_enter and ct_user_exit
    * Annotate "error paths" out of el0_sync with ct_user_exit

    Changes v1 to v2:

    * Save far_el1 in x26 temporarily

    Larry Bassel (2):
    arm64: adjust el0_sync so that a function can be called
    arm64: enable context tracking

    arch/arm64/Kconfig | 1 +
    arch/arm64/include/asm/thread_info.h | 4 +++
    arch/arm64/kernel/entry.S | 58 +++++++++++++++++++++++++++++++-----
    3 files changed, 56 insertions(+), 7 deletions(-)

    --
    1.8.3.2



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