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| author | Thomas Gleixner <[email protected]> | 2021-06-23 12:02:22 +0000 |
|---|---|---|
| committer | Borislav Petkov <[email protected]> | 2021-06-23 17:55:16 +0000 |
| commit | 0e8c54f6b2c8b1037cef9276e451522ee90ed969 (patch) | |
| tree | 7c4460026cf1f124a922172f03ced464c785da57 /lib/test_bitops.c | |
| parent | x86/fpu: Remove PKRU handling from switch_fpu_finish() (diff) | |
| download | kernel-0e8c54f6b2c8b1037cef9276e451522ee90ed969.tar.gz kernel-0e8c54f6b2c8b1037cef9276e451522ee90ed969.zip | |
x86/fpu: Don't store PKRU in xstate in fpu_reset_fpstate()
PKRU for a task is stored in task->thread.pkru when the task is scheduled
out. For 'current' the authoritative source of PKRU is the hardware.
fpu_reset_fpstate() has two callers:
1) fpu__clear_user_states() for !FPU systems. For those PKRU is irrelevant
2) fpu_flush_thread() which is invoked from flush_thread(). flush_thread()
resets the hardware to the kernel restrictive default value.
Signed-off-by: Thomas Gleixner <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Reviewed-by: Borislav Petkov <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Diffstat (limited to 'lib/test_bitops.c')
0 files changed, 0 insertions, 0 deletions