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| author | Thomas Gleixner <tglx@linutronix.de> | 2021-06-23 14:02:22 +0200 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2021-06-23 19:55:16 +0200 |
| commit | 0e8c54f6b2c8b1037cef9276e451522ee90ed969 (patch) | |
| tree | 7c4460026cf1f124a922172f03ced464c785da57 /lib/dynamic_debug.c | |
| parent | 954436989cc550dd91aab98363240c9c0a4b7e23 (diff) | |
| download | linux-0e8c54f6b2c8b1037cef9276e451522ee90ed969.tar.gz linux-0e8c54f6b2c8b1037cef9276e451522ee90ed969.tar.bz2 linux-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 <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210623121456.802850233@linutronix.de
Diffstat (limited to 'lib/dynamic_debug.c')
0 files changed, 0 insertions, 0 deletions