diff options
| author |   Ingo Molnar <mingo@kernel.org> | 2015-04-30 09:09:26 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-05-19 15:48:03 +0200 |
| commit | 5e907bb0459399b0d1cc8d4c7e9f363a995b748a (patch) | |
| tree | 7a0ba64607b1e538740ef6f5d6b95a91c80418fc /arch/x86/include/asm/fpu/xstate.h | |
| parent | x86/fpu: Better document fpu__clear() state handling (diff) | |
| download | linux-dev-5e907bb0459399b0d1cc8d4c7e9f363a995b748a.tar.xz linux-dev-5e907bb0459399b0d1cc8d4c7e9f363a995b748a.zip | |
x86/alternatives, x86/fpu: Add 'alternatives_patched' debug flag and use it in xsave_state()
We'd like to use xsave_state() earlier, but its SYSTEM_BOOTING check
is too imprecise.
The real condition that xsave_state() would like to check is whether
alternative XSAVE instructions were patched into the kernel image
already.
Add such a (read-mostly) debug flag and use it in xsave_state().
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include/asm/fpu/xstate.h')
| -rw-r--r-- | arch/x86/include/asm/fpu/xstate.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/asm/fpu/xstate.h b/arch/x86/include/asm/fpu/xstate.h index 31a002ad5aeb..ab2c507b58b6 100644 --- a/arch/x86/include/asm/fpu/xstate.h +++ b/arch/x86/include/asm/fpu/xstate.h @@ -119,7 +119,7 @@ static inline int xsave_state(struct xsave_struct *fx) u32 hmask = mask >> 32; int err = 0; - WARN_ON(system_state == SYSTEM_BOOTING); + WARN_ON(!alternatives_patched); /* * If xsaves is enabled, xsaves replaces xsaveopt because |