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| author | Rudolf Marek <r.marek@assembler.cz> | 2017-11-28 22:01:06 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-12-06 12:27:13 +0100 |
| commit | e3811a3f74bd1ad773667b78323f396166891f3a (patch) | |
| tree | 42b6373d2a02fd18eb2594786d9f4dbe20c8c54a /arch/x86/kernel/cpu/microcode/amd.c | |
| parent | 55d2d0ad2fb4325f615d1950486fbc5e6fba1769 (diff) | |
x86/cpufeatures: Make X86_BUG_FXSAVE_LEAK detectable in CPUID on AMD
The latest AMD AMD64 Architecture Programmer's Manual
adds a CPUID feature XSaveErPtr (CPUID_Fn80000008_EBX[2]).
If this feature is set, the FXSAVE, XSAVE, FXSAVEOPT, XSAVEC, XSAVES
/ FXRSTOR, XRSTOR, XRSTORS always save/restore error pointers,
thus making the X86_BUG_FXSAVE_LEAK workaround obsolete on such CPUs.
Signed-off-by: Rudolf Marek <r.marek@assembler.cz>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Borislav Petkov <bp@suse.de>
Tested-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Link: https://lkml.kernel.org/r/bdcebe90-62c5-1f05-083c-eba7f08b2540@assembler.cz
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/cpu/microcode/amd.c')
0 files changed, 0 insertions, 0 deletions