x86/fpu/xstate: Introduce XSAVES supervisor states

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Enable XSAVES supervisor states by setting MSR_IA32_XSS bits according
to CPUID enumeration results. Also revise comments at various places.

Co-developed-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Link: https://lkml.kernel.org/r/20200512145444.15483-5-yu-cheng.yu@intel.com

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Yu-cheng Yu 2020-05-12 07:54:38 -07:00 • committed by Borislav Petkov

parent 524bb73bc1

commit 71581eefd7

1 changed files with 19 additions and 9 deletions

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arch/x86/kernel/fpu/xstate.c

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