Fenghua Yu b860eb8dce x86/fpu/xstate: Define new functions for clearing fpregs and xstates ... Currently, fpu__clear() clears all fpregs and xstates. Once XSAVES supervisor states are introduced, supervisor settings (e.g. CET xstates) must remain active for signals; It is necessary to have separate functions: - Create fpu__clear_user_states(): clear only user settings for signals; - Create fpu__clear_all(): clear both user and supervisor settings in flush_thread(). Also modify copy_init_fpstate_to_fpregs() to take a mask from above two functions. Remove obvious side-comment in fpu__clear(), while at it. [ bp: Make the second argument of fpu__clear() bool after requesting it a bunch of times during review. - Add a comment about copy_init_fpstate_to_fpregs() locking needs. ] Co-developed-by: Yu-cheng Yu <yu-cheng.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/20200512145444.15483-6-yu-cheng.yu@intel.com		2020-05-13 13:41:50 +02:00
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asm	x86/fpu/xstate: Define new functions for clearing fpregs and xstates	2020-05-13 13:41:50 +02:00
uapi/asm	KVM: nVMX: Emulate MTF when performing instruction emulation	2020-02-23 09:36:23 +01:00