Thomas Gleixner 9e798e9aa1 x86/fpu: Prepare fpu_clone() for dynamically enabled features ... The default portion of the parent's FPU state is saved in a child task. With dynamic features enabled, the non-default portion is not saved in a child's fpstate because these register states are defined to be caller-saved. The new task's fpstate is therefore the default buffer. Fork inherits the permission of the parent. Also, do not use memcpy() when TIF_NEED_FPU_LOAD is set because it is invalid when the parent has dynamic features. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lkml.kernel.org/r/20211021225527.10184-11-chang.seok.bae@intel.com		2021-10-26 10:18:09 +02:00
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asm	x86/fpu: Prepare fpu_clone() for dynamically enabled features	2021-10-26 10:18:09 +02:00
uapi/asm	x86/arch_prctl: Add controls for dynamic XSTATE components	2021-10-26 10:18:09 +02:00