x86/fpu/amx: Enable the AMX feature in 64-bit mode
Add the AMX state components in XFEATURE_MASK_USER_SUPPORTED and the TILE_DATA component to the dynamic states and update the permission check table accordingly. This is only effective on 64 bit kernels as for 32bit kernels XFEATURE_MASK_TILE is defined as 0. TILE_DATA is caller-saved state and the only dynamic state. Add build time sanity check to ensure the assumption that every dynamic feature is caller- saved. Make AMX state depend on XFD as it is dynamic feature. Signed-off-by:Chang S. Bae <chang.seok.bae@intel.com> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
Borislav Petkov <bp@suse.de> Link: https://lore.kernel.org/r/20211021225527.10184-24-chang.seok.bae@intel.com
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- arch/x86/include/asm/fpu/xstate.h 3 additions, 2 deletionsarch/x86/include/asm/fpu/xstate.h
- arch/x86/kernel/cpu/cpuid-deps.c 1 addition, 0 deletionsarch/x86/kernel/cpu/cpuid-deps.c
- arch/x86/kernel/fpu/core.c 6 additions, 0 deletionsarch/x86/kernel/fpu/core.c
- arch/x86/kernel/fpu/xstate.c 3 additions, 2 deletionsarch/x86/kernel/fpu/xstate.c
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