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x86/fpu/apx: Enable APX state support

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With securing APX against conflicting MPX, it is now ready to be enabled.
Include APX in the enabled xfeature set.

Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Sohil Mehta <sohil.mehta@intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Link: https://lore.kernel.org/r/20250416021720.12305-5-chang.seok.bae@intel.com
This commit is contained in:
Chang S. Bae 2025-04-15 19:16:54 -07:00 committed by Ingo Molnar
parent ea68e39190
commit 50c5b071e2
2 changed files with 4 additions and 2 deletions
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3
arch/x86/include/asm/fpu/xstate.h
View File

@ -32,7 +32,8 @@
XFEATURE_MASK_PKRU | \
XFEATURE_MASK_BNDREGS | \
XFEATURE_MASK_BNDCSR | \
XFEATURE_MASK_XTILE)
XFEATURE_MASK_XTILE | \
XFEATURE_MASK_APX)
/*
* Features which are restored when returning to user space.

3
arch/x86/kernel/fpu/xstate.c
View File

@ -371,7 +371,8 @@ static __init void os_xrstor_booting(struct xregs_state *xstate)
XFEATURE_MASK_BNDCSR | \
XFEATURE_MASK_PASID | \
XFEATURE_MASK_CET_USER | \
XFEATURE_MASK_XTILE)
XFEATURE_MASK_XTILE | \
XFEATURE_MASK_APX)
/*
* setup the xstate image representing the init state