diff options
| author | Chang S. Bae <chang.seok.bae@intel.com> | 2021-10-21 15:55:27 -0700 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2021-10-26 10:53:03 +0200 |
| commit | 2308ee57d93d896618dd65c996429c9d3e469fe0 (patch) | |
| tree | baa443ee20a3f77e78fced1523307383b21b78b6 /arch/x86/include | |
| parent | db3e7321b4b84b1cb39598ff79b90d1252481378 (diff) | |
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
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/fpu/xstate.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/include/asm/fpu/xstate.h b/arch/x86/include/asm/fpu/xstate.h index 10adf1376f0c..0f8b90ab18c9 100644 --- a/arch/x86/include/asm/fpu/xstate.h +++ b/arch/x86/include/asm/fpu/xstate.h @@ -35,7 +35,8 @@ XFEATURE_MASK_Hi16_ZMM | \ XFEATURE_MASK_PKRU | \ XFEATURE_MASK_BNDREGS | \ - XFEATURE_MASK_BNDCSR) + XFEATURE_MASK_BNDCSR | \ + XFEATURE_MASK_XTILE) /* * Features which are restored when returning to user space. @@ -46,7 +47,7 @@ (XFEATURE_MASK_USER_SUPPORTED & ~XFEATURE_MASK_PKRU) /* Features which are dynamically enabled for a process on request */ -#define XFEATURE_MASK_USER_DYNAMIC 0ULL +#define XFEATURE_MASK_USER_DYNAMIC XFEATURE_MASK_XTILE_DATA /* All currently supported supervisor features */ #define XFEATURE_MASK_SUPERVISOR_SUPPORTED (XFEATURE_MASK_PASID) |