Messages in this thread Patch in this message | | | From | "Chang S. Bae" <> | Subject | [PATCH v9 21/26] x86/fpu/amx: Enable the AMX feature in 64-bit mode | Date | Fri, 30 Jul 2021 07:59:52 -0700 |
| |
In 64-bit mode, include the AMX state components in XFEATURE_MASK_USER_SUPPORTED.
Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com> Reviewed-by: Len Brown <len.brown@intel.com> Cc: x86@kernel.org Cc: linux-kernel@vger.kernel.org --- Changes from v5: * Adjusted macro changes and moved the disabling code for non-64-bit mode for the new base changes.
Changes from v4: * Removed the irrelevant line from the changelog. (Thomas Gleixner) --- arch/x86/include/asm/fpu/xstate.h | 3 ++- arch/x86/kernel/fpu/xstate.c | 6 +++++- 2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/arch/x86/include/asm/fpu/xstate.h b/arch/x86/include/asm/fpu/xstate.h index 912b420cb148..f934ce88c048 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. diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c index dac01e4d7654..96056f49bcff 100644 --- a/arch/x86/kernel/fpu/xstate.c +++ b/arch/x86/kernel/fpu/xstate.c @@ -538,7 +538,8 @@ static void __init print_xstate_offset_size(void) XFEATURE_MASK_PKRU | \ XFEATURE_MASK_BNDREGS | \ XFEATURE_MASK_BNDCSR | \ - XFEATURE_MASK_PASID) + XFEATURE_MASK_PASID | \ + XFEATURE_MASK_XTILE) /* * setup the xstate image representing the init state @@ -1054,6 +1055,9 @@ void __init fpu__init_system_xstate(void) xfeatures_mask_all &= XFEATURE_MASK_USER_SUPPORTED | XFEATURE_MASK_SUPERVISOR_SUPPORTED; + if (!IS_ENABLED(CONFIG_X86_64)) + xfeatures_mask_all &= ~XFEATURE_MASK_XTILE; + /* Store it for paranoia check at the end */ xfeatures = xfeatures_mask_all; /* Do not support the dynamically allocated buffer yet. */ -- 2.17.1
| |