linux-kernel - [PATCH v5 2/4] x86/arch_prctl: Add AMX feature numbers as ABI constants

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Message-Id: <20220922195810.23248-3-chang.seok.bae@intel.com>
Date:   Thu, 22 Sep 2022 12:58:08 -0700
From:   "Chang S. Bae" <chang.seok.bae@...el.com>
To:     x86@...nel.org, tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
        dave.hansen@...ux.intel.com
Cc:     hpa@...or.com, corbet@....net, bagasdotme@...il.com,
        tony.luck@...el.com, yang.zhong@...el.com,
        linux-doc@...r.kernel.org, linux-man@...r.kernel.org,
        linux-kernel@...r.kernel.org, chang.seok.bae@...el.com
Subject: [PATCH v5 2/4] x86/arch_prctl: Add AMX feature numbers as ABI constants

AMX state is dynamically enabled by the architecture-specific prctl().
Expose the state components as ABI constants. They become handy not to be
looked up from the architecture specification.

Signed-off-by: Chang S. Bae <chang.seok.bae@...el.com>
Reviewed-by: Tony Luck <tony.luck@...el.com>
Cc: x86@...nel.org
Cc: linux-kernel@...r.kernel.org
---
Changes from v2:
* Add as a new patch (Tony Luck).
---
 arch/x86/include/uapi/asm/prctl.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/include/uapi/asm/prctl.h b/arch/x86/include/uapi/asm/prctl.h
index 500b96e71f18..f298c778f856 100644
--- a/arch/x86/include/uapi/asm/prctl.h
+++ b/arch/x86/include/uapi/asm/prctl.h
@@ -16,6 +16,9 @@
 #define ARCH_GET_XCOMP_GUEST_PERM	0x1024
 #define ARCH_REQ_XCOMP_GUEST_PERM	0x1025
 
+#define ARCH_XCOMP_TILECFG		17
+#define ARCH_XCOMP_TILEDATA		18
+
 #define ARCH_MAP_VDSO_X32		0x2001
 #define ARCH_MAP_VDSO_32		0x2002
 #define ARCH_MAP_VDSO_64		0x2003
-- 
2.17.1