From: "Chang S. Bae" <chang.seok.bae@intel.com>
To: x86@kernel.org, tglx@linutronix.de, mingo@redhat.com,
bp@alien8.de, dave.hansen@linux.intel.com
Cc: hpa@zytor.com, corbet@lwn.net, bagasdotme@gmail.com,
tony.luck@intel.com, yang.zhong@intel.com,
linux-doc@vger.kernel.org, linux-man@vger.kernel.org,
linux-kernel@vger.kernel.org, chang.seok.bae@intel.com
Subject: [PATCH v4 2/4] x86/arch_prctl: Add AMX feature numbers as ABI constants
Date: Fri, 9 Sep 2022 13:15:38 -0700 [thread overview]
Message-ID: <20220909201540.17705-3-chang.seok.bae@intel.com> (raw)
In-Reply-To: <20220909201540.17705-1-chang.seok.bae@intel.com>
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@intel.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Cc: x86@kernel.org
Cc: linux-kernel@vger.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
next prev parent reply other threads:[~2022-09-09 20:26 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-09 20:15 [PATCH v4 0/4] Documentation/x86: Improve the AMX documentation Chang S. Bae
2022-09-09 20:15 ` [PATCH v4 1/4] Documentation/x86: Explain the purpose for dynamic features Chang S. Bae
2022-09-09 21:36 ` Dave Hansen
2022-09-14 5:25 ` Chang S. Bae
2022-09-09 20:15 ` Chang S. Bae [this message]
2022-09-09 20:15 ` [PATCH v4 3/4] Documentation/x86: Add the AMX enabling example Chang S. Bae
2022-09-09 20:15 ` [PATCH v4 4/4] Documentation/x86: Explain the state component permission for guests Chang S. Bae
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