linux-kernel - [PATCH v3 1/2] x86/arch_prctl: Add AMX feature numbers as ABI constants

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220711171347.27309-2-chang.seok.bae@intel.com>
Date:   Mon, 11 Jul 2022 10:13:46 -0700
From:   "Chang S. Bae" <chang.seok.bae@...el.com>
To:     dave.hansen@...el.com, len.brown@...el.com, tony.luck@...el.com,
        rafael.j.wysocki@...el.com, reinette.chatre@...el.com,
        dan.j.williams@...el.com
Cc:     bagasdotme@...il.com, corbet@....net, linux-doc@...r.kernel.org,
        linux-man@...r.kernel.org, linux-kernel@...r.kernel.org,
        chang.seok.bae@...el.com
Subject: [PATCH v3 1/2] x86/arch_prctl: Add AMX feature numbers as ABI constants

AMX state is dynamically enabled by the architecture-specific prctl().
Expose the XSTATE numbers as ABI constants. It will help applications as no
more spec look-up is needed for these numbers.

Signed-off-by: Chang S. Bae <chang.seok.bae@...el.com>
Cc: Tony Luck <tony.luck@...el.com>
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