[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PATCH] x86/cpuid: enumerate and expose PREFETCHIT{0,1}
- To: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 10 Aug 2023 17:22:38 +0200
- Arc-authentication-results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=suse.com; dmarc=pass action=none header.from=suse.com; dkim=pass header.d=suse.com; arc=none
- Arc-message-signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=9yXHXhGgAaZBvGO/HRjNHzgKfun6sR+8AGqHAx4aN+w=; b=gH7WVrFcXRVPCIS0jTLd1EW4jCWsfxghw/TBT/q8DEvUgSVbyHHS9WKiwR+/1IATyHeyd2jLHXUBFeEAfjK7o84uv4G4+gwacRzx8aii1fMzNxeMk8fvrrTDW8oqLVbUMdRLXK05VjaZ5hmVqIOgcZjNKXr0nra2Apxwj5HlTq+GUSKFN1e5ZKz8bVY8XRmpKTPhrjIpnp9HVovLLi6X0/WcFrBEEsP0wA2Mqd+g6decVKUApneP5lYR2w24t8HrQLuNNNPDZwitgAZlspYLr5KivVG36jnFA7Zx9GWEkTR7xDZVO4mln7qtZgQ+jb6XYAjvJzLZIRiRtWM3zeWMPw==
- Arc-seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=kyeEuT31jGRyVdkO3PyM2bOhSJPGZM2+UHF3Xao9ph176PQHZ+9Bmf5ETCae5dKQz+/6QDoALS+Lsb5yz06gnIP7aS8U3DfV3ADHlXUonD8nLYXAUcNNGqtQDGPAMaEmKcTjMHm6r2HpylEAYg3OReBkIdQAo9/x4OCVaWmFwAHjOA1SAKD5XN/NYXguTYdFBeY71oPmppmtYWHBcfw2ylp+UamDpdTnWOKXj+3Wr9IEG8eqTrmQjHhSU8wWsrd18ZE0lrI8xO7w1BIVKUmjQP7J6b8eRKzqHYWi25lXULg3j4pgt7UPutiMhlG0FU5PiHPvh8yYpe6rdVNWnnvhVw==
- Authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=suse.com;
- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Delivery-date: Thu, 10 Aug 2023 15:22:52 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
There's nothing else that should need doing in order for guests to be
able to use these insns.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
--- a/tools/misc/xen-cpuid.c
+++ b/tools/misc/xen-cpuid.c
@@ -220,6 +220,8 @@ static const char *const str_7d1[32] =
{
[ 4] = "avx-vnni-int8", [ 5] = "avx-ne-convert",
+ [14] = "prefetchi",
+
[18] = "cet-sss",
};
--- a/xen/include/public/arch-x86/cpufeatureset.h
+++ b/xen/include/public/arch-x86/cpufeatureset.h
@@ -309,6 +309,7 @@ XEN_CPUFEATURE(AVX_VNNI_INT8, 15*32
/* Intel-defined CPU features, CPUID level 0x00000007:1.edx, word 15 */
XEN_CPUFEATURE(AVX_VNNI_INT8, 15*32+ 4) /*A AVX-VNNI-INT8 Instructions */
XEN_CPUFEATURE(AVX_NE_CONVERT, 15*32+ 5) /*A AVX-NE-CONVERT Instructions
*/
+XEN_CPUFEATURE(PREFETCHI, 15*32+14) /*A PREFETCHIT{0,1} Instructions
*/
XEN_CPUFEATURE(CET_SSS, 15*32+18) /* CET Supervisor Shadow Stacks
safe to use */
/* Intel-defined CPU features, MSR_ARCH_CAPS 0x10a.eax, word 16 */
|
