From: Jim Mattson <jmattson@google.com>
To: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Tony Luck <tony.luck@intel.com>,
Peter Zijlstra <peterz@infradead.org>,
"Chang S. Bae" <chang.seok.bae@intel.com>,
Jim Mattson <jmattson@google.com>,
Juergen Gross <jgross@suse.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Babu Moger <babu.moger@amd.com>, Jing Liu <jing2.liu@intel.com>,
Sean Christopherson <seanjc@google.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH 2/2] x86/cpufeatures: Add macros for Intel's new fast rep string features
Date: Thu, 3 Feb 2022 11:43:08 -0800 [thread overview]
Message-ID: <20220203194308.2469117-2-jmattson@google.com> (raw)
In-Reply-To: <20220203194308.2469117-1-jmattson@google.com>
Even if no one else cares, these features should be exposed to kvm
guests, and the code for the KVM_GET_SUPPORTED_CPUID ioctl is more
readable if the bits have corresponding X86_FEATURE macros.
Signed-off-by: Jim Mattson <jmattson@google.com>
---
arch/x86/include/asm/cpufeatures.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h
index d7b51ddc8db3..138a50bc7bbd 100644
--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -299,6 +299,9 @@
/* Intel-defined CPU features, CPUID level 0x00000007:1 (EAX), word 12 */
#define X86_FEATURE_AVX_VNNI (12*32+ 4) /* AVX VNNI instructions */
#define X86_FEATURE_AVX512_BF16 (12*32+ 5) /* AVX512 BFLOAT16 instructions */
+#define X86_FEATURE_FZRM (12*32+10) /* Fast zero-length REP MOVSB */
+#define X86_FEATURE_FSRS (12*32+11) /* Fast short REP STOSB */
+#define X86_FEATURE_FSRC (12*32+12) /* Fast short REP {CMPSB,SCASB} */
/* AMD-defined CPU features, CPUID level 0x80000008 (EBX), word 13 */
#define X86_FEATURE_CLZERO (13*32+ 0) /* CLZERO instruction */
--
2.35.0.263.gb82422642f-goog
next prev parent reply other threads:[~2022-02-03 19:44 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-03 19:43 [PATCH 1/2] x86/cpufeatures: Put the AMX macros in the word 18 block Jim Mattson
2022-02-03 19:43 ` Jim Mattson [this message]
2022-02-03 20:25 ` [PATCH 2/2] x86/cpufeatures: Add macros for Intel's new fast rep string features Dave Hansen
2022-02-03 20:50 ` Jim Mattson
2022-02-03 20:27 ` [tip: x86/cpu] x86/cpufeatures: Put the AMX macros in the word 18 block tip-bot2 for Jim Mattson
2022-02-08 9:54 ` tip-bot2 for Jim Mattson
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