From: David Woodhouse <dwmw@amazon.co.uk>
To: arjan@linux.intel.com, tglx@linutronix.de, karahmed@amazon.de,
x86@kernel.org, linux-kernel@vger.kernel.org,
tim.c.chen@linux.intel.com, bp@alien8.de, peterz@infradead.org,
pbonzini@redhat.com, ak@linux.intel.com,
torvalds@linux-foundation.org, gregkh@linux-foundation.org,
dave.hansen@intel.com, gnomes@lxorguk.ukuu.org.uk,
ashok.raj@intel.com, mingo@kernel.org
Subject: [PATCH v4 2/7] x86/cpufeatures: Add Intel feature bits for Speculation Control
Date: Thu, 25 Jan 2018 09:23:04 +0000 [thread overview]
Message-ID: <1516872189-16577-3-git-send-email-dwmw@amazon.co.uk> (raw)
In-Reply-To: <1516872189-16577-1-git-send-email-dwmw@amazon.co.uk>
Add three feature bits exposed by new microcode on Intel CPUs for
speculation control.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Borislav Petkov <bp@suse.de>
---
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 7b25cf3..0a51070 100644
--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -320,6 +320,9 @@
/* Intel-defined CPU features, CPUID level 0x00000007:0 (EDX), word 18 */
#define X86_FEATURE_AVX512_4VNNIW (18*32+ 2) /* AVX-512 Neural Network Instructions */
#define X86_FEATURE_AVX512_4FMAPS (18*32+ 3) /* AVX-512 Multiply Accumulation Single precision */
+#define X86_FEATURE_SPEC_CTRL (18*32+26) /* Speculation Control (IBRS + IBPB) */
+#define X86_FEATURE_STIBP (18*32+27) /* Single Thread Indirect Branch Predictors */
+#define X86_FEATURE_ARCH_CAPABILITIES (18*32+29) /* IA32_ARCH_CAPABILITIES MSR (Intel) */
/*
* BUG word(s)
--
2.7.4
next prev parent reply other threads:[~2018-01-25 9:23 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-25 9:23 [PATCH v4 0/7] Basic Speculation Control feature support David Woodhouse
2018-01-25 9:23 ` [PATCH v4 1/7] x86/cpufeatures: Add CPUID_7_EDX CPUID leaf David Woodhouse
2018-01-25 9:23 ` David Woodhouse [this message]
2018-01-25 9:23 ` [PATCH v4 3/7] x86/cpufeatures: Add AMD feature bits for Speculation Control David Woodhouse
2018-01-25 9:23 ` [PATCH v4 4/7] x86/msr: Add definitions for new speculation control MSRs David Woodhouse
2018-01-25 9:23 ` [PATCH v4 5/7] x86/pti: Do not enable PTI on processors which are not vulnerable to Meltdown David Woodhouse
2018-01-25 9:42 ` Peter Zijlstra
2018-01-25 9:56 ` David Woodhouse
2018-01-25 10:01 ` Thomas Gleixner
2018-01-25 15:12 ` Alan Cox
2018-01-25 9:23 ` [PATCH v4 6/7] x86/cpufeature: Blacklist SPEC_CTRL on early Spectre v2 microcodes David Woodhouse
2018-01-25 10:43 ` David Woodhouse
2018-01-25 10:54 ` Thomas Gleixner
2018-01-25 11:20 ` David Woodhouse
2018-01-25 11:34 ` Thomas Gleixner
2018-01-25 13:41 ` David Woodhouse
2018-01-25 14:58 ` Thomas Gleixner
2018-01-25 16:16 ` Alan Cox
2018-01-25 16:24 ` Thomas Gleixner
2018-01-25 16:35 ` David Woodhouse
2018-01-26 9:40 ` Ingo Molnar
2018-01-25 9:23 ` [PATCH v4 7/7] x86/speculation: Add basic IBPB (Indirect Branch Prediction Barrier) support David Woodhouse
2018-01-25 11:41 ` Borislav Petkov
2018-01-25 11:47 ` David Woodhouse
2018-01-25 11:50 ` Borislav Petkov
2018-01-25 11:58 ` David Woodhouse
2018-01-25 12:03 ` Borislav Petkov
2018-01-25 12:11 ` David Woodhouse
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