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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
Subject: [PATCH v3 2/6] x86/cpufeatures: Add Intel feature bits for Speculation Control
Date: Wed, 24 Jan 2018 16:57:01 +0000	[thread overview]
Message-ID: <1516813025-10794-3-git-send-email-dwmw@amazon.co.uk> (raw)
In-Reply-To: <1516813025-10794-1-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: 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

  parent reply	other threads:[~2018-01-24 16:57 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-01-24 16:56 [PATCH v3 0/6] Basic Speculation Control feature support David Woodhouse
2018-01-24 16:57 ` [PATCH v3 1/6] x86/cpufeatures: Add CPUID_7_EDX CPUID leaf David Woodhouse
2018-01-24 17:18   ` Greg KH
2018-01-24 16:57 ` David Woodhouse [this message]
2018-01-24 17:18   ` [PATCH v3 2/6] x86/cpufeatures: Add Intel feature bits for Speculation Control Greg KH
2018-01-24 16:57 ` [PATCH v3 3/6] x86/cpufeatures: Add AMD " David Woodhouse
2018-01-24 17:20   ` Greg KH
2018-01-24 17:57     ` David Woodhouse
2018-01-24 22:52       ` Tom Lendacky
2018-02-20 15:22         ` Tom Lendacky
2018-01-24 16:57 ` [PATCH v3 4/6] x86/msr: Add definitions for new speculation control MSRs David Woodhouse
2018-01-24 17:16   ` Greg KH
2018-01-24 16:57 ` [PATCH v3 5/6] x86/pti: Do not enable PTI on processors which are not vulnerable to Meltdown David Woodhouse
2018-01-24 17:26   ` Greg KH
2018-01-26 12:14   ` Yves-Alexis Perez
2018-01-26 12:27     ` David Woodhouse
2018-01-26 15:27     ` Dave Hansen
2018-01-26 15:30       ` Arjan van de Ven
2018-01-26 16:47     ` Alan Cox
2018-01-24 16:57 ` [PATCH v3 6/6] x86/cpufeature: Blacklist SPEC_CTRL on early Spectre v2 microcodes David Woodhouse
2018-01-24 17:29   ` Greg KH
2018-01-24 17:58     ` David Woodhouse
2018-01-24 21:29     ` Ingo Molnar
2018-01-26 12:16   ` Yves-Alexis Perez
2018-01-26 12:27     ` David Woodhouse

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