From: David Woodhouse <dwmw2@infradead.org>
To: x86@kernel.org
Cc: linux-arch@vger.kernel.org
Subject: [PATCH] x86: require MOVBE feature in cpuid when we use it
Date: Mon, 28 Jan 2013 17:49:50 +0000 [thread overview]
Message-ID: <1359395390.3529.65.camel@shinybook.infradead.org> (raw)
In-Reply-To: <1355966180.18919.102.camel@shinybook.infradead.org>
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Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/arch/x86/include/asm/required-features.h b/arch/x86/include/asm/required-features.h
index 6c7fc25..5c6e4fb 100644
--- a/arch/x86/include/asm/required-features.h
+++ b/arch/x86/include/asm/required-features.h
@@ -47,6 +47,12 @@
# define NEED_NOPL 0
#endif
+#ifdef CONFIG_MATOM
+# define NEED_MOVBE (1<<(X86_FEATURE_MOVBE & 31))
+#else
+# define NEED_MOVBE 0
+#endif
+
#ifdef CONFIG_X86_64
#ifdef CONFIG_PARAVIRT
/* Paravirtualized systems may not have PSE or PGE available */
@@ -80,7 +86,7 @@
#define REQUIRED_MASK2 0
#define REQUIRED_MASK3 (NEED_NOPL)
-#define REQUIRED_MASK4 0
+#define REQUIRED_MASK4 (NEED_MOVBE)
#define REQUIRED_MASK5 0
#define REQUIRED_MASK6 0
#define REQUIRED_MASK7 0
--
David Woodhouse Open Source Technology Centre
David.Woodhouse@intel.com Intel Corporation
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prev parent reply other threads:[~2013-01-28 17:49 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-20 1:16 [PATCH] x86: enable ARCH_USE_BUILTIN_BSWAP David Woodhouse
2013-01-28 17:49 ` David Woodhouse [this message]
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