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From: Borislav Petkov <bp@alien8.de>
To: X86 ML <x86@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH 1/5] x86/CPU: Add native CPUID variants returning a single datum
Date: Mon,  9 Jan 2017 12:41:43 +0100	[thread overview]
Message-ID: <20170109114147.5082-2-bp@alien8.de> (raw)
In-Reply-To: <20170109114147.5082-1-bp@alien8.de>

From: Borislav Petkov <bp@suse.de>

... similarly to the cpuid_<reg>() variants.

Signed-off-by: Borislav Petkov <bp@suse.de>
---
 arch/x86/include/asm/processor.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index eaf100508c36..1be64da0384e 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -219,6 +219,24 @@ static inline void native_cpuid(unsigned int *eax, unsigned int *ebx,
 	    : "memory");
 }
 
+#define native_cpuid_reg(reg)					\
+static inline unsigned int native_cpuid_##reg(unsigned int op)	\
+{								\
+	unsigned int eax = op, ebx, ecx = 0, edx;		\
+								\
+	native_cpuid(&eax, &ebx, &ecx, &edx);			\
+								\
+	return reg;						\
+}
+
+/*
+ * Native CPUID functions returning a single datum.
+ */
+native_cpuid_reg(eax)
+native_cpuid_reg(ebx)
+native_cpuid_reg(ecx)
+native_cpuid_reg(edx)
+
 static inline void load_cr3(pgd_t *pgdir)
 {
 	write_cr3(__pa(pgdir));
-- 
2.11.0

  reply	other threads:[~2017-01-09 11:41 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-01-09 11:41 [PATCH 0/5] x86/microcode: More urgent fixes Borislav Petkov
2017-01-09 11:41 ` Borislav Petkov [this message]
2017-01-09 22:16   ` [tip:x86/urgent] x86/CPU: Add native CPUID variants returning a single datum tip-bot for Borislav Petkov
2017-01-10  0:19     ` hpa
2017-01-10  9:04       ` Borislav Petkov
2017-01-10 16:40         ` hpa
2017-01-10 17:09           ` Borislav Petkov
2017-01-09 11:41 ` [PATCH 2/5] x86/microcode: Use native CPUID to tickle out microcode revision Borislav Petkov
2017-01-09 22:16   ` [tip:x86/urgent] " tip-bot for Borislav Petkov
2017-01-09 11:41 ` [PATCH 3/5] x86/microcode/intel: Add a helper which gives the " Borislav Petkov
2017-01-09 22:17   ` [tip:x86/urgent] " tip-bot for Borislav Petkov
2017-01-09 11:41 ` [PATCH 4/5] x86/microcode/intel: Fix allocation size of struct ucode_patch Borislav Petkov
2017-01-09 11:41 ` [PATCH 5/5] x86/microcode/intel: Use correct buffer size for saving microcode data Borislav Petkov

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