From: Borislav Petkov <bp@suse.de>
Date: Wed, 4 Dec 2013 11:31:31 +0000 (+0100)
Subject: x86, microcode: Share native MSR accessing variants
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e1b43e3f13f7157249fb962ccf88b84eb0421fb4;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

x86, microcode: Share native MSR accessing variants

We want to use those in AMD's early loading path too. Also, add a
native_wrmsrl variant.

Signed-off-by: Borislav Petkov <bp@suse.de>
Tested-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com>
---

diff --git a/arch/x86/include/asm/microcode.h b/arch/x86/include/asm/microcode.h
index f98bd6625318..b59827e76529 100644
--- a/arch/x86/include/asm/microcode.h
+++ b/arch/x86/include/asm/microcode.h
@@ -1,6 +1,21 @@
 #ifndef _ASM_X86_MICROCODE_H
 #define _ASM_X86_MICROCODE_H
 
+#define native_rdmsr(msr, val1, val2)			\
+do {							\
+	u64 __val = native_read_msr((msr));		\
+	(void)((val1) = (u32)__val);			\
+	(void)((val2) = (u32)(__val >> 32));		\
+} while (0)
+
+#define native_wrmsr(msr, low, high)			\
+	native_write_msr(msr, low, high)
+
+#define native_wrmsrl(msr, val)				\
+	native_write_msr((msr),				\
+			 (u32)((u64)(val)),		\
+			 (u32)((u64)(val) >> 32))
+
 struct cpu_signature {
 	unsigned int sig;
 	unsigned int pf;
diff --git a/arch/x86/kernel/microcode_intel_early.c b/arch/x86/kernel/microcode_intel_early.c
index 1575deb2e636..18f739129e72 100644
--- a/arch/x86/kernel/microcode_intel_early.c
+++ b/arch/x86/kernel/microcode_intel_early.c
@@ -365,16 +365,6 @@ out:
 	return state;
 }
 
-#define native_rdmsr(msr, val1, val2)		\
-do {						\
-	u64 __val = native_read_msr((msr));	\
-	(void)((val1) = (u32)__val);		\
-	(void)((val2) = (u32)(__val >> 32));	\
-} while (0)
-
-#define native_wrmsr(msr, low, high)		\
-	native_write_msr(msr, low, high);
-
 static int collect_cpu_info_early(struct ucode_cpu_info *uci)
 {
 	unsigned int val[2];