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Subject[PATCH 10/15 -tip] x86: Add cpufeature for System configuration
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X86_FEATURE_SYS_CFG (System configuration MSRs) :
MSRC001_0010 System Configuration Register (SYS_CFG)
MSRC001_001F Northbridge Configuration Register (NB_CFG)

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
---
arch/x86/include/asm/cpufeature.h | 1 +
arch/x86/kernel/cpu/amd.c | 8 ++++++++
2 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index 13050e9..674493f 100644
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -164,6 +164,7 @@
#define X86_FEATURE_MISC (7*32+ 9) /* Miscellaneous features */
#define X86_FEATURE_PLATFORM (7*32+ 10) /* Platform feature */
#define X86_FEATURE_HW_CFG (7*32+ 11) /* Hardware configuration */
+#define X86_FEATURE_SYS_CFG (7*32+ 12) /* System configuration */

/* Virtualization flags: Linux defined */
#define X86_FEATURE_TPR_SHADOW (8*32+ 0) /* Intel TPR Shadow */
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index b2bccd2..8a8db1a 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -482,6 +482,14 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
/* MSRC001_0015 Hardware Configuration Register (HWCR) */
set_cpu_cap(c, X86_FEATURE_HW_CFG);
}
+ if (c->x86 >= 8) { /* K8+ */
+ /*
+ * System configuration MSRs:
+ * MSRC001_0010 System Configuration Register (SYS_CFG)
+ * MSRC001_001F Northbridge Configuration Register (NB_CFG)
+ */
+ set_cpu_cap(c, X86_FEATURE_SYS_CFG);
+ }
if (c->x86 >= 0x10) { /* fam10h+ */
/* MSRC001_1022 Data Cache Configuration (DC_CFG) */
set_cpu_cap(c, X86_FEATURE_CACHE_CTL);
--
1.6.0.6




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