[patch 3/5] x86: extend init_scattered_cpuid_features() to consider cpuid subleaves

[Suresh Siddha]

cpuid features (like xsaveopt) are enumerated using cpuid subleaves.

Extend init_scattered_cpuid_features() to take subleaf into account.

Signed-off-by: Suresh Siddha <suresh.b.siddha@xxxxxxxxx>
---
 arch/x86/kernel/cpu/addon_cpuid_features.c |   25 +++++++++++++------------
 1 file changed, 13 insertions(+), 12 deletions(-)

Index: tip-linux-2.6/arch/x86/kernel/cpu/addon_cpuid_features.c
===================================================================
--- tip-linux-2.6.orig/arch/x86/kernel/cpu/addon_cpuid_features.c
+++ tip-linux-2.6/arch/x86/kernel/cpu/addon_cpuid_features.c
@@ -14,6 +14,7 @@ struct cpuid_bit {
 	u8 reg;
 	u8 bit;
 	u32 level;
+	u32 sub_leaf;
 };
 
 enum cpuid_regs {
@@ -30,16 +31,16 @@ void __cpuinit init_scattered_cpuid_feat
 	const struct cpuid_bit *cb;
 
 	static const struct cpuid_bit __cpuinitconst cpuid_bits[] = {
-		{ X86_FEATURE_IDA,   		CR_EAX, 1, 0x00000006 },
-		{ X86_FEATURE_ARAT,  		CR_EAX, 2, 0x00000006 },
-		{ X86_FEATURE_APERFMPERF,	CR_ECX, 0, 0x00000006 },
-		{ X86_FEATURE_EPB,		CR_ECX, 3, 0x00000006 },
-		{ X86_FEATURE_CPB,   		CR_EDX, 9, 0x80000007 },
-		{ X86_FEATURE_NPT,   		CR_EDX, 0, 0x8000000a },
-		{ X86_FEATURE_LBRV,  		CR_EDX, 1, 0x8000000a },
-		{ X86_FEATURE_SVML,  		CR_EDX, 2, 0x8000000a },
-		{ X86_FEATURE_NRIPS, 		CR_EDX, 3, 0x8000000a },
-		{ 0, 0, 0, 0 }
+		{ X86_FEATURE_IDA,		CR_EAX, 1, 0x00000006, 0 },
+		{ X86_FEATURE_ARAT,		CR_EAX, 2, 0x00000006, 0 },
+		{ X86_FEATURE_APERFMPERF,	CR_ECX, 0, 0x00000006, 0 },
+		{ X86_FEATURE_EPB,		CR_ECX, 3, 0x00000006, 0 },
+		{ X86_FEATURE_CPB,		CR_EDX, 9, 0x80000007, 0 },
+		{ X86_FEATURE_NPT,		CR_EDX, 0, 0x8000000a, 0 },
+		{ X86_FEATURE_LBRV,		CR_EDX, 1, 0x8000000a, 0 },
+		{ X86_FEATURE_SVML,		CR_EDX, 2, 0x8000000a, 0 },
+		{ X86_FEATURE_NRIPS,		CR_EDX, 3, 0x8000000a, 0 },
+		{ 0, 0, 0, 0, 0 }
 	};
 
 	for (cb = cpuid_bits; cb->feature; cb++) {
@@ -50,8 +51,8 @@ void __cpuinit init_scattered_cpuid_feat
 		    max_level > (cb->level | 0xffff))
 			continue;
 
-		cpuid(cb->level, &regs[CR_EAX], &regs[CR_EBX],
-			&regs[CR_ECX], &regs[CR_EDX]);
+		cpuid_count(cb->level, cb->sub_leaf, &regs[CR_EAX],
+			    &regs[CR_EBX], &regs[CR_ECX], &regs[CR_EDX]);
 
 		if (regs[cb->reg] & (1 << cb->bit))
 			set_cpu_cap(c, cb->feature);


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