x86, cpu: Make init_scattered_cpuid_features() consider cpuid subleaves

Some 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@intel.com>
LKML-Reference: <20100719230205.439900717@sbs-t61.sc.intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

1 files changed, 13 insertions, 12 deletions

diff --git a/arch/x86/kernel/cpu/addon_cpuid_features.c b/arch/x86/kernel/cpu/addon_cpuid_features.c
index 7369b4c2c55a..03cf24a3d933 100644
--- a/arch/x86/kernel/cpu/addon_cpuid_features.c
+++ b/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_features(struct cpuinfo_x86 *c)
         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_features(struct cpuinfo_x86 *c)
                     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);