x86, xsave: xsave cpuid feature bits

Add xsave CPU feature bits.
Signed-off-by: NSuresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/x86/kernel/cpu/feature_names.c

@@ -46,7 +46,7 @@ const char * const x86_cap_flags[NCAPINTS*32] = {
 	"pni", NULL, NULL, "monitor", "ds_cpl", "vmx", "smx", "est",
 	"tm2", "ssse3", "cid", NULL, NULL, "cx16", "xtpr", NULL,
 	NULL, NULL, "dca", "sse4_1", "sse4_2", "x2apic", NULL, "popcnt",
-	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+	NULL, NULL, "xsave", NULL, NULL, NULL, NULL, NULL,
 
 	/* VIA/Cyrix/Centaur-defined */
 	NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en",

include/asm-x86/cpufeature.h

@@ -92,6 +92,7 @@
 #define X86_FEATURE_XTPR	(4*32+14) /* Send Task Priority Messages */
 #define X86_FEATURE_DCA		(4*32+18) /* Direct Cache Access */
 #define X86_FEATURE_X2APIC	(4*32+21) /* x2APIC */
+#define X86_FEATURE_XSAVE	(4*32+26) /* XSAVE */
 
 /* VIA/Cyrix/Centaur-defined CPU features, CPUID level 0xC0000001, word 5 */
 #define X86_FEATURE_XSTORE	(5*32+ 2) /* on-CPU RNG present (xstore insn) */
@@ -191,6 +192,7 @@ extern const char * const x86_power_flags[32];
 #define cpu_has_arch_perfmon	boot_cpu_has(X86_FEATURE_ARCH_PERFMON)
 #define cpu_has_pat		boot_cpu_has(X86_FEATURE_PAT)
 #define cpu_has_x2apic		boot_cpu_has(X86_FEATURE_X2APIC)
+#define cpu_has_xsave		boot_cpu_has(X86_FEATURE_XSAVE)
 
 #if defined(CONFIG_X86_INVLPG) || defined(CONFIG_X86_64)
 # define cpu_has_invlpg		1