[PATCH v7 011/120] x86/cpu: Use parsed CPUID(0x1)

On early boot CPU detection, use parsed CPUID(0x1) instead of a direct
CPUID query.

Beside the parser's centralization benefits, this allows using the auto
generated CPUID data types, and their C99 bitfields, instead of doing ugly
bitwise operations.

Signed-off-by: Ahmed S. Darwish <[email protected]>
---
 arch/x86/kernel/cpu/common.c | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 281dc591ea79..257808609ef5 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -943,6 +943,7 @@ void get_cpu_vendor(struct cpuinfo_x86 *c)
 void cpu_detect(struct cpuinfo_x86 *c)
 {
 	const struct leaf_0x0_0 *l0 = cpuid_leaf(c, 0x0);
+	const struct leaf_0x1_0 *l1 = cpuid_leaf(c, 0x1);
 
 	if (!l0)
 		return;
@@ -953,17 +954,13 @@ void cpu_detect(struct cpuinfo_x86 *c)
 	*(u32 *)&c->x86_vendor_id[8] = l0->cpu_vendorid_2;
 
 	c->x86 = 4;
-	/* Intel-defined flags: level 0x00000001 */
-	if (c->cpuid_level >= 0x00000001) {
-		u32 junk, tfms, cap0, misc;
-
-		cpuid(0x00000001, &tfms, &misc, &junk, &cap0);
-		c->x86		= x86_family(tfms);
-		c->x86_model	= x86_model(tfms);
-		c->x86_stepping	= x86_stepping(tfms);
+	if (l1) {
+		c->x86		= cpuid_family(l1);
+		c->x86_model	= cpuid_model(l1);
+		c->x86_stepping	= l1->stepping;
 
-		if (cap0 & (1<<19)) {
-			c->x86_clflush_size = ((misc >> 8) & 0xff) * 8;
+		if (l1->clflush) {
+			c->x86_clflush_size = l1->clflush_size * 8;
 			c->x86_cache_alignment = c->x86_clflush_size;
 		}
 	}
-- 
2.54.0