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x86/cpu: Use parsed CPUID(0x0)

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Use parsed CPUID(0x0) instead of a direct CPUID query.

  [ bp: Drop the unnecessary NULL check. ]

Signed-off-by: Ahmed S. Darwish <darwi@linutronix.de>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://patch.msgid.link/20260528153923.403473-10-darwi@linutronix.de
This commit is contained in:
Ahmed S. Darwish 2026-05-28 17:37:31 +02:00 committed by Borislav Petkov (AMD)
parent bec89bf9ea
commit 21532edff7
1 changed files with 6 additions and 5 deletions
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11
arch/x86/kernel/cpu/common.c
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@ -942,11 +942,12 @@ void get_cpu_vendor(struct cpuinfo_x86 *c)
void cpu_detect(struct cpuinfo_x86 *c)
{
/* Get vendor name */
cpuid(0x00000000, (unsigned int *)&c->cpuid_level,
(unsigned int *)&c->x86_vendor_id[0],
(unsigned int *)&c->x86_vendor_id[8],
(unsigned int *)&c->x86_vendor_id[4]);
const struct leaf_0x0_0 *l0 = cpuid_leaf(c, 0x0);
c->cpuid_level = l0->max_std_leaf;
*(u32 *)&c->x86_vendor_id[0] = l0->cpu_vendorid_0;
*(u32 *)&c->x86_vendor_id[4] = l0->cpu_vendorid_1;
*(u32 *)&c->x86_vendor_id[8] = l0->cpu_vendorid_2;
c->x86 = 4;
/* Intel-defined flags: level 0x00000001 */