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x86/CPU/AMD: Add X86_FEATURE_ZEN6

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Add a synthetic feature flag for Zen6.

  [  bp: Move the feature flag to a free slot and avoid future merge
     conflicts from incoming stuff. ]

Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/20250513204857.3376577-1-yazen.ghannam@amd.com
This commit is contained in:
Yazen Ghannam 2025-05-13 20:48:57 +00:00 • committed by Borislav Petkov (AMD)
parent 82b7f88f23
commit 24ee8d9432
2 changed files with 6 additions and 1 deletions
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2
arch/x86/include/asm/cpufeatures.h
View file

@ -75,7 +75,7 @@
#define X86_FEATURE_CENTAUR_MCR ( 3*32+ 3) /* "centaur_mcr" Centaur MCRs (= MTRRs) */
#define X86_FEATURE_K8 ( 3*32+ 4) /* Opteron, Athlon64 */
#define X86_FEATURE_ZEN5 ( 3*32+ 5) /* CPU based on Zen5 microarchitecture */
/* Free ( 3*32+ 6) */
#define X86_FEATURE_ZEN6 ( 3*32+ 6) /* CPU based on Zen6 microarchitecture */
/* Free ( 3*32+ 7) */
#define X86_FEATURE_CONSTANT_TSC ( 3*32+ 8) /* "constant_tsc" TSC ticks at a constant rate */
#define X86_FEATURE_UP ( 3*32+ 9) /* "up" SMP kernel running on UP */

5
arch/x86/kernel/cpu/amd.c
View file

@ -472,6 +472,11 @@ static void bsp_init_amd(struct cpuinfo_x86 *c)
case 0x60 ... 0x7f:
setup_force_cpu_cap(X86_FEATURE_ZEN5);
break;
case 0x50 ... 0x5f:
case 0x90 ... 0xaf:
case 0xc0 ... 0xcf:
setup_force_cpu_cap(X86_FEATURE_ZEN6);
break;
default:
goto warn;
}