diff options
| author | Borislav Petkov (AMD) <bp@alien8.de> | 2023-11-01 11:20:01 +0100 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2023-11-29 12:12:20 +0100 |
| commit | cfbf4f992bfce1fa9f2f347a79cbbea0368e7971 (patch) | |
| tree | 9deb8f90d36ec12293f51b4fe72bf43ac05f9656 /arch/x86/kernel/cpu/amd.c | |
| parent | x86/CPU/AMD: Move erratum 1076 fix into the Zen1 init function (diff) | |
| download | linux-cfbf4f992bfce1fa9f2f347a79cbbea0368e7971.tar.xz linux-cfbf4f992bfce1fa9f2f347a79cbbea0368e7971.zip | |
x86/CPU/AMD: Call the spectral chicken in the Zen2 init function
No functional change.
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Nikolay Borisov <nik.borisov@suse.com>
Link: http://lore.kernel.org/r/20231120104152.13740-6-bp@alien8.de
Diffstat (limited to 'arch/x86/kernel/cpu/amd.c')
| -rw-r--r-- | arch/x86/kernel/cpu/amd.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index ebe6be8b57ce..82747b6bc6e0 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -1007,10 +1007,8 @@ void init_spectral_chicken(struct cpuinfo_x86 *c) * * This suppresses speculation from the middle of a basic block, i.e. it * suppresses non-branch predictions. - * - * We use STIBP as a heuristic to filter out Zen2 from the rest of F17H */ - if (!cpu_has(c, X86_FEATURE_HYPERVISOR) && cpu_has(c, X86_FEATURE_AMD_STIBP)) { + if (!cpu_has(c, X86_FEATURE_HYPERVISOR)) { if (!rdmsrl_safe(MSR_ZEN2_SPECTRAL_CHICKEN, &value)) { value |= MSR_ZEN2_SPECTRAL_CHICKEN_BIT; wrmsrl_safe(MSR_ZEN2_SPECTRAL_CHICKEN, value); @@ -1081,6 +1079,7 @@ static void zenbleed_check(struct cpuinfo_x86 *c) static void init_amd_zen2(struct cpuinfo_x86 *c) { + init_spectral_chicken(c); fix_erratum_1386(c); } @@ -1136,7 +1135,7 @@ static void init_amd(struct cpuinfo_x86 *c) case 0x12: init_amd_ln(c); break; case 0x15: init_amd_bd(c); break; case 0x16: init_amd_jg(c); break; - case 0x17: init_spectral_chicken(c); + case 0x17: fallthrough; case 0x19: init_amd_zn(c); break; } |