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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2024-03-11 17:25:45 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2024-03-11 17:25:45 -0700 |
| commit | 742582acec1e894b80815ab379e1c9d347a0406b (patch) | |
| tree | d8f5dd2562882db77066a10a4aeca2dc29a4ac77 | |
| parent | d8941ce52b708cfd520994e65760a2fa6a646dfb (diff) | |
| parent | 03ceaf678d444e67fb9c1a372458ba869aa37a60 (diff) | |
| download | linux-fs-742582acec1e894b80815ab379e1c9d347a0406b.tar.gz | |
Merge tag 'x86_cpu_for_v6.9_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 cpu update from Borislav Petkov:
- Have AMD Zen common init code run on all families from Zen1 onwards
in order to save some future enablement effort
* tag 'x86_cpu_for_v6.9_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/CPU/AMD: Do the common init on future Zens too
| -rw-r--r-- | arch/x86/kernel/cpu/amd.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index c82069e5f3419a..9cfd4e99944dc0 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -828,7 +828,6 @@ static void init_amd_zen_common(void) static void init_amd_zen1(struct cpuinfo_x86 *c) { - init_amd_zen_common(); fix_erratum_1386(c); /* Fix up CPUID bits, but only if not virtualised. */ @@ -882,7 +881,6 @@ static void zen2_zenbleed_check(struct cpuinfo_x86 *c) static void init_amd_zen2(struct cpuinfo_x86 *c) { - init_amd_zen_common(); init_spectral_chicken(c); fix_erratum_1386(c); zen2_zenbleed_check(c); @@ -890,8 +888,6 @@ static void init_amd_zen2(struct cpuinfo_x86 *c) static void init_amd_zen3(struct cpuinfo_x86 *c) { - init_amd_zen_common(); - if (!cpu_has(c, X86_FEATURE_HYPERVISOR)) { /* * Zen3 (Fam19 model < 0x10) parts are not susceptible to @@ -905,15 +901,12 @@ static void init_amd_zen3(struct cpuinfo_x86 *c) static void init_amd_zen4(struct cpuinfo_x86 *c) { - init_amd_zen_common(); - if (!cpu_has(c, X86_FEATURE_HYPERVISOR)) msr_set_bit(MSR_ZEN4_BP_CFG, MSR_ZEN4_BP_CFG_SHARED_BTB_FIX_BIT); } static void init_amd_zen5(struct cpuinfo_x86 *c) { - init_amd_zen_common(); } static void init_amd(struct cpuinfo_x86 *c) @@ -950,6 +943,13 @@ static void init_amd(struct cpuinfo_x86 *c) case 0x16: init_amd_jg(c); break; } + /* + * Save up on some future enablement work and do common Zen + * settings. + */ + if (c->x86 >= 0x17) + init_amd_zen_common(); + if (boot_cpu_has(X86_FEATURE_ZEN1)) init_amd_zen1(c); else if (boot_cpu_has(X86_FEATURE_ZEN2)) |