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| author | Borislav Petkov (AMD) <bp@alien8.de> | 2024-01-04 21:11:37 +0100 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2024-01-23 11:06:18 +0100 |
| commit | 3e4147f33f8b647775357bae0248b9a2aeebfcd2 (patch) | |
| tree | 68e55caeef39cbe1d8dc15f01fd79e2015d22978 /arch/x86/kernel/cpu | |
| parent | f7cfe7017b531e08c108ac6615b1ddedcc892428 (diff) | |
| download | lwn-3e4147f33f8b647775357bae0248b9a2aeebfcd2.tar.gz lwn-3e4147f33f8b647775357bae0248b9a2aeebfcd2.zip | |
x86/CPU/AMD: Add X86_FEATURE_ZEN5
Add a synthetic feature flag for Zen5.
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20240104201138.5072-1-bp@alien8.de
Diffstat (limited to 'arch/x86/kernel/cpu')
| -rw-r--r-- | arch/x86/kernel/cpu/amd.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index 9f42d1c59e09..bc49e3b3aae0 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -538,7 +538,7 @@ static void bsp_init_amd(struct cpuinfo_x86 *c) /* Figure out Zen generations: */ switch (c->x86) { - case 0x17: { + case 0x17: switch (c->x86_model) { case 0x00 ... 0x2f: case 0x50 ... 0x5f: @@ -554,8 +554,8 @@ static void bsp_init_amd(struct cpuinfo_x86 *c) goto warn; } break; - } - case 0x19: { + + case 0x19: switch (c->x86_model) { case 0x00 ... 0x0f: case 0x20 ... 0x5f: @@ -569,7 +569,17 @@ static void bsp_init_amd(struct cpuinfo_x86 *c) goto warn; } break; - } + + case 0x1a: + switch (c->x86_model) { + case 0x00 ... 0x0f: + setup_force_cpu_cap(X86_FEATURE_ZEN5); + break; + default: + goto warn; + } + break; + default: break; } @@ -1039,6 +1049,11 @@ static void init_amd_zen4(struct cpuinfo_x86 *c) 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) { u64 vm_cr; @@ -1084,6 +1099,8 @@ static void init_amd(struct cpuinfo_x86 *c) init_amd_zen3(c); else if (boot_cpu_has(X86_FEATURE_ZEN4)) init_amd_zen4(c); + else if (boot_cpu_has(X86_FEATURE_ZEN5)) + init_amd_zen5(c); /* * Enable workaround for FXSAVE leak on CPUs |