diff options
| author | Joerg Roedel <jroedel@suse.de> | 2023-10-26 17:05:58 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2023-10-26 17:05:58 +0200 |
| commit | 3613047280ec42a4e1350fdc1a6dd161ff4008cc (patch) | |
| tree | 6cf2f03f518537f3229e6066a8b2638755f0bb48 /arch/x86/kernel/cpu/amd.c | |
| parent | bbc70e0aec287e164344b1a071bd46466a4f29b3 (diff) | |
| parent | 05d3ef8bba77c1b5f98d941d8b2d4aeab8118ef1 (diff) | |
Merge tag 'v6.6-rc7' into core
Linux 6.6-rc7
Diffstat (limited to 'arch/x86/kernel/cpu/amd.c')
| -rw-r--r-- | arch/x86/kernel/cpu/amd.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index 03ef962a6992..ece2b5b7b0fe 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -80,6 +80,10 @@ static const int amd_div0[] = AMD_LEGACY_ERRATUM(AMD_MODEL_RANGE(0x17, 0x00, 0x0, 0x2f, 0xf), AMD_MODEL_RANGE(0x17, 0x50, 0x0, 0x5f, 0xf)); +static const int amd_erratum_1485[] = + AMD_LEGACY_ERRATUM(AMD_MODEL_RANGE(0x19, 0x10, 0x0, 0x1f, 0xf), + AMD_MODEL_RANGE(0x19, 0x60, 0x0, 0xaf, 0xf)); + static bool cpu_has_amd_erratum(struct cpuinfo_x86 *cpu, const int *erratum) { int osvw_id = *erratum++; @@ -1149,6 +1153,10 @@ static void init_amd(struct cpuinfo_x86 *c) pr_notice_once("AMD Zen1 DIV0 bug detected. Disable SMT for full protection.\n"); setup_force_cpu_bug(X86_BUG_DIV0); } + + if (!cpu_has(c, X86_FEATURE_HYPERVISOR) && + cpu_has_amd_erratum(c, amd_erratum_1485)) + msr_set_bit(MSR_ZEN4_BP_CFG, MSR_ZEN4_BP_CFG_SHARED_BTB_FIX_BIT); } #ifdef CONFIG_X86_32 |