diff options
| author | Borislav Petkov (AMD) <bp@alien8.de> | 2023-07-15 14:41:28 +0300 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2023-07-17 16:48:10 +0300 |
| commit | 522b1d69219d8f083173819fde04f994aa051a98 (patch) | |
| tree | 19cd08e9f27e7e50e9036c04f678565e3be6df82 /arch/x86/include/asm/msr-index.h | |
| parent | 8b6f687743dacce83dbb0c7cfacf88bab00f808a (diff) | |
| download | linux-522b1d69219d8f083173819fde04f994aa051a98.tar.xz | |
x86/cpu/amd: Add a Zenbleed fix
Add a fix for the Zen2 VZEROUPPER data corruption bug where under
certain circumstances executing VZEROUPPER can cause register
corruption or leak data.
The optimal fix is through microcode but in the case the proper
microcode revision has not been applied, enable a fallback fix using
a chicken bit.
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Diffstat (limited to 'arch/x86/include/asm/msr-index.h')
| -rw-r--r-- | arch/x86/include/asm/msr-index.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h index 3aedae61af4f..a00a53e15ab7 100644 --- a/arch/x86/include/asm/msr-index.h +++ b/arch/x86/include/asm/msr-index.h @@ -545,6 +545,7 @@ #define MSR_AMD64_DE_CFG 0xc0011029 #define MSR_AMD64_DE_CFG_LFENCE_SERIALIZE_BIT 1 #define MSR_AMD64_DE_CFG_LFENCE_SERIALIZE BIT_ULL(MSR_AMD64_DE_CFG_LFENCE_SERIALIZE_BIT) +#define MSR_AMD64_DE_CFG_ZEN2_FP_BACKUP_FIX_BIT 9 #define MSR_AMD64_BU_CFG2 0xc001102a #define MSR_AMD64_IBSFETCHCTL 0xc0011030 |