diff options
| author | Borislav Petkov (AMD) <bp@alien8.de> | 2023-07-15 13:41:28 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-07-24 19:10:53 +0200 |
| commit | 00363ef30797211c247605464dc3daaa988531a2 (patch) | |
| tree | b67307a9a45a5591c0bf94e080be2e1ff682f589 /arch/x86/kernel/cpu/common.c | |
| parent | 92b292bed627f18b8ad9e0ad6cdbde47eeeb9a8e (diff) | |
x86/cpu/amd: Add a Zenbleed fix
Upstream commit: 522b1d69219d8f083173819fde04f994aa051a98
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/x86/kernel/cpu/common.c')
| -rw-r--r-- | arch/x86/kernel/cpu/common.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index 5e1e32f1086b..c8ccf5bfd534 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -2125,6 +2125,8 @@ void microcode_check(void) perf_check_microcode(); + amd_check_microcode(); + /* Reload CPUID max function as it might've changed. */ info.cpuid_level = cpuid_eax(0); |