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| author | Borislav Petkov (AMD) <bp@alien8.de> | 2023-07-15 13:41:28 +0200 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2023-07-17 15:48:10 +0200 |
| commit | 522b1d69219d8f083173819fde04f994aa051a98 (patch) | |
| tree | 19cd08e9f27e7e50e9036c04f678565e3be6df82 /arch/x86/include/asm/microcode.h | |
| parent | 8b6f687743dacce83dbb0c7cfacf88bab00f808a (diff) | |
| download | lwn-522b1d69219d8f083173819fde04f994aa051a98.tar.gz lwn-522b1d69219d8f083173819fde04f994aa051a98.zip | |
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/microcode.h')
| -rw-r--r-- | arch/x86/include/asm/microcode.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/microcode.h b/arch/x86/include/asm/microcode.h index 320566a0443d..66dbba181bd9 100644 --- a/arch/x86/include/asm/microcode.h +++ b/arch/x86/include/asm/microcode.h @@ -5,6 +5,7 @@ #include <asm/cpu.h> #include <linux/earlycpio.h> #include <linux/initrd.h> +#include <asm/microcode_amd.h> struct ucode_patch { struct list_head plist; |