x86/cpu/amd: Add a Zenbleed fix
stable inclusion from stable-v5.10.187 commit 93df00f9d48d48466ddbe01a06eaaf3311ecfb53 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I7NLYY CVE: CVE-2023-20593 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=93df00f9d48d48466ddbe01a06eaaf3311ecfb53 -------------------------------- 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: NBorislav Petkov (AMD) <bp@alien8.de> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org> Conflicts: arch/x86/include/asm/microcode_amd.h arch/x86/kernel/cpu/common.c Signed-off-by: NYu Liao <liaoyu15@huawei.com>
Showing
想要评论请 注册 或 登录