On Mon, Oct 16, 2023 at 09:55:37AM +0200, Borislav Petkov wrote:
From: "Borislav Petkov (AMD)" bp@alien8.de Date: Sat, 7 Oct 2023 12:57:02 +0200 Subject: [PATCH] x86/cpu: Fix AMD erratum #1485 on Zen4-based CPUs MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit
Upstream commit f454b18e07f518bcd0c05af17a2239138bff52de.
Fix erratum #1485 on Zen4 parts where running with STIBP disabled can cause an #UD exception. The performance impact of the fix is negligible.
Reported-by: René Rebe rene@exactcode.de Signed-off-by: Borislav Petkov (AMD) bp@alien8.de Tested-by: René Rebe rene@exactcode.de Cc: stable@kernel.org Link: https://lore.kernel.org/r/D99589F4-BC5D-430B-87B2-72C20370CF57@exactcode.com
arch/x86/include/asm/msr-index.h | 4 ++++ arch/x86/kernel/cpu/amd.c | 9 +++++++++ 2 files changed, 13 insertions(+)
Now queued up, thanks.
greg k-h