This is a note to let you know that I've just added the patch titled
x86/cpu/amd: Enable Zenbleed fix for AMD Custom APU 0405
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
x86-cpu-amd-enable-zenbleed-fix-for-amd-custom-apu-0405.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6dbef74aeb090d6bee7d64ef3fa82ae6fa53f271 Mon Sep 17 00:00:00 2001
From: Cristian Ciocaltea <cristian.ciocaltea@xxxxxxxxxxxxx>
Date: Fri, 11 Aug 2023 23:37:05 +0300
Subject: x86/cpu/amd: Enable Zenbleed fix for AMD Custom APU 0405
From: Cristian Ciocaltea <cristian.ciocaltea@xxxxxxxxxxxxx>
commit 6dbef74aeb090d6bee7d64ef3fa82ae6fa53f271 upstream.
Commit
522b1d69219d ("x86/cpu/amd: Add a Zenbleed fix")
provided a fix for the Zen2 VZEROUPPER data corruption bug affecting
a range of CPU models, but the AMD Custom APU 0405 found on SteamDeck
was not listed, although it is clearly affected by the vulnerability.
Add this CPU variant to the Zenbleed erratum list, in order to
unconditionally enable the fallback fix until a proper microcode update
is available.
Fixes: 522b1d69219d ("x86/cpu/amd: Add a Zenbleed fix")
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@xxxxxxxxxxxxx>
Signed-off-by: Borislav Petkov (AMD) <bp@xxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Link: https://lore.kernel.org/r/20230811203705.1699914-1-cristian.ciocaltea@xxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/cpu/amd.c | 1 +
1 file changed, 1 insertion(+)
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -73,6 +73,7 @@ static const int amd_erratum_1054[] =
static const int amd_zenbleed[] =
AMD_LEGACY_ERRATUM(AMD_MODEL_RANGE(0x17, 0x30, 0x0, 0x4f, 0xf),
AMD_MODEL_RANGE(0x17, 0x60, 0x0, 0x7f, 0xf),
+ AMD_MODEL_RANGE(0x17, 0x90, 0x0, 0x91, 0xf),
AMD_MODEL_RANGE(0x17, 0xa0, 0x0, 0xaf, 0xf));
static const int amd_div0[] =
Patches currently in stable-queue which might be from cristian.ciocaltea@xxxxxxxxxxxxx are
queue-6.1/x86-cpu-amd-enable-zenbleed-fix-for-amd-custom-apu-0405.patch
