x86/cpu/amd: Enable Zenbleed fix for AMD Custom APU 0405

stable inclusion
from stable-v5.10.191
commit eda9f8ffca46570acda76ad1da8cb8b8f5ccc5a3
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=eda9f8ffca46570acda76ad1da8cb8b8f5ccc5a3



--------------------------------

commit 6dbef74a upstream.

Commit

  522b1d69 ("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: 522b1d69 ("x86/cpu/amd: Add a Zenbleed fix")
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20230811203705.1699914-1-cristian.ciocaltea@collabora.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Yu Liao <liaoyu15@huawei.com>