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.
Cc: stable@vger.kernel.org Signed-off-by: Cristian Ciocaltea cristian.ciocaltea@collabora.com --- arch/x86/kernel/cpu/amd.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index b55d8f82b621..70f9d56f9305 100644 --- 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[] =
The following commit has been merged into the x86/urgent branch of tip:
Commit-ID: 6dbef74aeb090d6bee7d64ef3fa82ae6fa53f271 Gitweb: https://git.kernel.org/tip/6dbef74aeb090d6bee7d64ef3fa82ae6fa53f271 Author: Cristian Ciocaltea cristian.ciocaltea@collabora.com AuthorDate: Fri, 11 Aug 2023 23:37:05 +03:00 Committer: Borislav Petkov (AMD) bp@alien8.de CommitterDate: Fri, 11 Aug 2023 22:52:29 +02:00
x86/cpu/amd: Enable Zenbleed fix for AMD Custom APU 0405
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@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@collab... --- arch/x86/kernel/cpu/amd.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index 26ad7ca..c15b4f0 100644 --- 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 bool cpu_has_amd_erratum(struct cpuinfo_x86 *cpu, const int *erratum)
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