5.4-stable review patch. If anyone has any objections, please let me know.
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From: Yazen Ghannam yazen.ghannam@amd.com
[ Upstream commit bee9e840609cc67d0a7d82f22a2130fb7a0a766d ]
The code implicitly operates on AMD-based systems by matching on PCI IDs. However, the use of these IDs is going away.
Add an explicit CPU vendor check instead of relying on PCI IDs.
Signed-off-by: Yazen Ghannam yazen.ghannam@amd.com Signed-off-by: Borislav Petkov (AMD) bp@alien8.de Link: https://lore.kernel.org/r/20241206161210.163701-3-yazen.ghannam@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/x86/kernel/amd_nb.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/arch/x86/kernel/amd_nb.c b/arch/x86/kernel/amd_nb.c index e3b5de7b95988..ead78f981345c 100644 --- a/arch/x86/kernel/amd_nb.c +++ b/arch/x86/kernel/amd_nb.c @@ -538,6 +538,10 @@ static __init void fix_erratum_688(void)
static __init int init_amd_nbs(void) { + if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD && + boot_cpu_data.x86_vendor != X86_VENDOR_HYGON) + return 0; + amd_cache_northbridges(); amd_cache_gart();