From fa05c3a7b328580f00aa3148d9a84c859e23514d Mon Sep 17 00:00:00 2001 From: Yazen Ghannam Date: Fri, 6 Dec 2024 16:11:55 +0000 Subject: [PATCH] x86/amd_nb: Restrict init function to AMD-based systems [ 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 Signed-off-by: Borislav Petkov (AMD) Link: https://lore.kernel.org/r/20241206161210.163701-3-yazen.ghannam@amd.com Signed-off-by: Sasha Levin --- 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 16cd56627574d..3dcaeb25ee301 100644 --- a/arch/x86/kernel/amd_nb.c +++ b/arch/x86/kernel/amd_nb.c @@ -536,6 +536,10 @@ 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(); -- 2.47.3