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x86/amd_nb: Restrict init function to AMD-based systems

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[ Upstream commit bee9e84060 ]

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>
This commit is contained in:
Yazen Ghannam 2024-12-06 16:11:55 +00:00 committed by Greg Kroah-Hartman
parent 52ecfa7c16
commit fa05c3a7b3
1 changed files with 4 additions and 0 deletions
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4
arch/x86/kernel/amd_nb.c
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@ -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();