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

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[ 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>
This commit is contained in:
Yazen Ghannam
2024-12-06 16:11:55 +00:00
committed by Greg Kroah-Hartman
parent 448c419de6
commit 0f4fdc38f7
1 changed files with 4 additions and 0 deletions
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4
arch/x86/kernel/amd_nb.c
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@@ -519,6 +519,10 @@ 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();