[PATCH 02/16] x86/amd_nb: Restrict init function to AMD-based systems

Yazen Ghannam
2024-10-23T17:22:08Z

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>
---
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 9fe9972d2071..37b8244899d8 100644
--- a/arch/x86/kernel/amd_nb.c
+++ b/arch/x86/kernel/amd_nb.c
@@ -582,6 +582,10 @@ 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();

--
2.43.0