diff mbox series

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

Message ID 20241023172150.659002-3-yazen.ghannam@amd.com (mailing list archive)
State New
Headers show
Series AMD NB and SMN rework | expand

Commit Message

Yazen Ghannam Oct. 23, 2024, 5:21 p.m. UTC 
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 mbox series

Patch

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();