To prevent further PCI device ids checking in early_gart_iommu_check which cannot happen both on Hygon and Intel platform, the function amd_gart_present should return if it's not a AMD CPU.
Also only AMD or Hygon CPU should use the functionality provided by early_is_amd_nb. Signed-off-by: Pu Wen <[email protected]> --- arch/x86/include/asm/amd_nb.h | 3 +++ arch/x86/kernel/amd_nb.c | 4 ++++ 2 files changed, 7 insertions(+) diff --git a/arch/x86/include/asm/amd_nb.h b/arch/x86/include/asm/amd_nb.h index fddb6d2..1ae4e57 100644 --- a/arch/x86/include/asm/amd_nb.h +++ b/arch/x86/include/asm/amd_nb.h @@ -103,6 +103,9 @@ static inline u16 amd_pci_dev_to_node_id(struct pci_dev *pdev) static inline bool amd_gart_present(void) { + if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD) + return false; + /* GART present only on Fam15h, upto model 0fh */ if (boot_cpu_data.x86 == 0xf || boot_cpu_data.x86 == 0x10 || (boot_cpu_data.x86 == 0x15 && boot_cpu_data.x86_model < 0x10)) diff --git a/arch/x86/kernel/amd_nb.c b/arch/x86/kernel/amd_nb.c index b481b95..b51c6b1 100644 --- a/arch/x86/kernel/amd_nb.c +++ b/arch/x86/kernel/amd_nb.c @@ -264,6 +264,10 @@ bool __init early_is_amd_nb(u32 device) const struct pci_device_id *id; u32 vendor = device & 0xffff; + if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD && + boot_cpu_data.x86_vendor != X86_VENDOR_HYGON) + return false; + device >>= 16; for (id = amd_nb_misc_ids; id->vendor; id++) if (vendor == id->vendor && device == id->device) -- 2.7.4
