Re: [PATCH v1] iommu/amd: Recognize Hygon southbridge IOAPIC for interrupt remapping

[Pu Wen]

On 2026/3/25 17:39, Wei Wang wrote:
> Hygon systems use the AMD IOMMU driver but newer Hygon platforms report
> the southbridge IOAPIC at a different PCI device (00:0b.0), whereas AMD
> systems use device 00:14.0.
......
> +/* SB IOAPIC device IDs */
> +#define IOAPIC_SB_DEVID_AMD	((0x00 << 8) | PCI_DEVFN(0x14, 0))
> +#define IOAPIC_SB_DEVID_HYGON	((0x00 << 8) | PCI_DEVFN(0x0b, 0))
These macro definitions is not accurate, old Hygon processor also use
device 0x14, as you mentioned device 0xb is only for 'newer Hygon 
platforms'.

--
Regards,
Pu Wen