Re: [PATCH v3 3/5] iommu/x86: Share the architectural MSI reserved range

[Jason Gunthorpe]

On Wed, Aug 12, 2026 at 04:58:28PM +0800, Yu Zhang wrote:
> Thank you, Jason!
> Do you mean something like below?
> 
> -#define X86_IOMMU_MSI_RANGE_START        0xfee00000
> -#define X86_IOMMU_MSI_RANGE_END          0xfeefffff
> +static inline struct iommu_resv_region *
> +iommu_alloc_resv_x86_msi_region(void)
> +{
> +       return iommu_alloc_resv_region(0xfee00000, SZ_1M, 0,
> +                                      IOMMU_RESV_MSI, GFP_KERNEL);
> +}

Yeah something like that.

Jason