Re: [PATCH v3 3/5] iommu/x86: Share the architectural MSI reserved range
Jason Gunthorpe <[email protected]>
| Newsgroups | org.kernel.vger.linux-arch,dev.linux.lists.iommu,org.kernel.vger.linux-hyperv,org.kernel.vger.linux-kernel,org.kernel.vger.linux-pci |
|---|---|
| Message-ID | <[email protected]> |
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