Re: [PATCH v3 3/5] iommu/x86: Share the architectural MSI reserved range
From: Jason Gunthorpe <jgg@ziepe.ca>
Date: 2026-08-12 12:30:37
Also in:
linux-arch, linux-iommu, linux-pci, lkml
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