From: Vasant Hegde <vasant.hegde@amd.com>
To: Yu Zhang <zhangyu1@linux.microsoft.com>,
linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org,
iommu@lists.linux.dev, linux-pci@vger.kernel.org,
linux-arch@vger.kernel.org, x86@kernel.org
Cc: wei.liu@kernel.org, kys@microsoft.com, haiyangz@microsoft.com,
decui@microsoft.com, joro@8bytes.org, will@kernel.org,
robin.murphy@arm.com, bhelgaas@google.com,
kwilczynski@kernel.org, lpieralisi@kernel.org, mani@kernel.org,
robh@kernel.org, arnd@arndb.de, jgg@ziepe.ca,
mhklinux@outlook.com, jacob.pan@linux.microsoft.com,
tgopinath@linux.microsoft.com,
easwar.hariharan@linux.microsoft.com,
mrathor@linux.microsoft.com, baolu.lu@linux.intel.com,
suravee.suthikulpanit@amd.com
Subject: Re: [PATCH v6 3/5] iommu/x86: Add architectural MSI reserved region helper
Date: Thu, 1 Oct 2026 17:37:18 +0530 [thread overview]
Message-ID: <9b5088ad-da0c-4d25-bf9e-1c7ff657bf8e@amd.com> (raw)
In-Reply-To: <20260930141409.437904-4-zhangyu1@linux.microsoft.com>
On 9/30/2026 7:44 PM, Yu Zhang wrote:
> Intel and AMD IOMMU drivers both reserve the x86 architectural MSI
> address window from normal IOVA mappings, but each open-codes the range,
> allocation attributes, and insertion into the reserved-region list.
>
> Add iommu_add_resv_x86_msi_region() to encapsulate those operations, and
> convert the Intel and AMD drivers to use it. Return an error on allocation
> failure so callers can preserve their existing error paths.
>
> Signed-off-by: Yu Zhang <zhangyu1@linux.microsoft.com>
> Reviewed-by: Michael Kelley <mhklinux@outlook.com>
> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Vasant Hegde <vasant.hegde@amd.com>
-Vasant
next prev parent reply other threads:[~2026-10-01 12:07 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-30 14:14 [PATCH v6 0/5] Hyper-V: Add para-virtualized IOMMU support for Linux guests Yu Zhang
2026-09-30 14:14 ` [PATCH v6 1/5] hyperv: Introduce new hypercall interfaces used by Hyper-V guest IOMMU Yu Zhang
2026-09-30 14:14 ` [PATCH v6 2/5] Drivers: hv: Add logical device ID registry for vPCI devices Yu Zhang
2026-09-30 14:14 ` [PATCH v6 3/5] iommu/x86: Add architectural MSI reserved region helper Yu Zhang
2026-10-01 12:07 ` Vasant Hegde [this message]
2026-09-30 14:14 ` [PATCH v6 4/5] iommu/hyperv: Add para-virtualized IOMMU support for Hyper-V guest Yu Zhang
2026-09-30 14:14 ` [PATCH v6 5/5] iommu/hyperv: Add page-selective IOTLB flush support Yu Zhang
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