linux-kernel - Re: [PATCH v5 2/5] iommu: Tiny domain for iommu_setup_dma

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Message-ID: <f6e4ca74-2b76-4662-97eb-a1c5eab62c9a@linux.intel.com>
Date: Wed, 12 Nov 2025 13:22:38 +0800
From: Baolu Lu <baolu.lu@...ux.intel.com>
To: Nicolin Chen <nicolinc@...dia.com>, joro@...tes.org, afael@...nel.org,
 bhelgaas@...gle.com, alex@...zbot.org, jgg@...dia.com, kevin.tian@...el.com
Cc: will@...nel.org, robin.murphy@....com, lenb@...nel.org,
 linux-arm-kernel@...ts.infradead.org, iommu@...ts.linux.dev,
 linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
 linux-pci@...r.kernel.org, kvm@...r.kernel.org, patches@...ts.linux.dev,
 pjaroszynski@...dia.com, vsethi@...dia.com, helgaas@...nel.org,
 etzhao1900@...il.com
Subject: Re: [PATCH v5 2/5] iommu: Tiny domain for iommu_setup_dma_ops()

On 11/11/25 13:12, Nicolin Chen wrote:
> This function can only be called on the default_domain. Trivally pass it
> in. In all three existing cases, the default domain was just attached to
> the device.
> 
> This avoids iommu_setup_dma_ops() calling iommu_get_domain_for_dev() the
> that will be used by external callers.
> 
> Suggested-by: Jason Gunthorpe<jgg@...dia.com>
> Signed-off-by: Nicolin Chen<nicolinc@...dia.com>
> ---
>   drivers/iommu/dma-iommu.h | 5 +++--
>   drivers/iommu/dma-iommu.c | 4 +---
>   drivers/iommu/iommu.c     | 6 +++---
>   3 files changed, 7 insertions(+), 8 deletions(-)

Reviewed-by: Lu Baolu <baolu.lu@...ux.intel.com>