linux-kernel - Re: [PATCH 00/12] iommu: Remove IOMMU_DEV_FEAT_SVA/

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Message-ID: <CABQgh9FMy7oVt9+enSpJxXvkux+czMFqbsPZVgmBV+rFWWvhGA@mail.gmail.com>
Date: Fri, 14 Feb 2025 16:43:12 +0800
From: Zhangfei Gao <zhangfei.gao@...aro.org>
To: Lu Baolu <baolu.lu@...ux.intel.com>
Cc: Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>, 
	Robin Murphy <robin.murphy@....com>, Jason Gunthorpe <jgg@...pe.ca>, Kevin Tian <kevin.tian@...el.com>, 
	Fenghua Yu <fenghua.yu@...el.com>, Dave Jiang <dave.jiang@...el.com>, 
	Vinod Koul <vkoul@...nel.org>, Zhou Wang <wangzhou1@...ilicon.com>, iommu@...ts.linux.dev, 
	linux-kernel@...r.kernel.org, Jason Gunthorpe <jgg@...dia.com>, 
	Shameerali Kolothum Thodi <shameerali.kolothum.thodi@...wei.com>
Subject: Re: [PATCH 00/12] iommu: Remove IOMMU_DEV_FEAT_SVA/_IOPF

Hi, Baolu

On Fri, 14 Feb 2025 at 14:11, Lu Baolu <baolu.lu@...ux.intel.com> wrote:
>
> The new method for driver fault reporting support relies on the domain
> to specify a iopf_handler. The driver should detect this and setup the
> HW when fault capable domains are attached.
>
> Move SMMUv3 to use this method and have VT-D validate support during
> attach so that all three fault capable drivers have a no-op FEAT_SVA and
> _IOPF. Then remove them.
>
> This was initiated by Jason. I'm following up to remove FEAT_IOPF and
> further clean up.
>
> The whole series is also available at github:
> https://github.com/LuBaolu/intel-iommu/commits/iommu_no_feat-v1

I quickly test this branch

1. host test is OK

2. qemu boot one device, test ok,
though reports this when guest bootup.
vfio-pci xxx: resetting
vfio-pci xxx: reset done

3. qemu boot multi device,  test fails, host kernel reports [Hardware Error]
qemu can boot no problem
Test fails.

Will do more check without these patches.

Thanks