linux-kernel - 答复: 答复: 答复: 答复: [PATCH] iommu/vt-d: Don't reject nvme host due to scope mismatch

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Date:   Wed, 25 Dec 2019 01:52:40 +0000
From:   "Jim,Yan" <jimyan@...du.com>
To:     Lu Baolu <baolu.lu@...ux.intel.com>,
        Jerry Snitselaar <jsnitsel@...hat.com>
CC:     "iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: 答复: 答复: 答复: 答复: [PATCH] iommu/vt-d: Don't reject nvme host due to scope mismatch

Hi,

> -----邮件原件-----
> 发件人: Lu Baolu [mailto:baolu.lu@...ux.intel.com]
> 发送时间: 2019年12月24日 19:27
> 收件人: Jim,Yan <jimyan@...du.com>; Jerry Snitselaar <jsnitsel@...hat.com>
> 抄送: iommu@...ts.linux-foundation.org; linux-kernel@...r.kernel.org
> 主题: Re: 答复: 答复: 答复: [PATCH] iommu/vt-d: Don't reject nvme host due
> to scope mismatch
> 
> Hi,
> 
> On 2019/12/24 16:18, Jim,Yan wrote:
> >>>> For both cases, a quirk flag seems to be more reasonable, so that
> >>>> unrelated devices will not be impacted.
> >>>>
> >>>> Best regards,
> >>>> baolu
> >>> Hi Baolu,
> >>> 	Thanks for your advice. And I modify the patch as follow.
> >> I just posted a patch for both NTG and NVME cases. Can you please take a
> look?
> >> Does it work for you?
> >>
> >> Best regards,
> >> baolu
> >>
> > I have tested your patch. It does work for me. But I prefer my second version,
> it is more flexible, and may use for similar unknown devices.
> >
> 
> I didn't get your point. Do you mind explaining why it's more flexible?
> 
> Best regards,
> Baolu
For example, an unknown device has a normal PCI header and bridge scope and a class of PCI_CLASS_BRIDGE_PCI. 
These devices do have a class of PCI_BASE_CLASS_BRIDGE in common.

Jim