linux-kernel - Re: [PATCH v4 06/11] iommufd: Allow pt_id to carry viommu_id for IOMMU_HWPT

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Message-ID: <ZxvD/KEnzjTMOYnA@Asurada-Nvidia>
Date: Fri, 25 Oct 2024 09:14:52 -0700
From: Nicolin Chen <nicolinc@...dia.com>
To: "Tian, Kevin" <kevin.tian@...el.com>
CC: "jgg@...dia.com" <jgg@...dia.com>, "will@...nel.org" <will@...nel.org>,
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Subject: Re: [PATCH v4 06/11] iommufd: Allow pt_id to carry viommu_id for
 IOMMU_HWPT_ALLOC

On Fri, Oct 25, 2024 at 09:04:15AM +0000, Tian, Kevin wrote:
> > From: Nicolin Chen <nicolinc@...dia.com>
> > Sent: Tuesday, October 22, 2024 8:19 AM
> >
> > +static struct iommufd_hwpt_nested *
> > +iommufd_hwpt_nested_alloc_for_viommu(struct iommufd_viommu
> > *viommu,
> > +                                  const struct iommu_user_data *user_data)
> 
> probably "_for" can be skipped to reduce the name length

That would sound like a hwpt_nested allocating vIOMMU...

It'd be probably neutral to have iommufd_viommu_alloc_hwpt_nested,
yet we have iommufd_hwpt_nested_alloc (HWPT-based) to align with..

> looks there missed a check on flags in this path.

Oh yes, I missed that. Will pass in the cmd->flags.

Thanks
Nicolin