Re: [PATCH v5 5/9] iommufd: Add an ioctl to query PA from IOVA for noiommu mode

[Yi Liu]

On 5/20/26 15:20, Yi Liu wrote:

> > +struct iommu_ioas_noiommu_get_pa {
> > +    __u32 size;
> > +    __u32 flags;
> > +    __u32 ioas_id;
> > +    __u32 __reserved;
> > +    __aligned_u64 iova;
> > +    __aligned_u64 out_length;
> > +    __aligned_u64 out_phys;
> > +};
> > +#define IOMMU_IOAS_NOIOMMU_GET_PA _IO(IOMMUFD_TYPE, 
> > IOMMUFD_CMD_IOAS_NOIOMMU_GET_PA)
>
> can this work for normal vfio usage as well? e.g. vfio usages that open
> devices that have iommu procetction.
>
> My concern is kernel does not prevent normal vfio usage from invoking
> this ioctl. If it works for normal vfio usage as well, may just remove
> the noiommu term from thie name. If not, may be

failed to finish typing. I meant if this ioctl does not work for normal
vfio usage, mind pointing me where kernel fails it. :)