[PATCH v2 09/22] iommufd/viommu: Introduce IOMMUFD_OBJ_VCMDQ and its related struct

Nicolin Chen nicolinc at nvidia.com
Mon May 5 08:45:14 PDT 2025


On Mon, May 05, 2025 at 12:02:14PM -0300, Jason Gunthorpe wrote:
> On Mon, Apr 28, 2025 at 11:10:40AM -0700, Nicolin Chen wrote:
> > > > +struct iommufd_vcmdq {
> > > > +	struct iommufd_object obj;
> > > > +	struct iommufd_ctx *ictx;
> > > > +	struct iommufd_viommu *viommu;
> > > > +	dma_addr_t addr;
> > > 
> > > It's better to add a comment to state that @addr is a guest physical
> > > address. Or not?
> > 
> > Yea. Let's add one:
> > 
> > 	dma_addr_t addr; /* in guest physical address space */
> 
> If it is a guest physical in a nested page table it should technically
> be u64 not dma_addr_t

OK. Will change that in v4.

Thanks
Nicolin



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