On Tue, Dec 19, 2023 at 05:26:21PM +0800, Yi Liu wrote:
> On 2023/12/17 19:21, Joel Granados wrote:
> > Hey Yi
> >
> > I have been working with
> > https://protect2.fireeye.com/v1/url?k=b58750ce-ea1c9eaa-b586db81-000babda0201-365207d33731a099&q=1&e=ee73b69d-5c35-49ef-9e62-2355fb797f21&u=https%3A%
On 2023/12/17 19:21, Joel Granados wrote:
Hey Yi
I have been working with
https://github.com/yiliu1765/qemu/tree/zhenzhong/wip/iommufd_nesting_rfcv1
good to know about it.
and have some questions regarding one of the commits in that series.
I however cannot find it in lore.kernel.org. Can y
Hey Yi
I have been working with
https://github.com/yiliu1765/qemu/tree/zhenzhong/wip/iommufd_nesting_rfcv1
and have some questions regarding one of the commits in that series.
I however cannot find it in lore.kernel.org. Can you please direct me to
where the rfc was posted? If it has not been pos
On Wed, Dec 13, 2023 at 08:40:55AM -0400, Jason Gunthorpe wrote:
> On Tue, Dec 12, 2023 at 12:05:41PM -0800, Nicolin Chen wrote:
> > > > // iommufd_private.h
> > > >
> > > > enum iommufd_object_type {
> > > > ...
> > > > + IOMMUFD_OBJ_VIOMMU,
> > > > ...
> > > > };
> > > >
>
On Tue, Dec 12, 2023 at 12:05:41PM -0800, Nicolin Chen wrote:
> > > // iommufd_private.h
> > >
> > > enum iommufd_object_type {
> > > ...
> > > + IOMMUFD_OBJ_VIOMMU,
> > > ...
> > > };
> > >
> > > +struct iommufd_viommu {
> > > + struct iommufd_object obj;
> > > + struct iommufd_hwpt_paging *
On Tue, Dec 12, 2023 at 03:21:00PM -0400, Jason Gunthorpe wrote:
> On Tue, Dec 12, 2023 at 11:13:37AM -0800, Nicolin Chen wrote:
> > On Tue, Dec 12, 2023 at 10:44:21AM -0400, Jason Gunthorpe wrote:
> > > On Mon, Dec 11, 2023 at 11:30:00PM -0800, Nicolin Chen wrote:
> > >
> > > > > > Could the stru
On Tue, Dec 12, 2023 at 11:13:37AM -0800, Nicolin Chen wrote:
> On Tue, Dec 12, 2023 at 10:44:21AM -0400, Jason Gunthorpe wrote:
> > On Mon, Dec 11, 2023 at 11:30:00PM -0800, Nicolin Chen wrote:
> >
> > > > > Could the structure just look like this?
> > > > > struct iommu_dev_assign_virtual_id {
>
On Tue, Dec 12, 2023 at 10:44:21AM -0400, Jason Gunthorpe wrote:
> On Mon, Dec 11, 2023 at 11:30:00PM -0800, Nicolin Chen wrote:
>
> > > > Could the structure just look like this?
> > > > struct iommu_dev_assign_virtual_id {
> > > >__u32 size;
> > > >__u32 dev_id;
> > > >__
On Mon, Dec 11, 2023 at 11:30:00PM -0800, Nicolin Chen wrote:
> > > Could the structure just look like this?
> > > struct iommu_dev_assign_virtual_id {
> > >__u32 size;
> > >__u32 dev_id;
> > >__u32 id_type;
> > >__u32 id;
> > > };
> >
> > It needs to take in the v
On Mon, Dec 11, 2023 at 05:57:38PM -0400, Jason Gunthorpe wrote:
> On Mon, Dec 11, 2023 at 01:27:49PM -0800, Nicolin Chen wrote:
> > On Fri, Dec 08, 2023 at 09:47:26PM -0400, Jason Gunthorpe wrote:
> > > What is in a Nested domain:
> > > ARM: A CD table pointer
> > > Nesting domains are crea
On Mon, Dec 11, 2023 at 01:27:49PM -0800, Nicolin Chen wrote:
> On Fri, Dec 08, 2023 at 09:47:26PM -0400, Jason Gunthorpe wrote:
> > What is in a Nested domain:
> > ARM: A CD table pointer
> > Nesting domains are created for every unique CD table top pointer.
>
> I think we basically implem
On Mon, Dec 11, 2023 at 12:11:25PM -0800, Nicolin Chen wrote:
> On Mon, Dec 11, 2023 at 09:20:41AM -0400, Jason Gunthorpe wrote:
> > On Mon, Dec 11, 2023 at 08:35:09PM +0800, Yi Liu wrote:
> > > > So.. In short.. Invalidation is a PITA. The idea is the same but
> > > > annoying little details inter
On Fri, Dec 08, 2023 at 09:47:26PM -0400, Jason Gunthorpe wrote:
> What is in a Nested domain:
> ARM: A CD table pointer
> Nesting domains are created for every unique CD table top pointer.
I think we basically implemented in a way of syncing STE, i,e,
vSTE.Config must be "S1 Translate" bes
On Mon, Dec 11, 2023 at 09:20:41AM -0400, Jason Gunthorpe wrote:
> On Mon, Dec 11, 2023 at 08:35:09PM +0800, Yi Liu wrote:
> > > So.. In short.. Invalidation is a PITA. The idea is the same but
> > > annoying little details interfere with actually having a compltely
> > > common API here. IMHO the
On Tue, Dec 12, 2023 at 12:35:26AM +0700, Suthikulpanit, Suravee wrote:
>
>
> On 12/9/2023 8:47 AM, Jason Gunthorpe wrote:
> > On Fri, Nov 17, 2023 at 05:07:11AM -0800, Yi Liu wrote:
> >
> > > Take Intel VT-d as an example, the stage-1 translation table is I/O page
> > > table. As the below diag
On 12/9/2023 8:47 AM, Jason Gunthorpe wrote:
On Fri, Nov 17, 2023 at 05:07:11AM -0800, Yi Liu wrote:
Take Intel VT-d as an example, the stage-1 translation table is I/O page
table. As the below diagram shows, guest I/O page table pointer in GPA
(guest physical address) is passed to host and
On Mon, Dec 11, 2023 at 10:34:09PM +0700, Suthikulpanit, Suravee wrote:
> Currently, the AMD IOMMU driver allocates a DomainId per IOMMU group.
> One issue with this is when we have nested translation where we could end up
> with multiple devices (RIDs) sharing same PASID and the same hDomainID.
On 12/11/2023 8:05 PM, Jason Gunthorpe wrote:
On Mon, Dec 11, 2023 at 08:36:46PM +0800, Yi Liu wrote:
On 2023/12/11 10:29, Tian, Kevin wrote:
From: Jason Gunthorpe
Sent: Saturday, December 9, 2023 9:47 AM
What is in a Nested domain:
Intel: A single IO page table refereed to by a PASID e
On Mon, Dec 11, 2023 at 08:35:09PM +0800, Yi Liu wrote:
> > What iommufd object should receive the IOTLB invalidation command list:
> > Intel: The Nesting domain. The command list has to be broken up per
> > (vDomain-ID,PASID) and that batch delivered to the single
> > nesting domai
On Mon, Dec 11, 2023 at 08:36:46PM +0800, Yi Liu wrote:
> On 2023/12/11 10:29, Tian, Kevin wrote:
> > > From: Jason Gunthorpe
> > > Sent: Saturday, December 9, 2023 9:47 AM
> > >
> > > What is in a Nested domain:
> > > Intel: A single IO page table refereed to by a PASID entry
> > > Ea
On 2023/12/11 10:29, Tian, Kevin wrote:
From: Jason Gunthorpe
Sent: Saturday, December 9, 2023 9:47 AM
What is in a Nested domain:
Intel: A single IO page table refereed to by a PASID entry
Each vDomain-ID,PASID allocates a unique nesting domain
AMD: A GCR3 table pointer
Nes
On 2023/12/9 09:47, Jason Gunthorpe wrote:
On Fri, Nov 17, 2023 at 05:07:11AM -0800, Yi Liu wrote:
Take Intel VT-d as an example, the stage-1 translation table is I/O page
table. As the below diagram shows, guest I/O page table pointer in GPA
(guest physical address) is passed to host and be us
> From: Jason Gunthorpe
> Sent: Saturday, December 9, 2023 9:47 AM
>
> What is in a Nested domain:
> Intel: A single IO page table refereed to by a PASID entry
> Each vDomain-ID,PASID allocates a unique nesting domain
> AMD: A GCR3 table pointer
> Nesting domains are created for e
On Fri, Nov 17, 2023 at 05:07:11AM -0800, Yi Liu wrote:
> Take Intel VT-d as an example, the stage-1 translation table is I/O page
> table. As the below diagram shows, guest I/O page table pointer in GPA
> (guest physical address) is passed to host and be used to perform the stage-1
> address tran
Nested translation is a hardware feature that is supported by many modern
IOMMU hardwares. It has two stages (stage-1, stage-2) address translation
to get access to the physical address. stage-1 translation table is owned
by userspace (e.g. by a guest OS), while stage-2 is owned by kernel. Changes
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