Add a flush_iotlb_range to allow flushing of an iova range instead of a
full flush in the dma-iommu path.
Allow the iommu_unmap_fast to return newly freed page table pages and
pass the freelist to queue_iova in the dma-iommu ops path.
This patch is useful for iommu drivers (in this case the intel
init_iova_flush_queue can fail if we run out of memory. Fall back to no
flush queue if it fails.
Signed-off-by: Tom Murphy
---
drivers/iommu/dma-iommu.c | 8 +---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 7433f74
On Sun, 16 Aug 2020 14:40:57 +0200
Auger Eric wrote:
> Hi Yi,
>
> On 8/14/20 9:15 AM, Liu, Yi L wrote:
> > Hi Eric,
> >
> >> From: Auger Eric
> >> Sent: Thursday, August 13, 2020 8:53 PM
> >>
> >> Yi,
> >> On 7/28/20 8:27 AM, Liu Yi L wrote:
> >>> IOMMUs that support nesting translation ne
After acpi device in RMRR is detected,it is necessary
to establish a mapping for these devices.
In acpi_device_create_direct_mappings(),create a mapping
for the acpi device in RMRR.
Add a helper to achieve the acpi namespace device can
access the RMRR region.
Signed-off-by: FelixCuioc
---
driver
Some ACPI devices need to issue dma requests to access
the reserved memory area.BIOS uses the device scope type
ACPI_NAMESPACE_DEVICE in RMRR to report these ACPI devices.
This patch add support for detecting ACPI devices in RMRR.
Signed-off-by: FelixCuioc
---
drivers/iommu/intel/dmar.c | 74 ++
Hi Tom,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on tegra/for-next]
[also build test ERROR on vfio/next v5.9-rc1 next-20200817]
[cannot apply to iommu/next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we
On 2020/7/2 16:22, Hanjun Guo wrote:
As I said in previous email, I'm not against this patch, and seems
have no regressions for platforms that using named component node
such as D05/D06 (I will test it shortly to make sure), but it's better
to update the wording of the spec (even after this patc
On Thu, 13 Aug 2020 10:58:53 +0200
Auger Eric wrote:
> Hi Jacob,
>
> On 7/30/20 2:21 AM, Jacob Pan wrote:
> > User APIs such as iommu_sva_unbind_gpasid() may also be used by the
> > kernel. Since we introduced user pointer to the UAPI functions,
> Practically this is done in the next patch. Wh
Hello Bjorn,
On Sat, Aug 1, 2020 at 5:30 PM Rajat Jain wrote:
>
> Hi Bjorn,
>
>
> On Tue, Jul 14, 2020 at 1:24 PM Rajat Jain wrote:
> >
> > On Tue, Jul 14, 2020 at 1:15 PM Rajat Jain wrote:
> > >
> > > The ACS "Translation Blocking" bit blocks the translated addresses from
> > > the devices. W
On Wed, 12 Aug 2020 18:59:14 +0200
Auger Eric wrote:
> Hi,
>
> On 7/30/20 2:21 AM, Jacob Pan wrote:
> > As IOMMU UAPI gets extended, user data size may increase. To support
> > backward compatibiliy, this patch introduces a size field to each
> > UAPI
> s/compatibiliy/compatibility
will fix
>
From: Rob Clark
In $debugfs/gem we already show any vma(s) associated with an object.
Also show process names if the vma's address space is a per-process
address space.
Signed-off-by: Rob Clark
---
drivers/gpu/drm/msm/msm_drv.c | 2 +-
drivers/gpu/drm/msm/msm_gem.c | 25 ++
From: Rob Clark
For the Adreno GPU's SMMU, we want SCTLR.HUPCF set to ensure that
pending translations are not terminated on iova fault. Otherwise
a terminated CP read could hang the GPU by returning invalid
command-stream data.
Signed-off-by: Rob Clark
---
drivers/iommu/arm/arm-smmu/arm-smmu
From: Jordan Crouse
Add support to create a io-pgtable for use by targets that support
per-instance pagetables. In order to support per-instance pagetables the
GPU SMMU device needs to have the qcom,adreno-smmu compatible string and
split pagetables enabled.
Signed-off-by: Jordan Crouse
Signed-
From: Rob Clark
Set the qcom,adreno-smmu compatible string for the GPU SMMU to enable
split pagetables and per-instance pagetables for drm/msm.
Signed-off-by: Rob Clark
---
arch/arm64/boot/dts/qcom/sc7180.dtsi | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/boot/
From: Jordan Crouse
Set the qcom,adreno-smmu compatible string for the GPU SMMU to enable
split pagetables and per-instance pagetables for drm/msm.
Signed-off-by: Jordan Crouse
Signed-off-by: Rob Clark
---
arch/arm64/boot/dts/qcom/sdm845.dtsi | 2 +-
1 file changed, 1 insertion(+), 1 deletion
From: Jordan Crouse
Add support for using per-instance pagetables if all the dependencies are
available.
Signed-off-by: Jordan Crouse
Signed-off-by: Rob Clark
---
drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 63 +++
drivers/gpu/drm/msm/adreno/a6xx_gpu.h | 1 +
drivers/gpu/
From: Jordan Crouse
Add support for allocating private address space instances. Targets that
support per-context pagetables should implement their own function to
allocate private address spaces.
The default will return a pointer to the global address space.
Signed-off-by: Jordan Crouse
Signed
From: Rob Clark
This will be populated by adreno-smmu, to provide a way for coordinating
enabling/disabling TTBR0 translation.
Signed-off-by: Rob Clark
---
drivers/gpu/drm/msm/adreno/adreno_device.c | 2 --
drivers/gpu/drm/msm/msm_gpu.c | 2 +-
drivers/gpu/drm/msm/msm_gpu.h
From: Jordan Crouse
Each submitqueue is attached to a context. Add a pointer to the
context to the submitqueue at create time and refcount it so
that it stays around through the life of the queue.
Co-developed-by: Rob Clark
Signed-off-by: Jordan Crouse
Signed-off-by: Rob Clark
---
drivers/gp
From: Rob Clark
Sprinkle a few `const`s where helpers don't need write access.
Signed-off-by: Rob Clark
---
drivers/iommu/arm/arm-smmu/arm-smmu.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.h
b/drivers/iommu/arm/arm-smmu/arm-sm
From: Jordan Crouse
Add a special implementation for the SMMU attached to most Adreno GPU
target triggered from the qcom,adreno-smmu compatible string.
The new Adreno SMMU implementation will enable split pagetables
(TTBR1) for the domain attached to the GPU device (SID 0) and
hard code it conte
From: Jordan Crouse
Now that we can get the ctx from the submitqueue, the extra arg is
redundant.
Signed-off-by: Jordan Crouse
[split out of previous patch to reduce churny noise]
Signed-off-by: Rob Clark
---
drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 12 +---
drivers/gpu/drm/msm/adren
From: Jordan Crouse
Every Qcom Adreno GPU has an embedded SMMU for its own use. These
devices depend on unique features such as split pagetables,
different stall/halt requirements and other settings. Identify them
with a compatible string so that they can be identified in the
arm-smmu implementat
From: Jordan Crouse
Use the aperture settings from the IOMMU domain to set up the virtual
address range for the GPU. This allows us to transparently deal with
IOMMU side features (like split pagetables).
Signed-off-by: Jordan Crouse
Signed-off-by: Rob Clark
---
drivers/gpu/drm/msm/adreno/adre
From: Rob Clark
This interface will be used for drm/msm to coordinate with the
qcom_adreno_smmu_impl to enable/disable TTBR0 translation.
Once TTBR0 translation is enabled, the GPU's CP (Command Processor)
will directly switch TTBR0 pgtables (and do the necessary TLB inv)
synchronized to the GPU
From: Rob Clark
In a later patch, the drvdata will not directly be 'struct msm_gpu *',
so add a helper to reduce the churn.
Signed-off-by: Rob Clark
---
drivers/gpu/drm/msm/adreno/adreno_device.c | 10 --
drivers/gpu/drm/msm/msm_gpu.c | 6 +++---
drivers/gpu/drm/msm/msm_g
From: Rob Clark
Currently it doesn't matter, since we free the ctx immediately. But
when we start refcnt'ing the ctx, we don't want old dangling list
entries to hang around.
Signed-off-by: Rob Clark
---
drivers/gpu/drm/msm/msm_submitqueue.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletio
From: Jordan Crouse
Do a bit of prep work to add the upcoming adreno-smmu implementation.
Add an hook to allow the implementation to choose which context banks
to allocate.
Move some of the common structs to arm-smmu.h in anticipation of them
being used by the implementations and update some of
From: Jordan Crouse
Construct the io-pgtable config before calling the implementation specific
init_context function and pass it so the implementation specific function
can get a chance to change it before the io-pgtable is created.
Signed-off-by: Jordan Crouse
Signed-off-by: Rob Clark
---
dr
From: Jordan Crouse
Enable TTBR1 for a context bank if IO_PGTABLE_QUIRK_ARM_TTBR1 is selected
by the io-pgtable configuration.
Signed-off-by: Jordan Crouse
Signed-off-by: Rob Clark
---
drivers/iommu/arm/arm-smmu/arm-smmu.c | 21 -
drivers/iommu/arm/arm-smmu/arm-smmu.h | 25
From: Rob Clark
This series adds an Adreno SMMU implementation to arm-smmu to allow GPU hardware
pagetable switching.
The Adreno GPU has built in capabilities to switch the TTBR0 pagetable during
runtime to allow each individual instance or application to have its own
pagetable. In order to tak
On Wed, 12 Aug 2020 18:38:50 +0200
Auger Eric wrote:
> Hi Jacob,
>
> On 7/30/20 2:21 AM, Jacob Pan wrote:
> > IOMMU UAPI is newly introduced to support communications between
> > guest virtual IOMMU and host IOMMU. There has been lots of
> > discussions on how it should work with VFIO UAPI and u
The new field 'dma_range_map' in struct device is used to facilitate the
use of single or multiple offsets between mapping regions of cpu addrs and
dma addrs. It subsumes the role of "dev->dma_pfn_offset" which was only
capable of holding a single uniform offset and had no region bounds
checking.
Patchset Summary:
Enhance a PCIe host controller driver. Because of its unusual design
we are foced to change dev->dma_pfn_offset into a more general role
allowing multiple offsets. See the 'v1' notes below for more info.
v10:
Commit: "device-mapping: Introduce DMA range map, supplantin
Hello Christoph,
Christoph Hellwig writes:
> On Sat, Aug 15, 2020 at 05:45:36PM -0300, Thiago Jung Bauermann wrote:
>> POWER secure guests (i.e., guests which use the Protection Execution
>> Facility) need to use SWIOTLB to be able to do I/O with the hypervisor, but
>> they don't need the SWIO
POWER secure guests (i.e., guests which use the Protection Execution
Facility) need to use SWIOTLB to be able to do I/O with the hypervisor, but
they don't need the SWIOTLB memory to be in low addresses since the
hypervisor doesn't have any addressing limitation.
This solves a SWIOTLB initializati
init_iova_flush_queue can fail if we run out of memory. Fall back to no
flush queue if it fails.
Signed-off-by: Tom Murphy
---
drivers/iommu/dma-iommu.c | 8 +---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 7433f74
To keep naming consistent we should stick with *iotlb*. This patch
renames a few remaining functions.
Signed-off-by: Tom Murphy
---
drivers/iommu/dma-iommu.c | 2 +-
drivers/iommu/iommu.c | 4 ++--
drivers/vfio/vfio_iommu_type1.c | 2 +-
include/linux/io-pgtable.h | 2 +-
Add a flush_iotlb_range to allow flushing of an iova range instead of a
full flush in the dma-iommu path.
Allow the iommu_unmap_fast to return newly freed page table pages and
pass the freelist to queue_iova in the dma-iommu ops path.
This patch is useful for iommu drivers (in this case the intel
Aggregate all sanity-checks for sharing CPU page tables with the SMMU
under a single ARM_SMMU_FEAT_SVA bit. For PCIe SVA, users also need to
check FEAT_ATS and FEAT_PRI. For platform SVA, they will have to check
FEAT_STALLS.
Introduce ARM_SMMU_FEAT_BTM (Broadcast TLB Maintenance), but don't
enable
Allow sharing structure definitions with the upcoming SVA support for
Arm SMMUv3, by moving them to a separate header. We could surgically
extract only what is needed but keeping all definitions in one place
looks nicer.
Signed-off-by: Jean-Philippe Brucker
---
drivers/iommu/arm/arm-smmu-v3/arm-
Implement the IOMMU device feature callbacks to support the SVA feature.
At the moment dev_has_feat() returns false since I/O Page Faults isn't
yet implemented.
Signed-off-by: Jean-Philippe Brucker
---
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 26 ++
.../iommu/arm/arm-smmu-v3/arm-smmu-
The SMMU has a single ASID space, the union of shared and private ASID
sets. This means that the SMMU driver competes with the arch allocator
for ASIDs. Shared ASIDs are those of Linux processes, allocated by the
arch, and contribute in broadcast TLB maintenance. Private ASIDs are
allocated by the
The sva_bind() function allows devices to access process address spaces
using a PASID (aka SSID).
(1) bind() allocates or gets an existing MMU notifier tied to the
(domain, mm) pair. Each mm gets one PASID.
(2) Any change to the address space calls invalidate_range() which sends
ATC inval
The invalidate_range() notifier is called for any change to the address
space. Perform the required ATC invalidations.
Signed-off-by: Jean-Philippe Brucker
---
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h| 2 ++
.../iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c| 16 +++-
drivers/io
With Shared Virtual Addressing (SVA), we need to mirror CPU TTBR, TCR,
MAIR and ASIDs in SMMU contexts. Each SMMU has a single ASID space split
into two sets, shared and private. Shared ASIDs correspond to those
obtained from the arch ASID allocator, and private ASIDs are used for
"classic" map/unm
Extract some of the most generic TCR defines, so they can be reused by
the page table sharing code.
Acked-by: Will Deacon
Signed-off-by: Jean-Philippe Brucker
---
drivers/iommu/io-pgtable-arm.h | 30 ++
drivers/iommu/io-pgtable-arm.c | 27 ++-
The SMMUv3 driver would like to read the MMFR0 PARANGE field in order to
share CPU page tables with devices. Allow the driver to be built as
module by exporting the read_sanitized_ftr_reg() cpufeature symbol.
Acked-by: Suzuki K Poulose
Signed-off-by: Jean-Philippe Brucker
---
arch/arm64/kernel/
Let IOMMU drivers allocate a single PASID per mm. Store the mm in the
IOASID set to allow refcounting and searching mm by PASID, when handling
an I/O page fault.
Reviewed-by: Lu Baolu
Signed-off-by: Jean-Philippe Brucker
---
drivers/iommu/Kconfig | 5 +++
drivers/iommu/Makefile
To enable address space sharing with the IOMMU, introduce
arm64_mm_context_get() and arm64_mm_context_put(), that pin down a
context and ensure that it will keep its ASID after a rollover. Export
the symbols to let the modular SMMUv3 driver use them.
Pinning is necessary because a device constantl
This is version 9 of the page table sharing support for SMMUv3, rebased
onto v5.9-rc1.
v9 resend:
* Rebased onto v5.9-rc1. Moved to drivers/iommu/arm/arm-smmu-v3/ as a
result.
v9:
https://lore.kernel.org/linux-iommu/20200723145724.3014766-1-jean-phili...@linaro.org/
* Moved most of the SVA cod
Let IOASID users take references to existing ioasids with ioasid_get().
ioasid_put() drops a reference and only frees the ioasid when its
reference number is zero. It returns true if the ioasid was freed.
For drivers that don't call ioasid_get(), ioasid_put() is the same as
ioasid_free().
Reviewed
From: Fenghua Yu
PASID is shared by all threads in a process. So the logical place to keep
track of it is in the "mm". Both ARM and X86 need to use the PASID in the
"mm".
Suggested-by: Christoph Hellwig
Signed-off-by: Fenghua Yu
Reviewed-by: Tony Luck
---
https://lore.kernel.org/linux-iommu/1
On Thu, Aug 13, 2020 at 07:41:14PM -0700, Rob Clark wrote:
> From: Rob Clark
>
> In $debugfs/gem we already show any vma(s) associated with an object.
> Also show process names if the vma's address space is a per-process
> address space.
Reviewed-by: Jordan Crouse
> Signed-off-by: Rob Clark
>
On Thu, Aug 13, 2020 at 07:41:02PM -0700, Rob Clark wrote:
> From: Rob Clark
>
> This will be populated by adreno-smmu, to provide a way for coordinating
> enabling/disabling TTBR0 translation.
>
Reviewed-by: Jordan Crouse
> Signed-off-by: Rob Clark
> ---
> drivers/gpu/drm/msm/adreno/adreno
On Thu, Aug 13, 2020 at 07:41:00PM -0700, Rob Clark wrote:
> From: Rob Clark
>
> This interface will be used for drm/msm to coordinate with the
> qcom_adreno_smmu_impl to enable/disable TTBR0 translation.
>
> Once TTBR0 translation is enabled, the GPU's CP (Command Processor)
> will directly swi
On Thu, Aug 13, 2020 at 07:41:01PM -0700, Rob Clark wrote:
> From: Rob Clark
>
> In a later patch, the drvdata will not directly be 'struct msm_gpu *',
> so add a helper to reduce the churn.
>
Reviewed-by: Jordan Crouse
> Signed-off-by: Rob Clark
> ---
> drivers/gpu/drm/msm/adreno/adreno_dev
On Thu, Aug 13, 2020 at 07:40:56PM -0700, Rob Clark wrote:
> From: Rob Clark
>
> Currently it doesn't matter, since we free the ctx immediately. But
> when we start refcnt'ing the ctx, we don't want old dangling list
> entries to hang around.
Reviewed-by: Jordan Crouse
> Signed-off-by: Rob Cl
On Thu, Aug 13, 2020 at 07:40:55PM -0700, Rob Clark wrote:
> From: Rob Clark
>
> NOTE: Since Jordan was out today, and I wanted to keep things moving on
> this, I took the liberty of respinning his series (originally
> titled "iommu/arm-smmu: Add Adreno SMMU specific implementation")
On Mon, Aug 17, 2020 at 09:10:46PM +0530, Akhil P Oommen wrote:
> On 8/14/2020 8:11 AM, Rob Clark wrote:
> >From: Jordan Crouse
> >
> >Add support for using per-instance pagetables if all the dependencies are
> >available.
> >
> >Signed-off-by: Jordan Crouse
> >Signed-off-by: Rob Clark
> >---
>
On 8/14/2020 8:11 AM, Rob Clark wrote:
From: Jordan Crouse
Add support for using per-instance pagetables if all the dependencies are
available.
Signed-off-by: Jordan Crouse
Signed-off-by: Rob Clark
---
drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 70 +++
drivers/gpu/drm
On Mon, Aug 17, 2020 at 8:41 AM Akhil P Oommen wrote:
>
> On 8/14/2020 8:11 AM, Rob Clark wrote:
> > From: Jordan Crouse
> >
> > Add support for using per-instance pagetables if all the dependencies are
> > available.
> >
> > Signed-off-by: Jordan Crouse
> > Signed-off-by: Rob Clark
> > ---
> >
On Mon, Aug 17, 2020 at 12:53:45PM +0200, Greg Kroah-Hartman wrote:
> You can always do this just fine, as one single patch. You do know
> about the co-developed-by: line, right?
Agreed. Please keep the main iommu driver in one patch and use
co-developed-by. This makes it easier for me to review
On Mon, Aug 17, 2020 at 12:46:17PM +0200, Mauro Carvalho Chehab wrote:
> The main reason of submitting via staging is that I need to preserve
> the patch that added this driver as-is, in order to preserve its
> SoB and not causing legal issues.
>
> It it is OK for iommu to accept a submission like
Em Mon, 17 Aug 2020 11:37:03 +0200
Greg Kroah-Hartman escreveu:
> On Mon, Aug 17, 2020 at 11:27:25AM +0200, Mauro Carvalho Chehab wrote:
> > Hi Christoph,
> >
> > Em Mon, 17 Aug 2020 09:21:06 +0100
> > Christoph Hellwig escreveu:
> >
> > > On Mon, Aug 17, 2020 at 09:49:59AM +0200, Mauro Carv
On Sat, Aug 15, 2020 at 05:45:36PM -0300, Thiago Jung Bauermann wrote:
> POWER secure guests (i.e., guests which use the Protection Execution
> Facility) need to use SWIOTLB to be able to do I/O with the hypervisor, but
> they don't need the SWIOTLB memory to be in low addresses since the
> hypervi
On Mon, Aug 17, 2020 at 11:27:25AM +0200, Mauro Carvalho Chehab wrote:
> Hi Christoph,
>
> Em Mon, 17 Aug 2020 09:21:06 +0100
> Christoph Hellwig escreveu:
>
> > On Mon, Aug 17, 2020 at 09:49:59AM +0200, Mauro Carvalho Chehab wrote:
> > > Add a driver for the Kirin 960/970 iommu.
> > >
> > > As
On Mon, Aug 17, 2020 at 11:27:25AM +0200, Mauro Carvalho Chehab wrote:
> I need to start from the original patch in order to preserve its
> authorship.
Nom you don't. We have plenty of example where people submit code
written by other, especially when it is significantly reworked,
> My plan is t
Hi Christoph,
Em Mon, 17 Aug 2020 09:21:06 +0100
Christoph Hellwig escreveu:
> On Mon, Aug 17, 2020 at 09:49:59AM +0200, Mauro Carvalho Chehab wrote:
> > Add a driver for the Kirin 960/970 iommu.
> >
> > As on the past series, this starts from the original 4.9 driver from
> > the 96boards tree:
On Mon, Aug 17, 2020 at 09:49:59AM +0200, Mauro Carvalho Chehab wrote:
> Add a driver for the Kirin 960/970 iommu.
>
> As on the past series, this starts from the original 4.9 driver from
> the 96boards tree:
>
> https://github.com/96boards-hikey/linux/tree/hikey970-v4.9
>
> The remaining
Hi Yi,
On 8/17/20 9:00 AM, Liu, Yi L wrote:
> Hi Eric,
>
>> From: Auger Eric
>> Sent: Sunday, August 16, 2020 7:52 PM
>>
>> Hi Yi,
>>
>> On 7/28/20 8:27 AM, Liu Yi L wrote:
>>> From: Eric Auger
>>>
>>> The VFIO API was enhanced to support nested stage control: a bunch of> new
>> ioctls and usag
Describe the properties expected by the IOMMU driver used on
Hikey960 and Hikey970 boards.
Signed-off-by: Mauro Carvalho Chehab
---
.../iommu/hisilicon,kirin36x0-smmu.yaml | 55 +++
1 file changed, 55 insertions(+)
create mode 100644
Documentation/devicetree/bindings/iomm
Add a driver for the Kirin 960/970 iommu.
As on the past series, this starts from the original 4.9 driver from
the 96boards tree:
https://github.com/96boards-hikey/linux/tree/hikey970-v4.9
The remaining patches add SPDX headers and make it build and run with
the upstream Kernel.
Chenfen
Eric,
> From: Auger Eric
> Sent: Monday, August 17, 2020 3:43 PM
>
> On 8/17/20 9:05 AM, Liu, Yi L wrote:
> > Hi Eric,
> >
> >> Auger Eric
> >> Sent: Sunday, August 16, 2020 8:01 PM
> >>
> >> Hi Yi,
> >>
> >> On 7/28/20 8:27 AM, Liu Yi L wrote:
> >>> This patch reports nesting info, and only su
Hi Eric,
> From: Eric Auger
> Sent: Monday, August 17, 2020 3:41 PM
>
> Hi Yi,
>
> On 8/17/20 9:00 AM, Liu, Yi L wrote:
> > Hi Eric,
> >
> >> From: Auger Eric
> >> Sent: Sunday, August 16, 2020 7:52 PM
> >>
> >> Hi Yi,
> >>
> >> On 7/28/20 8:27 AM, Liu Yi L wrote:
> >>> From: Eric Auger
> >>>
On 8/17/20 9:05 AM, Liu, Yi L wrote:
> Hi Eric,
>
>> Auger Eric
>> Sent: Sunday, August 16, 2020 8:01 PM
>>
>> Hi Yi,
>>
>> On 7/28/20 8:27 AM, Liu Yi L wrote:
>>> This patch reports nesting info, and only supports the case where all
>>> the physical iomms have the same CAP/ECAP MASKS.
>> s/io
Hi Eric,
> Auger Eric
> Sent: Sunday, August 16, 2020 8:01 PM
>
> Hi Yi,
>
> On 7/28/20 8:27 AM, Liu Yi L wrote:
> > This patch reports nesting info, and only supports the case where all
> > the physical iomms have the same CAP/ECAP MASKS.
> s/iomms/iommus
yep.
> >
> > Cc: Kevin Tian
> > CC:
Hi Eric,
> From: Auger Eric
> Sent: Sunday, August 16, 2020 7:52 PM
>
> Hi Yi,
>
> On 7/28/20 8:27 AM, Liu Yi L wrote:
> > From: Eric Auger
> >
> > The VFIO API was enhanced to support nested stage control: a bunch of> new
> ioctls and usage guideline.
> >
> > Let's document the process to fol
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