Hi Jason,
> From: Jason Wang
> Sent: Thursday, October 22, 2020 10:56 AM
>
[...]
> If you(Intel) don't have plan to do vDPA, you should not prevent other vendors
> from implementing PASID capable hardware through non-VFIO subsystem/uAPI
> on top of your SIOV architecture. Isn't it?
yes, that's
> From: Jason Gunthorpe
> Sent: Tuesday, October 20, 2020 10:02 PM
[...]
> > > Whoever provides the vIOMMU emulation and relays the page fault to the
> guest
> > > has to translate the RID -
> >
> > that's the point. But the device info (especially the sub-device info) is
> > within the passthru f
> From: Jason Gunthorpe
> Sent: Tuesday, October 20, 2020 10:05 PM
> To: Liu, Yi L
>
> On Tue, Oct 20, 2020 at 02:00:31PM +, Liu, Yi L wrote:
> > > From: Jason Gunthorpe
> > > Sent: Tuesday, October 20, 2020 9:55 PM
> > >
> > > On Tue
> From: Jason Gunthorpe
> Sent: Tuesday, October 20, 2020 9:55 PM
>
> On Tue, Oct 20, 2020 at 09:40:14AM +0000, Liu, Yi L wrote:
>
> > > See previous discussion with Kevin. If I understand correctly, you expect
> > > a
> shared
> > > L2 table if
> From: Jason Gunthorpe
> Sent: Monday, October 19, 2020 10:25 PM
>
> On Mon, Oct 19, 2020 at 08:39:03AM +0000, Liu, Yi L wrote:
> > Hi Jason,
> >
> > Good to see your response.
>
> Ah, I was away
got it. :-)
> > > > > Sec
> From: Jason Wang
> Sent: Tuesday, October 20, 2020 5:20 PM
>
> Hi Yi:
>
> On 2020/10/20 ??4:19, Liu, Yi L wrote:
> >> Yes, but since PASID is a global identifier now, I think kernel
> >> should track the a device list per PASID?
> > We have such track
Hey Jason,
> From: Jason Wang
> Sent: Tuesday, October 20, 2020 2:18 PM
>
> On 2020/10/15 ??6:14, Liu, Yi L wrote:
> >> From: Jason Wang
> >> Sent: Thursday, October 15, 2020 4:41 PM
> >>
> >>
> >> On 2020/10/15 ??3:58, Tian, Kevin wrote
Hi Jason,
Good to see your response.
> From: Jason Gunthorpe
> Sent: Friday, October 16, 2020 11:37 PM
>
> On Wed, Oct 14, 2020 at 03:16:22AM +, Tian, Kevin wrote:
> > Hi, Alex and Jason (G),
> >
> > How about your opinion for this new proposal? For now looks both
> > Jason (W) and Jean are
> From: Jason Wang
> Sent: Thursday, October 15, 2020 4:41 PM
>
>
> On 2020/10/15 ??3:58, Tian, Kevin wrote:
> >> From: Jason Wang
> >> Sent: Thursday, October 15, 2020 2:52 PM
> >>
> >>
> >> On 2020/10/14 ??11:08, Tian, Kevin wrote:
> From: Jason Wang
> Sent: Tuesday, October 13, 20
Hi Alex,
> From: Alex Williamson
> Sent: Saturday, September 12, 2020 4:55 AM
>
> On Thu, 10 Sep 2020 03:45:21 -0700
> Liu Yi L wrote:
>
> > Shared Virtual Addressing (a.k.a Shared Virtual Memory) allows sharing
> > multiple process virtual address spaces
Hi Alex,
> From: Alex Williamson
> Sent: Saturday, September 12, 2020 4:17 AM
>
> On Thu, 10 Sep 2020 03:45:20 -0700
> Liu Yi L wrote:
>
> > This patch exports iommu nesting capability info to user space through
> > VFIO. Userspace is expected to check this
Hi Alex,
> From: Alex Williamson
> Sent: Saturday, September 12, 2020 6:13 AM
>
> On Thu, 10 Sep 2020 03:45:30 -0700
> Liu Yi L wrote:
>
> > This patch exposes PCIe PASID capability to guest for assigned devices.
> > Existing vfio_pci driver hides it from g
Hi Alex,
> From: Alex Williamson
> Sent: Saturday, September 12, 2020 5:38 AM
>
> On Thu, 10 Sep 2020 03:45:24 -0700
> Liu Yi L wrote:
>
> > This patch allows userspace to request PASID allocation/free, e.g. when
> > serving the request from the guest.
> &
Hi Alex,
> From: Alex Williamson
> Sent: Saturday, September 12, 2020 6:04 AM
>
> On Thu, 10 Sep 2020 03:45:27 -0700
> Liu Yi L wrote:
>
> > Nesting translation allows two-levels/stages page tables, with 1st
> > level for guest translations (e.g. GVA->GPA), 2n
re
the binding request.
Cc: Kevin Tian
CC: Jacob Pan
Cc: Alex Williamson
Cc: Eric Auger
Cc: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Jean-Philippe Brucker
Signed-off-by: Liu Yi L
Signed-off-by: Jacob Pan
---
v6 -> v7:
*) introduced @user in struct domain_capsule to
CC: Jacob Pan
Cc: Alex Williamson
Cc: Eric Auger
Cc: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Yi Sun
Signed-off-by: Liu Yi L
---
v6 -> v7:
*) correct the link for the details of modifying pasid prototype to bve "u32".
*) hold off r-b from Eric Auger as ther
Cc: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Liu Yi L
Signed-off-by: Eric Auger
Signed-off-by: Jacob Pan
---
v1 -> v2:
*) rename from "vfio/type1: Flush stage-1 IOMMU cache for nesting type"
*) rename vfio_cache_inv_fn() to vfio_dev_cache_
l
Cc: Lu Baolu
Signed-off-by: Eric Auger
Signed-off-by: Liu Yi L
Reviewed-by: Stefan Hajnoczi
---
v6 -> v7:
*) tweak per Eric's comments.
v5 -> v6:
*) tweak per Eric's comments.
v3 -> v4:
*) add review-by from Stefan Hajnoczi
v2 -> v3:
*) address comments from Stefan Ha
Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Liu Yi L
---
drivers/iommu/intel/svm.c | 7 ---
1 file changed, 7 deletions(-)
diff --git a/drivers/iommu/intel/svm.c b/drivers/iommu/intel/svm.c
index 519eabb..d3cf52b 100644
--- a/drivers/iommu/intel/svm.c
+++ b/drivers/iommu/intel
main requirement is to use the auxiliary domain associated with mdev.
Cc: Kevin Tian
CC: Jacob Pan
CC: Jun Tian
Cc: Alex Williamson
Cc: Eric Auger
Cc: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Liu Yi L
Reviewed-by: Eric Auger
---
v5 -> v6:
*) add review-by f
This patch reports nesting info when iommu_domain_get_attr() is called with
DOMAIN_ATTR_NESTING and one domain with nesting set.
Cc: Kevin Tian
CC: Jacob Pan
Cc: Alex Williamson
Cc: Eric Auger
Cc: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Liu Yi L
Signed-off-by
PASIDs. Currently the quota is a global parameter applied to
all VFIO devices. In the future per-device quota might be supported too.
Cc: Kevin Tian
CC: Jacob Pan
Cc: Eric Auger
Cc: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Suggested-by: Alex Williamson
Signed-off-by: Liu Yi L
Auger
Cc: Jean-Philippe Brucker
Suggested-by: Jean-Philippe Brucker
Signed-off-by: Liu Yi L
Signed-off-by: Jacob Pan
Reviewed-by: Eric Auger
---
v5 -> v6:
*) add review-by from Eric Auger.
v4 -> v5:
*) address comments from Eric Auger.
---
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.
son
Cc: Eric Auger
Cc: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Liu Yi L
Signed-off-by: Jacob Pan
---
v6 -> v7:
*) add a helper function __domain_config_ioasid_set() per Eric's comment.
*) rename @ioasid_sid field of struct dmar_domain to be @pasid_set.
*) Er
fio: VFIO_IOMMU_ATTACH/DETACH_PASID_TABLE.
RFC v1:
https://lore.kernel.org/kvm/1562324772-3084-1-git-send-email-yi.l@intel.com/
---
Eric Auger (1):
vfio: Document dual stage control
Liu Yi L (14):
iommu: Report domain nesting info
iommu/smmu: Report empty domain nesting info
vfio/type
This patch makes change to only supports the case where all the physical iommu
units have the same CAP/ECAP MASKS for nested translation.
Cc: Kevin Tian
CC: Jacob Pan
Cc: Alex Williamson
Cc: Eric Auger
Cc: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Liu Yi L
Signed
-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Liu Yi L
Signed-off-by: Jacob Pan
---
v6 -> v7:
*) rephrase the commit message, replace the @data[] field in struct
iommu_nesting_info with union per comments from Eric Auger.
v5 -> v6:
*) rephrase the feature notes per comment
Williamson
Cc: Eric Auger
Cc: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Liu Yi L
Reviewed-by: Eric Auger
---
v5 -> v6:
*) add review-by from Eric Auger.
v1 -> v2:
*) added in v2, but it was sent in a separate patchseries before
---
drivers/vf
CC: Jacob Pan
Cc: Alex Williamson
Cc: Eric Auger
Cc: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Liu Yi L
Signed-off-by: Jacob Pan
---
v6 -> v7:
*) acquire device_domain_lock in bind/unbind_gpasid() to ensure dmar_domain
is not modified during bind/unbind_gpa
: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Liu Yi L
Signed-off-by: Yi Sun
Signed-off-by: Jacob Pan
---
v6 -> v7:
*) current VFIO returns allocated pasid via signed int, thus VFIO UAPI
can only support 31 bits pasid. If user space gives min,max which is
wider t
cker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Liu Yi L
---
v6 -> v7:
*) using vfio_info_add_capability() for adding nesting cap per suggestion
from Eric.
v5 -> v6:
*) address comments against v5 from Eric Auger.
*) don't report nesting cap to userspace if the nesting_info-
Hi Alex,
> From: Alex Williamson
> Sent: Friday, August 21, 2020 9:49 AM
>
> On Fri, 21 Aug 2020 00:37:19 +0000
> "Liu, Yi L" wrote:
>
> > Hi Alex,
> >
> > > From: Alex Williamson
> > > Sent: Friday, August 21, 2020 4:51 AM
> >
Hi Alex,
> From: Alex Williamson
> Sent: Friday, August 21, 2020 5:49 AM
>
> On Mon, 27 Jul 2020 23:27:41 -0700
> Liu Yi L wrote:
>
> > Recent years, mediated device pass-through framework (e.g. vfio-mdev)
> > is used to achieve flexible device sharing acros
Hi Alex,
> From: Alex Williamson
> Sent: Friday, August 21, 2020 3:52 AM
>
> On Mon, 27 Jul 2020 23:27:33 -0700
> Liu Yi L wrote:
>
> > This patch exports iommu nesting capability info to user space through
> > VFIO. Userspace is expected to check this info for s
Hi Alex,
> From: Alex Williamson
> Sent: Friday, August 21, 2020 4:51 AM
>
> On Mon, 27 Jul 2020 23:27:36 -0700
> Liu Yi L wrote:
>
> > This patch allows userspace to request PASID allocation/free, e.g.
> > when serving the request from the guest.
> &
Hi Alex,
> From: Alex Williamson
> Sent: Friday, August 21, 2020 5:06 AM
>
> On Mon, 27 Jul 2020 23:27:37 -0700
> Liu Yi L wrote:
>
> > From: Yi Sun
> >
> > Current interface is good enough for SVA virtualization on an assigned
> > physical PCI dev
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/
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,
&g
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
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 guidel
Hi Eric,
> From: Auger Eric
> Sent: Sunday, August 16, 2020 7:35 PM
>
> Hi Yi,
>
> On 7/28/20 8:27 AM, Liu Yi L wrote:
> > This patch provides an interface allowing the userspace to invalidate
> > IOMMU cache for first-level page table. It is required when the fi
Hi Eric,
> From: Auger Eric
> Sent: Sunday, August 16, 2020 7:29 PM
>
> Hi Yi,
>
> On 7/28/20 8:27 AM, Liu Yi L wrote:
> > Nesting translation allows two-levels/stages page tables, with 1st level
> > for guest translations (e.g. GVA->GPA), 2nd level for hos
Hi Eric,
> From: Auger Eric
> Sent: Sunday, August 16, 2020 12:30 AM
>
> Hi Yi,
>
> On 7/28/20 8:27 AM, Liu Yi L wrote:
> > When an IOMMU domain with nesting attribute is used for guest SVA, a
> > system-wide PASID is allocated for binding with the device an
Thanks, Eric.
Regards,
Yi Liu
> From: Auger Eric
> Sent: Sunday, August 16, 2020 12:30 AM
>
> Yi,
>
> On 7/28/20 8:27 AM, Liu Yi L wrote:
> > This patch allows userspace to request PASID allocation/free, e.g.
> > when serving the request from the guest.
> &
Hi Eric,
> From: Auger Eric
> Sent: Thursday, August 13, 2020 11:07 PM
>
> Hi Yi,
>
> On 7/28/20 8:27 AM, Liu Yi L wrote:
> > From IOMMU p.o.v., PASIDs allocated and managed by external components
> > (e.g. VFIO) will be passed in for gpasid_bind/unbind o
Hi Eric,
> From: Auger Eric
> Sent: Thursday, August 13, 2020 11:07 PM
>
> Yi,
>
> On 7/28/20 8:27 AM, Liu Yi L wrote:
> > Shared Virtual Addressing (a.k.a Shared Virtual Memory) allows sharing
> > multiple process virtual address spaces with the device for si
Hi Eric,
> From: Auger Eric
> Sent: Thursday, August 13, 2020 9:20 PM
>
> Hi Yi,
> On 7/28/20 8:27 AM, Liu Yi L wrote:
> > This patch exports iommu nesting capability info to user space through
> > VFIO. Userspace is expected to check this info for supported uAPIs
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 needs report the capability info
> s/needs/need to
> > to userspace. It gives information about requireme
> From: Auger Eric
> Sent: Thursday, August 13, 2020 5:31 PM
>
> Hi Yi,
>
> On 8/13/20 11:25 AM, Liu, Yi L wrote:
> > Hi Eric,
> >
> >
> >> From: Auger Eric
> >> Sent: Thursday, August 13, 2020 5:12 PM
> >>
> >> Hi Jacob,
his patch adds sanity checks in the IOMMU layer. In addition to argsz,
> > reserved/unused fields in padding, flags, and version are also checked.
> > Details are documented in Documentation/userspace-api/iommu.rst
> >
> > Signed-off-by: Liu Yi L
> > Signed-off-by: Ja
> From: Lu Baolu
> Sent: Tuesday, July 14, 2020 1:57 PM
>
> Replace iommu_aux_at(de)tach_device() with iommu_aux_at(de)tach_group().
> It also saves the IOMMU_DEV_FEAT_AUX-capable physcail device in the vfio_group
> data structure so that it could be reused in other places.
>
> Signed-off-by: Lu
> From: Alex Williamson
> Sent: Tuesday, July 28, 2020 11:54 PM
>
> On Mon, 27 Jul 2020 23:27:30 -0700
> Liu Yi L wrote:
>
> > This patch refactors the vfio_iommu_type1_ioctl() to use switch
> > instead of if-else, and each command got a helper function.
> &g
son
Cc: Eric Auger
Cc: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Liu Yi L
Signed-off-by: Jacob Pan
---
v5 -> v6:
*) address comments against v5 from Eric Auger.
v4 -> v5:
*) address comments from Eric Auger.
---
drivers/iommu/intel/iom
re
the binding request.
Cc: Kevin Tian
CC: Jacob Pan
Cc: Alex Williamson
Cc: Eric Auger
Cc: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Jean-Philippe Brucker
Signed-off-by: Liu Yi L
Signed-off-by: Jacob Pan
---
v5 -> v6:
*) dropped vfio_find_nesting_group(
This patch reports nesting info, and only supports the case where all
the physical iomms have the same CAP/ECAP MASKS.
Cc: Kevin Tian
CC: Jacob Pan
Cc: Alex Williamson
Cc: Eric Auger
Cc: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Liu Yi L
Signed-off-by: Jacob Pan
Auger
Cc: Jean-Philippe Brucker
Reviewed-by: Eric Auger
Suggested-by: Jean-Philippe Brucker
Signed-off-by: Liu Yi L
Signed-off-by: Jacob Pan
---
v5 -> v6:
*) add review-by from Eric Auger.
v4 -> v5:
*) address comments from Eric Auger.
---
drivers/iommu/arm-smmu-v3.
ATTACH/DETACH_PASID_TABLE.
RFC v1:
https://lore.kernel.org/linux-iommu/1562324772-3084-1-git-send-email-yi.l@intel.com/
---
Eric Auger (1):
vfio: Document dual stage control
Liu Yi L (13):
vfio/type1: Refactor vfio_iommu_type1_ioctl()
iommu: Report domain nesting info
i
PASIDs. Currently the quota is a global parameter applied to
all VFIO devices. In the future per-device quota might be supported too.
Cc: Kevin Tian
CC: Jacob Pan
Cc: Eric Auger
Cc: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Suggested-by: Alex Williamson
Signed-off-by: Liu Yi L
---
v5
: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Liu Yi L
Signed-off-by: Yi Sun
Signed-off-by: Jacob Pan
---
v5 -> v6:
*) address comments from Eric against v5. remove the alloc/free helper.
v4 -> v5:
*) address comments from Eric Auger.
*) the comments for the PASI
: Christoph Hellwig
Signed-off-by: Liu Yi L
---
v4 -> v5:
*) address comments from Eric Auger, add r-b from Eric.
---
drivers/vfio/vfio_iommu_type1.c | 394 ++--
1 file changed, 213 insertions(+), 181 deletions(-)
diff --git a/drivers/vfio/vfio_iommu_type1.c b/driv
l
Cc: Lu Baolu
Reviewed-by: Stefan Hajnoczi
Signed-off-by: Eric Auger
Signed-off-by: Liu Yi L
---
v5 -> v6:
*) tweak per Eric's comments.
v3 -> v4:
*) add review-by from Stefan Hajnoczi
v2 -> v3:
*) address comments from Stefan Hajnoczi
v1 -> v2:
*) new in v2, compare
CC: Jacob Pan
Cc: Alex Williamson
Cc: Eric Auger
Cc: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Liu Yi L
Signed-off-by: Jacob Pan
---
drivers/iommu/intel/iommu.c | 10 ++
drivers/iommu/intel/svm.c | 7 +--
2 files changed, 15 insertions(+), 2
Cc: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Liu Yi L
Signed-off-by: Eric Auger
Signed-off-by: Jacob Pan
---
v1 -> v2:
*) rename from "vfio/type1: Flush stage-1 IOMMU cache for nesting type"
*) rename vfio_cache_inv_fn() to vfio_dev_cache_
nesting info after setting DOMAIN_ATTR_NESTING. For VFIO, it is after
selecting VFIO_TYPE1_NESTING_IOMMU.
Cc: Kevin Tian
CC: Jacob Pan
Cc: Alex Williamson
Cc: Eric Auger
Cc: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Liu Yi L
Signed-off-by: Jacob Pan
---
v5 ->
main requirement is to use the auxiliary domain associated with mdev.
Cc: Kevin Tian
CC: Jacob Pan
CC: Jun Tian
Cc: Alex Williamson
Cc: Eric Auger
Cc: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Reviewed-by: Eric Auger
Signed-off-by: Liu Yi L
---
v5 -> v6:
*) add review-by f
cker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Liu Yi L
---
v5 -> v6:
*) address comments against v5 from Eric Auger.
*) don't report nesting cap to userspace if the nesting_info->format is
invalid.
v4 -> v5:
*) address comments from Eric Auger.
*) return
oedel
Cc: Lu Baolu
Reviewed-by: Eric Auger
Signed-off-by: Yi Sun
Signed-off-by: Liu Yi L
---
v5 -> v6:
*) use "u32" prototype for @pasid.
*) add review-by from Eric Auger.
v2 -> v3:
*) pass in domain info only
*) use u32 for pasid instead of int type
v1 -> v2:
*) added
Williamson
Cc: Eric Auger
Cc: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Reviewed-by: Eric Auger
Signed-off-by: Liu Yi L
---
v5 -> v6:
*) add review-by from Eric Auger.
v1 -> v2:
*) added in v2, but it was sent in a separate patchseries before
---
drivers/vf
Hi Eric,
> From: Auger Eric
> Sent: Saturday, July 18, 2020 9:40 PM
>
> Hi Yi,
>
> On 7/12/20 1:21 PM, Liu Yi L wrote:
> > From: Eric Auger
> >
> > The VFIO API was enhanced to support nested stage control: a bunch of
> > new iotcls and usage g
Hi Eric,
> From: Auger Eric < eric.au...@redhat.com>
> Sent: Monday, July 20, 2020 8:22 PM
>
> Yi,
>
> On 7/12/20 1:21 PM, Liu Yi L wrote:
> > Recent years, mediated device pass-through framework (e.g. vfio-mdev)
> > is used to achieve flexible device sharing
Hi Jean,
> From: Jean-Philippe Brucker
> Sent: Friday, July 17, 2020 5:09 PM
>
> On Thu, Jul 16, 2020 at 10:38:17PM +0200, Auger Eric wrote:
> > Hi Jean,
> >
> > On 7/16/20 5:39 PM, Jean-Philippe Brucker wrote:
> > > On Tue, Jul 14, 2020 at 10:12:49AM +
Hi Jean,
> From: Jean-Philippe Brucker
> Sent: Thursday, July 16, 2020 11:40 PM
>
> On Tue, Jul 14, 2020 at 10:12:49AM +0000, Liu, Yi L wrote:
> > > Have you verified that this doesn't break the existing usage of
> > > DOMAIN_ATTR_NESTING in drivers/vfio/v
s like the subject is straightforward, so I removed
commit
message.
>
> On 7/12/20 1:21 PM, Liu Yi L wrote:
> > Cc: Kevin Tian
> > CC: Jacob Pan
> > Cc: Alex Williamson
> > Cc: Eric Auger
> > Cc: Jean-Philippe Brucker
> > Cc: Joerg Roedel
> > Cc
Hi Eric,
> From: Auger Eric
> Sent: Monday, July 20, 2020 8:35 PM
>
> Yi,
>
> On 7/12/20 1:21 PM, Liu Yi L wrote:
> > This patch exposes PCIe PASID capability to guest for assigned devices.
> > Existing vfio_pci driver hides it from guest by setting the
Eric,
> From: Auger Eric
> Sent: Monday, July 20, 2020 8:38 PM
>
> Yi,
>
> On 7/20/20 12:18 PM, Liu, Yi L wrote:
> > Hi Eric,
> >
> >> From: Auger Eric
> >> Sent: Monday, July 20, 2020 12:06 AM
> >>
> >> Hi Yi,
> >&g
Hi Eric,
> From: Auger Eric
> Sent: Monday, July 20, 2020 5:42 PM
>
> Yi,
>
> On 7/12/20 1:21 PM, Liu Yi L wrote:
> > This patch provides an interface allowing the userspace to invalidate
> > IOMMU cache for first-level page table. It is required when the first
Hi Eric,
> From: Auger Eric
> Sent: Monday, July 20, 2020 5:37 PM
>
> Yi,
>
> On 7/12/20 1:21 PM, Liu Yi L wrote:
> > Nesting translation allows two-levels/stages page tables, with 1st level
> > for guest translations (e.g. GVA->GPA), 2nd level for host trans
Hi Eric,
> From: Auger Eric
> Sent: Monday, July 20, 2020 12:06 AM
>
> Hi Yi,
>
> On 7/12/20 1:21 PM, Liu Yi L wrote:
> > When an IOMMU domain with nesting attribute is used for guest SVA, a
> > system-wide PASID is allocated for binding with the device and the d
Hi Eric,
> From: Auger Eric
> Sent: Sunday, July 19, 2020 11:38 PM
>
> Yi,
>
> On 7/12/20 1:21 PM, Liu Yi L wrote:
> > From: Yi Sun
> >
> > Current interface is good enough for SVA virtualization on an assigned
> > physical PCI device, but whe
Hi Eric,
> From: Auger Eric
> Sent: Sunday, July 19, 2020 11:39 PM
>
> Yi,
>
> On 7/12/20 1:21 PM, Liu Yi L wrote:
> > This patch allows user space to request PASID allocation/free, e.g.
> > when serving the request from the guest.
> >
> >
Hi Eric,
> From: Auger Eric
> Sent: Monday, July 20, 2020 4:33 PM
>
> Yi,
>
> On 7/20/20 9:51 AM, Liu, Yi L wrote:
> > Hi Eric,
> >
> >> From: Auger Eric
> >> Sent: Saturday, July 18, 2020 1:34 AM
> >>
> >> Yi,
> >&
Hi Eric,
> From: Auger Eric
> Sent: Monday, July 20, 2020 4:26 PM
[...]
> >>> +int vfio_pasid_alloc(struct vfio_mm *vmm, int min, int max) {
> >>> + ioasid_t pasid;
> >>> + struct vfio_pasid *vid;
> >>> +
> >>> + pasid = ioasid_alloc(vmm->ioasid_sid, min, max, NULL);
> >>> + if (pasid == INVALID_
Hi Eric,
> From: Auger Eric
> Sent: Sunday, July 19, 2020 11:38 PM
>
> Yi,
>
> On 7/12/20 1:21 PM, Liu Yi L wrote:
> > From IOMMU p.o.v., PASIDs allocated and managed by external components
> > (e.g. VFIO) will be passed in for gpasid_bind/unbind operation. IOM
Hi Eric,
> From: Auger Eric
> Sent: Sunday, July 19, 2020 11:39 PM
>
> Yi,
>
> On 7/12/20 1:21 PM, Liu Yi L wrote:
> > Shared Virtual Addressing (a.k.a Shared Virtual Memory) allows sharing
> > multiple process virtual address spaces with the device for simplifie
Hi Eric,
> From: Auger Eric
> Sent: Saturday, July 18, 2020 1:34 AM
>
> Yi,
>
> On 7/12/20 1:20 PM, Liu Yi L wrote:
> > This patch exports iommu nesting capability info to user space through
> > VFIO. User space is expected to check this info for supported uAPIs (
Hi Eric,
> From: Auger Eric
>
> Yi,
>
> On 7/12/20 1:20 PM, Liu Yi L wrote:
> > This patch is added as instead of returning a boolean for
> > DOMAIN_ATTR_NESTING,
> > iommu_domain_get_attr() should return an iommu_nesting_info handle.
>
> you may add in
Hi Eric,
> From: Auger Eric
> Sent: Saturday, July 18, 2020 12:29 AM
>
> Hi Yi,
>
> On 7/12/20 1:20 PM, Liu Yi L wrote:
> > IOMMUs that support nesting translation needs report the capability info
> s/needs/need to report
yep.
> > to userspace, e.g. the f
> From: Yu, Fenghua
> Sent: Tuesday, July 14, 2020 9:55 PM
> On Mon, Jul 13, 2020 at 07:45:49PM -0700, Liu, Yi L wrote:
> > > From: Fenghua Yu
> > > Sent: Tuesday, July 14, 2020 7:48 AM
> > >
> > > PASID is defined as a few different types in iommu in
Hi Will,
> From: Will Deacon
> Sent: Monday, July 13, 2020 9:15 PM
>
> On Sun, Jul 12, 2020 at 04:20:58AM -0700, Liu Yi L wrote:
> > This patch is added as instead of returning a boolean for
> > DOMAIN_ATTR_NESTING,
> > iommu_domain_get_attr() should retur
> From: Fenghua Yu
> Sent: Tuesday, July 14, 2020 7:48 AM
>
> From: Ashok Raj
>
> ENQCMD and Data Streaming Accelerator (DSA) and all of their associated
> features
> are a complicated stack with lots of interconnected pieces.
> This documentation provides a big picture overview for all of the
> From: Fenghua Yu
> Sent: Tuesday, July 14, 2020 7:48 AM
>
> PASID is defined as a few different types in iommu including "int",
> "u32", and "unsigned int". To be consistent and to match with uapi
> definitions, define PASID and its variations (e.g. max PASID) as "u32".
> "u32" is also shorter
: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Liu Yi L
Signed-off-by: Yi Sun
Signed-off-by: Jacob Pan
---
v4 -> v5:
*) address comments from Eric Auger.
*) the comments for the PASID_FREE request is addressed in patch 5/15 of
this series.
v3 -> v4:
*) address co
lated discussion about this decision.
https://lkml.org/lkml/2020/5/15/1028
Cc: Kevin Tian
CC: Jacob Pan
Cc: Alex Williamson
Cc: Eric Auger
Cc: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Liu Yi L
---
v4 -> v5:
*) address comments from Eric Auger.
*) retur
_PASID_TABLE.
RFC v1:
https://lore.kernel.org/linux-iommu/1562324772-3084-1-git-send-email-yi.l@intel.com/
---
Eric Auger (1):
vfio: Document dual stage control
Liu Yi L (13):
vfio/type1: Refactor vfio_iommu_type1_ioctl()
iommu: Report domain nesting info
iommu/smmu: Report empty
: Alex Williamson
Cc: Eric Auger
Cc: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Liu Yi L
Signed-off-by: Jacob Pan
---
v4 -> v5:
*) address comments from Eric Auger.
v3 -> v4:
*) split the SMMU driver changes to be a separate patch
*) move the @addr_wid
l
Cc: Lu Baolu
Reviewed-by: Stefan Hajnoczi
Signed-off-by: Eric Auger
Signed-off-by: Liu Yi L
---
v3 -> v4:
*) add review-by from Stefan Hajnoczi
v2 -> v3:
*) address comments from Stefan Hajnoczi
v1 -> v2:
*) new in v2, compared with Eric's original version, pasid tabl
per the above reason.
Cc: Kevin Tian
CC: Jacob Pan
Cc: Alex Williamson
Cc: Eric Auger
Cc: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Yi Sun
Signed-off-by: Liu Yi L
---
v2 -> v3:
*) pass in domain info only
*) use ioasid_t for pasid instead of int type
v1 -&
: Christoph Hellwig
Signed-off-by: Liu Yi L
---
v4 -> v5:
*) address comments from Eric Auger, add r-b from Eric.
---
drivers/vfio/vfio_iommu_type1.c | 394 ++--
1 file changed, 213 insertions(+), 181 deletions(-)
diff --git a/drivers/vfio/vfio_iommu_type1.c b/driv
Cc: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Liu Yi L
Signed-off-by: Eric Auger
Signed-off-by: Jacob Pan
---
v1 -> v2:
*) rename from "vfio/type1: Flush stage-1 IOMMU cache for nesting type"
*) rename vfio_cache_inv_fn() to vfio_dev_cache_
lex Williamson
Cc: Eric Auger
Cc: Jean-Philippe Brucker
Cc: Joerg Roedel
Cc: Lu Baolu
Signed-off-by: Liu Yi L
Signed-off-by: Jacob Pan
---
v4 -> v5:
*) address comments from Eric Auger.
---
drivers/iommu/intel/iommu.c | 22 ++
include/linux/intel-iommu.h | 4
include
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