Steve, I think this is a loose end that I myself am not sure if worth
fixing, copy Eugenio for his awareness. Reason is that when CVQ is in
place it always has to cope with device state saving and restoration
using shadowed virtqueue for a lot of cases not just migration, and
that's the reas
On 10/25/2023 11:55 PM, Si-Wei Liu wrote:
On 10/25/2023 10:26 PM, Michael S. Tsirkin wrote:
On Wed, Oct 25, 2023 at 04:13:14PM -0700, Si-Wei Liu wrote:
When the vhost-vdpa device is being closed, vhost_vdpa_cleanup()
doesn't
clean up the vqs pointer after free. This could lead t
tself.
Additionally, implement .compat_reset to cater for older userspace,
which may wish to see mapping to be cleared during reset.
Signed-off-by: Si-Wei Liu
Tested-by: Stefano Garzarella
---
drivers/vdpa/vdpa_sim/vdpa_sim.c | 52 ++--
1 file changed, 43 insertions(
ompared to overloading the existing .reset with
flags, .compat_reset won't cause any extra burden to the implementation
of every compliant driver.
Signed-off-by: Si-Wei Liu
Tested-by: Dragos Tatulea
Tested-by: Lei Yang
---
drivers/vhost/vdpa.c | 20
drivers/virtio/vir
it is safe to skip this unmap & map in the case of vhost stop
& start cycle.
In that sense, this feature flag is actually a signal for userspace to
know that the driver bug has been solved. Not offering it indicates that
userspace cannot trust the kernel will retain the maps.
Signed-off-by:
d clean up memory mappings by itself.
Additionally, implement .compat_reset to cater for older userspace,
which may wish to see mapping to be cleared during reset.
Co-developed-by: Dragos Tatulea
Signed-off-by: Dragos Tatulea
Signed-off-by: Si-Wei Liu
---
drivers/vdpa/mlx5/core/mlx5_vdpa.h | 1
ot bother to implement such op,
but only those drivers that are doing or used to do non-compliant
map-cleaning reset will have to.
Signed-off-by: Si-Wei Liu
---
include/linux/vdpa.h | 13 +
1 file changed, 13 insertions(+)
diff --git a/include/linux/vdpa.h b/include/linux/vdp
ot a MUST for every parent that implements the
.dma_map or .set_map API, because device may work with DMA ops directly
by implement their own to manipulate system memory mappings, so don't
have to use .reset_map to achieve a simple IOMMU device model for 1:1
passthrough mapping.
Signed-off-
evice reset should not cause mapping to go away on such
IOTLB model, so persistent mapping is implied across reset. Before the
userspace process using vhost-vdpa is gone, give it a chance to reset
iotlb back to the initial state in vhost_vdpa_cleanup().
Signed-off-by: Si-Wei Liu
Acked-by: Eugenio
nd-email-si-wei@oracle.com/
---
Si-Wei Liu (7):
vdpa: introduce .reset_map operation callback
vhost-vdpa: reset vendor specific mapping to initial state in .release
vhost-vdpa: introduce IOTLB_PERSIST backend feature bit
vdpa: introduce .compat_reset operation callback
vhost-vdpa: clean i
On 10/25/2023 10:26 PM, Michael S. Tsirkin wrote:
On Wed, Oct 25, 2023 at 04:13:14PM -0700, Si-Wei Liu wrote:
When the vhost-vdpa device is being closed, vhost_vdpa_cleanup() doesn't
clean up the vqs pointer after free. This could lead to use-after-tree
when _compat_vdpa_reset() tri
2:41 AM, Lei Yang wrote:
On Wed, Oct 25, 2023 at 1:27 AM Si-Wei Liu wrote:
Hello Si-Wei
Thanks a lot for testing! Please be aware that there's a follow-up fix
for a potential oops in this v4 series:
The first, when I did not apply this patch [1], I will also hit this
patch mentioned pr
all/CAPpAL=yhdqn1aztecn3mps8o4m+bl_hvy02fdpihn7dwd91...@mail.gmail.com/
Signed-off-by: Si-Wei Liu
---
drivers/vhost/vdpa.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 9a2343c45df0..30df5c58db73 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/
51 PM, Lei Yang wrote:
QE tested this series v4 with regression testing on real nic, there is
no new regression bug.
Tested-by: Lei Yang
On Tue, Oct 24, 2023 at 6:02 AM Si-Wei Liu wrote:
On 10/22/2023 8:51 PM, Jason Wang wrote:
Hi Si-Wei:
On Sat, Oct 21, 2023 at 5:28 PM Si-Wei Liu wrote
On 10/24/2023 9:21 AM, Si-Wei Liu wrote:
On 10/23/2023 10:45 PM, Jason Wang wrote:
On Sat, Oct 21, 2023 at 5:28 PM Si-Wei Liu
wrote:
Using .compat_reset op from the previous patch, the buggy .reset
behaviour can be kept as-is on older userspace apps, which don't ack
the
IOTLB_PE
On 10/23/2023 10:45 PM, Jason Wang wrote:
On Sat, Oct 21, 2023 at 5:28 PM Si-Wei Liu wrote:
Using .compat_reset op from the previous patch, the buggy .reset
behaviour can be kept as-is on older userspace apps, which don't ack the
IOTLB_PERSIST backend feature. As this compatibility qui
om/
Signed-off-by: Si-Wei Liu
---
drivers/vhost/vdpa.c | 8 +---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 9ce40003793b..9a2343c45df0 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -232,9 +232,11 @@ static i
59 AM, Dragos Tatulea wrote:
On Sat, 2023-10-21 at 02:25 -0700, Si-Wei Liu wrote:
Using .compat_reset op from the previous patch, the buggy .reset
behaviour can be kept as-is on older userspace apps, which don't ack the
IOTLB_PERSIST backend feature. As this compatibility quirk is limite
On 10/22/2023 8:51 PM, Jason Wang wrote:
Hi Si-Wei:
On Sat, Oct 21, 2023 at 5:28 PM Si-Wei Liu wrote:
In order to reduce needlessly high setup and teardown cost
of iotlb mapping during live migration, it's crucial to
decouple the vhost-vdpa iotlb abstraction from the virtio
device
ompared to overloading the existing .reset with
flags, .compat_reset won't cause any extra burden to the implementation
of every compliant driver.
Signed-off-by: Si-Wei Liu
---
drivers/vhost/vdpa.c | 17 +
drivers/virtio/virtio_vdpa.c | 2 +-
include/linux/vdpa.h
d clean up memory mappings by itself.
Additionally, implement .compat_reset to cater for older userspace,
which may wish to see mapping to be cleared during reset.
Co-developed-by: Dragos Tatulea
Signed-off-by: Dragos Tatulea
Signed-off-by: Si-Wei Liu
---
drivers/vdpa/mlx5/core/mlx5_vdpa.h | 1
tself.
Additionally, implement .compat_reset to cater for older userspace,
which may wish to see mapping to be cleared during reset.
Signed-off-by: Si-Wei Liu
Tested-by: Stefano Garzarella
---
drivers/vdpa/vdpa_sim/vdpa_sim.c | 52 ++--
1 file changed, 43 insertions(
it is safe to skip this unmap & map in the case of vhost stop
& start cycle.
In that sense, this feature flag is actually a signal for userspace to
know that the driver bug has been solved. Not offering it indicates that
userspace cannot trust the kernel will retain the maps.
Signed-off-by:
evice reset should not cause mapping to go away on such
IOTLB model, so persistent mapping is implied across reset. Before the
userspace process using vhost-vdpa is gone, give it a chance to reset
iotlb back to the initial state in vhost_vdpa_cleanup().
Signed-off-by: Si-Wei Liu
Acked-by: Eugenio
ot a MUST for every parent that implements the
.dma_map or .set_map API, because device may work with DMA ops directly
by implement their own to manipulate system memory mappings, so don't
have to use .reset_map to achieve a simple IOMMU device model for 1:1
passthrough mapping.
Signed-off-
ot bother to implement such op,
but only those drivers that are doing or used to do non-compliant
map-cleaning reset will have to.
Signed-off-by: Si-Wei Liu
---
include/linux/vdpa.h | 13 +
1 file changed, 13 insertions(+)
diff --git a/include/linux/vdpa.h b/include/linux/vdp
RFC v3:
- fix missing return due to merge error in patch #4
RFC v2:
- rebased on top of the "[PATCH RFC v2 0/3] vdpa: dedicated descriptor table
group" series:
https://lore.kernel.org/virtualization/1694248959-13369-1-git-send-email-si-wei@oracle.com/
---
Si-Wei Liu (7):
On 10/19/2023 9:11 PM, Jason Wang wrote:
On Fri, Oct 20, 2023 at 6:28 AM Si-Wei Liu wrote:
On 10/19/2023 7:39 AM, Eugenio Perez Martin wrote:
On Thu, Oct 19, 2023 at 10:27 AM Jason Wang wrote:
On Thu, Oct 19, 2023 at 2:47 PM Si-Wei Liu wrote:
On 10/18/2023 7:53 PM, Jason Wang wrote
On 10/19/2023 2:29 AM, Stefano Garzarella wrote:
On Wed, Oct 18, 2023 at 04:47:48PM -0700, Si-Wei Liu wrote:
On 10/18/2023 1:05 AM, Stefano Garzarella wrote:
On Tue, Oct 17, 2023 at 10:11:33PM -0700, Si-Wei Liu wrote:
RFC only. Not tested on vdpa-sim-blk with user virtual address.
Works
For patches 05-16:
Reviewed-by: Si-Wei Liu
Tested-by: Si-Wei Liu
Thanks for the fixes!
On 10/18/2023 10:14 AM, Dragos Tatulea wrote:
This patch series adds support for vq descriptor table mappings which
are used to improve vdpa live migration downtime. The improvement comes
from using
On 10/17/2023 10:27 PM, Jason Wang wrote:
If we do
this without a negotiation, IOTLB will not be clear but the Qemu will
try to re-program the IOTLB after reset. Which will break?
1) stick the exact old behaviour with just one line of check
It's not just one line of check here, the old be
On 10/19/2023 7:39 AM, Eugenio Perez Martin wrote:
On Thu, Oct 19, 2023 at 10:27 AM Jason Wang wrote:
On Thu, Oct 19, 2023 at 2:47 PM Si-Wei Liu wrote:
On 10/18/2023 7:53 PM, Jason Wang wrote:
On Wed, Oct 18, 2023 at 4:49 PM Si-Wei Liu wrote:
On 10/18/2023 12:00 AM, Jason Wang wrote
On 10/18/2023 7:53 PM, Jason Wang wrote:
On Wed, Oct 18, 2023 at 4:49 PM Si-Wei Liu wrote:
On 10/18/2023 12:00 AM, Jason Wang wrote:
Unfortunately, it's a must to stick to ABI. I agree it's a mess but we
don't have a better choice. Or we can fail the probe if userspace
d
FC v2:
- rebased on top of the "[PATCH RFC v2 0/3] vdpa: dedicated descriptor table
group" series:
https://lore.kernel.org/virtualization/1694248959-13369-1-git-send-email-si-wei@oracle.com/
---
Si-Wei Liu (5):
vdpa: introduce .reset_map operation callback
vhost-vdpa: reset
Add a module paramemter, iotlb_persist, to cater for older userspace
which may wish to see mapping to be cleared during reset.
Signed-off-by: Si-Wei Liu
Tested-by: Stefano Garzarella
---
drivers/vdpa/vdpa_sim/vdpa_sim.c | 58 ++--
1 file changed, 47 insertions(+
have also implemented their own DMA ops, so don't
have to use .reset_map to achieve a simple IOMMU device model for 1:1
passthrough mapping, either.
Signed-off-by: Si-Wei Liu
Acked-by: Eugenio Pérez
Acked-by: Jason Wang
---
include/linux/vdpa.h | 10 ++
1 file changed, 10 insertions(+
it is safe to skip this unmap & map in the
case of vhost stop & start cycle.
In that sense, this feature flag is actually a signal for userspace
to know that the driver bug has been solved. Not offering it
indicates that userspace cannot trust the kernel will retain the
maps.
Signed-off-by:
evice reset does not cause mapping go away on
such IOTLB model in need of persistent mapping. Before vhost-vdpa
is going away, give them a chance to reset iotlb back to the initial
state in vhost_vdpa_cleanup().
Signed-off-by: Si-Wei Liu
Acked-by: Eugenio Pérez
---
drivers/vhost/vdpa.c
d clean up memory
mappings by itself.
Add a module paramemter, persist_mapping, to cater for older userspace
which may wish to see mapping to be cleared during reset.
Co-developed-by: Dragos Tatulea
Signed-off-by: Dragos Tatulea
Signed-off-by: Si-Wei Liu
---
drivers/vdpa/mlx5/core/mlx5_vdpa.h | 1
On 10/18/2023 1:05 AM, Stefano Garzarella wrote:
On Tue, Oct 17, 2023 at 10:11:33PM -0700, Si-Wei Liu wrote:
RFC only. Not tested on vdpa-sim-blk with user virtual address.
Works fine with vdpa-sim-net which uses physical address to map.
This patch is based on top of [1].
[1]
https
On 10/18/2023 4:14 AM, Eugenio Perez Martin wrote:
On Wed, Oct 18, 2023 at 10:44 AM Si-Wei Liu wrote:
On 10/17/2023 10:27 PM, Jason Wang wrote:
On Wed, Oct 18, 2023 at 12:36 PM Si-Wei Liu wrote:
On 10/16/2023 7:35 PM, Jason Wang wrote:
On Tue, Oct 17, 2023 at 4:30 AM Si-Wei Liu wrote
On 10/18/2023 12:00 AM, Jason Wang wrote:
Unfortunately, it's a must to stick to ABI. I agree it's a mess but we
don't have a better choice. Or we can fail the probe if userspace
doesn't ack this feature.
Antoher idea we can just do the following in vhost_vdpa reset?
config->reset()
if (IOTL
On 10/17/2023 10:27 PM, Jason Wang wrote:
On Wed, Oct 18, 2023 at 12:36 PM Si-Wei Liu wrote:
On 10/16/2023 7:35 PM, Jason Wang wrote:
On Tue, Oct 17, 2023 at 4:30 AM Si-Wei Liu wrote:
On 10/16/2023 4:28 AM, Eugenio Perez Martin wrote:
On Mon, Oct 16, 2023 at 8:33 AM Jason Wang wrote
Hi Stefano,
On 10/17/2023 6:44 AM, Stefano Garzarella wrote:
On Fri, Oct 13, 2023 at 10:29:26AM -0700, Si-Wei Liu wrote:
Hi Stefano,
On 10/13/2023 2:22 AM, Stefano Garzarella wrote:
Hi Si-Wei,
On Fri, Oct 13, 2023 at 01:23:40AM -0700, Si-Wei Liu wrote:
RFC only. Not tested on vdpa-sim-blk
RFC only. Not tested on vdpa-sim-blk with user virtual address.
Works fine with vdpa-sim-net which uses physical address to map.
This patch is based on top of [1].
[1]
https://lore.kernel.org/virtualization/1696928580-7520-1-git-send-email-si-wei@oracle.com/
Signed-off-by: Si-Wei Liu
On 10/16/2023 7:35 PM, Jason Wang wrote:
On Tue, Oct 17, 2023 at 4:30 AM Si-Wei Liu wrote:
On 10/16/2023 4:28 AM, Eugenio Perez Martin wrote:
On Mon, Oct 16, 2023 at 8:33 AM Jason Wang wrote:
On Fri, Oct 13, 2023 at 3:36 PM Si-Wei Liu wrote:
On 10/12/2023 8:01 PM, Jason Wang wrote
by itself.
The cvq mapping also needs to be cleared if is in the given ASID.
Co-developed-by: Dragos Tatulea
Signed-off-by: Dragos Tatulea
Signed-off-by: Si-Wei Liu
Acked-by: Eugenio Pérez
---
drivers/vdpa/mlx5/core/mlx5_vdpa.h | 1 +
drivers/vdpa/mlx5/core/mr.c| 17
eturn due to merge error in patch #4
RFC v2:
- rebased on top of the "[PATCH RFC v2 0/3] vdpa: dedicated descriptor table
group" series:
https://lore.kernel.org/virtualization/1694248959-13369-1-git-send-email-si-wei@oracle.com/
---
Si-Wei Liu (4):
vdpa: introduce .reset_map ope
have also implemented their own DMA ops, so don't
have to use .reset_map to achieve a simple IOMMU device model for 1:1
passthrough mapping, either.
Signed-off-by: Si-Wei Liu
Acked-by: Eugenio Pérez
Acked-by: Jason Wang
---
include/linux/vdpa.h | 10 ++
1 file changed, 10 insertions(+
evice reset does not cause mapping go away on
such IOTLB model in need of persistent mapping. Before vhost-vdpa
is going away, give them a chance to reset iotlb back to the initial
state in vhost_vdpa_cleanup().
Signed-off-by: Si-Wei Liu
Acked-by: Eugenio Pérez
---
drivers/vhost/vdpa.c
it is safe to skip this unmap & map in the
case of vhost stop & start cycle.
In that sense, this feature flag is actually a signal for userspace
to know that the driver bug has been solved. Not offering it
indicates that userspace cannot trust the kernel will retain the
maps.
Signed-off-by:
On 10/16/2023 4:28 AM, Eugenio Perez Martin wrote:
On Mon, Oct 16, 2023 at 8:33 AM Jason Wang wrote:
On Fri, Oct 13, 2023 at 3:36 PM Si-Wei Liu wrote:
On 10/12/2023 8:01 PM, Jason Wang wrote:
On Tue, Oct 10, 2023 at 5:05 PM Si-Wei Liu wrote:
Devices with on-chip IOMMU or vendor
On 10/15/2023 11:32 PM, Jason Wang wrote:
On Fri, Oct 13, 2023 at 3:36 PM Si-Wei Liu wrote:
On 10/12/2023 8:01 PM, Jason Wang wrote:
On Tue, Oct 10, 2023 at 5:05 PM Si-Wei Liu wrote:
Devices with on-chip IOMMU or vendor specific IOTLB implementation
may need to restore iotlb mapping to
Hi Stefano,
On 10/13/2023 2:22 AM, Stefano Garzarella wrote:
Hi Si-Wei,
On Fri, Oct 13, 2023 at 01:23:40AM -0700, Si-Wei Liu wrote:
RFC only. Not tested on vdpa-sim-blk with user virtual address.
I can test it, but what I should stress?
Great, thank you! As you see, my patch moved
RFC only. Not tested on vdpa-sim-blk with user virtual address.
Works fine with vdpa-sim-net which uses physical address to map.
This patch is based on top of [1].
[1]
https://lore.kernel.org/virtualization/1696928580-7520-1-git-send-email-si-wei@oracle.com/
Signed-off-by: Si-Wei Liu
On 10/12/2023 8:04 PM, Jason Wang wrote:
On Tue, Oct 10, 2023 at 5:05 PM Si-Wei Liu wrote:
Since commit 6f5312f80183 ("vdpa/mlx5: Add support for running with
virtio_vdpa"), mlx5_vdpa starts with preallocate 1:1 DMA MR at device
creation time. This 1:1 DMA MR will be implicitly
On 10/12/2023 7:49 PM, Jason Wang wrote:
On Tue, Oct 10, 2023 at 5:05 PM Si-Wei Liu wrote:
Device specific IOMMU parent driver who wishes to see mapping to be
decoupled from virtio or vdpa device life cycle (device reset) can use
it to restore memory mapping in the device IOMMU to the
On 10/12/2023 8:01 PM, Jason Wang wrote:
On Tue, Oct 10, 2023 at 5:05 PM Si-Wei Liu wrote:
Devices with on-chip IOMMU or vendor specific IOTLB implementation
may need to restore iotlb mapping to the initial or default state
using the .reset_map op, as it's desirable for some parent de
On 10/11/2023 4:21 AM, Eugenio Perez Martin wrote:
On Tue, Oct 10, 2023 at 11:05 AM Si-Wei Liu wrote:
Devices with on-chip IOMMU or vendor specific IOTLB implementation
may need to restore iotlb mapping to the initial or default state
using the .reset_map op, as it's desirable for
by itself.
The cvq mapping also needs to be cleared if is in the given ASID.
Co-developed-by: Dragos Tatulea
Signed-off-by: Dragos Tatulea
Signed-off-by: Si-Wei Liu
---
drivers/vdpa/mlx5/core/mlx5_vdpa.h | 1 +
drivers/vdpa/mlx5/core/mr.c| 17 +
drivers/vdp
es on-chip IOMMU to perform 1:1
passthrough translation from PA to IOVA as-is to begin with, and
.reset_map is the only means to turn back iotlb to the identity
mapping mode after vhost-vdpa is gone.
Signed-off-by: Si-Wei Liu
---
drivers/vhost/vdpa.c | 15 +++
include/
eries:
https://lore.kernel.org/virtualization/1694248959-13369-1-git-send-email-si-wei@oracle.com/
---
Si-Wei Liu (4):
vdpa: introduce .reset_map operation callback
vhost-vdpa: reset vendor specific mapping to initial state in .release
vhost-vdpa: introduce IOTLB_PERSIST backend feature
: Si-Wei Liu
---
include/linux/vdpa.h | 10 ++
1 file changed, 10 insertions(+)
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index d376309..26ae6ae 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -327,6 +327,15 @@ struct vdpa_map_file
evice reset does not cause mapping go away on
such IOTLB model in need of persistent mapping. Before vhost-vdpa
is going away, give them a chance to reset iotlb back to the initial
state in vhost_vdpa_cleanup().
Signed-off-by: Si-Wei Liu
---
drivers/vhost/vdpa.c | 16
1 file ch
mr for vq descriptor
vdpa/mlx5: Enable hw support for vq descriptor mapping
vdpa/mlx5: Make iotlb helper functions more generic
vdpa/mlx5: Update cvq iotlb mapping on ASID change
Cover letter: vdpa/mlx5: Add support for vq descriptor mappings
Si-Wei Liu (3):
vdpa: introduce dedicated
pdate flow
vdpa/mlx5: Introduce mr for vq descriptor
vdpa/mlx5: Enable hw support for vq descriptor mapping
vdpa/mlx5: Make iotlb helper functions more generic
vdpa/mlx5: Update cvq iotlb mapping on ASID change
Cover letter: vdpa/mlx5: Add support for vq descriptor mappings
Si-
On 9/12/2023 12:01 AM, Jason Wang wrote:
On Tue, Sep 12, 2023 at 8:28 AM Si-Wei Liu wrote:
On 9/10/2023 8:52 PM, Jason Wang wrote:
On Sat, Sep 9, 2023 at 9:46 PM Si-Wei Liu wrote:
Userspace needs this feature flag to distinguish if vhost-vdpa
iotlb in the kernel supports persistent
On 9/11/2023 11:53 PM, Jason Wang wrote:
On Tue, Sep 12, 2023 at 8:02 AM Si-Wei Liu wrote:
On 9/10/2023 8:48 PM, Jason Wang wrote:
On Sat, Sep 9, 2023 at 9:46 PM Si-Wei Liu wrote:
Today, mlx5_vdpa gets started by preallocate 1:1 DMA mapping at
device creation time, while this 1:1
On 9/11/2023 11:23 PM, Jason Wang wrote:
On Tue, Sep 12, 2023 at 7:31 AM Si-Wei Liu wrote:
Hi Jason,
On 9/10/2023 8:42 PM, Jason Wang wrote:
Hi Si-Wei:
On Sat, Sep 9, 2023 at 9:34 PM Si-Wei Liu wrote:
On-chip IOMMU parent driver could use it to restore memory mapping
to the initial
Thanks David, for clarifications. Now I see the patch just got posted by
Shannon (thanks!) with the correct iproute2 label in the subject line.
We may expect to see this land on iproute2 repo soon?
Thanks!
-Siwei
On 9/9/2023 1:36 PM, David Ahern wrote:
On 9/8/23 12:37 PM, Si-Wei Liu wrote
On 9/10/2023 8:52 PM, Jason Wang wrote:
On Sat, Sep 9, 2023 at 9:46 PM Si-Wei Liu wrote:
Userspace needs this feature flag to distinguish if vhost-vdpa
iotlb in the kernel supports persistent IOTLB mapping across
device reset.
As discussed, the IOTLB persists for devices with platform IOMMU
On 9/10/2023 8:48 PM, Jason Wang wrote:
On Sat, Sep 9, 2023 at 9:46 PM Si-Wei Liu wrote:
Today, mlx5_vdpa gets started by preallocate 1:1 DMA mapping at
device creation time, while this 1:1 mapping will be implicitly
destroyed when the first .set_map call is invoked. Everytime
when the
Hi Jason,
On 9/10/2023 8:42 PM, Jason Wang wrote:
Hi Si-Wei:
On Sat, Sep 9, 2023 at 9:34 PM Si-Wei Liu wrote:
On-chip IOMMU parent driver could use it to restore memory mapping
to the initial state.
As discussed before. On-chip IOMMU is the hardware details that need
to be hidden by the
has the expected
.reset_map support in driver
Signed-off-by: Si-Wei Liu
---
RFC v2 -> v3:
- fix missing return due to merge error
---
drivers/vhost/vdpa.c | 16 +++-
include/uapi/linux/vhost_types.h | 2 ++
2 files changed, 17 insertions(+), 1 deletion(-)
diff --gi
mapping, then the device
.reset routine can run free from having to clean up memory
mappings.
Signed-off-by: Si-Wei Liu
---
RFC v1 -> v2:
- fix error path when both CVQ and DVQ fall in same asid
---
drivers/vdpa/mlx5/core/mlx5_vdpa.h | 1 +
drivers/vdpa/mlx5/core/mr.c|
.
Signed-off-by: Si-Wei Liu
---
drivers/vhost/vdpa.c | 17 +
1 file changed, 17 insertions(+)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index eabac06..71fbd559 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -131,6 +131,15 @@ static struct
On-chip IOMMU parent driver could use it to restore memory mapping
to the initial state.
Signed-off-by: Si-Wei Liu
---
include/linux/vdpa.h | 7 +++
1 file changed, 7 insertions(+)
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index 17a4efa..daecf55 100644
--- a/include/linux
[PATCH RFC v2 0/3] vdpa: dedicated descriptor table
group" series:
https://lore.kernel.org/virtualization/1694248959-13369-1-git-send-email-si-wei@oracle.com/
---
Si-Wei Liu (4):
vdpa: introduce .reset_map operation callback
vdpa/mlx5: implement .reset_map driver op
vhost-vdpa: s
has the expected
.reset_map support in driver
Signed-off-by: Si-Wei Liu
---
drivers/vhost/vdpa.c | 15 ++-
include/uapi/linux/vhost_types.h | 2 ++
2 files changed, 16 insertions(+), 1 deletion(-)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 71fbd559
On-chip IOMMU parent driver could use it to restore memory mapping
to the initial state.
Signed-off-by: Si-Wei Liu
---
include/linux/vdpa.h | 7 +++
1 file changed, 7 insertions(+)
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index 17a4efa..daecf55 100644
--- a/include/linux
up" series:
https://lore.kernel.org/virtualization/1694248959-13369-1-git-send-email-si-wei@oracle.com/
---
Si-Wei Liu (4):
vdpa: introduce .reset_map operation callback
vdpa/mlx5: implement .reset_map driver op
vhost-vdpa: should restore 1:1 dma mapping before detaching driv
mapping, then the device
.reset routine can run free from having to clean up memory
mappings.
Signed-off-by: Si-Wei Liu
---
RFC v1 -> v2:
- fix error path when both CVQ and DVQ fall in same asid
---
drivers/vdpa/mlx5/core/mlx5_vdpa.h | 1 +
drivers/vdpa/mlx5/core/mr.c|
.
Signed-off-by: Si-Wei Liu
---
drivers/vhost/vdpa.c | 17 +
1 file changed, 17 insertions(+)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index eabac06..71fbd559 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -131,6 +131,15 @@ static struct
-off-by: Si-Wei Liu
Acked-by: Eugenio Pérez
---
drivers/vhost/vdpa.c | 10 ++
include/uapi/linux/vhost.h | 8
2 files changed, 18 insertions(+)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index f2e5dce..eabac06 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers
|1
vq_desc_group |2 |1
---
Si-Wei Liu (3):
vdpa: introduce dedicated descriptor group for virtqueue
vhost-vdpa: introduce descriptor group backend feature
vhost-vdpa: uAPI to get dedicated descriptor group id
drivers/vhost/vdpa.c | 27
asn't
been exposed will result in an error.
Signed-off-by: Si-Wei Liu
Acked-by: Eugenio Pérez
---
RFC v1 -> v2:
- add clarifications for what areas F_DESC_ASID should cover
---
drivers/vhost/vdpa.c | 17 +
include/uapi/linux/vhost_types.h | 5 +
2 file
to the default address space, i.e. in ASID 0.
QEMU's shadow virtqueue is going to utilize dedicated descriptor group
to speed up map and unmap operations, yielding tremendous downtime
reduction by avoiding the full and slow remap cycle in SVQ switching.
Signed-off-by: Si-Wei Liu
Acked-by: Eugeni
On 9/7/2023 5:07 PM, David Ahern wrote:
On 9/7/23 2:41 PM, Si-Wei Liu wrote:
Hi David,
Why this patch doesn't get picked in the last 4 months? Maybe the
subject is not clear, but this is an iproute2 patch. Would it be
possible to merge at your earliest convenience?
PS, adding my R-b t
xdeadbeef"
>
> Fixes: a4442ce58ebb ("vdpa: allow provisioning device features")
> Signed-off-by: Allen Hubbe
> Reviewed-by: Shannon Nelson
Reviewed-by: Si-Wei Liu
> ---
> vdpa/vdpa.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/vdpa/vdpa.c
On 8/22/2023 1:54 AM, Jason Wang wrote:
On Thu, Aug 17, 2023 at 7:44 AM Si-Wei Liu wrote:
On 8/15/2023 6:48 PM, Jason Wang wrote:
On Wed, Aug 16, 2023 at 6:31 AM Si-Wei Liu wrote:
On 8/14/2023 7:25 PM, Jason Wang wrote:
On Tue, Aug 15, 2023 at 9:45 AM Si-Wei Liu wrote:
Signed-off-by
On 8/17/2023 8:28 AM, Eugenio Perez Martin wrote:
On Thu, Aug 17, 2023 at 2:05 AM Si-Wei Liu wrote:
On 8/15/2023 6:55 PM, Jason Wang wrote:
On Wed, Aug 16, 2023 at 3:49 AM Si-Wei Liu wrote:
On 8/14/2023 7:21 PM, Jason Wang wrote:
On Tue, Aug 15, 2023 at 9:46 AM Si-Wei Liu wrote
On 8/15/2023 6:55 PM, Jason Wang wrote:
On Wed, Aug 16, 2023 at 3:49 AM Si-Wei Liu wrote:
On 8/14/2023 7:21 PM, Jason Wang wrote:
On Tue, Aug 15, 2023 at 9:46 AM Si-Wei Liu wrote:
Signed-off-by: Si-Wei Liu
---
include/linux/vdpa.h | 7 +++
1 file changed, 7 insertions(+)
diff
On 8/15/2023 6:48 PM, Jason Wang wrote:
On Wed, Aug 16, 2023 at 6:31 AM Si-Wei Liu wrote:
On 8/14/2023 7:25 PM, Jason Wang wrote:
On Tue, Aug 15, 2023 at 9:45 AM Si-Wei Liu wrote:
Signed-off-by: Si-Wei Liu
---
drivers/vhost/vdpa.c | 16 +++-
include/uapi
On 8/9/2023 8:50 PM, Jason Wang wrote:
On Wed, Aug 9, 2023 at 8:56 PM Si-Wei Liu wrote:
Following patchset introduces dedicated group for descriptor table to
reduce live migration downtime when passthrough VQ is being switched
to shadow VQ. As this RFC set is to seek early feedback on the
On 8/9/2023 8:49 PM, Jason Wang wrote:
On Wed, Aug 9, 2023 at 8:56 PM Si-Wei Liu wrote:
Userspace knows if the device has dedicated descriptor group or not
by checking this feature bit.
It's only exposed if the vdpa driver backend implements the
.get_vq_desc_group() operation cal
On 8/9/2023 7:49 AM, Eugenio Perez Martin wrote:
On Wed, Aug 9, 2023 at 2:56 PM Si-Wei Liu wrote:
Following patchset introduces dedicated group for descriptor table to
reduce live migration downtime when passthrough VQ is being switched
to shadow VQ. As this RFC set is to seek early feedback
On 8/15/2023 1:26 AM, Dragos Tatulea wrote:
On Mon, 2023-08-14 at 18:43 -0700, Si-Wei Liu wrote:
This patch is based on top of the "vdpa/mlx5: Fixes
for ASID handling" series [1].
[1] vdpa/mlx5: Fixes for ASID handling
https://lore.kernel.org/virtualization/20230802171231.110
On 8/14/2023 7:32 PM, Jason Wang wrote:
On Tue, Aug 15, 2023 at 9:45 AM Si-Wei Liu wrote:
Signed-off-by: Si-Wei Liu
---
drivers/vhost/vdpa.c | 17 +
1 file changed, 17 insertions(+)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index b43e868..62b0a01 100644
On 8/14/2023 7:25 PM, Jason Wang wrote:
On Tue, Aug 15, 2023 at 9:45 AM Si-Wei Liu wrote:
Signed-off-by: Si-Wei Liu
---
drivers/vhost/vdpa.c | 16 +++-
include/uapi/linux/vhost_types.h | 2 ++
2 files changed, 17 insertions(+), 1 deletion(-)
diff --git a
On 8/14/2023 7:21 PM, Jason Wang wrote:
On Tue, Aug 15, 2023 at 9:46 AM Si-Wei Liu wrote:
Signed-off-by: Si-Wei Liu
---
include/linux/vdpa.h | 7 +++
1 file changed, 7 insertions(+)
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index db1b0ea..3a3878d 100644
--- a/include
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