On 2022/11/1 12:21, Nicolin Chen wrote:
On Tue, Nov 01, 2022 at 11:04:38AM +0800, Yi Liu wrote:
On 2022/11/1 07:24, Jason Gunthorpe wrote:
On Mon, Oct 31, 2022 at 08:25:39PM +0800, Yi Liu wrote:
There is something wrong with the test suite that it isn't covering
the above, I'm going to look into that today.
sounds to be the cause. I didn't see any significant change in vfio_main.c
that may fail gvt. So should the iommufd changes. Then we will re-run the
test after your update.:-)
I updated the github with all the changes made so far, it is worth
trying again!
gvt is still failing with below call trace in host side. vfio_unpin_pages()
is still in problem. Any idea on it?
[ 206.464318] WARNING: CPU: 9 PID: 3362 at
drivers/iommu/iommufd/device.c:591 iommufd_access_pin_pages+0x337/0x360
Judging from this WARNING, and since gvt (mdev) needs pin_pages(),
I assume this might be a fix, though Jason's latest change for the
iova_alignment seems to be added for CONFIG_IOMMUFD_TEST only.
------
diff --git a/drivers/vfio/iommufd.c b/drivers/vfio/iommufd.c
index 72a289c5f8c9..185075528d5e 100644
--- a/drivers/vfio/iommufd.c
+++ b/drivers/vfio/iommufd.c
@@ -120,6 +120,7 @@ static void vfio_emulated_unmap(void *data, unsigned long iova,
}
static const struct iommufd_access_ops vfio_user_ops = {
+ .needs_pin_pages = 1,
.unmap = vfio_emulated_unmap,
};
------
Perhaps you can try it first to see if we can test the rest part of
the routine for now, till Jason acks tomorrow.
fyi. it works so far. :-)
--
Regards,
Yi Liu
