[PATCH v6] pci: read amd iommu virtual address width

[David Marchand]

On Mon, Oct 24, 2022 at 5:35 PM Michael Piszczek <mpiszczek at ddn.com> wrote:
>
> Add code to read the virtual address width for AMD processors.
> Updated pci_device_iommu_support_va() to use glob to find iommu
> capability files.
>
> Signed-off-by: Michael Piszczek <mpiszczek at ddn.com>

Please have a look at the ci.

Unit tests are failing with this patch because the default is changed
from VA to PA.
A quick way to reproduce is to run vdev unit tests as a normal user in
no huge mode.

Before change:
$ DPDK_TEST=vdev_autotest ./build-gcc/app/test/dpdk-test --no-huge -m
2048 --log-level=*:debug
...
EAL: Bus vdev wants IOVA as 'DC'
EAL: Bus pci wants IOVA as 'DC'
EAL: Buses did not request a specific IOVA mode.
EAL: Physical addresses are unavailable, selecting IOVA as VA mode.
EAL: Selected IOVA mode 'VA'

After change:
$ DPDK_TEST=vdev_autotest ./build-gcc/app/test/dpdk-test --no-huge -m
2048 --log-level=*:debug
...
EAL: Bus vdev wants IOVA as 'DC'
EAL: Bus pci wants IOVA as 'PA'
EAL: FATAL: Cannot use IOVA as 'PA' since physical addresses are not available
EAL: Cannot use IOVA as 'PA' since physical addresses are not available


-- 
David Marchand