On 25-Jul-19 10:38 AM, Burakov, Anatoly wrote:
On 25-Jul-19 10:35 AM, David Marchand wrote:
On Thu, Jul 25, 2019 at 11:31 AM Burakov, Anatoly
<anatoly.bura...@intel.com> wrote:
On 25-Jul-19 9:05 AM, David Marchand wrote:
On Wed, Jul 24, 2019 at 6:46 PM Anatoly Burakov
<anatoly.bura...@intel.com> wrote:
When IOMMU is not available, /sys/kernel/iommu_groups will not be
populated. This is happening since at least 3.6 when VFIO support
was added. If the directory is empty, EAL should not pick IOVA as
VA as the default IOVA mode.
We also assume that VFIO equals IOMMU, so if VFIO support is not
compiled, we always assume IOMMU support is not available.
Not sure I agree with this statement.
What about unknown (from eal pov) kernel drivers?
Are there any cases where we can use IOVA as VA mode without having VFIO
compiled?
If a pmd relies on a kernel driver we don't know in EAL.
This is not the case afaik, but I'd prefer we don't mix vfio and iommu.
OK, i can drop that.
By the way, would kernel report IOMMU groups in that case? As in, would
/sys/kernel/iommu_groups be populated?
--
Thanks,
Anatoly
