On 05/04/2022 11:59, Thomas Hellström wrote:
When DMAR / VT-d is enabled, the display engine uses overfetching,
presumably to deal with the increased latency. To avoid display engine
errors and DMAR faults, as a workaround the GGTT is populated with scatch
PTEs when VT-d is enabled. However start
On Tue, 5 Apr 2022 at 13:00, Thomas Hellström
wrote:
>
> When DMAR / VT-d is enabled, the display engine uses overfetching,
> presumably to deal with the increased latency. To avoid display engine
> errors and DMAR faults, as a workaround the GGTT is populated with scatch
> PTEs when VT-d is enabl
When DMAR / VT-d is enabled, the display engine uses overfetching,
presumably to deal with the increased latency. To avoid display engine
errors and DMAR faults, as a workaround the GGTT is populated with scatch
PTEs when VT-d is enabled. However starting with gen10, Write-combined
writing of scrat
