On Thu, 18 Jul 2024 11:33:23 +0530, Maulik Shah wrote:
> Linux does not write into cmd-db region. This region of memory is write
> protected by XPU. XPU may sometime falsely detect clean cache eviction
> as "write" into the write protected region leading to secure interrupt
> which causes an endless loop somewhere in Trust Zone.
>
> The only reason it is working right now is because Qualcomm Hypervisor
> maps the same region as Non-Cacheable memory in Stage 2 translation
> tables. The issue manifests if we want to use another hypervisor (like
> Xen or KVM), which does not know anything about those specific mappings.
>
> [...]
Applied, thanks!
[1/1] soc: qcom: cmd-db: Map shared memory as WC, not WB
commit: f9bb896eab221618927ae6a2f1d566567999839d
Best regards,
--
Bjorn Andersson <andersson@xxxxxxxxxx>
