On Thu, 30 Jan 2025 12:38:54 -0600, Gaurav Batra wrote:
> iommu_mem_notifier() is invoked when RAM is dynamically added/removed. This
> notifier call is responsible to add/remove TCEs from the Dynamic DMA Window
> (DDW) when TCEs are pre-mapped. TCEs are pre-mapped only for RAM and not
> for persistent memory (pmemory). For DMA buffers in pmemory, TCEs are
> dynamically mapped when the device driver instructs to do so.
>
> The issue is 'daxctl' command is capable of adding pmemory as "System RAM"
> after LPAR boot. The command to do so is -
>
> [...]
Applied to powerpc/next.
[1/1] powerpc/pseries/iommu: memory notifier incorrectly adds TCEs for pmemory
https://git.kernel.org/powerpc/c/6aa989ab2bd0d37540c812b4270006ff794662e7
Thanks
