Re: [PATCH 1/1] iommu/vt-d: Fix incorrect domain ID in context flush helper

[Jerry Snitselaar]

On Thu, Aug 15, 2024 at 08:48:57PM GMT, Lu Baolu wrote:
> The helper intel_context_flush_present() is designed to flush all related
> caches when a context entry with the present bit set is modified. It
> currently retrieves the domain ID from the context entry and uses it to
> flush the IOTLB and context caches. This is incorrect when the context
> entry transitions from present to non-present, as the domain ID field is
> cleared before calling the helper.
> 
> Fix it by passing the domain ID programmed in the context entry before the
> change to intel_context_flush_present(). This ensures that the correct
> domain ID is used for cache invalidation.
> 
> Fixes: f90584f4beb8 ("iommu/vt-d: Add helper to flush caches for context change")
> Reported-by: Alex Williamson <alex.williamson@xxxxxxxxxx>
> Closes: https://lore.kernel.org/linux-iommu/20240814162726.5efe1a6e.alex.williamson@xxxxxxxxxx/
> Signed-off-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>

Joerg,

Can this go into a fixes pr for 6.11?

Regards,
Jerry