Re: [PATCH] iommu/vt-d: remove global page flush support

[Joerg Roedel <joro@8bytes.org>]

Hi Jacob,

On Tue, Aug 20, 2019 at 02:21:08PM -0700, Jacob Pan wrote:
> Global pages support is removed from VT-d spec 3.0. Since global pages G
> flag only affects first-level paging structures and because DMA request
> with PASID are only supported by VT-d spec. 3.0 and onward, we can
> safely remove global pages support.
> 
> For kernel shared virtual address IOTLB invalidation, PASID
> granularity and page selective within PASID will be used. There is
> no global granularity supported. Without this fix, IOTLB invalidation
> will cause invalid descriptor error in the queued invalidation (QI)
> interface.
> 
> Reported-by:   Sanjay K Kumar <sanjay.k.kumar@intel.com>
> Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
> ---
>  drivers/iommu/intel-svm.c   | 36 +++++++++++++++---------------------
>  include/linux/intel-iommu.h |  3 ---
>  2 files changed, 15 insertions(+), 24 deletions(-)

Does not cleanly apply to v5.3-rc5, can you please rebase it and
re-send? Also, is this v5.3 stuff (in that case please add a Fixes tag)
or can it wait for v5.4?

Regards,

	Joerg