Hi all,
On Tue, 13 Oct 2020 18:31:07 +1100 Stephen Rothwell <s...@canb.auug.org.au>
wrote:
>
> On Mon, 21 Sep 2020 14:09:01 +1000 Stephen Rothwell <s...@canb.auug.org.au>
> wrote:
> >
> > After merging the iommu tree, today's linux-next build (arm
> > multi_v7_defconfig) failed like this:
> >
> > drivers/gpu/drm/msm/msm_iommu.c: In function 'msm_iommu_pagetable_unmap':
> > drivers/gpu/drm/msm/msm_iommu.c:46:2: error: implicit declaration of
> > function 'iommu_flush_tlb_all'; did you mean 'iommu_flush_iotlb_all'?
> > [-Werror=implicit-function-declaration]
> > 46 | iommu_flush_tlb_all(to_msm_iommu(pagetable->parent)->domain);
> > | ^~~~~~~~~~~~~~~~~~~
> > | iommu_flush_iotlb_all
> >
> > Caused by commit
> >
> > aae4c8e27bd7 ("iommu: Rename iommu_tlb_* functions to iommu_iotlb_*")
> >
> > interacting with commit
> >
> > b145c6e65eb0 ("drm/msm: Add support to create a local pagetable")
> >
> > from the drm-msm tree.
> >
> > I have applied the following merge fix patch. Someone will need to tell
> > Linus about this fix up when the trees get merged.
> >
> > From: Stephen Rothwell <s...@canb.auug.org.au>
> > Date: Mon, 21 Sep 2020 14:04:14 +1000
> > Subject: [PATCH] merge fix upt for iommu_flush_iotlb_all() rename
> >
> > Signed-off-by: Stephen Rothwell <s...@canb.auug.org.au>
> > ---
> > drivers/gpu/drm/msm/msm_iommu.c | 4 ++--
> > 1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/msm/msm_iommu.c
> > b/drivers/gpu/drm/msm/msm_iommu.c
> > index 3a83ffdb3b90..22ac7c692a81 100644
> > --- a/drivers/gpu/drm/msm/msm_iommu.c
> > +++ b/drivers/gpu/drm/msm/msm_iommu.c
> > @@ -43,7 +43,7 @@ static int msm_iommu_pagetable_unmap(struct msm_mmu *mmu,
> > u64 iova,
> > size -= 4096;
> > }
> >
> > - iommu_flush_tlb_all(to_msm_iommu(pagetable->parent)->domain);
> > + iommu_flush_iotlb_all(to_msm_iommu(pagetable->parent)->domain);
> >
> > return (unmapped == size) ? 0 : -EINVAL;
> > }
> > @@ -199,7 +199,7 @@ struct msm_mmu *msm_iommu_pagetable_create(struct
> > msm_mmu *parent)
> >
> > /*
> > * TODO we would like each set of page tables to have a unique ASID
> > - * to optimize TLB invalidation. But iommu_flush_tlb_all() will
> > + * to optimize TLB invalidation. But iommu_flush_iotlb_all() will
> > * end up flushing the ASID used for TTBR1 pagetables, which is not
> > * what we want. So for now just use the same ASID as TTBR1.
> > */
> > --
> > 2.28.0
>
> This merge fix up is now needed when the iommu tree and the drm tree are
> merged.This merge fix up is now needed when the drm tree is merged with Linus' tree. -- Cheers, Stephen Rothwell
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