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drm/etnaviv: block 64K of address space behind each cmdstream

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To make sure we don't place anything there which might confuse
the FE prefetcher. This gets rid of another case of FE MMU faults
when the address space gets crowded before triggering the reaper.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
This commit is contained in:
Lucas Stach 2016-10-06 17:03:28 +02:00
parent 8c136b590f
commit 8814d2dce0
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/etnaviv/etnaviv_mmu.c
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@ -330,7 +330,8 @@ u32 etnaviv_iommu_get_cmdbuf_va(struct etnaviv_gpu *gpu,
return (u32)buf->vram_node.start;
mutex_lock(&mmu->lock);
ret = etnaviv_iommu_find_iova(mmu, &buf->vram_node, buf->size);
ret = etnaviv_iommu_find_iova(mmu, &buf->vram_node,
buf->size + SZ_64K);
if (ret < 0) {
mutex_unlock(&mmu->lock);
return 0;