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accel/ivpu: Add set_pages_array_wc/uc for internal buffers

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commit 1963546390 upstream.

Buffers mapped with pgprot_writecombined() are not correctly
flushed. This triggers issues on VPU access using random
memory content such as MMU translation faults, invalid context
descriptors being fetched and can lead to VPU FW crashes.

Fixes: 647371a660 ("accel/ivpu: Add GEM buffer object management")
Cc: stable@vger.kernel.org # 6.3+
Signed-off-by: Karol Wachowski <karol.wachowski@linux.intel.com>
Reviewed-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Signed-off-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230802063735.3005291-1-stanislaw.gruszka@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Karol Wachowski 2023-08-02 08:37:35 +02:00 committed by Greg Kroah-Hartman
parent 5828d5f5dc
commit 4747cc4042
1 changed files with 8 additions and 0 deletions
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8
drivers/accel/ivpu/ivpu_gem.c
View file

@ -173,6 +173,9 @@ static void internal_free_pages_locked(struct ivpu_bo *bo)
{
unsigned int i, npages = bo->base.size >> PAGE_SHIFT;
if (ivpu_bo_cache_mode(bo) != DRM_IVPU_BO_CACHED)
set_pages_array_wb(bo->pages, bo->base.size >> PAGE_SHIFT);
for (i = 0; i < npages; i++)
put_page(bo->pages[i]);
@ -587,6 +590,11 @@ ivpu_bo_alloc_internal(struct ivpu_device *vdev, u64 vpu_addr, u64 size, u32 fla
if (ivpu_bo_cache_mode(bo) != DRM_IVPU_BO_CACHED)
drm_clflush_pages(bo->pages, bo->base.size >> PAGE_SHIFT);
if (bo->flags & DRM_IVPU_BO_WC)
set_pages_array_wc(bo->pages, bo->base.size >> PAGE_SHIFT);
else if (bo->flags & DRM_IVPU_BO_UNCACHED)
set_pages_array_uc(bo->pages, bo->base.size >> PAGE_SHIFT);
prot = ivpu_bo_pgprot(bo, PAGE_KERNEL);
bo->kvaddr = vmap(bo->pages, bo->base.size >> PAGE_SHIFT, VM_MAP, prot);
if (!bo->kvaddr) {