From: Rafael Barbalho <[email protected]> Page table updates were getting stuck in the CPU cache on chv causing spurious page faults and strange behaviour.
Signed-off-by: Rafael Barbalho <[email protected]> [vsyrjala: Add !HAS_LLC checks] Signed-off-by: Ville Syrjälä <[email protected]> --- drivers/gpu/drm/i915/i915_gem_gtt.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index 3e4d1f0..ba51901 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -267,6 +267,8 @@ static void gen8_ppgtt_clear_range(struct i915_address_space *vm, num_entries--; } + if (!HAS_LLC(ppgtt->base.dev)) + drm_clflush_virt_range(pt_vaddr, PAGE_SIZE); kunmap_atomic(pt_vaddr); pte = 0; @@ -303,6 +305,8 @@ static void gen8_ppgtt_insert_entries(struct i915_address_space *vm, gen8_pte_encode(sg_page_iter_dma_address(&sg_iter), cache_level, true); if (++pte == GEN8_PTES_PER_PAGE) { + if (!HAS_LLC(ppgtt->base.dev)) + drm_clflush_virt_range(pt_vaddr, PAGE_SIZE); kunmap_atomic(pt_vaddr); pt_vaddr = NULL; if (++pde == GEN8_PDES_PER_PAGE) { @@ -312,8 +316,11 @@ static void gen8_ppgtt_insert_entries(struct i915_address_space *vm, pte = 0; } } - if (pt_vaddr) + if (pt_vaddr) { + if (!HAS_LLC(ppgtt->base.dev)) + drm_clflush_virt_range(pt_vaddr, PAGE_SIZE); kunmap_atomic(pt_vaddr); + } } static void gen8_free_page_tables(struct page **pt_pages) @@ -576,6 +583,8 @@ static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt, uint64_t size) pd_vaddr[j] = gen8_pde_encode(ppgtt->base.dev, addr, I915_CACHE_LLC); } + if (!HAS_LLC(ppgtt->base.dev)) + drm_clflush_virt_range(pd_vaddr, PAGE_SIZE); kunmap_atomic(pd_vaddr); } -- 1.8.3.2 _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
