From 12267f831fa6fe679019d09c48089941908b7cf3 Mon Sep 17 00:00:00 2001 From: Marcin Bernatowicz Date: Thu, 14 Aug 2025 16:59:50 +0200 Subject: [PATCH] drm/xe/tests: Make cross-device dma-buf BOs CPU-visible on small BAR MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Small-BAR systems (e.g., SR-IOV VFs in VMs) expose only a subset of VRAM via PCI/BAR. Exporting a BO outside that window fails, and the selftests also do CPU fill/verify. Set XE_BO_FLAG_NEEDS_CPU_ACCESS for cross-device variants to force CPU-mappable placement and keep tests reliable. Large-BAR/P2P setups are unaffected. Suggested-by: Matthew Auld Signed-off-by: Marcin Bernatowicz Cc: Matthew Auld Reviewed-by: Matthew Auld Link: https://lore.kernel.org/r/20250814145950.430231-1-marcin.bernatowicz@linux.intel.com Signed-off-by: Michał Winiarski --- drivers/gpu/drm/xe/tests/xe_dma_buf.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/xe/tests/xe_dma_buf.c b/drivers/gpu/drm/xe/tests/xe_dma_buf.c index cde9530bef8c4..3c5ad8cc65a04 100644 --- a/drivers/gpu/drm/xe/tests/xe_dma_buf.c +++ b/drivers/gpu/drm/xe/tests/xe_dma_buf.c @@ -204,7 +204,7 @@ static const struct dma_buf_attach_ops nop2p_attach_ops = { static const struct dma_buf_test_params test_params[] = { {.mem_mask = XE_BO_FLAG_VRAM0, .attach_ops = &xe_dma_buf_attach_ops}, - {.mem_mask = XE_BO_FLAG_VRAM0, + {.mem_mask = XE_BO_FLAG_VRAM0 | XE_BO_FLAG_NEEDS_CPU_ACCESS, .attach_ops = &xe_dma_buf_attach_ops, .force_different_devices = true}, @@ -236,7 +236,8 @@ static const struct dma_buf_test_params test_params[] = { {.mem_mask = XE_BO_FLAG_SYSTEM | XE_BO_FLAG_VRAM0, .attach_ops = &xe_dma_buf_attach_ops}, - {.mem_mask = XE_BO_FLAG_SYSTEM | XE_BO_FLAG_VRAM0, + {.mem_mask = XE_BO_FLAG_SYSTEM | XE_BO_FLAG_VRAM0 | + XE_BO_FLAG_NEEDS_CPU_ACCESS, .attach_ops = &xe_dma_buf_attach_ops, .force_different_devices = true}, -- 2.47.3