* [PATCH] drm/virtio: Align host mapping request to maximum platform page size
@ 2025-01-09 22:07 Sasha Finkelstein via B4 Relay
0 siblings, 0 replies; only message in thread
From: Sasha Finkelstein via B4 Relay @ 2025-01-09 22:07 UTC (permalink / raw)
To: David Airlie, Gerd Hoffmann, Gurchetan Singh, Chia-I Wu,
Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann,
Simona Vetter
Cc: dri-devel, virtualization, linux-kernel, asahi, Sasha Finkelstein
From: Sasha Finkelstein <fnkl.kernel@gmail.com>
This allows running different page sizes between host and guest on
platforms that support mixed page sizes.
Signed-off-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
---
drivers/gpu/drm/virtio/virtgpu_vram.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/virtio/virtgpu_vram.c b/drivers/gpu/drm/virtio/virtgpu_vram.c
index 25df81c027837c248a746e41856b5aa7e216b8d5..8a0577c2170ec9c12cad12be57f9a41c14f04660 100644
--- a/drivers/gpu/drm/virtio/virtgpu_vram.c
+++ b/drivers/gpu/drm/virtio/virtgpu_vram.c
@@ -138,6 +138,12 @@ bool virtio_gpu_is_vram(struct virtio_gpu_object *bo)
return bo->base.base.funcs == &virtio_gpu_vram_funcs;
}
+#if defined(__powerpc64__) || defined(__aarch64__) || defined(__mips__) || defined(__loongarch__)
+#define MAX_PAGE_SIZE 65536
+#else
+#define MAX_PAGE_SIZE PAGE_SIZE
+#endif
+
static int virtio_gpu_vram_map(struct virtio_gpu_object *bo)
{
int ret;
@@ -150,8 +156,8 @@ static int virtio_gpu_vram_map(struct virtio_gpu_object *bo)
return -EINVAL;
spin_lock(&vgdev->host_visible_lock);
- ret = drm_mm_insert_node(&vgdev->host_visible_mm, &vram->vram_node,
- bo->base.base.size);
+ ret = drm_mm_insert_node_generic(&vgdev->host_visible_mm, &vram->vram_node,
+ bo->base.base.size, MAX_PAGE_SIZE, 0, 0);
spin_unlock(&vgdev->host_visible_lock);
if (ret)
---
base-commit: 643e2e259c2b25a2af0ae4c23c6e16586d9fd19c
change-id: 20250109-virtgpu-mixed-page-size-282b8f4a02fc
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