On Wed, Nov 10, 2021 at 05:42:19PM +0100, Antonio Caggiano wrote:
> From: Gerd Hoffmann <kra...@redhat.com>
>
> Use VIRTIO_GPU_SHM_ID_HOST_VISIBLE as id for virtio-gpu.
>
> Signed-off-by: Antonio Caggiano <antonio.caggi...@collabora.com>
I guess Gerd can apply this as appropriate.
Acked-by: Michael S. Tsirkin <m...@redhat.com>
> ---
> hw/display/virtio-gpu-pci.c | 14 ++++++++++++++
> hw/display/virtio-gpu.c | 1 +
> hw/display/virtio-vga.c | 32 +++++++++++++++++++++++---------
> include/hw/virtio/virtio-gpu.h | 5 +++++
> 4 files changed, 43 insertions(+), 9 deletions(-)
>
> diff --git a/hw/display/virtio-gpu-pci.c b/hw/display/virtio-gpu-pci.c
> index e36eee0c40..a79bd751b2 100644
> --- a/hw/display/virtio-gpu-pci.c
> +++ b/hw/display/virtio-gpu-pci.c
> @@ -33,6 +33,20 @@ static void virtio_gpu_pci_base_realize(VirtIOPCIProxy
> *vpci_dev, Error **errp)
> DeviceState *vdev = DEVICE(g);
> int i;
>
> + if (virtio_gpu_hostmem_enabled(g->conf)) {
> + vpci_dev->msix_bar_idx = 1;
> + vpci_dev->modern_mem_bar_idx = 2;
> + memory_region_init(&g->hostmem, OBJECT(g), "virtio-gpu-hostmem",
> + g->conf.hostmem);
> + pci_register_bar(&vpci_dev->pci_dev, 4,
> + PCI_BASE_ADDRESS_SPACE_MEMORY |
> + PCI_BASE_ADDRESS_MEM_PREFETCH |
> + PCI_BASE_ADDRESS_MEM_TYPE_64,
> + &g->hostmem);
> + virtio_pci_add_shm_cap(vpci_dev, 4, 0, g->conf.hostmem,
> VIRTIO_GPU_SHM_ID_HOST_VISIBLE);
> + }
> +
> + qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus), errp);
> virtio_pci_force_virtio_1(vpci_dev);
> if (!qdev_realize(vdev, BUS(&vpci_dev->bus), errp)) {
> return;
> diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
> index d78b9700c7..1cfcb81c1b 100644
> --- a/hw/display/virtio-gpu.c
> +++ b/hw/display/virtio-gpu.c
> @@ -1418,6 +1418,7 @@ static Property virtio_gpu_properties[] = {
> 256 * MiB),
> DEFINE_PROP_BIT("blob", VirtIOGPU, parent_obj.conf.flags,
> VIRTIO_GPU_FLAG_BLOB_ENABLED, false),
> + DEFINE_PROP_SIZE("hostmem", VirtIOGPU, parent_obj.conf.hostmem, 0),
> DEFINE_PROP_END_OF_LIST(),
> };
>
> diff --git a/hw/display/virtio-vga.c b/hw/display/virtio-vga.c
> index 9e57f61e9e..ca841a0799 100644
> --- a/hw/display/virtio-vga.c
> +++ b/hw/display/virtio-vga.c
> @@ -125,16 +125,30 @@ static void virtio_vga_base_realize(VirtIOPCIProxy
> *vpci_dev, Error **errp)
> pci_register_bar(&vpci_dev->pci_dev, 0,
> PCI_BASE_ADDRESS_MEM_PREFETCH, &vga->vram);
>
> - /*
> - * Configure virtio bar and regions
> - *
> - * We use bar #2 for the mmio regions, to be compatible with stdvga.
> - * virtio regions are moved to the end of bar #2, to make room for
> - * the stdvga mmio registers at the start of bar #2.
> - */
> - vpci_dev->modern_mem_bar_idx = 2;
> - vpci_dev->msix_bar_idx = 4;
> vpci_dev->modern_io_bar_idx = 5;
> +
> + if (!virtio_gpu_hostmem_enabled(g->conf)) {
> + /*
> + * Configure virtio bar and regions
> + *
> + * We use bar #2 for the mmio regions, to be compatible with stdvga.
> + * virtio regions are moved to the end of bar #2, to make room for
> + * the stdvga mmio registers at the start of bar #2.
> + */
> + vpci_dev->modern_mem_bar_idx = 2;
> + vpci_dev->msix_bar_idx = 4;
> + } else {
> + vpci_dev->msix_bar_idx = 1;
> + vpci_dev->modern_mem_bar_idx = 2;
> + memory_region_init(&g->hostmem, OBJECT(g), "virtio-gpu-hostmem",
> + g->conf.hostmem);
> + pci_register_bar(&vpci_dev->pci_dev, 4,
> + PCI_BASE_ADDRESS_SPACE_MEMORY |
> + PCI_BASE_ADDRESS_MEM_PREFETCH |
> + PCI_BASE_ADDRESS_MEM_TYPE_64,
> + &g->hostmem);
> + virtio_pci_add_shm_cap(vpci_dev, 4, 0, g->conf.hostmem,
> VIRTIO_GPU_SHM_ID_HOST_VISIBLE);
> + }
>
> if (!(vpci_dev->flags & VIRTIO_PCI_FLAG_PAGE_PER_VQ)) {
> /*
> diff --git a/include/hw/virtio/virtio-gpu.h b/include/hw/virtio/virtio-gpu.h
> index acfba7c76c..3963cb4f86 100644
> --- a/include/hw/virtio/virtio-gpu.h
> +++ b/include/hw/virtio/virtio-gpu.h
> @@ -102,12 +102,15 @@ enum virtio_gpu_base_conf_flags {
> (_cfg.flags & (1 << VIRTIO_GPU_FLAG_DMABUF_ENABLED))
> #define virtio_gpu_blob_enabled(_cfg) \
> (_cfg.flags & (1 << VIRTIO_GPU_FLAG_BLOB_ENABLED))
> +#define virtio_gpu_hostmem_enabled(_cfg) \
> + (_cfg.hostmem > 0)
>
Don't much like the lower-case macro here, but I guess it's
consistent with rest of the code.
> struct virtio_gpu_base_conf {
> uint32_t max_outputs;
> uint32_t flags;
> uint32_t xres;
> uint32_t yres;
> + uint64_t hostmem;
> };
>
> struct virtio_gpu_ctrl_command {
> @@ -131,6 +134,8 @@ struct VirtIOGPUBase {
> int renderer_blocked;
> int enable;
>
> + MemoryRegion hostmem;
> +
> struct virtio_gpu_scanout scanout[VIRTIO_GPU_MAX_SCANOUTS];
>
> int enabled_output_bitmask;
> --
> 2.32.0
