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| author | Dr. David Alan Gilbert <dgilbert@redhat.com> | 2023-05-04 12:12:42 -0700 |
|---|---|---|
| committer | Marc-André Lureau <marcandre.lureau@redhat.com> | 2023-10-16 11:29:56 +0400 |
| commit | 605a16a7621c139f7e112538d7773bb60108cef7 (patch) | |
| tree | 6d1b8d2625e45628acba11115b9bd8b34f34aa97 /hw | |
| parent | 63011373ad22c794a013da69663c03f1297a5c56 (diff) | |
| download | qemu-605a16a7621c139f7e112538d7773bb60108cef7.zip qemu-605a16a7621c139f7e112538d7773bb60108cef7.tar.gz qemu-605a16a7621c139f7e112538d7773bb60108cef7.tar.bz2 | |
virtio: Add shared memory capability
Define a new capability type 'VIRTIO_PCI_CAP_SHARED_MEMORY_CFG' to allow
defining shared memory regions with sizes and offsets of 2^32 and more.
Multiple instances of the capability are allowed and distinguished
by a device-specific 'id'.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Antonio Caggiano <antonio.caggiano@collabora.com>
Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
Tested-by: Alyssa Ross <hi@alyssa.is>
Tested-by: Huang Rui <ray.huang@amd.com>
Tested-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Acked-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/virtio/virtio-pci.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index abebd00..af1f4bc 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -1435,6 +1435,24 @@ static int virtio_pci_add_mem_cap(VirtIOPCIProxy *proxy, return offset; } +int virtio_pci_add_shm_cap(VirtIOPCIProxy *proxy, + uint8_t bar, uint64_t offset, uint64_t length, + uint8_t id) +{ + struct virtio_pci_cap64 cap = { + .cap.cap_len = sizeof cap, + .cap.cfg_type = VIRTIO_PCI_CAP_SHARED_MEMORY_CFG, + }; + + cap.cap.bar = bar; + cap.cap.length = cpu_to_le32(length); + cap.length_hi = cpu_to_le32(length >> 32); + cap.cap.offset = cpu_to_le32(offset); + cap.offset_hi = cpu_to_le32(offset >> 32); + cap.cap.id = id; + return virtio_pci_add_mem_cap(proxy, &cap.cap); +} + static uint64_t virtio_pci_common_read(void *opaque, hwaddr addr, unsigned size) { |