| Message ID | 20230312092244.451465-2-ray.huang@amd.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add VirtIO GPU and Passthrough GPU support on Xen | expand |
On 12/3/23 10:22, Huang Rui wrote: > From: "Dr. David Alan Gilbert" <dgilbert@redhat.com> > > 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> > --- > hw/virtio/virtio-pci.c | 18 ++++++++++++++++++ > include/hw/virtio/virtio-pci.h | 4 ++++ > 2 files changed, 22 insertions(+) > > diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c > index a1c9dfa7bb..ae4c29cb96 100644 > --- a/hw/virtio/virtio-pci.c > +++ b/hw/virtio/virtio-pci.c > @@ -1191,6 +1191,24 @@ 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; Why initializing 'cap' using 2 different coding styles? > + return virtio_pci_add_mem_cap(proxy, &cap.cap); > +}
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index a1c9dfa7bb..ae4c29cb96 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -1191,6 +1191,24 @@ 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) { diff --git a/include/hw/virtio/virtio-pci.h b/include/hw/virtio/virtio-pci.h index 938799e8f6..e67fe422a1 100644 --- a/include/hw/virtio/virtio-pci.h +++ b/include/hw/virtio/virtio-pci.h @@ -257,4 +257,8 @@ void virtio_pci_types_register(const VirtioPCIDeviceTypeInfo *t); */ unsigned virtio_pci_optimal_num_queues(unsigned fixed_queues); +int virtio_pci_add_shm_cap(VirtIOPCIProxy *proxy, + uint8_t bar, uint64_t offset, uint64_t length, + uint8_t id); + #endif