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[RFC PATCH 01/13] virtio: Add shared memory capability
From: |
Gurchetan Singh |
Subject: |
[RFC PATCH 01/13] virtio: Add shared memory capability |
Date: |
Thu, 20 Apr 2023 18:12:11 -0700 |
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 247325c193..08ba76fca2 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -1399,6 +1399,24 @@ 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 ab2051b64b..5a3f182f99 100644
--- a/include/hw/virtio/virtio-pci.h
+++ b/include/hw/virtio/virtio-pci.h
@@ -264,4 +264,8 @@ unsigned virtio_pci_optimal_num_queues(unsigned
fixed_queues);
void virtio_pci_set_guest_notifier_fd_handler(VirtIODevice *vdev, VirtQueue
*vq,
int n, bool assign,
bool with_irqfd);
+
+int virtio_pci_add_shm_cap(VirtIOPCIProxy *proxy, uint8_t bar, uint64_t offset,
+ uint64_t length, uint8_t id);
+
#endif
--
2.40.0.634.g4ca3ef3211-goog
- [RFC PATCH 00/13] gfxstream + rutabaga_gfx: a surprising delight or startling epiphany?, Gurchetan Singh, 2023/04/20
- [RFC PATCH 04/13] virtio-gpu: CONTEXT_INIT feature, Gurchetan Singh, 2023/04/20
- [RFC PATCH 05/13] gfxstream + rutabaga prep: virtio_gpu_gl -> virtio_gpu_virgl, Gurchetan Singh, 2023/04/20
- [RFC PATCH 06/13] gfxstream + rutabaga prep: make GL device more library agnostic, Gurchetan Singh, 2023/04/20
- [RFC PATCH 09/13] gfxstream + rutabaga: add required meson changes, Gurchetan Singh, 2023/04/20
- [RFC PATCH 03/13] virtio-gpu blob prep: improve decoding and add memory region, Gurchetan Singh, 2023/04/20
- [RFC PATCH 02/13] virtio-gpu: hostmem, Gurchetan Singh, 2023/04/20
- [RFC PATCH 01/13] virtio: Add shared memory capability,
Gurchetan Singh <=
- [RFC PATCH 10/13] gfxstream + rutabaga: add initial support for gfxstream, Gurchetan Singh, 2023/04/20
- [RFC PATCH 11/13] gfxstream + rutabaga: enable rutabaga, Gurchetan Singh, 2023/04/20
- [RFC PATCH 12/13] HACK: use memory region API to inject memory to guest, Gurchetan Singh, 2023/04/20
- [RFC PATCH 07/13] gfxstream + rutabaga prep: define callbacks in realize function, Gurchetan Singh, 2023/04/20
- [RFC PATCH 08/13] gfxstream + rutabaga prep: added need defintions, fields, and options, Gurchetan Singh, 2023/04/20