search for: virtio_mmio_shm_len_low

Displaying 2 results from an estimated 2 matches for "virtio_mmio_shm_len_low".

2020 Aug 19
0
[PATCH v3 05/18] virtio: Implement get_shm_region for MMIO transport
...ruct virtio_shm_region *region, u8 id) +{ + struct virtio_mmio_device *vm_dev = to_virtio_mmio_device(vdev); + u64 len, addr; + + /* Select the region we're interested in */ + writel(id, vm_dev->base + VIRTIO_MMIO_SHM_SEL); + + /* Read the region size */ + len = (u64) readl(vm_dev->base + VIRTIO_MMIO_SHM_LEN_LOW); + len |= (u64) readl(vm_dev->base + VIRTIO_MMIO_SHM_LEN_HIGH) << 32; + + region->len = len; + + /* Check if region length is -1. If that's the case, the shared memory + * region does not exist and there is no need to proceed further. + */ + if (len == ~(u64)0) + return false; +...
2019 Jul 25
5
[PATCH 0/4] virtio: Add definitions for shared memory regions
From: "Dr. David Alan Gilbert" <dgilbert at redhat.com> Add the virtio shared memory region definitions that have just got merged into the spec. Dr. David Alan Gilbert (4): virtio_pci: Define id field virtio_pci: Define virtio_pci_cap64 virtio_pci: Defined shared memory capability virito_mmio: Define shared memory region registers include/uapi/linux/virtio_mmio.h | 11