At the moment, virtio scsi only register a bank starting at 0. On some
architectures this may not be true and the guest may have multiple
memory region.
Register all the memory regions to vhost by browsing kvm->mem_banks. The
code is based on the virtio_net__vhost_init implementation.
Signed-off-by: Julien Grall <julien.grall@xxxxxxx>
---
This code was not tested as I don't have any setup with scsi.
Changes in v3:
- Don't forget to increment i in the loop.
---
virtio/scsi.c | 21 +++++++++++++--------
1 file changed, 13 insertions(+), 8 deletions(-)
diff --git a/virtio/scsi.c b/virtio/scsi.c
index a429ac8..e541ab5 100644
--- a/virtio/scsi.c
+++ b/virtio/scsi.c
@@ -178,24 +178,29 @@ static struct virtio_ops scsi_dev_virtio_ops = {
static void virtio_scsi_vhost_init(struct kvm *kvm, struct scsi_dev *sdev)
{
+ struct kvm_mem_bank *bank;
struct vhost_memory *mem;
u64 features;
- int r;
+ int r, i;
sdev->vhost_fd = open("/dev/vhost-scsi", O_RDWR);
if (sdev->vhost_fd < 0)
die_perror("Failed openning vhost-scsi device");
- mem = calloc(1, sizeof(*mem) + sizeof(struct vhost_memory_region));
+ mem = calloc(1, sizeof(*mem) + kvm->mem_slots * sizeof(struct vhost_memory_region));
if (mem == NULL)
die("Failed allocating memory for vhost memory map");
- mem->nregions = 1;
- mem->regions[0] = (struct vhost_memory_region) {
- .guest_phys_addr = 0,
- .memory_size = kvm->ram_size,
- .userspace_addr = (unsigned long)kvm->ram_start,
- };
+ i = 0;
+ list_for_each_entry(bank, &kvm->mem_banks, list) {
+ mem->regions[0] = (struct vhost_memory_region) {
+ .guest_phys_addr = bank->guest_phys_addr,
+ .memory_size = bank->size,
+ .userspace_addr = (unsigned long)bank->host_addr,
+ };
+ i++;
+ }
+ mem->nregions = i;
r = ioctl(sdev->vhost_fd, VHOST_SET_OWNER);
if (r != 0)
--
2.11.0
