From: Julien Grall <julien.grall@xxxxxxx>
At the moment, virtio scsi registers only one bank starting at 0. On some
architectures (like on x86, for example), this may not be true and the
guest may have multiple memory regions.
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>
Signed-off-by: Alexandru Elisei <alexandru.elisei@xxxxxxx>
---
virtio/scsi.c | 21 +++++++++++++--------
1 file changed, 13 insertions(+), 8 deletions(-)
diff --git a/virtio/scsi.c b/virtio/scsi.c
index a72bb2a9a206..63fc4f4635a2 100644
--- a/virtio/scsi.c
+++ b/virtio/scsi.c
@@ -190,24 +190,29 @@ 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[i] = (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)
--
2.7.4
