[Qemu-devel] [PULL v2 5/7] vhost-user: Fix VHOST_SET_MEM_TABLE processing

["Michael S. Tsirkin" <mst@redhat.com>]

From: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>

qemu_get_ram_fd doesn't accept a guest physical address. ram_addr_t are
opaque values that are assigned in qemu_ram_alloc.

Find the ram_addr_t corresponding to the userspace_addr using qemu_ram_addr_from_host,
and then call qemu_get_ram_fd on it.

Thanks to Paolo Bonzini <pbonzini@redhat.com>

Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/virtio/vhost-user.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c
index 38e5806..3d23218 100644
--- a/hw/virtio/vhost-user.c
+++ b/hw/virtio/vhost-user.c
@@ -216,7 +216,9 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
     case VHOST_SET_MEM_TABLE:
         for (i = 0; i < dev->mem->nregions; ++i) {
             struct vhost_memory_region *reg = dev->mem->regions + i;
-            fd = qemu_get_ram_fd(reg->guest_phys_addr);
+            ram_addr_t ram_addr;
+            qemu_ram_addr_from_host((void *)reg->userspace_addr, &ram_addr);
+            fd = qemu_get_ram_fd(ram_addr);
             if (fd > 0) {
                 msg.memory.regions[fd_num].userspace_addr = reg->userspace_addr;
                 msg.memory.regions[fd_num].memory_size  = reg->memory_size;
-- 
MST