Il 08/07/2014 16:06, Nikolay Nikolaev ha scritto:
@@ -216,6 +216,10 @@ 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;
+ if (!qemu_is_ram_block(reg->guest_phys_addr)) {
+ /* this is non-RAM region - skip it */
+ continue;
+ }
fd = qemu_get_ram_fd(reg->guest_phys_addr);
if (fd > 0) {
msg.memory.regions[fd_num].userspace_addr =
reg->userspace_addr;
This is wrong. qemu_get_ram_fd doesn't accept a guest physical address.
ram_addr_t are opaque values that are assigned in qemu_ram_alloc.
In fact, RAM regions are filtered by
static bool vhost_section(MemoryRegionSection *section)
{
return memory_region_is_ram(section->mr);
}
You can 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.
Paolo
