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postcopy+vhost-user: Split set_mem_table for postcopy

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Split the set_mem_table routines in both qemu and libvhost-user
because the postcopy versions are going to be quite different
once changes in the later patches are added. However, this patch
doesn't produce any functional change, just the split.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Dr. David Alan Gilbert 2018-03-12 17:21:07 +00:00 • committed by Michael S. Tsirkin
parent 6864a7b5ac
commit 55d754b307
2 changed files with 130 additions and 4 deletions
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53
contrib/libvhost-user/libvhost-user.c
View file

@ -448,6 +448,55 @@ vu_reset_device_exec(VuDev *dev, VhostUserMsg *vmsg)
return false;
}
static bool
vu_set_mem_table_exec_postcopy(VuDev *dev, VhostUserMsg *vmsg)
{
int i;
VhostUserMemory *memory = &vmsg->payload.memory;
dev->nregions = memory->nregions;
/* TODO: Postcopy specific code */
DPRINT("Nregions: %d\n", memory->nregions);
for (i = 0; i < dev->nregions; i++) {
void *mmap_addr;
VhostUserMemoryRegion *msg_region = &memory->regions[i];
VuDevRegion *dev_region = &dev->regions[i];
DPRINT("Region %d\n", i);
DPRINT(" guest_phys_addr: 0x%016"PRIx64"\n",
msg_region->guest_phys_addr);
DPRINT(" memory_size: 0x%016"PRIx64"\n",
msg_region->memory_size);
DPRINT(" userspace_addr 0x%016"PRIx64"\n",
msg_region->userspace_addr);
DPRINT(" mmap_offset 0x%016"PRIx64"\n",
msg_region->mmap_offset);
dev_region->gpa = msg_region->guest_phys_addr;
dev_region->size = msg_region->memory_size;
dev_region->qva = msg_region->userspace_addr;
dev_region->mmap_offset = msg_region->mmap_offset;
/* We don't use offset argument of mmap() since the
* mapped address has to be page aligned, and we use huge
* pages. */
mmap_addr = mmap(0, dev_region->size + dev_region->mmap_offset,
PROT_READ | PROT_WRITE, MAP_SHARED,
vmsg->fds[i], 0);
if (mmap_addr == MAP_FAILED) {
vu_panic(dev, "region mmap error: %s", strerror(errno));
} else {
dev_region->mmap_addr = (uint64_t)(uintptr_t)mmap_addr;
DPRINT(" mmap_addr: 0x%016"PRIx64"\n",
dev_region->mmap_addr);
}
close(vmsg->fds[i]);
}
return false;
}
static bool
vu_set_mem_table_exec(VuDev *dev, VhostUserMsg *vmsg)
{
@ -464,6 +513,10 @@ vu_set_mem_table_exec(VuDev *dev, VhostUserMsg *vmsg)
}
dev->nregions = memory->nregions;
if (dev->postcopy_listening) {
return vu_set_mem_table_exec_postcopy(dev, vmsg);
}
DPRINT("Nregions: %d\n", memory->nregions);
for (i = 0; i < dev->nregions; i++) {
void *mmap_addr;