multifd: recv side only needs the RAMBlock host address

So we can remove the MultiFDPages.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

migration/multifd-zlib.c

@@ -253,7 +253,7 @@ static int zlib_recv_pages(MultiFDRecvParams *p, Error **errp)
         }
 
         zs->avail_out = page_size;
-        zs->next_out = p->pages->block->host + p->normal[i];
+        zs->next_out = p->host + p->normal[i];
 
         /*
          * Welcome to inflate semantics

migration/multifd-zstd.c

@@ -264,7 +264,7 @@ static int zstd_recv_pages(MultiFDRecvParams *p, Error **errp)
     z->in.pos = 0;
 
     for (i = 0; i < p->normal_num; i++) {
-        z->out.dst = p->pages->block->host + p->normal[i];
+        z->out.dst = p->host + p->normal[i];
         z->out.size = page_size;
         z->out.pos = 0;
 

migration/multifd.c

@@ -147,7 +147,7 @@ static int nocomp_recv_pages(MultiFDRecvParams *p, Error **errp)
         return -1;
     }
     for (int i = 0; i < p->normal_num; i++) {
-        p->iov[i].iov_base = p->pages->block->host + p->normal[i];
+        p->iov[i].iov_base = p->host + p->normal[i];
         p->iov[i].iov_len = page_size;
     }
     return qio_channel_readv_all(p->c, p->iov, p->normal_num, errp);
@@ -340,7 +340,7 @@ static int multifd_recv_unfill_packet(MultiFDRecvParams *p, Error **errp)
         return -1;
     }
 
-    p->pages->block = block;
+    p->host = block->host;
     for (i = 0; i < p->normal_num; i++) {
         uint64_t offset = be64_to_cpu(packet->offset[i]);
 
@@ -1007,8 +1007,6 @@ int multifd_load_cleanup(Error **errp)
         qemu_sem_destroy(&p->sem_sync);
         g_free(p->name);
         p->name = NULL;
-        multifd_pages_clear(p->pages);
-        p->pages = NULL;
         p->packet_len = 0;
         g_free(p->packet);
         p->packet = NULL;
@@ -1149,7 +1147,6 @@ int multifd_load_setup(Error **errp)
         qemu_sem_init(&p->sem_sync, 0);
         p->quit = false;
         p->id = i;
-        p->pages = multifd_pages_init(page_count);
         p->packet_len = sizeof(MultiFDPacket_t)
                       + sizeof(uint64_t) * page_count;
         p->packet = g_malloc0(p->packet_len);

migration/multifd.h

@@ -136,8 +136,8 @@ typedef struct {
     bool running;
     /* should this thread finish */
     bool quit;
-    /* array of pages to receive */
-    MultiFDPages_t *pages;
+    /* ramblock host address */
+    uint8_t *host;
     /* packet allocated len */
     uint32_t packet_len;
     /* pointer to the packet */