[RFC,v2,06/12] migration: Skip ROM, non-RAM, and vga.vram memory region during RAM migration

Commit Message

Dov Murik Aug. 23, 2021, 2:16 p.m. UTC

Migrating these memory region hangs the in-guest migration handler.

Signed-off-by: Dov Murik <[e-mail]>
---
 migration/ram.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

Patch

diff --git a/migration/ram.c b/migration/ram.c
index 2d5889f795..f0df6780fb 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -2086,7 +2086,9 @@  static bool encrypted_test_list(RAMState *rs, RAMBlock *block,
     unsigned long gfn;
 
     /* ROM devices contains the unencrypted data */
-    if (memory_region_is_rom(block->mr)) {
+    if (memory_region_is_rom(block->mr) ||
+        memory_region_is_romd(block->mr) ||
+        !memory_region_is_ram(block->mr)) {
         return false;
     }
 
@@ -2098,6 +2100,10 @@  static bool encrypted_test_list(RAMState *rs, RAMBlock *block,
         return false;
     }
 
+    if (!strcmp(memory_region_name(block->mr), "vga.vram")) {
+        return false;
+    }
+
     /*
      * Translate page in ram_addr_t address space to GPA address
      * space using memory region.