[Qemu-devel] [PATCH v9 49/56] Round up RAMBlock sizes to host page sizes

[Dr. David Alan Gilbert (git)]

From: "Dr. David Alan Gilbert" <address@hidden>

RAMBlocks that are not a multiple of host pages in length
cause problems for postcopy (I've seen an ACPI table on aarch64
be 5k in length - i.e. 5x target-page), so round RAMBlock sizes
up to a host-page.

This potentially breaks migration compatibility due to changes
in RAMBlock sizes; however:
   1) x86 and s390 I think always have host=target page size
   2) When I've tried on Power the block sizes already seem aligned.
   3) I don't think there's anything else that maintains per-version
      machine-types for compatibility.

Signed-off-by: Dr. David Alan Gilbert <address@hidden>
Reviewed-by: Juan Quintela <address@hidden>
---
 exec.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/exec.c b/exec.c
index f8aad39..065096a 100644
--- a/exec.c
+++ b/exec.c
@@ -1450,7 +1450,7 @@ int qemu_ram_resize(ram_addr_t base, ram_addr_t newsize, 
Error **errp)
 
     assert(block);
 
-    newsize = TARGET_PAGE_ALIGN(newsize);
+    newsize = HOST_PAGE_ALIGN(newsize);
 
     if (block->used_length == newsize) {
         return 0;
@@ -1594,7 +1594,7 @@ ram_addr_t qemu_ram_alloc_from_file(ram_addr_t size, 
MemoryRegion *mr,
         return -1;
     }
 
-    size = TARGET_PAGE_ALIGN(size);
+    size = HOST_PAGE_ALIGN(size);
     new_block = g_malloc0(sizeof(*new_block));
     new_block->mr = mr;
     new_block->used_length = size;
@@ -1630,8 +1630,8 @@ ram_addr_t qemu_ram_alloc_internal(ram_addr_t size, 
ram_addr_t max_size,
     ram_addr_t addr;
     Error *local_err = NULL;
 
-    size = TARGET_PAGE_ALIGN(size);
-    max_size = TARGET_PAGE_ALIGN(max_size);
+    size = HOST_PAGE_ALIGN(size);
+    max_size = HOST_PAGE_ALIGN(max_size);
     new_block = g_malloc0(sizeof(*new_block));
     new_block->mr = mr;
     new_block->resized = resized;
-- 
2.5.0