From 1cc51e4b535409e634e73267c57972449491232d Mon Sep 17 00:00:00 2001
From: "Michael S. Tsirkin" <mst@redhat.com>
Date: Sun, 18 Feb 2018 19:02:19 -0500
Subject: [PATCH] exec: round up size on MR resize

Block size must fundamentally be a multiple of target page size.
Aligning automatically removes need to worry about the alignment
from callers.

Note: the only caller of qemu_ram_resize (acpi) already happens to have
size padded to a power of 2, but we would like to drop the padding in
ACPI core, and don't want to expose target page size knowledge to ACPI

Backports commit 129ddaf31be583fb7c97812e07e028661005ce42 from qemu
---
 qemu/exec.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/qemu/exec.c b/qemu/exec.c
index ebc88487..c772b73c 100644
--- a/qemu/exec.c
+++ b/qemu/exec.c
@@ -1033,6 +1033,8 @@ int qemu_ram_resize(struct uc_struct *uc, ram_addr_t base, ram_addr_t newsize, E
 
     assert(block);
 
+    newsize = TARGET_PAGE_ALIGN(newsize);
+
     if (block->used_length == newsize) {
         return 0;
     }