[Qemu-devel] [PATCH 2/4] Use 64bit pointer for dirty log

[Alexander Graf <agraf@suse.de>]

Dirty logs currently get written with native "long" size. On little endian
it doesn't matter if we use uint64_t instead though, because we'd still end
up using the right bytes.

On big endian, this does become a bigger problem, so we need to ensure that
kernel and userspace talk the same language, which means getting rid of "long"
and using a defined size instead.

So I decided to use 64 bit types at all times. This doesn't break existing
targets but will in conjunction with a patch I'll send to the KVM ML make
dirty logs work with 32 bit userspace on 64 kernel with big endian.

Signed-off-by: Alexander Graf <agraf@suse.de>
---
 kvm-all.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kvm-all.c b/kvm-all.c
index 824bb4c..9d02ce3 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -357,7 +357,7 @@ int kvm_physical_sync_dirty_bitmap(target_phys_addr_t start_addr,
         for (phys_addr = mem->start_addr, addr = mem->phys_offset;
              phys_addr < mem->start_addr + mem->memory_size;
              phys_addr += TARGET_PAGE_SIZE, addr += TARGET_PAGE_SIZE) {
-            unsigned long *bitmap = (unsigned long *)d.dirty_bitmap;
+            uint64_t *bitmap = (uint64_t *)d.dirty_bitmap;
             unsigned nr = (phys_addr - mem->start_addr) >> TARGET_PAGE_BITS;
             unsigned word = nr / (sizeof(*bitmap) * 8);
             unsigned bit = nr % (sizeof(*bitmap) * 8);
-- 
1.6.0.2