fix comment on cpu_register_physical_memory_offset

We don't require full pages in cpu_register_physical_memory,
except for RAM.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

diff --git a/exec.c b/exec.c
index aafd814..d9be575 100644 (file)
--- a/exec.c
+++ b/exec.c
@@ -2291,8 +2291,9 @@ static void *subpage_init (target_phys_addr_t base, ram_addr_t *phys,
         }                                                               \
     } while (0)
 
-/* register physical memory. 'size' must be a multiple of the target
-   page size. If (phys_offset & ~TARGET_PAGE_MASK) != 0, then it is an
+/* register physical memory.
+   For RAM, 'size' must be a multiple of the target page size.
+   If (phys_offset & ~TARGET_PAGE_MASK) != 0, then it is an
    io memory page.  The address used when calling the IO function is
    the offset from the start of the region, plus region_offset.  Both
    start_addr and region_offset are rounded down to a page boundary