[RFC QEMU PATCH 13/18] hw/i386/xen/xen-hvm: Introduce xen_ram_block_check function

[Huang Rui]

Introduce xen_ram_block_check function to check whether current ramblock
is xen ram memory.

Signed-off-by: Huang Rui <ray.huang@amd.com>
---
 hw/i386/xen/xen-hvm.c | 15 +++++++++++++++
 include/hw/xen/xen.h  |  1 +
 2 files changed, 16 insertions(+)

diff --git a/hw/i386/xen/xen-hvm.c b/hw/i386/xen/xen-hvm.c
index e4293d6d66..a4f12aefce 100644
--- a/hw/i386/xen/xen-hvm.c
+++ b/hw/i386/xen/xen-hvm.c
@@ -32,6 +32,7 @@
 #include "sysemu/xen.h"
 #include "sysemu/xen-mapcache.h"
 #include "trace.h"
+#include "include/exec/ramblock.h"
 
 #include <xen/hvm/ioreq.h>
 #include <xen/hvm/e820.h>
@@ -1564,6 +1565,20 @@ void xen_register_framebuffer(MemoryRegion *mr)
     framebuffer = mr;
 }
 
+bool xen_ram_block_check(RAMBlock *rb)
+{
+       bool ret;
+
+       if (!rb)
+               return false;
+
+       ret = (rb == ram_memory.ram_block);
+       if (ret)
+               rb->offset = 0;
+
+       return ret;
+}
+
 void xen_shutdown_fatal_error(const char *fmt, ...)
 {
     va_list ap;
diff --git a/include/hw/xen/xen.h b/include/hw/xen/xen.h
index afdf9c436a..99a383eb17 100644
--- a/include/hw/xen/xen.h
+++ b/include/hw/xen/xen.h
@@ -31,5 +31,6 @@ qemu_irq *xen_interrupt_controller_init(void);
 void xenstore_store_pv_console_info(int i, Chardev *chr);
 
 void xen_register_framebuffer(struct MemoryRegion *mr);
+bool xen_ram_block_check(RAMBlock *rb);
 
 #endif /* QEMU_HW_XEN_H */
-- 
2.25.1