[Qemu-devel] [PATCH 1/3] Add qemu_is_ram_block

[Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>]

This function will check if given address maps into a RAMBlock.

Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>
---
 exec.c                  |   15 +++++++++++++++
 include/exec/ram_addr.h |    1 +
 2 files changed, 16 insertions(+)

diff --git a/exec.c b/exec.c
index 5a2a25e..0b1457b 100644
--- a/exec.c
+++ b/exec.c
@@ -743,6 +743,21 @@ void cpu_abort(CPUState *cpu, const char *fmt, ...)
 }
 
 #if !defined(CONFIG_USER_ONLY)
+bool qemu_is_ram_block(ram_addr_t addr)
+{
+    RAMBlock *block;
+    bool found = false;
+
+    QTAILQ_FOREACH(block, &ram_list.blocks, next) {
+        if (addr - block->offset < block->length) {
+            found = true;
+            break;
+        }
+    }
+
+    return found;
+}
+
 static RAMBlock *qemu_get_ram_block(ram_addr_t addr)
 {
     RAMBlock *block;
diff --git a/include/exec/ram_addr.h b/include/exec/ram_addr.h
index e9eb831..a4b2c3e 100644
--- a/include/exec/ram_addr.h
+++ b/include/exec/ram_addr.h
@@ -28,6 +28,7 @@ ram_addr_t qemu_ram_alloc_from_file(ram_addr_t size, MemoryRegion *mr,
 ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
                                    MemoryRegion *mr);
 ram_addr_t qemu_ram_alloc(ram_addr_t size, MemoryRegion *mr);
+bool qemu_is_ram_block(ram_addr_t addr);
 int qemu_get_ram_fd(ram_addr_t addr);
 void *qemu_get_ram_block_host_ptr(ram_addr_t addr);
 void *qemu_get_ram_ptr(ram_addr_t addr);