Right now, kvm keeps the memory allocation split, so we can

handle different areas in different ways. This schema works with qemu
too, so it appears to be the common ground.

This patch proposes using this common ground for everyone, by spliting
raw qemu.

Signed-off-by: Glauber Costa <glommer@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5228 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 16 insertions, 4 deletions

diff --git a/hw/pc.c b/hw/pc.c
index 435c7d4..9fd1bdf 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -777,16 +777,28 @@ static void pc_init1(ram_addr_t ram_size, int vga_ram_size,
     vmport_init();
 
     /* allocate RAM */
-    ram_addr = qemu_ram_alloc(ram_size);
-    cpu_register_physical_memory(0, below_4g_mem_size, ram_addr);
+    ram_addr = qemu_ram_alloc(0xa0000);
+    cpu_register_physical_memory(0, 0xa0000, ram_addr);
+
+    /* Allocate, even though we won't register, so we don't break the
+     * phys_ram_base + PA assumption. This range includes vga (0xa0000 - 0xc0000),
+     * and some bios areas, which will be registered later
+     */
+    ram_addr = qemu_ram_alloc(0x100000 - 0xa0000);
+    ram_addr = qemu_ram_alloc(below_4g_mem_size - 0x100000);
+    cpu_register_physical_memory(0x100000,
+                 below_4g_mem_size - 0x100000,
+                 ram_addr);
 
     /* above 4giga memory allocation */
     if (above_4g_mem_size > 0) {
-        cpu_register_physical_memory((target_phys_addr_t) 0x100000000ULL,
+        ram_addr = qemu_ram_alloc(above_4g_mem_size);
+        cpu_register_physical_memory(0x100000000ULL,
                                      above_4g_mem_size,
-                                     ram_addr + below_4g_mem_size);
+                                     ram_addr);
     }
 
+
     /* allocate VGA RAM */
     vga_ram_addr = qemu_ram_alloc(vga_ram_size);