[Qemu-devel] [PATCH] split memory allocation

[Glauber Costa <glommer@redhat.com>]

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>
---
 hw/pc.c |   16 ++++++++++++----
 1 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/hw/pc.c b/hw/pc.c
index 435c7d4..d6084ee 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -777,16 +777,24 @@ 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);
+
+    ram_addr = qemu_ram_alloc(0x100000 - 0xa0000);   /* hole */
+    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);
 
-- 
1.5.5.1