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Re: [PATCH 41/86] null-machine: use memdev for RAM


From: Philippe Mathieu-Daudé
Subject: Re: [PATCH 41/86] null-machine: use memdev for RAM
Date: Tue, 31 Dec 2019 16:32:51 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2

On 12/31/19 2:03 PM, Igor Mammedov wrote:
memory_region_allocate_system_memory() API is going away, so
replace it with memdev allocated MemoryRegion. The later is
initialized by generic code, so board only needs to opt in
to memdev scheme by providing
   MachineClass::default_ram_id
and using MachineState::ram instead of manually initializing
RAM memory region.

Signed-off-by: Igor Mammedov <address@hidden>

Reviewed-by: Philippe Mathieu-Daudé <address@hidden>

---
  hw/core/null-machine.c | 8 +++-----
  1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/hw/core/null-machine.c b/hw/core/null-machine.c
index 1aa0a9a..cb47d9d 100644
--- a/hw/core/null-machine.c
+++ b/hw/core/null-machine.c
@@ -32,11 +32,8 @@ static void machine_none_init(MachineState *mch)
      }
/* RAM at address zero */
-    if (mch->ram_size) {
-        MemoryRegion *ram = g_new(MemoryRegion, 1);
-
-        memory_region_allocate_system_memory(ram, NULL, "ram", mch->ram_size);
-        memory_region_add_subregion(get_system_memory(), 0, ram);
+    if (mch->ram) {
+        memory_region_add_subregion(get_system_memory(), 0, mch->ram);
      }
if (mch->kernel_filename) {
@@ -52,6 +49,7 @@ static void machine_none_machine_init(MachineClass *mc)
      mc->init = machine_none_init;
      mc->max_cpus = 1;
      mc->default_ram_size = 0;
+    mc->default_ram_id = "ram";
  }
DEFINE_MACHINE("none", machine_none_machine_init)





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