[PULL,058/136] ppc/e500: drop RAM size fixup

Commit Message

Paolo Bonzini Feb. 25, 2020, 11:49 a.m. UTC

From: Igor Mammedov <[e-mail]>

If user provided non-sense RAM size, board will complain and
continue running with max RAM size supported.
Also RAM is going to be allocated by generic code, so it won't be
possible for board to fix things up for user.

Make it error message and exit to force user fix CLI,
instead of accepting non-sense CLI values.

While at it, replace usage of global ram_size with
machine->ram_size

Signed-off-by: Igor Mammedov <[e-mail]>
Acked-by: David Gibson <[e-mail]>
Reviewed-by: Richard Henderson <[e-mail]>
Message-Id: <[e-mail]>
---
 hw/ppc/e500.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

Patch

diff --git a/hw/ppc/e500.c b/hw/ppc/e500.c
index 886442e..960024b 100644
--- a/hw/ppc/e500.c
+++ b/hw/ppc/e500.c
@@ -906,12 +906,14 @@  void ppce500_init(MachineState *machine)
 
     env = firstenv;
 
-    /* Fixup Memory size on a alignment boundary */
-    ram_size &= ~(RAM_SIZES_ALIGN - 1);
-    machine->ram_size = ram_size;
+    if (!QEMU_IS_ALIGNED(machine->ram_size, RAM_SIZES_ALIGN)) {
+        error_report("RAM size must be multiple of %" PRIu64, RAM_SIZES_ALIGN);
+        exit(EXIT_FAILURE);
+    }
 
     /* Register Memory */
-    memory_region_allocate_system_memory(ram, NULL, "mpc8544ds.ram", ram_size);
+    memory_region_allocate_system_memory(ram, NULL, "mpc8544ds.ram",
+                                         machine->ram_size);
     memory_region_add_subregion(address_space_mem, 0, ram);
 
     dev = qdev_create(NULL, "e500-ccsr");
@@ -1083,7 +1085,7 @@  void ppce500_init(MachineState *machine)
         kernel_base = cur_base;
         kernel_size = load_image_targphys(machine->kernel_filename,
                                           cur_base,
-                                          ram_size - cur_base);
+                                          machine->ram_size - cur_base);
         if (kernel_size < 0) {
             error_report("could not load kernel '%s'",
                          machine->kernel_filename);
@@ -1097,7 +1099,7 @@  void ppce500_init(MachineState *machine)
     if (machine->initrd_filename) {
         initrd_base = (cur_base + INITRD_LOAD_PAD) & ~INITRD_PAD_MASK;
         initrd_size = load_image_targphys(machine->initrd_filename, initrd_base,
-                                          ram_size - initrd_base);
+                                          machine->ram_size - initrd_base);
 
         if (initrd_size < 0) {
             error_report("could not load initial ram disk '%s'",
@@ -1115,7 +1117,7 @@  void ppce500_init(MachineState *machine)
      * ensures enough space between kernel and initrd.
      */
     dt_base = (loadaddr + payload_size + DTC_LOAD_PAD) & ~DTC_PAD_MASK;
-    if (dt_base + DTB_MAX_SIZE > ram_size) {
+    if (dt_base + DTB_MAX_SIZE > machine->ram_size) {
             error_report("not enough memory for device tree");
             exit(1);
     }