Merge remote-tracking branch 'remotes/vivier/tags/m68k-for-7.0-pull-request' into staging

m68k pull request 20220120

Fix virt-m68k reboot

# gpg: Signature made Thu 20 Jan 2022 08:35:50 GMT
# gpg:                using RSA key CD2F75DDC8E3A4DC2E4F5173F30C38BD3F2FBE3C
# gpg:                issuer "laurent@vivier.eu"
# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" [full]
# gpg:                 aka "Laurent Vivier <laurent@vivier.eu>" [full]
# gpg:                 aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>" [full]
# Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F  5173 F30C 38BD 3F2F BE3C

* remotes/vivier/tags/m68k-for-7.0-pull-request:
  m68k: virt: correctly set the initial PC
  hw/elf_ops: clear uninitialized segment space
  exec/memory: Extract address_space_set() from dma_memory_set()

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

2 files changed, 21 insertions, 5 deletions

diff --git a/hw/core/loader.c b/hw/core/loader.c
index 052a0fd..19edb92 100644
--- a/hw/core/loader.c
+++ b/hw/core/loader.c
@@ -1164,9 +1164,13 @@ static void rom_reset(void *unused)
         if (rom->mr) {
             void *host = memory_region_get_ram_ptr(rom->mr);
             memcpy(host, rom->data, rom->datasize);
+            memset(host + rom->datasize, 0, rom->romsize - rom->datasize);
         } else {
             address_space_write_rom(rom->as, rom->addr, MEMTXATTRS_UNSPECIFIED,
                                     rom->data, rom->datasize);
+            address_space_set(rom->as, rom->addr + rom->datasize, 0,
+                              rom->romsize - rom->datasize,
+                              MEMTXATTRS_UNSPECIFIED);
         }
         if (rom->isrom) {
             /* rom needs to be written only once */
diff --git a/hw/m68k/virt.c b/hw/m68k/virt.c
index 78e926a..bbaf630 100644
--- a/hw/m68k/virt.c
+++ b/hw/m68k/virt.c
@@ -85,14 +85,21 @@
 #define VIRT_VIRTIO_MMIO_BASE 0xff010000     /* MMIO: 0xff010000 - 0xff01ffff */
 #define VIRT_VIRTIO_IRQ_BASE  PIC_IRQ(2, 1)  /* PIC: 2, 3, 4, 5, IRQ: ALL */
 
+typedef struct {
+    M68kCPU *cpu;
+    hwaddr initial_pc;
+    hwaddr initial_stack;
+} ResetInfo;
+
 static void main_cpu_reset(void *opaque)
 {
-    M68kCPU *cpu = opaque;
+    ResetInfo *reset_info = opaque;
+    M68kCPU *cpu = reset_info->cpu;
     CPUState *cs = CPU(cpu);
 
     cpu_reset(cs);
-    cpu->env.aregs[7] = ldl_phys(cs->as, 0);
-    cpu->env.pc = ldl_phys(cs->as, 4);
+    cpu->env.aregs[7] = reset_info->initial_stack;
+    cpu->env.pc = reset_info->initial_pc;
 }
 
 static void virt_init(MachineState *machine)
@@ -113,6 +120,7 @@ static void virt_init(MachineState *machine)
     SysBusDevice *sysbus;
     hwaddr io_base;
     int i;
+    ResetInfo *reset_info;
 
     if (ram_size > 3399672 * KiB) {
         /*
@@ -124,9 +132,13 @@ static void virt_init(MachineState *machine)
         exit(1);
     }
 
+    reset_info = g_malloc0(sizeof(ResetInfo));
+
     /* init CPUs */
     cpu = M68K_CPU(cpu_create(machine->cpu_type));
-    qemu_register_reset(main_cpu_reset, cpu);
+
+    reset_info->cpu = cpu;
+    qemu_register_reset(main_cpu_reset, reset_info);
 
     /* RAM */
     memory_region_add_subregion(get_system_memory(), 0, machine->ram);
@@ -206,7 +218,7 @@ static void virt_init(MachineState *machine)
             error_report("could not load kernel '%s'", kernel_filename);
             exit(1);
         }
-        stl_phys(cs->as, 4, elf_entry); /* reset initial PC */
+        reset_info->initial_pc = elf_entry;
         parameters_base = (high + 1) & ~1;
 
         BOOTINFO1(cs->as, parameters_base, BI_MACHTYPE, MACH_VIRT);