hw/riscv: virt: Add a machine done notifier

Move the binary and device tree loading code to the machine done
notifier. This allows us to prepare for editing the device tree as part
of the notifier.

This is based on similar code in the ARM virt machine.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@amd.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Message-Id: <20220427234146.1130752-2-alistair.francis@opensource.wdc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
index 643fee23f7c4d78e39b46a122af22539a324eb05..f849052c75e77261f231360b69832d62d8c06722 100644 (file)
--- a/hw/riscv/virt.c
+++ b/hw/riscv/virt.c
@@ -1162,6 +1162,100 @@ static DeviceState *virt_create_aia(RISCVVirtAIAType aia_type, int aia_guests,
     return aplic_m;
 }
 
+static void virt_machine_done(Notifier *notifier, void *data)
+{
+    RISCVVirtState *s = container_of(notifier, RISCVVirtState,
+                                     machine_done);
+    const MemMapEntry *memmap = virt_memmap;
+    MachineState *machine = MACHINE(s);
+    target_ulong start_addr = memmap[VIRT_DRAM].base;
+    target_ulong firmware_end_addr, kernel_start_addr;
+    uint32_t fdt_load_addr;
+    uint64_t kernel_entry;
+
+    /*
+     * Only direct boot kernel is currently supported for KVM VM,
+     * so the "-bios" parameter is not supported when KVM is enabled.
+     */
+    if (kvm_enabled()) {
+        if (machine->firmware) {
+            if (strcmp(machine->firmware, "none")) {
+                error_report("Machine mode firmware is not supported in "
+                             "combination with KVM.");
+                exit(1);
+            }
+        } else {
+            machine->firmware = g_strdup("none");
+        }
+    }
+
+    if (riscv_is_32bit(&s->soc[0])) {
+        firmware_end_addr = riscv_find_and_load_firmware(machine,
+                                    RISCV32_BIOS_BIN, start_addr, NULL);
+    } else {
+        firmware_end_addr = riscv_find_and_load_firmware(machine,
+                                    RISCV64_BIOS_BIN, start_addr, NULL);
+    }
+
+    if (machine->kernel_filename) {
+        kernel_start_addr = riscv_calc_kernel_start_addr(&s->soc[0],
+                                                         firmware_end_addr);
+
+        kernel_entry = riscv_load_kernel(machine->kernel_filename,
+                                         kernel_start_addr, NULL);
+
+        if (machine->initrd_filename) {
+            hwaddr start;
+            hwaddr end = riscv_load_initrd(machine->initrd_filename,
+                                           machine->ram_size, kernel_entry,
+                                           &start);
+            qemu_fdt_setprop_cell(machine->fdt, "/chosen",
+                                  "linux,initrd-start", start);
+            qemu_fdt_setprop_cell(machine->fdt, "/chosen", "linux,initrd-end",
+                                  end);
+        }
+    } else {
+       /*
+        * If dynamic firmware is used, it doesn't know where is the next mode
+        * if kernel argument is not set.
+        */
+        kernel_entry = 0;
+    }
+
+    if (drive_get(IF_PFLASH, 0, 0)) {
+        /*
+         * Pflash was supplied, let's overwrite the address we jump to after
+         * reset to the base of the flash.
+         */
+        start_addr = virt_memmap[VIRT_FLASH].base;
+    }
+
+    /*
+     * Init fw_cfg.  Must be done before riscv_load_fdt, otherwise the device
+     * tree cannot be altered and we get FDT_ERR_NOSPACE.
+     */
+    s->fw_cfg = create_fw_cfg(machine);
+    rom_set_fw(s->fw_cfg);
+
+    /* Compute the fdt load address in dram */
+    fdt_load_addr = riscv_load_fdt(memmap[VIRT_DRAM].base,
+                                   machine->ram_size, machine->fdt);
+    /* load the reset vector */
+    riscv_setup_rom_reset_vec(machine, &s->soc[0], start_addr,
+                              virt_memmap[VIRT_MROM].base,
+                              virt_memmap[VIRT_MROM].size, kernel_entry,
+                              fdt_load_addr, machine->fdt);
+
+    /*
+     * Only direct boot kernel is currently supported for KVM VM,
+     * So here setup kernel start address and fdt address.
+     * TODO:Support firmware loading and integrate to TCG start
+     */
+    if (kvm_enabled()) {
+        riscv_setup_direct_kernel(kernel_entry, fdt_load_addr);
+    }
+}
+
 static void virt_machine_init(MachineState *machine)
 {
     const MemMapEntry *memmap = virt_memmap;
@@ -1169,10 +1263,6 @@ static void virt_machine_init(MachineState *machine)
     MemoryRegion *system_memory = get_system_memory();
     MemoryRegion *mask_rom = g_new(MemoryRegion, 1);
     char *soc_name;
-    target_ulong start_addr = memmap[VIRT_DRAM].base;
-    target_ulong firmware_end_addr, kernel_start_addr;
-    uint32_t fdt_load_addr;
-    uint64_t kernel_entry;
     DeviceState *mmio_irqchip, *virtio_irqchip, *pcie_irqchip;
     int i, base_hartid, hart_count;
 
@@ -1302,98 +1392,12 @@ static void virt_machine_init(MachineState *machine)
     memory_region_add_subregion(system_memory, memmap[VIRT_DRAM].base,
         machine->ram);
 
-    /* create device tree */
-    create_fdt(s, memmap, machine->ram_size, machine->kernel_cmdline,
-               riscv_is_32bit(&s->soc[0]));
-
     /* boot rom */
     memory_region_init_rom(mask_rom, NULL, "riscv_virt_board.mrom",
                            memmap[VIRT_MROM].size, &error_fatal);
     memory_region_add_subregion(system_memory, memmap[VIRT_MROM].base,
                                 mask_rom);
 
-    /*
-     * Only direct boot kernel is currently supported for KVM VM,
-     * so the "-bios" parameter is not supported when KVM is enabled.
-     */
-    if (kvm_enabled()) {
-        if (machine->firmware) {
-            if (strcmp(machine->firmware, "none")) {
-                error_report("Machine mode firmware is not supported in "
-                             "combination with KVM.");
-                exit(1);
-            }
-        } else {
-            machine->firmware = g_strdup("none");
-        }
-    }
-
-    if (riscv_is_32bit(&s->soc[0])) {
-        firmware_end_addr = riscv_find_and_load_firmware(machine,
-                                    RISCV32_BIOS_BIN, start_addr, NULL);
-    } else {
-        firmware_end_addr = riscv_find_and_load_firmware(machine,
-                                    RISCV64_BIOS_BIN, start_addr, NULL);
-    }
-
-    if (machine->kernel_filename) {
-        kernel_start_addr = riscv_calc_kernel_start_addr(&s->soc[0],
-                                                         firmware_end_addr);
-
-        kernel_entry = riscv_load_kernel(machine->kernel_filename,
-                                         kernel_start_addr, NULL);
-
-        if (machine->initrd_filename) {
-            hwaddr start;
-            hwaddr end = riscv_load_initrd(machine->initrd_filename,
-                                           machine->ram_size, kernel_entry,
-                                           &start);
-            qemu_fdt_setprop_cell(machine->fdt, "/chosen",
-                                  "linux,initrd-start", start);
-            qemu_fdt_setprop_cell(machine->fdt, "/chosen", "linux,initrd-end",
-                                  end);
-        }
-    } else {
-       /*
-        * If dynamic firmware is used, it doesn't know where is the next mode
-        * if kernel argument is not set.
-        */
-        kernel_entry = 0;
-    }
-
-    if (drive_get(IF_PFLASH, 0, 0)) {
-        /*
-         * Pflash was supplied, let's overwrite the address we jump to after
-         * reset to the base of the flash.
-         */
-        start_addr = virt_memmap[VIRT_FLASH].base;
-    }
-
-    /*
-     * Init fw_cfg.  Must be done before riscv_load_fdt, otherwise the device
-     * tree cannot be altered and we get FDT_ERR_NOSPACE.
-     */
-    s->fw_cfg = create_fw_cfg(machine);
-    rom_set_fw(s->fw_cfg);
-
-    /* Compute the fdt load address in dram */
-    fdt_load_addr = riscv_load_fdt(memmap[VIRT_DRAM].base,
-                                   machine->ram_size, machine->fdt);
-    /* load the reset vector */
-    riscv_setup_rom_reset_vec(machine, &s->soc[0], start_addr,
-                              virt_memmap[VIRT_MROM].base,
-                              virt_memmap[VIRT_MROM].size, kernel_entry,
-                              fdt_load_addr, machine->fdt);
-
-    /*
-     * Only direct boot kernel is currently supported for KVM VM,
-     * So here setup kernel start address and fdt address.
-     * TODO:Support firmware loading and integrate to TCG start
-     */
-    if (kvm_enabled()) {
-        riscv_setup_direct_kernel(kernel_entry, fdt_load_addr);
-    }
-
     /* SiFive Test MMIO device */
     sifive_test_create(memmap[VIRT_TEST].base);
 
@@ -1429,6 +1433,13 @@ static void virt_machine_init(MachineState *machine)
                                   drive_get(IF_PFLASH, 0, i));
     }
     virt_flash_map(s, system_memory);
+
+    /* create device tree */
+    create_fdt(s, memmap, machine->ram_size, machine->kernel_cmdline,
+               riscv_is_32bit(&s->soc[0]));
+
+    s->machine_done.notify = virt_machine_done;
+    qemu_add_machine_init_done_notifier(&s->machine_done);
 }
 
 static void virt_machine_instance_init(Object *obj)

diff --git a/include/hw/riscv/virt.h b/include/hw/riscv/virt.h
index 78b058ec8683513d306122f16892befa3b1a9208..8b8db3fb7cd57591a538b6b43fb327a188b1ca9f 100644 (file)
--- a/include/hw/riscv/virt.h
+++ b/include/hw/riscv/virt.h
@@ -45,6 +45,7 @@ struct RISCVVirtState {
     MachineState parent;
 
     /*< public >*/
+    Notifier machine_done;
     RISCVHartArrayState soc[VIRT_SOCKETS_MAX];
     DeviceState *irqchip[VIRT_SOCKETS_MAX];
     PFlashCFI01 *flash[2];