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hw/riscv: virt: Allow passing custom DTB

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Extend virt machine to allow passing custom DTB using "-dtb"
command-line parameter. This will help users pass modified DTB
to virt machine.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20201022053225.2596110-2-anup.patel@wdc.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Anup Patel 2020-10-22 11:02:25 +05:30 committed by Alistair Francis
parent d5c90cf3f6
commit 4e1e3003fb
1 changed files with 20 additions and 7 deletions
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27
hw/riscv/virt.c
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@ -181,6 +181,7 @@ static void create_fdt(RISCVVirtState *s, const struct MemmapEntry *memmap,
{
void *fdt;
int i, cpu, socket;
const char *dtb_filename;
MachineState *mc = MACHINE(s);
uint64_t addr, size;
uint32_t *clint_cells, *plic_cells;
@ -194,10 +195,20 @@ static void create_fdt(RISCVVirtState *s, const struct MemmapEntry *memmap,
hwaddr flashsize = virt_memmap[VIRT_FLASH].size / 2;
hwaddr flashbase = virt_memmap[VIRT_FLASH].base;
fdt = s->fdt = create_device_tree(&s->fdt_size);
if (!fdt) {
error_report("create_device_tree() failed");
exit(1);
dtb_filename = qemu_opt_get(qemu_get_machine_opts(), "dtb");
if (dtb_filename) {
fdt = s->fdt = load_device_tree(dtb_filename, &s->fdt_size);
if (!fdt) {
error_report("load_device_tree() failed");
exit(1);
}
goto update_bootargs;
} else {
fdt = s->fdt = create_device_tree(&s->fdt_size);
if (!fdt) {
error_report("create_device_tree() failed");
exit(1);
}
}
qemu_fdt_setprop_string(fdt, "/", "model", "riscv-virtio,qemu");
@ -418,9 +429,6 @@ static void create_fdt(RISCVVirtState *s, const struct MemmapEntry *memmap,
qemu_fdt_add_subnode(fdt, "/chosen");
qemu_fdt_setprop_string(fdt, "/chosen", "stdout-path", name);
if (cmdline) {
qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", cmdline);
}
g_free(name);
name = g_strdup_printf("/soc/rtc@%lx", (long)memmap[VIRT_RTC].base);
@ -441,6 +449,11 @@ static void create_fdt(RISCVVirtState *s, const struct MemmapEntry *memmap,
2, flashbase + flashsize, 2, flashsize);
qemu_fdt_setprop_cell(s->fdt, name, "bank-width", 4);
g_free(name);
update_bootargs:
if (cmdline) {
qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", cmdline);
}
}
static inline DeviceState *gpex_pcie_init(MemoryRegion *sys_mem,