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authorNiklas Cassel <niklas.cassel@wdc.com>2022-04-14 17:55:10 +0200
committerAlistair Francis <alistair.francis@wdc.com>2022-04-22 10:35:16 +1000
commitd6db2c0fabf979397189aa105d7708be2b433cc4 (patch)
treed82993ddbe38ed3c98d3193c9797def296c191ee /hw/riscv
parent6248a8fe4d8ad84b407d26559c0cb65b9a61eb67 (diff)
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hw/riscv: virt: fix DT property mmu-type when CPU mmu option is disabled
The device tree property "mmu-type" is currently exported as either "riscv,sv32" or "riscv,sv48". However, the riscv cpu device tree binding [1] has a specific value "riscv,none" for a HART without a MMU. Set the device tree property "mmu-type" to "riscv,none" when the CPU mmu option is disabled using rv32,mmu=off or rv64,mmu=off. [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/riscv/cpus.yaml?h=v5.17 Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Frank Chang <frank.chang@sifive.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <20220414155510.1364147-1-niklas.cassel@wdc.com> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Diffstat (limited to 'hw/riscv')
-rw-r--r--hw/riscv/virt.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
index 09609c9..b49c536 100644
--- a/hw/riscv/virt.c
+++ b/hw/riscv/virt.c
@@ -230,8 +230,14 @@ static void create_fdt_socket_cpus(RISCVVirtState *s, int socket,
cpu_name = g_strdup_printf("/cpus/cpu@%d",
s->soc[socket].hartid_base + cpu);
qemu_fdt_add_subnode(mc->fdt, cpu_name);
- qemu_fdt_setprop_string(mc->fdt, cpu_name, "mmu-type",
- (is_32_bit) ? "riscv,sv32" : "riscv,sv48");
+ if (riscv_feature(&s->soc[socket].harts[cpu].env,
+ RISCV_FEATURE_MMU)) {
+ qemu_fdt_setprop_string(mc->fdt, cpu_name, "mmu-type",
+ (is_32_bit) ? "riscv,sv32" : "riscv,sv48");
+ } else {
+ qemu_fdt_setprop_string(mc->fdt, cpu_name, "mmu-type",
+ "riscv,none");
+ }
name = riscv_isa_string(&s->soc[socket].harts[cpu]);
qemu_fdt_setprop_string(mc->fdt, cpu_name, "riscv,isa", name);
g_free(name);