From c95c9d200e22b17858ec9287b6a9716d053e48aa Mon Sep 17 00:00:00 2001 From: Daniel Henrique Barboza Date: Wed, 22 Feb 2023 15:52:03 -0300 Subject: hw/riscv/virt.c: do not use RISCV_FEATURE_MMU in create_fdt_socket_cpus() Read cpu_ptr->cfg.mmu directly. As a bonus, use cpu_ptr in riscv_isa_string(). Signed-off-by: Daniel Henrique Barboza Reviewed-by: Weiwei Li Reviewed-by: Bin Meng Reviewed-by: Andrew Jones Reviewed-by: LIU Zhiwei Message-ID: <20230222185205.355361-9-dbarboza@ventanamicro.com> Signed-off-by: Palmer Dabbelt --- hw/riscv/virt.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'hw') diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c index 86c4adc0c9..49f2c157f7 100644 --- a/hw/riscv/virt.c +++ b/hw/riscv/virt.c @@ -232,20 +232,21 @@ static void create_fdt_socket_cpus(RISCVVirtState *s, int socket, bool is_32_bit = riscv_is_32bit(&s->soc[0]); for (cpu = s->soc[socket].num_harts - 1; cpu >= 0; cpu--) { + RISCVCPU *cpu_ptr = &s->soc[socket].harts[cpu]; + cpu_phandle = (*phandle)++; cpu_name = g_strdup_printf("/cpus/cpu@%d", s->soc[socket].hartid_base + cpu); qemu_fdt_add_subnode(ms->fdt, cpu_name); - if (riscv_feature(&s->soc[socket].harts[cpu].env, - RISCV_FEATURE_MMU)) { + if (cpu_ptr->cfg.mmu) { qemu_fdt_setprop_string(ms->fdt, cpu_name, "mmu-type", (is_32_bit) ? "riscv,sv32" : "riscv,sv48"); } else { qemu_fdt_setprop_string(ms->fdt, cpu_name, "mmu-type", "riscv,none"); } - name = riscv_isa_string(&s->soc[socket].harts[cpu]); + name = riscv_isa_string(cpu_ptr); qemu_fdt_setprop_string(ms->fdt, cpu_name, "riscv,isa", name); g_free(name); qemu_fdt_setprop_string(ms->fdt, cpu_name, "compatible", "riscv"); -- cgit v1.2.3 From d43d54ca2b27077974928ee7783a0ae1f9838a8d Mon Sep 17 00:00:00 2001 From: Bin Meng Date: Tue, 28 Feb 2023 15:45:21 +0800 Subject: hw/riscv: Skip re-generating DT nodes for a given DTB Launch qemu-system-riscv64 with a given dtb for 'sifive_u' and 'virt' machines, QEMU complains: qemu_fdt_add_subnode: Failed to create subnode /soc: FDT_ERR_EXISTS The whole DT generation logic should be skipped when a given DTB is present. Fixes: b1f19f238cae ("hw/riscv: write bootargs 'chosen' FDT after riscv_load_kernel()") Signed-off-by: Bin Meng Reviewed-by: Daniel Henrique Barboza Message-ID: <20230228074522.1845007-1-bmeng@tinylab.org> Signed-off-by: Palmer Dabbelt --- hw/riscv/sifive_u.c | 1 + hw/riscv/virt.c | 1 + 2 files changed, 2 insertions(+) (limited to 'hw') diff --git a/hw/riscv/sifive_u.c b/hw/riscv/sifive_u.c index ad3bb35b34..76db5ed3dd 100644 --- a/hw/riscv/sifive_u.c +++ b/hw/riscv/sifive_u.c @@ -118,6 +118,7 @@ static void create_fdt(SiFiveUState *s, const MemMapEntry *memmap, error_report("load_device_tree() failed"); exit(1); } + return; } else { fdt = ms->fdt = create_device_tree(&fdt_size); if (!fdt) { diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c index 49f2c157f7..981392c0bb 100644 --- a/hw/riscv/virt.c +++ b/hw/riscv/virt.c @@ -1015,6 +1015,7 @@ static void create_fdt(RISCVVirtState *s, const MemMapEntry *memmap) error_report("load_device_tree() failed"); exit(1); } + return; } else { ms->fdt = create_device_tree(&s->fdt_size); if (!ms->fdt) { -- cgit v1.2.3 From fc9ec3625f6dee52811c8150af994abe3c1668a3 Mon Sep 17 00:00:00 2001 From: Bin Meng Date: Tue, 28 Feb 2023 15:45:22 +0800 Subject: hw/riscv: Move the dtb load bits outside of create_fdt() Move the dtb load bits outside of create_fdt(), and put it explicitly in sifive_u_machine_init() and virt_machine_init(). With such change create_fdt() does exactly what its function name tells us. Suggested-by: Daniel Henrique Barboza Signed-off-by: Bin Meng Reviewed-by: Daniel Henrique Barboza Message-ID: <20230228074522.1845007-2-bmeng@tinylab.org> Signed-off-by: Palmer Dabbelt --- hw/riscv/sifive_u.c | 31 +++++++++++++++---------------- hw/riscv/virt.c | 29 ++++++++++++++--------------- 2 files changed, 29 insertions(+), 31 deletions(-) (limited to 'hw') diff --git a/hw/riscv/sifive_u.c b/hw/riscv/sifive_u.c index 76db5ed3dd..35a335b8d0 100644 --- a/hw/riscv/sifive_u.c +++ b/hw/riscv/sifive_u.c @@ -99,7 +99,7 @@ static void create_fdt(SiFiveUState *s, const MemMapEntry *memmap, MachineState *ms = MACHINE(s); uint64_t mem_size = ms->ram_size; void *fdt; - int cpu, fdt_size; + int cpu; uint32_t *cells; char *nodename; uint32_t plic_phandle, prci_phandle, gpio_phandle, phandle = 1; @@ -112,19 +112,10 @@ static void create_fdt(SiFiveUState *s, const MemMapEntry *memmap, "sifive,plic-1.0.0", "riscv,plic0" }; - if (ms->dtb) { - fdt = ms->fdt = load_device_tree(ms->dtb, &fdt_size); - if (!fdt) { - error_report("load_device_tree() failed"); - exit(1); - } - return; - } else { - fdt = ms->fdt = create_device_tree(&fdt_size); - if (!fdt) { - error_report("create_device_tree() failed"); - exit(1); - } + fdt = ms->fdt = create_device_tree(&s->fdt_size); + if (!fdt) { + error_report("create_device_tree() failed"); + exit(1); } qemu_fdt_setprop_string(fdt, "/", "model", "SiFive HiFive Unleashed A00"); @@ -561,8 +552,16 @@ static void sifive_u_machine_init(MachineState *machine) qdev_connect_gpio_out(DEVICE(&(s->soc.gpio)), 10, qemu_allocate_irq(sifive_u_machine_reset, NULL, 0)); - /* create device tree */ - create_fdt(s, memmap, riscv_is_32bit(&s->soc.u_cpus)); + /* load/create device tree */ + if (machine->dtb) { + machine->fdt = load_device_tree(machine->dtb, &s->fdt_size); + if (!machine->fdt) { + error_report("load_device_tree() failed"); + exit(1); + } + } else { + create_fdt(s, memmap, riscv_is_32bit(&s->soc.u_cpus)); + } if (s->start_in_flash) { /* diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c index 981392c0bb..4f8191860b 100644 --- a/hw/riscv/virt.c +++ b/hw/riscv/virt.c @@ -1009,19 +1009,10 @@ static void create_fdt(RISCVVirtState *s, const MemMapEntry *memmap) uint32_t irq_pcie_phandle = 1, irq_virtio_phandle = 1; uint8_t rng_seed[32]; - if (ms->dtb) { - ms->fdt = load_device_tree(ms->dtb, &s->fdt_size); - if (!ms->fdt) { - error_report("load_device_tree() failed"); - exit(1); - } - return; - } else { - ms->fdt = create_device_tree(&s->fdt_size); - if (!ms->fdt) { - error_report("create_device_tree() failed"); - exit(1); - } + ms->fdt = create_device_tree(&s->fdt_size); + if (!ms->fdt) { + error_report("create_device_tree() failed"); + exit(1); } qemu_fdt_setprop_string(ms->fdt, "/", "model", "riscv-virtio,qemu"); @@ -1506,8 +1497,16 @@ static void virt_machine_init(MachineState *machine) } virt_flash_map(s, system_memory); - /* create device tree */ - create_fdt(s, memmap); + /* load/create device tree */ + if (machine->dtb) { + machine->fdt = load_device_tree(machine->dtb, &s->fdt_size); + if (!machine->fdt) { + error_report("load_device_tree() failed"); + exit(1); + } + } else { + create_fdt(s, memmap); + } s->machine_done.notify = virt_machine_done; qemu_add_machine_init_done_notifier(&s->machine_done); -- cgit v1.2.3