qemu-riscv
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[PATCH v3 2/4] hw/riscv: spike: Allow creating multiple sockets


From: Anup Patel
Subject: [PATCH v3 2/4] hw/riscv: spike: Allow creating multiple sockets
Date: Wed, 27 May 2020 17:41:29 +0530

We extend RISC-V spike machine to allow creating a multi-socket machine.
Each RISC-V spike machine socket is a set of HARTs and a CLINT instance.
Other peripherals are shared between all RISC-V spike machine sockets.
We also update RISC-V spike machine device tree to treat each socket as
a NUMA node.

By default, multi-socket support is disabled for RISC-V spike machine.
To enable multi-socket support, users can pass "multi-socket=on" option
in machine name.

The number of sockets in RISC-V spike machine can be specified using
the "sockets=" sub-option of QEMU "-smp" command-line option.

Currently, we only allow creating upto maximum 4 sockets but this limit
can be changed in future.

Signed-off-by: Anup Patel <address@hidden>
---
 hw/riscv/spike.c         | 269 ++++++++++++++++++++++++++-------------
 include/hw/riscv/spike.h |  13 +-
 2 files changed, 195 insertions(+), 87 deletions(-)

diff --git a/hw/riscv/spike.c b/hw/riscv/spike.c
index d5e0103d89..b60350e912 100644
--- a/hw/riscv/spike.c
+++ b/hw/riscv/spike.c
@@ -64,9 +64,11 @@ static void create_fdt(SpikeState *s, const struct 
MemmapEntry *memmap,
     uint64_t mem_size, const char *cmdline)
 {
     void *fdt;
-    int cpu;
-    uint32_t *cells;
-    char *nodename;
+    int cpu, socket;
+    uint32_t *clint_cells;
+    unsigned long clint_addr;
+    uint32_t cpu_phandle, intc_phandle, phandle = 1;
+    char *name, *clint_name, *clust_name, *core_name, *cpu_name, *intc_name;
 
     fdt = s->fdt = create_device_tree(&s->fdt_size);
     if (!fdt) {
@@ -88,68 +90,87 @@ static void create_fdt(SpikeState *s, const struct 
MemmapEntry *memmap,
     qemu_fdt_setprop_cell(fdt, "/soc", "#size-cells", 0x2);
     qemu_fdt_setprop_cell(fdt, "/soc", "#address-cells", 0x2);
 
-    nodename = g_strdup_printf("/memory@%lx",
-        (long)memmap[SPIKE_DRAM].base);
-    qemu_fdt_add_subnode(fdt, nodename);
-    qemu_fdt_setprop_cells(fdt, nodename, "reg",
+    name = g_strdup_printf("/memory@%lx", (long)memmap[SPIKE_DRAM].base);
+    qemu_fdt_add_subnode(fdt, name);
+    qemu_fdt_setprop_cells(fdt, name, "reg",
         memmap[SPIKE_DRAM].base >> 32, memmap[SPIKE_DRAM].base,
         mem_size >> 32, mem_size);
-    qemu_fdt_setprop_string(fdt, nodename, "device_type", "memory");
-    g_free(nodename);
+    qemu_fdt_setprop_string(fdt, name, "device_type", "memory");
+    g_free(name);
 
     qemu_fdt_add_subnode(fdt, "/cpus");
     qemu_fdt_setprop_cell(fdt, "/cpus", "timebase-frequency",
         SIFIVE_CLINT_TIMEBASE_FREQ);
     qemu_fdt_setprop_cell(fdt, "/cpus", "#size-cells", 0x0);
     qemu_fdt_setprop_cell(fdt, "/cpus", "#address-cells", 0x1);
+    qemu_fdt_add_subnode(fdt, "/cpus/cpu-map");
 
-    for (cpu = s->soc.num_harts - 1; cpu >= 0; cpu--) {
-        nodename = g_strdup_printf("/cpus/cpu@%d", cpu);
-        char *intc = g_strdup_printf("/cpus/cpu@%d/interrupt-controller", cpu);
-        char *isa = riscv_isa_string(&s->soc.harts[cpu]);
-        qemu_fdt_add_subnode(fdt, nodename);
+    for (socket = (s->num_socs - 1); socket >= 0; socket--) {
+        clust_name = g_strdup_printf("/cpus/cpu-map/cluster%d", socket);
+        qemu_fdt_add_subnode(fdt, clust_name);
+
+        clint_cells =  g_new0(uint32_t, s->soc[socket].num_harts * 4);
+
+        for (cpu = s->soc[socket].num_harts - 1; cpu >= 0; cpu--) {
+            cpu_phandle = phandle++;
+
+            cpu_name = g_strdup_printf("/cpus/cpu@%d",
+                s->soc[socket].hartid_base + cpu);
+            qemu_fdt_add_subnode(fdt, cpu_name);
 #if defined(TARGET_RISCV32)
-        qemu_fdt_setprop_string(fdt, nodename, "mmu-type", "riscv,sv32");
+            qemu_fdt_setprop_string(fdt, cpu_name, "mmu-type", "riscv,sv32");
 #else
-        qemu_fdt_setprop_string(fdt, nodename, "mmu-type", "riscv,sv48");
+            qemu_fdt_setprop_string(fdt, cpu_name, "mmu-type", "riscv,sv48");
 #endif
-        qemu_fdt_setprop_string(fdt, nodename, "riscv,isa", isa);
-        qemu_fdt_setprop_string(fdt, nodename, "compatible", "riscv");
-        qemu_fdt_setprop_string(fdt, nodename, "status", "okay");
-        qemu_fdt_setprop_cell(fdt, nodename, "reg", cpu);
-        qemu_fdt_setprop_string(fdt, nodename, "device_type", "cpu");
-        qemu_fdt_add_subnode(fdt, intc);
-        qemu_fdt_setprop_cell(fdt, intc, "phandle", 1);
-        qemu_fdt_setprop_string(fdt, intc, "compatible", "riscv,cpu-intc");
-        qemu_fdt_setprop(fdt, intc, "interrupt-controller", NULL, 0);
-        qemu_fdt_setprop_cell(fdt, intc, "#interrupt-cells", 1);
-        g_free(isa);
-        g_free(intc);
-        g_free(nodename);
-    }
+            name = riscv_isa_string(&s->soc[socket].harts[cpu]);
+            qemu_fdt_setprop_string(fdt, cpu_name, "riscv,isa", name);
+            g_free(name);
+            qemu_fdt_setprop_string(fdt, cpu_name, "compatible", "riscv");
+            qemu_fdt_setprop_string(fdt, cpu_name, "status", "okay");
+            qemu_fdt_setprop_cell(fdt, cpu_name, "reg",
+                s->soc[socket].hartid_base + cpu);
+            qemu_fdt_setprop_string(fdt, cpu_name, "device_type", "cpu");
+            qemu_fdt_setprop_cell(fdt, cpu_name, "numa-node-id", socket);
+            qemu_fdt_setprop_cell(fdt, cpu_name, "phandle", cpu_phandle);
+
+            intc_name = g_strdup_printf("%s/interrupt-controller", cpu_name);
+            qemu_fdt_add_subnode(fdt, intc_name);
+            intc_phandle = phandle++;
+            qemu_fdt_setprop_cell(fdt, intc_name, "phandle", intc_phandle);
+            qemu_fdt_setprop_string(fdt, intc_name, "compatible",
+                "riscv,cpu-intc");
+            qemu_fdt_setprop(fdt, intc_name, "interrupt-controller", NULL, 0);
+            qemu_fdt_setprop_cell(fdt, intc_name, "#interrupt-cells", 1);
+
+            clint_cells[cpu * 4 + 0] = cpu_to_be32(intc_phandle);
+            clint_cells[cpu * 4 + 1] = cpu_to_be32(IRQ_M_SOFT);
+            clint_cells[cpu * 4 + 2] = cpu_to_be32(intc_phandle);
+            clint_cells[cpu * 4 + 3] = cpu_to_be32(IRQ_M_TIMER);
+
+            core_name = g_strdup_printf("%s/core%d", clust_name, cpu);
+            qemu_fdt_add_subnode(fdt, core_name);
+            qemu_fdt_setprop_cell(fdt, core_name, "cpu", cpu_phandle);
+
+            g_free(core_name);
+            g_free(intc_name);
+            g_free(cpu_name);
+        }
 
-    cells =  g_new0(uint32_t, s->soc.num_harts * 4);
-    for (cpu = 0; cpu < s->soc.num_harts; cpu++) {
-        nodename =
-            g_strdup_printf("/cpus/cpu@%d/interrupt-controller", cpu);
-        uint32_t intc_phandle = qemu_fdt_get_phandle(fdt, nodename);
-        cells[cpu * 4 + 0] = cpu_to_be32(intc_phandle);
-        cells[cpu * 4 + 1] = cpu_to_be32(IRQ_M_SOFT);
-        cells[cpu * 4 + 2] = cpu_to_be32(intc_phandle);
-        cells[cpu * 4 + 3] = cpu_to_be32(IRQ_M_TIMER);
-        g_free(nodename);
+        clint_addr = memmap[SPIKE_CLINT].base +
+            (memmap[SPIKE_CLINT].size * socket);
+        clint_name = g_strdup_printf("/soc/clint@%lx", clint_addr);
+        qemu_fdt_add_subnode(fdt, clint_name);
+        qemu_fdt_setprop_string(fdt, clint_name, "compatible", "riscv,clint0");
+        qemu_fdt_setprop_cells(fdt, clint_name, "reg",
+            0x0, clint_addr, 0x0, memmap[SPIKE_CLINT].size);
+        qemu_fdt_setprop(fdt, clint_name, "interrupts-extended",
+            clint_cells, s->soc[socket].num_harts * sizeof(uint32_t) * 4);
+        qemu_fdt_setprop_cell(fdt, clint_name, "numa-node-id", socket);
+
+        g_free(clint_name);
+        g_free(clint_cells);
+        g_free(clust_name);
     }
-    nodename = g_strdup_printf("/soc/clint@%lx",
-        (long)memmap[SPIKE_CLINT].base);
-    qemu_fdt_add_subnode(fdt, nodename);
-    qemu_fdt_setprop_string(fdt, nodename, "compatible", "riscv,clint0");
-    qemu_fdt_setprop_cells(fdt, nodename, "reg",
-        0x0, memmap[SPIKE_CLINT].base,
-        0x0, memmap[SPIKE_CLINT].size);
-    qemu_fdt_setprop(fdt, nodename, "interrupts-extended",
-        cells, s->soc.num_harts * sizeof(uint32_t) * 4);
-    g_free(cells);
-    g_free(nodename);
 
     if (cmdline) {
         qemu_fdt_add_subnode(fdt, "/chosen");
@@ -160,23 +181,50 @@ static void create_fdt(SpikeState *s, const struct 
MemmapEntry *memmap,
 static void spike_board_init(MachineState *machine)
 {
     const struct MemmapEntry *memmap = spike_memmap;
-
-    SpikeState *s = g_new0(SpikeState, 1);
+    SpikeState *s = SPIKE_MACHINE(machine);
     MemoryRegion *system_memory = get_system_memory();
     MemoryRegion *main_mem = g_new(MemoryRegion, 1);
     MemoryRegion *mask_rom = g_new(MemoryRegion, 1);
     int i;
+    char *soc_name;
     unsigned int smp_cpus = machine->smp.cpus;
+    unsigned int base_hartid, cpus_per_socket;
 
-    /* Initialize SOC */
-    object_initialize_child(OBJECT(machine), "soc", &s->soc, sizeof(s->soc),
-                            TYPE_RISCV_HART_ARRAY, &error_abort, NULL);
-    object_property_set_str(OBJECT(&s->soc), machine->cpu_type, "cpu-type",
-                            &error_abort);
-    object_property_set_int(OBJECT(&s->soc), smp_cpus, "num-harts",
-                            &error_abort);
-    object_property_set_bool(OBJECT(&s->soc), true, "realized",
-                            &error_abort);
+    /* Figure-out number of sockets */
+    s->num_socs = (s->multi_socket) ? machine->smp.sockets : 1;
+
+    /* Limit the number of sockets */
+    if (SPIKE_SOCKETS_MAX < s->num_socs) {
+        s->num_socs = SPIKE_SOCKETS_MAX;
+    }
+
+    /* Initialize socket */
+    for (i = 0; i < s->num_socs; i++) {
+        base_hartid = i * (smp_cpus / s->num_socs);
+        if (i == (s->num_socs - 1)) {
+            cpus_per_socket = smp_cpus - base_hartid;
+        } else {
+            cpus_per_socket = smp_cpus / s->num_socs;
+        }
+        soc_name = g_strdup_printf("soc%d", i);
+        object_initialize_child(OBJECT(machine), soc_name, &s->soc[i],
+            sizeof(s->soc[i]), TYPE_RISCV_HART_ARRAY, &error_abort, NULL);
+        g_free(soc_name);
+        object_property_set_str(OBJECT(&s->soc[i]),
+            machine->cpu_type, "cpu-type", &error_abort);
+        object_property_set_int(OBJECT(&s->soc[i]),
+            base_hartid, "hartid-base", &error_abort);
+        object_property_set_int(OBJECT(&s->soc[i]),
+            cpus_per_socket, "num-harts", &error_abort);
+        object_property_set_bool(OBJECT(&s->soc[i]),
+            true, "realized", &error_abort);
+
+        /* Core Local Interruptor (timer and IPI) for each socket */
+        sifive_clint_create(
+            memmap[SPIKE_CLINT].base + i * memmap[SPIKE_CLINT].size,
+            memmap[SPIKE_CLINT].size, base_hartid, cpus_per_socket,
+            SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE, false);
+    }
 
     /* register system main memory (actual RAM) */
     memory_region_init_ram(main_mem, NULL, "riscv.spike.ram",
@@ -249,12 +297,8 @@ static void spike_board_init(MachineState *machine)
                           &address_space_memory);
 
     /* initialize HTIF using symbols found in load_kernel */
-    htif_mm_init(system_memory, mask_rom, &s->soc.harts[0].env, serial_hd(0));
-
-    /* Core Local Interruptor (timer and IPI) */
-    sifive_clint_create(memmap[SPIKE_CLINT].base, memmap[SPIKE_CLINT].size,
-        0, smp_cpus, SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE,
-        false);
+    htif_mm_init(system_memory, mask_rom,
+                 &s->soc[0].harts[0].env, serial_hd(0));
 }
 
 static void spike_v1_10_0_board_init(MachineState *machine)
@@ -268,6 +312,8 @@ static void spike_v1_10_0_board_init(MachineState *machine)
     int i;
     unsigned int smp_cpus = machine->smp.cpus;
 
+    s->num_socs = 1;
+
     if (!qtest_enabled()) {
         info_report("The Spike v1.10.0 machine has been deprecated. "
                     "Please use the generic spike machine and specify the ISA "
@@ -275,13 +321,14 @@ static void spike_v1_10_0_board_init(MachineState 
*machine)
     }
 
     /* Initialize SOC */
-    object_initialize_child(OBJECT(machine), "soc", &s->soc, sizeof(s->soc),
+    object_initialize_child(OBJECT(machine), "soc",
+                            &s->soc[0], sizeof(s->soc[0]),
                             TYPE_RISCV_HART_ARRAY, &error_abort, NULL);
-    object_property_set_str(OBJECT(&s->soc), SPIKE_V1_10_0_CPU, "cpu-type",
+    object_property_set_str(OBJECT(&s->soc[0]), SPIKE_V1_10_0_CPU, "cpu-type",
                             &error_abort);
-    object_property_set_int(OBJECT(&s->soc), smp_cpus, "num-harts",
+    object_property_set_int(OBJECT(&s->soc[0]), smp_cpus, "num-harts",
                             &error_abort);
-    object_property_set_bool(OBJECT(&s->soc), true, "realized",
+    object_property_set_bool(OBJECT(&s->soc[0]), true, "realized",
                             &error_abort);
 
     /* register system main memory (actual RAM) */
@@ -339,7 +386,8 @@ static void spike_v1_10_0_board_init(MachineState *machine)
                           &address_space_memory);
 
     /* initialize HTIF using symbols found in load_kernel */
-    htif_mm_init(system_memory, mask_rom, &s->soc.harts[0].env, serial_hd(0));
+    htif_mm_init(system_memory, mask_rom,
+                 &s->soc[0].harts[0].env, serial_hd(0));
 
     /* Core Local Interruptor (timer and IPI) */
     sifive_clint_create(memmap[SPIKE_CLINT].base, memmap[SPIKE_CLINT].size,
@@ -358,6 +406,8 @@ static void spike_v1_09_1_board_init(MachineState *machine)
     int i;
     unsigned int smp_cpus = machine->smp.cpus;
 
+    s->num_socs = 1;
+
     if (!qtest_enabled()) {
         info_report("The Spike v1.09.1 machine has been deprecated. "
                     "Please use the generic spike machine and specify the ISA "
@@ -365,13 +415,14 @@ static void spike_v1_09_1_board_init(MachineState 
*machine)
     }
 
     /* Initialize SOC */
-    object_initialize_child(OBJECT(machine), "soc", &s->soc, sizeof(s->soc),
+    object_initialize_child(OBJECT(machine), "soc",
+                            &s->soc[0], sizeof(s->soc[0]),
                             TYPE_RISCV_HART_ARRAY, &error_abort, NULL);
-    object_property_set_str(OBJECT(&s->soc), SPIKE_V1_09_1_CPU, "cpu-type",
+    object_property_set_str(OBJECT(&s->soc[0]), SPIKE_V1_09_1_CPU, "cpu-type",
                             &error_abort);
-    object_property_set_int(OBJECT(&s->soc), smp_cpus, "num-harts",
+    object_property_set_int(OBJECT(&s->soc[0]), smp_cpus, "num-harts",
                             &error_abort);
-    object_property_set_bool(OBJECT(&s->soc), true, "realized",
+    object_property_set_bool(OBJECT(&s->soc[0]), true, "realized",
                             &error_abort);
 
     /* register system main memory (actual RAM) */
@@ -425,7 +476,7 @@ static void spike_v1_09_1_board_init(MachineState *machine)
         "};\n";
 
     /* build config string with supplied memory size */
-    char *isa = riscv_isa_string(&s->soc.harts[0]);
+    char *isa = riscv_isa_string(&s->soc[0].harts[0]);
     char *config_string = g_strdup_printf(config_string_tmpl,
         (uint64_t)memmap[SPIKE_CLINT].base + SIFIVE_TIME_BASE,
         (uint64_t)memmap[SPIKE_DRAM].base,
@@ -448,7 +499,8 @@ static void spike_v1_09_1_board_init(MachineState *machine)
                           &address_space_memory);
 
     /* initialize HTIF using symbols found in load_kernel */
-    htif_mm_init(system_memory, mask_rom, &s->soc.harts[0].env, serial_hd(0));
+    htif_mm_init(system_memory, mask_rom,
+                 &s->soc[0].harts[0].env, serial_hd(0));
 
     /* Core Local Interruptor (timer and IPI) */
     sifive_clint_create(memmap[SPIKE_CLINT].base, memmap[SPIKE_CLINT].size,
@@ -472,15 +524,62 @@ static void spike_v1_10_0_machine_init(MachineClass *mc)
     mc->max_cpus = 1;
 }
 
-static void spike_machine_init(MachineClass *mc)
+DEFINE_MACHINE("spike_v1.9.1", spike_v1_09_1_machine_init)
+DEFINE_MACHINE("spike_v1.10", spike_v1_10_0_machine_init)
+
+static bool spike_get_multi_socket(Object *obj, Error **errp)
+{
+    SpikeState *s = SPIKE_MACHINE(obj);
+
+    return s->multi_socket;
+}
+
+static void spike_set_multi_socket(Object *obj, bool value, Error **errp)
+{
+    SpikeState *s = SPIKE_MACHINE(obj);
+
+    s->multi_socket = value;
+}
+
+static void spike_machine_instance_init(Object *obj)
 {
-    mc->desc = "RISC-V Spike Board";
+    SpikeState *s = SPIKE_MACHINE(obj);
+
+    /*
+     * Multi-socket is disabled by default so users have to
+     * explicitly enable it from command-line.
+     */
+    s->multi_socket = false;
+    object_property_add_bool(obj, "multi-socket",
+                             spike_get_multi_socket,
+                             spike_set_multi_socket);
+    object_property_set_description(obj, "multi-socket",
+                                    "Set on/off to enable/disable the "
+                                    "multi-socket support");
+}
+
+static void spike_machine_class_init(ObjectClass *oc, void *data)
+{
+    MachineClass *mc = MACHINE_CLASS(oc);
+
+    mc->desc = "RISC-V Spike board";
     mc->init = spike_board_init;
-    mc->max_cpus = 8;
+    mc->max_cpus = SPIKE_CPUS_MAX;
     mc->is_default = true;
     mc->default_cpu_type = SPIKE_V1_10_0_CPU;
 }
 
-DEFINE_MACHINE("spike_v1.9.1", spike_v1_09_1_machine_init)
-DEFINE_MACHINE("spike_v1.10", spike_v1_10_0_machine_init)
-DEFINE_MACHINE("spike", spike_machine_init)
+static const TypeInfo spike_machine_typeinfo = {
+    .name       = MACHINE_TYPE_NAME("spike"),
+    .parent     = TYPE_MACHINE,
+    .class_init = spike_machine_class_init,
+    .instance_init = spike_machine_instance_init,
+    .instance_size = sizeof(SpikeState),
+};
+
+static void spike_machine_init_register_types(void)
+{
+    type_register_static(&spike_machine_typeinfo);
+}
+
+type_init(spike_machine_init_register_types)
diff --git a/include/hw/riscv/spike.h b/include/hw/riscv/spike.h
index dc770421bc..f0ab381a88 100644
--- a/include/hw/riscv/spike.h
+++ b/include/hw/riscv/spike.h
@@ -22,12 +22,21 @@
 #include "hw/riscv/riscv_hart.h"
 #include "hw/sysbus.h"
 
+#define SPIKE_CPUS_MAX 8
+#define SPIKE_SOCKETS_MAX 4
+
+#define TYPE_SPIKE_MACHINE MACHINE_TYPE_NAME("spike")
+#define SPIKE_MACHINE(obj) \
+    OBJECT_CHECK(SpikeState, (obj), TYPE_SPIKE_MACHINE)
+
 typedef struct {
     /*< private >*/
-    SysBusDevice parent_obj;
+    MachineState parent;
 
     /*< public >*/
-    RISCVHartArrayState soc;
+    bool multi_socket;
+    unsigned int num_socs;
+    RISCVHartArrayState soc[SPIKE_SOCKETS_MAX];
     void *fdt;
     int fdt_size;
 } SpikeState;
-- 
2.25.1




reply via email to

[Prev in Thread] Current Thread [Next in Thread]