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authorAnup Patel <anup.patel@wdc.com>2021-08-31 16:36:03 +0530
committerAlistair Francis <alistair.francis@wdc.com>2021-09-21 07:56:49 +1000
commit954886ea6dd496ad259f8c576a8767e1d7059a28 (patch)
tree259f6165df0c01d2c3ffd0f63c0ee6d94d4540ad /hw/riscv
parent0ffc1a95222f4f7323b8569745f0ef6e71719310 (diff)
hw/riscv: virt: Add optional ACLINT support to virt machine
We extend virt machine to emulate ACLINT devices only when "aclint=on" parameter is passed along with machine name in QEMU command-line. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Message-id: 20210831110603.338681-5-anup.patel@wdc.com Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Diffstat (limited to 'hw/riscv')
-rw-r--r--hw/riscv/virt.c113
1 files changed, 112 insertions, 1 deletions
diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
index 7f716901ef..ec0cb69b8c 100644
--- a/hw/riscv/virt.c
+++ b/hw/riscv/virt.c
@@ -48,6 +48,7 @@ static const MemMapEntry virt_memmap[] = {
[VIRT_TEST] = { 0x100000, 0x1000 },
[VIRT_RTC] = { 0x101000, 0x1000 },
[VIRT_CLINT] = { 0x2000000, 0x10000 },
+ [VIRT_ACLINT_SSWI] = { 0x2F00000, 0x4000 },
[VIRT_PCIE_PIO] = { 0x3000000, 0x10000 },
[VIRT_PLIC] = { 0xc000000, VIRT_PLIC_SIZE(VIRT_CPUS_MAX * 2) },
[VIRT_UART0] = { 0x10000000, 0x100 },
@@ -281,6 +282,82 @@ static void create_fdt_socket_clint(RISCVVirtState *s,
g_free(clint_cells);
}
+static void create_fdt_socket_aclint(RISCVVirtState *s,
+ const MemMapEntry *memmap, int socket,
+ uint32_t *intc_phandles)
+{
+ int cpu;
+ char *name;
+ unsigned long addr;
+ uint32_t aclint_cells_size;
+ uint32_t *aclint_mswi_cells;
+ uint32_t *aclint_sswi_cells;
+ uint32_t *aclint_mtimer_cells;
+ MachineState *mc = MACHINE(s);
+
+ aclint_mswi_cells = g_new0(uint32_t, s->soc[socket].num_harts * 2);
+ aclint_mtimer_cells = g_new0(uint32_t, s->soc[socket].num_harts * 2);
+ aclint_sswi_cells = g_new0(uint32_t, s->soc[socket].num_harts * 2);
+
+ for (cpu = 0; cpu < s->soc[socket].num_harts; cpu++) {
+ aclint_mswi_cells[cpu * 2 + 0] = cpu_to_be32(intc_phandles[cpu]);
+ aclint_mswi_cells[cpu * 2 + 1] = cpu_to_be32(IRQ_M_SOFT);
+ aclint_mtimer_cells[cpu * 2 + 0] = cpu_to_be32(intc_phandles[cpu]);
+ aclint_mtimer_cells[cpu * 2 + 1] = cpu_to_be32(IRQ_M_TIMER);
+ aclint_sswi_cells[cpu * 2 + 0] = cpu_to_be32(intc_phandles[cpu]);
+ aclint_sswi_cells[cpu * 2 + 1] = cpu_to_be32(IRQ_S_SOFT);
+ }
+ aclint_cells_size = s->soc[socket].num_harts * sizeof(uint32_t) * 2;
+
+ addr = memmap[VIRT_CLINT].base + (memmap[VIRT_CLINT].size * socket);
+ name = g_strdup_printf("/soc/mswi@%lx", addr);
+ qemu_fdt_add_subnode(mc->fdt, name);
+ qemu_fdt_setprop_string(mc->fdt, name, "compatible", "riscv,aclint-mswi");
+ qemu_fdt_setprop_cells(mc->fdt, name, "reg",
+ 0x0, addr, 0x0, RISCV_ACLINT_SWI_SIZE);
+ qemu_fdt_setprop(mc->fdt, name, "interrupts-extended",
+ aclint_mswi_cells, aclint_cells_size);
+ qemu_fdt_setprop(mc->fdt, name, "interrupt-controller", NULL, 0);
+ qemu_fdt_setprop_cell(mc->fdt, name, "#interrupt-cells", 0);
+ riscv_socket_fdt_write_id(mc, mc->fdt, name, socket);
+ g_free(name);
+
+ addr = memmap[VIRT_CLINT].base + RISCV_ACLINT_SWI_SIZE +
+ (memmap[VIRT_CLINT].size * socket);
+ name = g_strdup_printf("/soc/mtimer@%lx", addr);
+ qemu_fdt_add_subnode(mc->fdt, name);
+ qemu_fdt_setprop_string(mc->fdt, name, "compatible",
+ "riscv,aclint-mtimer");
+ qemu_fdt_setprop_cells(mc->fdt, name, "reg",
+ 0x0, addr + RISCV_ACLINT_DEFAULT_MTIME,
+ 0x0, memmap[VIRT_CLINT].size - RISCV_ACLINT_SWI_SIZE -
+ RISCV_ACLINT_DEFAULT_MTIME,
+ 0x0, addr + RISCV_ACLINT_DEFAULT_MTIMECMP,
+ 0x0, RISCV_ACLINT_DEFAULT_MTIME);
+ qemu_fdt_setprop(mc->fdt, name, "interrupts-extended",
+ aclint_mtimer_cells, aclint_cells_size);
+ riscv_socket_fdt_write_id(mc, mc->fdt, name, socket);
+ g_free(name);
+
+ addr = memmap[VIRT_ACLINT_SSWI].base +
+ (memmap[VIRT_ACLINT_SSWI].size * socket);
+ name = g_strdup_printf("/soc/sswi@%lx", addr);
+ qemu_fdt_add_subnode(mc->fdt, name);
+ qemu_fdt_setprop_string(mc->fdt, name, "compatible", "riscv,aclint-sswi");
+ qemu_fdt_setprop_cells(mc->fdt, name, "reg",
+ 0x0, addr, 0x0, memmap[VIRT_ACLINT_SSWI].size);
+ qemu_fdt_setprop(mc->fdt, name, "interrupts-extended",
+ aclint_sswi_cells, aclint_cells_size);
+ qemu_fdt_setprop(mc->fdt, name, "interrupt-controller", NULL, 0);
+ qemu_fdt_setprop_cell(mc->fdt, name, "#interrupt-cells", 0);
+ riscv_socket_fdt_write_id(mc, mc->fdt, name, socket);
+ g_free(name);
+
+ g_free(aclint_mswi_cells);
+ g_free(aclint_mtimer_cells);
+ g_free(aclint_sswi_cells);
+}
+
static void create_fdt_socket_plic(RISCVVirtState *s,
const MemMapEntry *memmap, int socket,
uint32_t *phandle, uint32_t *intc_phandles,
@@ -359,7 +436,11 @@ static void create_fdt_sockets(RISCVVirtState *s, const MemMapEntry *memmap,
create_fdt_socket_memory(s, memmap, socket);
- create_fdt_socket_clint(s, memmap, socket, intc_phandles);
+ if (s->have_aclint) {
+ create_fdt_socket_aclint(s, memmap, socket, intc_phandles);
+ } else {
+ create_fdt_socket_clint(s, memmap, socket, intc_phandles);
+ }
create_fdt_socket_plic(s, memmap, socket, phandle,
intc_phandles, xplic_phandles);
@@ -750,6 +831,14 @@ static void virt_machine_init(MachineState *machine)
RISCV_ACLINT_DEFAULT_MTIMECMP, RISCV_ACLINT_DEFAULT_MTIME,
RISCV_ACLINT_DEFAULT_TIMEBASE_FREQ, true);
+ /* Per-socket ACLINT SSWI */
+ if (s->have_aclint) {
+ riscv_aclint_swi_create(
+ memmap[VIRT_ACLINT_SSWI].base +
+ i * memmap[VIRT_ACLINT_SSWI].size,
+ base_hartid, hart_count, true);
+ }
+
/* Per-socket PLIC hart topology configuration string */
plic_hart_config = plic_hart_config_string(hart_count);
@@ -914,6 +1003,22 @@ static void virt_machine_instance_init(Object *obj)
{
}
+static bool virt_get_aclint(Object *obj, Error **errp)
+{
+ MachineState *ms = MACHINE(obj);
+ RISCVVirtState *s = RISCV_VIRT_MACHINE(ms);
+
+ return s->have_aclint;
+}
+
+static void virt_set_aclint(Object *obj, bool value, Error **errp)
+{
+ MachineState *ms = MACHINE(obj);
+ RISCVVirtState *s = RISCV_VIRT_MACHINE(ms);
+
+ s->have_aclint = value;
+}
+
static void virt_machine_class_init(ObjectClass *oc, void *data)
{
MachineClass *mc = MACHINE_CLASS(oc);
@@ -929,6 +1034,12 @@ static void virt_machine_class_init(ObjectClass *oc, void *data)
mc->numa_mem_supported = true;
machine_class_allow_dynamic_sysbus_dev(mc, TYPE_RAMFB_DEVICE);
+
+ object_class_property_add_bool(oc, "aclint", virt_get_aclint,
+ virt_set_aclint);
+ object_class_property_set_description(oc, "aclint",
+ "Set on/off to enable/disable "
+ "emulating ACLINT devices");
}
static const TypeInfo virt_machine_typeinfo = {