hw/riscv/sifive_plic: Use gpios instead of irqs

Instead of creating the interrupt in lines with qemu_allocate_irq() use
qdev_init_gpio_in() as this gives us the ability to use the qdev*gpio*()
helpers later on.
Signed-off-by: NAlistair Francis <alistair.francis@wdc.com>
Suggested-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: NMichael Clark <mjc@sifive.com>

hw/riscv/sifive_e.c

@@ -187,13 +187,14 @@ static void riscv_sifive_e_soc_realize(DeviceState *dev, Error **errp)
     sifive_mmio_emulate(sys_mem, "riscv.sifive.e.gpio0",
         memmap[SIFIVE_E_GPIO0].base, memmap[SIFIVE_E_GPIO0].size);
     sifive_uart_create(sys_mem, memmap[SIFIVE_E_UART0].base,
-        serial_hd(0), SIFIVE_PLIC(s->plic)->irqs[SIFIVE_E_UART0_IRQ]);
+        serial_hd(0), qdev_get_gpio_in(DEVICE(s->plic), SIFIVE_E_UART0_IRQ));
     sifive_mmio_emulate(sys_mem, "riscv.sifive.e.qspi0",
         memmap[SIFIVE_E_QSPI0].base, memmap[SIFIVE_E_QSPI0].size);
     sifive_mmio_emulate(sys_mem, "riscv.sifive.e.pwm0",
         memmap[SIFIVE_E_PWM0].base, memmap[SIFIVE_E_PWM0].size);
     /* sifive_uart_create(sys_mem, memmap[SIFIVE_E_UART1].base,
-        serial_hd(1), SIFIVE_PLIC(s->plic)->irqs[SIFIVE_E_UART1_IRQ]); */
+        serial_hd(1), qdev_get_gpio_in(DEVICE(s->plic),
+                                       SIFIVE_E_UART1_IRQ)); */
     sifive_mmio_emulate(sys_mem, "riscv.sifive.e.qspi1",
         memmap[SIFIVE_E_QSPI1].base, memmap[SIFIVE_E_QSPI1].size);
     sifive_mmio_emulate(sys_mem, "riscv.sifive.e.pwm1",

hw/riscv/sifive_plic.c

@@ -435,7 +435,6 @@ static void sifive_plic_irq_request(void *opaque, int irq, int level)
 static void sifive_plic_realize(DeviceState *dev, Error **errp)
 {
     SiFivePLICState *plic = SIFIVE_PLIC(dev);
-    int i;
 
     memory_region_init_io(&plic->mmio, OBJECT(dev), &sifive_plic_ops, plic,
                           TYPE_SIFIVE_PLIC, plic->aperture_size);
@@ -448,10 +447,7 @@ static void sifive_plic_realize(DeviceState *dev, Error **errp)
     plic->claimed = g_new0(uint32_t, plic->bitfield_words);
     plic->enable = g_new0(uint32_t, plic->bitfield_words * plic->num_addrs);
     sysbus_init_mmio(SYS_BUS_DEVICE(dev), &plic->mmio);
-    plic->irqs = g_new0(qemu_irq, plic->num_sources + 1);
-    for (i = 0; i <= plic->num_sources; i++) {
-        plic->irqs[i] = qemu_allocate_irq(sifive_plic_irq_request, plic, i);
-    }
+    qdev_init_gpio_in(dev, sifive_plic_irq_request, plic->num_sources);
 }
 
 static void sifive_plic_class_init(ObjectClass *klass, void *data)

hw/riscv/sifive_u.c

@@ -317,9 +317,10 @@ static void riscv_sifive_u_soc_realize(DeviceState *dev, Error **errp)
         SIFIVE_U_PLIC_CONTEXT_STRIDE,
         memmap[SIFIVE_U_PLIC].size);
     sifive_uart_create(system_memory, memmap[SIFIVE_U_UART0].base,
-        serial_hd(0), SIFIVE_PLIC(s->plic)->irqs[SIFIVE_U_UART0_IRQ]);
+        serial_hd(0), qdev_get_gpio_in(DEVICE(s->plic), SIFIVE_U_UART0_IRQ));
     /* sifive_uart_create(system_memory, memmap[SIFIVE_U_UART1].base,
-        serial_hd(1), SIFIVE_PLIC(s->plic)->irqs[SIFIVE_U_UART1_IRQ]); */
+        serial_hd(1), qdev_get_gpio_in(DEVICE(s->plic),
+                                       SIFIVE_U_UART1_IRQ)); */
     sifive_clint_create(memmap[SIFIVE_U_CLINT].base,
         memmap[SIFIVE_U_CLINT].size, smp_cpus,
         SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE);

hw/riscv/virt.c

@@ -380,11 +380,11 @@ static void riscv_virt_board_init(MachineState *machine)
     for (i = 0; i < VIRTIO_COUNT; i++) {
         sysbus_create_simple("virtio-mmio",
             memmap[VIRT_VIRTIO].base + i * memmap[VIRT_VIRTIO].size,
-            SIFIVE_PLIC(s->plic)->irqs[VIRTIO_IRQ + i]);
+            qdev_get_gpio_in(DEVICE(s->plic), VIRTIO_IRQ + i));
     }
 
     serial_mm_init(system_memory, memmap[VIRT_UART0].base,
-        0, SIFIVE_PLIC(s->plic)->irqs[UART0_IRQ], 399193,
+        0, qdev_get_gpio_in(DEVICE(s->plic), UART0_IRQ), 399193,
         serial_hd(0), DEVICE_LITTLE_ENDIAN);
 }
 

include/hw/riscv/sifive_plic.h

@@ -56,7 +56,6 @@ typedef struct SiFivePLICState {
     uint32_t *claimed;
     uint32_t *enable;
     QemuMutex lock;
-    qemu_irq *irqs;
 
     /* config */
     char *hart_config;