hw/loongarch/virt: Set iocsr address space per-board rather than percpu

LoongArch system has iocsr address space, most iocsr registers are
per-board, however some iocsr register spaces banked for percpu such
as ipi mailbox and extioi interrupt status. For banked iocsr space,
each cpu has the same iocsr space, but separate data.

This patch changes iocsr address space per-board rather percpu,
for iocsr registers specified for cpu, MemTxAttrs.requester_id
can be parsed for the cpu. With this patches, the total address space
on board will be simple, only iocsr address space and system memory,
rather than the number of cpu and system memory.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Reviewed-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20231215100333.3933632-3-maobibo@loongson.cn>
Signed-off-by: Song Gao <gaosong@loongson.cn>

2 files changed, 46 insertions, 18 deletions

diff --git a/hw/intc/loongarch_extioi.c b/hw/intc/loongarch_extioi.c
index 4fa97f05bd..b37b4abf9d 100644
--- a/hw/intc/loongarch_extioi.c
+++ b/hw/intc/loongarch_extioi.c
@@ -282,9 +282,6 @@ static void loongarch_extioi_instance_init(Object *obj)
     qdev_init_gpio_in(DEVICE(obj), extioi_setirq, EXTIOI_IRQS);
 
     for (cpu = 0; cpu < EXTIOI_CPUS; cpu++) {
-        memory_region_init_io(&s->extioi_iocsr_mem[cpu], OBJECT(s), &extioi_ops,
-                              s, "extioi_iocsr", 0x900);
-        sysbus_init_mmio(dev, &s->extioi_iocsr_mem[cpu]);
         for (pin = 0; pin < LS3A_INTC_IP; pin++) {
             qdev_init_gpio_out(DEVICE(obj), &s->parent_irq[cpu][pin], 1);
         }
diff --git a/hw/intc/loongarch_ipi.c b/hw/intc/loongarch_ipi.c
index 4e104df71b..a184112b09 100644
--- a/hw/intc/loongarch_ipi.c
+++ b/hw/intc/loongarch_ipi.c
@@ -9,6 +9,7 @@
 #include "hw/sysbus.h"
 #include "hw/intc/loongarch_ipi.h"
 #include "hw/irq.h"
+#include "hw/qdev-properties.h"
 #include "qapi/error.h"
 #include "qemu/log.h"
 #include "exec/address-spaces.h"
@@ -26,7 +27,7 @@ static MemTxResult loongarch_ipi_readl(void *opaque, hwaddr addr,
     uint64_t ret = 0;
     int index = 0;
 
-    s = &ipi->ipi_core;
+    s = &ipi->cpu[attrs.requester_id];
     addr &= 0xff;
     switch (addr) {
     case CORE_STATUS_OFF:
@@ -65,7 +66,7 @@ static void send_ipi_data(CPULoongArchState *env, uint64_t val, hwaddr addr,
      * if the mask is 0, we need not to do anything.
      */
     if ((val >> 27) & 0xf) {
-        data = address_space_ldl(&env->address_space_iocsr, addr,
+        data = address_space_ldl(env->address_space_iocsr, addr,
                                  attrs, NULL);
         for (i = 0; i < 4; i++) {
             /* get mask for byte writing */
@@ -77,7 +78,7 @@ static void send_ipi_data(CPULoongArchState *env, uint64_t val, hwaddr addr,
 
     data &= mask;
     data |= (val >> 32) & ~mask;
-    address_space_stl(&env->address_space_iocsr, addr,
+    address_space_stl(env->address_space_iocsr, addr,
                       data, attrs, NULL);
 }
 
@@ -172,7 +173,7 @@ static MemTxResult loongarch_ipi_writel(void *opaque, hwaddr addr, uint64_t val,
     uint8_t vector;
     CPUState *cs;
 
-    s = &ipi->ipi_core;
+    s = &ipi->cpu[attrs.requester_id];
     addr &= 0xff;
     trace_loongarch_ipi_write(size, (uint64_t)addr, val);
     switch (addr) {
@@ -214,7 +215,6 @@ static MemTxResult loongarch_ipi_writel(void *opaque, hwaddr addr, uint64_t val,
 
         /* override requester_id */
         attrs.requester_id = cs->cpu_index;
-        ipi = LOONGARCH_IPI(LOONGARCH_CPU(cs)->env.ipistate);
         loongarch_ipi_writel(ipi, CORE_SET_OFF, BIT(vector), 4, attrs);
         break;
     default:
@@ -265,12 +265,18 @@ static const MemoryRegionOps loongarch_ipi64_ops = {
     .endianness = DEVICE_LITTLE_ENDIAN,
 };
 
-static void loongarch_ipi_init(Object *obj)
+static void loongarch_ipi_realize(DeviceState *dev, Error **errp)
 {
-    LoongArchIPI *s = LOONGARCH_IPI(obj);
-    SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
+    LoongArchIPI *s = LOONGARCH_IPI(dev);
+    SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
+    int i;
+
+    if (s->num_cpu == 0) {
+        error_setg(errp, "num-cpu must be at least 1");
+        return;
+    }
 
-    memory_region_init_io(&s->ipi_iocsr_mem, obj, &loongarch_ipi_ops,
+    memory_region_init_io(&s->ipi_iocsr_mem, OBJECT(dev), &loongarch_ipi_ops,
                           s, "loongarch_ipi_iocsr", 0x48);
 
     /* loongarch_ipi_iocsr performs re-entrant IO through ipi_send */
@@ -278,10 +284,20 @@ static void loongarch_ipi_init(Object *obj)
 
     sysbus_init_mmio(sbd, &s->ipi_iocsr_mem);
 
-    memory_region_init_io(&s->ipi64_iocsr_mem, obj, &loongarch_ipi64_ops,
+    memory_region_init_io(&s->ipi64_iocsr_mem, OBJECT(dev),
+                          &loongarch_ipi64_ops,
                           s, "loongarch_ipi64_iocsr", 0x118);
     sysbus_init_mmio(sbd, &s->ipi64_iocsr_mem);
-    qdev_init_gpio_out(DEVICE(obj), &s->ipi_core.irq, 1);
+
+    s->cpu = g_new0(IPICore, s->num_cpu);
+    if (s->cpu == NULL) {
+        error_setg(errp, "Memory allocation for ExtIOICore faile");
+        return;
+    }
+
+    for (i = 0; i < s->num_cpu; i++) {
+        qdev_init_gpio_out(dev, &s->cpu[i].irq, 1);
+    }
 }
 
 static const VMStateDescription vmstate_ipi_core = {
@@ -300,27 +316,42 @@ static const VMStateDescription vmstate_ipi_core = {
 
 static const VMStateDescription vmstate_loongarch_ipi = {
     .name = TYPE_LOONGARCH_IPI,
-    .version_id = 1,
-    .minimum_version_id = 1,
+    .version_id = 2,
+    .minimum_version_id = 2,
     .fields = (const VMStateField[]) {
-        VMSTATE_STRUCT(ipi_core, LoongArchIPI, 0, vmstate_ipi_core, IPICore),
+        VMSTATE_STRUCT_VARRAY_POINTER_UINT32(cpu, LoongArchIPI, num_cpu,
+                         vmstate_ipi_core, IPICore),
         VMSTATE_END_OF_LIST()
     }
 };
 
+static Property ipi_properties[] = {
+    DEFINE_PROP_UINT32("num-cpu", LoongArchIPI, num_cpu, 1),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
 static void loongarch_ipi_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
+    dc->realize = loongarch_ipi_realize;
+    device_class_set_props(dc, ipi_properties);
     dc->vmsd = &vmstate_loongarch_ipi;
 }
 
+static void loongarch_ipi_finalize(Object *obj)
+{
+    LoongArchIPI *s = LOONGARCH_IPI(obj);
+
+    g_free(s->cpu);
+}
+
 static const TypeInfo loongarch_ipi_info = {
     .name          = TYPE_LOONGARCH_IPI,
     .parent        = TYPE_SYS_BUS_DEVICE,
     .instance_size = sizeof(LoongArchIPI),
-    .instance_init = loongarch_ipi_init,
     .class_init    = loongarch_ipi_class_init,
+    .instance_finalize = loongarch_ipi_finalize,
 };
 
 static void loongarch_ipi_register_types(void)