Merge tag 'pull-loongarch-20250116' of https://gitlab.com/bibo-mao/qemu into staging

loongarch queue

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# gpg: Signature made Wed 15 Jan 2025 20:46:37 EST
# gpg:                using EDDSA key 0D8642A3A2659F80B0B3D1A41F7B0C1251ACE7D1
# gpg: Good signature from "bibo mao <maobibo@loongson.cn>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 7044 3A00 19C0 E97A 31C7  13C4 8E86 8FB7 A176 9D4C
#      Subkey fingerprint: 0D86 42A3 A265 9F80 B0B3  D1A4 1F7B 0C12 51AC E7D1

* tag 'pull-loongarch-20250116' of https://gitlab.com/bibo-mao/qemu:
  hw/intc/loongarch_ipi: Use alternative implemation for cpu_by_arch_id
  hw/intc/loongson_ipi: Add more input parameter for cpu_by_arch_id
  hw/intc/loongarch_ipi: Remove property num-cpu
  hw/intc/loongarch_ipi: Get cpu number from possible_cpu_arch_ids
  hw/intc/loongson_ipi: Remove property num_cpu from loongson_ipi_common
  hw/intc/loongson_ipi: Remove num_cpu from loongson_ipi_common
  hw/intc/loongarch_ipi: Implement realize interface
  target/loongarch: Add page table walker support for debugger usage

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

3 files changed, 104 insertions, 49 deletions

diff --git a/hw/intc/loongarch_ipi.c b/hw/intc/loongarch_ipi.c
index 2ae1a42c46..5376f1e084 100644
--- a/hw/intc/loongarch_ipi.c
+++ b/hw/intc/loongarch_ipi.c
@@ -7,7 +7,9 @@
 
 #include "qemu/osdep.h"
 #include "hw/boards.h"
+#include "qapi/error.h"
 #include "hw/intc/loongarch_ipi.h"
+#include "hw/qdev-properties.h"
 #include "target/loongarch/cpu.h"
 
 static AddressSpace *get_iocsr_as(CPUState *cpu)
@@ -15,44 +17,73 @@ static AddressSpace *get_iocsr_as(CPUState *cpu)
     return LOONGARCH_CPU(cpu)->env.address_space_iocsr;
 }
 
-static int archid_cmp(const void *a, const void *b)
+static int loongarch_ipi_cmp(const void *a, const void *b)
 {
-   CPUArchId *archid_a = (CPUArchId *)a;
-   CPUArchId *archid_b = (CPUArchId *)b;
+   IPICore *ipi_a = (IPICore *)a;
+   IPICore *ipi_b = (IPICore *)b;
 
-   return archid_a->arch_id - archid_b->arch_id;
+   return ipi_a->arch_id - ipi_b->arch_id;
 }
 
-static CPUArchId *find_cpu_by_archid(MachineState *ms, uint32_t id)
+static int loongarch_cpu_by_arch_id(LoongsonIPICommonState *lics,
+                                    int64_t arch_id, int *index, CPUState **pcs)
 {
-    CPUArchId apic_id, *found_cpu;
+    IPICore ipi, *found;
 
-    apic_id.arch_id = id;
-    found_cpu = bsearch(&apic_id, ms->possible_cpus->cpus,
-                        ms->possible_cpus->len,
-                        sizeof(*ms->possible_cpus->cpus),
-                        archid_cmp);
+    ipi.arch_id = arch_id;
+    found = bsearch(&ipi, lics->cpu, lics->num_cpu, sizeof(IPICore),
+                    loongarch_ipi_cmp);
+    if (found && found->cpu) {
+        if (index) {
+            *index = found - lics->cpu;
+        }
 
-    return found_cpu;
+        if (pcs) {
+            *pcs = found->cpu;
+        }
+
+        return MEMTX_OK;
+    }
+
+    return MEMTX_ERROR;
 }
 
-static CPUState *loongarch_cpu_by_arch_id(int64_t arch_id)
+static void loongarch_ipi_realize(DeviceState *dev, Error **errp)
 {
+    LoongsonIPICommonState *lics = LOONGSON_IPI_COMMON(dev);
+    LoongarchIPIClass *lic = LOONGARCH_IPI_GET_CLASS(dev);
     MachineState *machine = MACHINE(qdev_get_machine());
-    CPUArchId *archid;
+    MachineClass *mc = MACHINE_GET_CLASS(machine);
+    const CPUArchIdList *id_list;
+    Error *local_err = NULL;
+    int i;
 
-    archid = find_cpu_by_archid(machine, arch_id);
-    if (archid) {
-        return CPU(archid->cpu);
+    lic->parent_realize(dev, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return;
     }
 
-    return NULL;
+    assert(mc->possible_cpu_arch_ids);
+    id_list = mc->possible_cpu_arch_ids(machine);
+    lics->num_cpu = id_list->len;
+    lics->cpu = g_new0(IPICore, lics->num_cpu);
+    for (i = 0; i < lics->num_cpu; i++) {
+        lics->cpu[i].arch_id = id_list->cpus[i].arch_id;
+        lics->cpu[i].cpu = CPU(id_list->cpus[i].cpu);
+        lics->cpu[i].ipi = lics;
+        qdev_init_gpio_out(dev, &lics->cpu[i].irq, 1);
+    }
 }
 
 static void loongarch_ipi_class_init(ObjectClass *klass, void *data)
 {
     LoongsonIPICommonClass *licc = LOONGSON_IPI_COMMON_CLASS(klass);
+    LoongarchIPIClass *lic = LOONGARCH_IPI_CLASS(klass);
+    DeviceClass *dc = DEVICE_CLASS(klass);
 
+    device_class_set_parent_realize(dc, loongarch_ipi_realize,
+                                    &lic->parent_realize);
     licc->get_iocsr_as = get_iocsr_as;
     licc->cpu_by_arch_id = loongarch_cpu_by_arch_id;
 }
@@ -61,6 +92,8 @@ static const TypeInfo loongarch_ipi_types[] = {
     {
         .name               = TYPE_LOONGARCH_IPI,
         .parent             = TYPE_LOONGSON_IPI_COMMON,
+        .instance_size      = sizeof(LoongarchIPIState),
+        .class_size         = sizeof(LoongarchIPIClass),
         .class_init         = loongarch_ipi_class_init,
     }
 };
diff --git a/hw/intc/loongson_ipi.c b/hw/intc/loongson_ipi.c
index 4e08f03510..d2268a27f8 100644
--- a/hw/intc/loongson_ipi.c
+++ b/hw/intc/loongson_ipi.c
@@ -7,6 +7,7 @@
 
 #include "qemu/osdep.h"
 #include "hw/intc/loongson_ipi.h"
+#include "hw/qdev-properties.h"
 #include "qapi/error.h"
 #include "target/mips/cpu.h"
 
@@ -19,6 +20,27 @@ static AddressSpace *get_iocsr_as(CPUState *cpu)
     return NULL;
 }
 
+static int loongson_cpu_by_arch_id(LoongsonIPICommonState *lics,
+                                   int64_t arch_id, int *index, CPUState **pcs)
+{
+    CPUState *cs;
+
+    cs = cpu_by_arch_id(arch_id);
+    if (cs == NULL) {
+        return MEMTX_ERROR;
+    }
+
+    if (index) {
+        *index = cs->cpu_index;
+    }
+
+    if (pcs) {
+        *pcs = cs;
+    }
+
+    return MEMTX_OK;
+}
+
 static const MemoryRegionOps loongson_ipi_core_ops = {
     .read_with_attrs = loongson_ipi_core_readl,
     .write_with_attrs = loongson_ipi_core_writel,
@@ -36,6 +58,7 @@ static void loongson_ipi_realize(DeviceState *dev, Error **errp)
     LoongsonIPIClass *lic = LOONGSON_IPI_GET_CLASS(dev);
     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
     Error *local_err = NULL;
+    int i;
 
     lic->parent_realize(dev, &local_err);
     if (local_err) {
@@ -43,8 +66,19 @@ static void loongson_ipi_realize(DeviceState *dev, Error **errp)
         return;
     }
 
+    if (sc->num_cpu == 0) {
+        error_setg(errp, "num-cpu must be at least 1");
+        return;
+    }
+
+    sc->cpu = g_new0(IPICore, sc->num_cpu);
+    for (i = 0; i < sc->num_cpu; i++) {
+        sc->cpu[i].ipi = sc;
+        qdev_init_gpio_out(dev, &sc->cpu[i].irq, 1);
+    }
+
     s->ipi_mmio_mem = g_new0(MemoryRegion, sc->num_cpu);
-    for (unsigned i = 0; i < sc->num_cpu; i++) {
+    for (i = 0; i < sc->num_cpu; i++) {
         g_autofree char *name = g_strdup_printf("loongson_ipi_cpu%d_mmio", i);
 
         memory_region_init_io(&s->ipi_mmio_mem[i], OBJECT(dev),
@@ -63,6 +97,10 @@ static void loongson_ipi_unrealize(DeviceState *dev)
     k->parent_unrealize(dev);
 }
 
+static const Property loongson_ipi_properties[] = {
+    DEFINE_PROP_UINT32("num-cpu", LoongsonIPICommonState, num_cpu, 1),
+};
+
 static void loongson_ipi_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -73,8 +111,9 @@ static void loongson_ipi_class_init(ObjectClass *klass, void *data)
                                     &lic->parent_realize);
     device_class_set_parent_unrealize(dc, loongson_ipi_unrealize,
                                       &lic->parent_unrealize);
+    device_class_set_props(dc, loongson_ipi_properties);
     licc->get_iocsr_as = get_iocsr_as;
-    licc->cpu_by_arch_id = cpu_by_arch_id;
+    licc->cpu_by_arch_id = loongson_cpu_by_arch_id;
 }
 
 static const TypeInfo loongson_ipi_types[] = {
diff --git a/hw/intc/loongson_ipi_common.c b/hw/intc/loongson_ipi_common.c
index 9a081565f5..f5ab5024c0 100644
--- a/hw/intc/loongson_ipi_common.c
+++ b/hw/intc/loongson_ipi_common.c
@@ -9,8 +9,6 @@
 #include "hw/sysbus.h"
 #include "hw/intc/loongson_ipi_common.h"
 #include "hw/irq.h"
-#include "hw/qdev-properties.h"
-#include "qapi/error.h"
 #include "qemu/log.h"
 #include "migration/vmstate.h"
 #include "trace.h"
@@ -105,16 +103,17 @@ static MemTxResult mail_send(LoongsonIPICommonState *ipi,
     uint32_t cpuid;
     hwaddr addr;
     CPUState *cs;
+    int cpu, ret;
 
     cpuid = extract32(val, 16, 10);
-    cs = licc->cpu_by_arch_id(cpuid);
-    if (cs == NULL) {
+    ret = licc->cpu_by_arch_id(ipi, cpuid, &cpu, &cs);
+    if (ret != MEMTX_OK) {
         return MEMTX_DECODE_ERROR;
     }
 
     /* override requester_id */
     addr = SMP_IPI_MAILBOX + CORE_BUF_20 + (val & 0x1c);
-    attrs.requester_id = cs->cpu_index;
+    attrs.requester_id = cpu;
     return send_ipi_data(ipi, cs, val, addr, attrs);
 }
 
@@ -125,16 +124,17 @@ static MemTxResult any_send(LoongsonIPICommonState *ipi,
     uint32_t cpuid;
     hwaddr addr;
     CPUState *cs;
+    int cpu, ret;
 
     cpuid = extract32(val, 16, 10);
-    cs = licc->cpu_by_arch_id(cpuid);
-    if (cs == NULL) {
+    ret = licc->cpu_by_arch_id(ipi, cpuid, &cpu, &cs);
+    if (ret != MEMTX_OK) {
         return MEMTX_DECODE_ERROR;
     }
 
     /* override requester_id */
     addr = val & 0xffff;
-    attrs.requester_id = cs->cpu_index;
+    attrs.requester_id = cpu;
     return send_ipi_data(ipi, cs, val, addr, attrs);
 }
 
@@ -148,6 +148,7 @@ MemTxResult loongson_ipi_core_writel(void *opaque, hwaddr addr, uint64_t val,
     uint32_t cpuid;
     uint8_t vector;
     CPUState *cs;
+    int cpu, ret;
 
     addr &= 0xff;
     trace_loongson_ipi_write(size, (uint64_t)addr, val);
@@ -178,11 +179,11 @@ MemTxResult loongson_ipi_core_writel(void *opaque, hwaddr addr, uint64_t val,
         cpuid = extract32(val, 16, 10);
         /* IPI status vector */
         vector = extract8(val, 0, 5);
-        cs = licc->cpu_by_arch_id(cpuid);
-        if (cs == NULL || cs->cpu_index >= ipi->num_cpu) {
+        ret = licc->cpu_by_arch_id(ipi, cpuid, &cpu, &cs);
+        if (ret != MEMTX_OK || cpu >= ipi->num_cpu) {
             return MEMTX_DECODE_ERROR;
         }
-        loongson_ipi_core_writel(&ipi->cpu[cs->cpu_index], CORE_SET_OFF,
+        loongson_ipi_core_writel(&ipi->cpu[cpu], CORE_SET_OFF,
                                  BIT(vector), 4, attrs);
         break;
     default:
@@ -253,12 +254,6 @@ static void loongson_ipi_common_realize(DeviceState *dev, Error **errp)
 {
     LoongsonIPICommonState *s = LOONGSON_IPI_COMMON(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, OBJECT(dev),
                           &loongson_ipi_iocsr_ops,
@@ -273,13 +268,6 @@ static void loongson_ipi_common_realize(DeviceState *dev, Error **errp)
                           &loongson_ipi64_ops,
                           s, "loongson_ipi64_iocsr", 0x118);
     sysbus_init_mmio(sbd, &s->ipi64_iocsr_mem);
-
-    s->cpu = g_new0(IPICore, s->num_cpu);
-    for (i = 0; i < s->num_cpu; i++) {
-        s->cpu[i].ipi = s;
-
-        qdev_init_gpio_out(dev, &s->cpu[i].irq, 1);
-    }
 }
 
 static void loongson_ipi_common_unrealize(DeviceState *dev)
@@ -315,10 +303,6 @@ static const VMStateDescription vmstate_loongson_ipi_common = {
     }
 };
 
-static const Property ipi_common_properties[] = {
-    DEFINE_PROP_UINT32("num-cpu", LoongsonIPICommonState, num_cpu, 1),
-};
-
 static void loongson_ipi_common_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -328,7 +312,6 @@ static void loongson_ipi_common_class_init(ObjectClass *klass, void *data)
                                     &licc->parent_realize);
     device_class_set_parent_unrealize(dc, loongson_ipi_common_unrealize,
                                       &licc->parent_unrealize);
-    device_class_set_props(dc, ipi_common_properties);
     dc->vmsd = &vmstate_loongson_ipi_common;
 }