@@ -90,6 +90,10 @@ config M68K_IRQC
config LOONGSON_IPI
bool
+config LOONGARCH_IPI_KVM
+ bool
+ default y
+
config LOONGARCH_PCH_PIC
bool
select UNIMP
new file mode 100644
@@ -0,0 +1,207 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * LoongArch kvm ipi interrupt support
+ *
+ * Copyright (C) 2024 Loongson Technology Corporation Limited
+ */
+
+#include "qemu/osdep.h"
+#include "hw/qdev-properties.h"
+#include "qemu/typedefs.h"
+#include "hw/intc/loongson_ipi.h"
+#include "hw/sysbus.h"
+#include "linux/kvm.h"
+#include "migration/vmstate.h"
+#include "qapi/error.h"
+#include "sysemu/kvm.h"
+
+#define IPI_DEV_FD_UNDEF -1
+
+static void kvm_ipi_access_regs(int fd, uint64_t addr,
+ uint32_t *val, int is_write)
+{
+ kvm_device_access(fd, KVM_DEV_LOONGARCH_IPI_GRP_REGS,
+ addr, val, is_write, &error_abort);
+}
+
+static int kvm_loongarch_ipi_pre_save(void *opaque)
+{
+ KVMLoongArchIPI *ipi = (KVMLoongArchIPI *)opaque;
+ KVMLoongArchIPIClass *ipi_class = KVM_LOONGARCH_IPI_GET_CLASS(ipi);
+ IPICore *cpu;
+ uint64_t attr;
+ int cpu_id = 0;
+ int fd = ipi_class->dev_fd;
+
+ for (cpu_id = 0; cpu_id < ipi->num_cpu; cpu_id++) {
+ cpu = &ipi->cpu[cpu_id];
+ attr = (cpu_id << 16) | CORE_STATUS_OFF;
+ kvm_ipi_access_regs(fd, attr, &cpu->status, false);
+
+ attr = (cpu_id << 16) | CORE_EN_OFF;
+ kvm_ipi_access_regs(fd, attr, &cpu->en, false);
+
+ attr = (cpu_id << 16) | CORE_SET_OFF;
+ kvm_ipi_access_regs(fd, attr, &cpu->set, false);
+
+ attr = (cpu_id << 16) | CORE_CLEAR_OFF;
+ kvm_ipi_access_regs(fd, attr, &cpu->clear, false);
+
+ attr = (cpu_id << 16) | CORE_BUF_20;
+ kvm_ipi_access_regs(fd, attr, &cpu->buf[0], false);
+
+ attr = (cpu_id << 16) | CORE_BUF_28;
+ kvm_ipi_access_regs(fd, attr, &cpu->buf[2], false);
+
+ attr = (cpu_id << 16) | CORE_BUF_30;
+ kvm_ipi_access_regs(fd, attr, &cpu->buf[4], false);
+
+ attr = (cpu_id << 16) | CORE_BUF_38;
+ kvm_ipi_access_regs(fd, attr, &cpu->buf[6], false);
+ }
+
+ return 0;
+}
+
+static int kvm_loongarch_ipi_post_load(void *opaque, int version_id)
+{
+ KVMLoongArchIPI *ipi = (KVMLoongArchIPI *)opaque;
+ KVMLoongArchIPIClass *ipi_class = KVM_LOONGARCH_IPI_GET_CLASS(ipi);
+ IPICore *cpu;
+ uint64_t attr;
+ int cpu_id = 0;
+ int fd = ipi_class->dev_fd;
+
+ for (cpu_id = 0; cpu_id < ipi->num_cpu; cpu_id++) {
+ cpu = &ipi->cpu[cpu_id];
+ attr = (cpu_id << 16) | CORE_STATUS_OFF;
+ kvm_ipi_access_regs(fd, attr, &cpu->status, true);
+
+ attr = (cpu_id << 16) | CORE_EN_OFF;
+ kvm_ipi_access_regs(fd, attr, &cpu->en, true);
+
+ attr = (cpu_id << 16) | CORE_SET_OFF;
+ kvm_ipi_access_regs(fd, attr, &cpu->set, true);
+
+ attr = (cpu_id << 16) | CORE_CLEAR_OFF;
+ kvm_ipi_access_regs(fd, attr, &cpu->clear, true);
+
+ attr = (cpu_id << 16) | CORE_BUF_20;
+ kvm_ipi_access_regs(fd, attr, &cpu->buf[0], true);
+
+ attr = (cpu_id << 16) | CORE_BUF_28;
+ kvm_ipi_access_regs(fd, attr, &cpu->buf[2], true);
+
+ attr = (cpu_id << 16) | CORE_BUF_30;
+ kvm_ipi_access_regs(fd, attr, &cpu->buf[4], true);
+
+ attr = (cpu_id << 16) | CORE_BUF_38;
+ kvm_ipi_access_regs(fd, attr, &cpu->buf[6], true);
+ }
+
+ return 0;
+}
+
+static void kvm_loongarch_ipi_realize(DeviceState *dev, Error **errp)
+{
+ KVMLoongArchIPI *ipi = KVM_LOONGARCH_IPI(dev);
+ KVMLoongArchIPIClass *ipi_class = KVM_LOONGARCH_IPI_GET_CLASS(dev);
+ struct kvm_create_device cd = {0};
+ Error *err = NULL;
+ int ret;
+
+ if (ipi->num_cpu == 0) {
+ error_setg(errp, "num-cpu must be at least 1");
+ return;
+ }
+
+ ipi_class->parent_realize(dev, &err);
+ if (err) {
+ error_propagate(errp, err);
+ return;
+ }
+
+ ipi->cpu = g_new0(IPICore, ipi->num_cpu);
+ if (ipi->cpu == NULL) {
+ error_setg(errp, "Memory allocation for ExtIOICore faile");
+ return;
+ }
+
+ if (!ipi_class->is_created) {
+ cd.type = KVM_DEV_TYPE_LA_IPI;
+ ret = kvm_vm_ioctl(kvm_state, KVM_CREATE_DEVICE, &cd);
+ if (ret < 0) {
+ error_setg_errno(errp, errno, "Creating the KVM device failed");
+ return;
+ }
+ ipi_class->is_created = true;
+ ipi_class->dev_fd = cd.fd;
+ fprintf(stdout, "Create LoongArch IPI irqchip in KVM done!\n");
+ }
+
+ assert(ipi_class->dev_fd != IPI_DEV_FD_UNDEF);
+}
+
+static Property kvm_loongarch_ipi_properties[] = {
+ DEFINE_PROP_UINT32("num-cpu", KVMLoongArchIPI, num_cpu, 1),
+ DEFINE_PROP_END_OF_LIST()
+};
+
+static const VMStateDescription vmstate_kvm_ipi_core = {
+ .name = "kvm-ipi-single",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(status, IPICore),
+ VMSTATE_UINT32(en, IPICore),
+ VMSTATE_UINT32(set, IPICore),
+ VMSTATE_UINT32(clear, IPICore),
+ VMSTATE_UINT32_ARRAY(buf, IPICore, 8),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static const VMStateDescription vmstate_kvm_loongarch_ipi = {
+ .name = TYPE_KVM_LOONGARCH_IPI,
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .pre_save = kvm_loongarch_ipi_pre_save,
+ .post_load = kvm_loongarch_ipi_post_load,
+ .fields = (VMStateField[]) {
+ VMSTATE_STRUCT_VARRAY_POINTER_UINT32(cpu, KVMLoongArchIPI, num_cpu,
+ vmstate_kvm_ipi_core, IPICore),
+
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static void kvm_loongarch_ipi_class_init(ObjectClass *oc, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(oc);
+ KVMLoongArchIPIClass *ipi_class = KVM_LOONGARCH_IPI_CLASS(oc);
+
+ ipi_class->parent_realize = dc->realize;
+ dc->realize = kvm_loongarch_ipi_realize;
+
+ ipi_class->is_created = false;
+ ipi_class->dev_fd = IPI_DEV_FD_UNDEF;
+
+ device_class_set_props(dc, kvm_loongarch_ipi_properties);
+
+ dc->vmsd = &vmstate_kvm_loongarch_ipi;
+}
+
+static const TypeInfo kvm_loongarch_ipi_info = {
+ .name = TYPE_KVM_LOONGARCH_IPI,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(KVMLoongArchIPI),
+ .class_size = sizeof(KVMLoongArchIPIClass),
+ .class_init = kvm_loongarch_ipi_class_init,
+};
+
+static void kvm_loongarch_ipi_register_types(void)
+{
+ type_register_static(&kvm_loongarch_ipi_info);
+}
+
+type_init(kvm_loongarch_ipi_register_types)
@@ -70,6 +70,7 @@ specific_ss.add(when: ['CONFIG_KVM', 'CONFIG_XIVE'],
if_true: files('spapr_xive_kvm.c'))
specific_ss.add(when: 'CONFIG_M68K_IRQC', if_true: files('m68k_irqc.c'))
specific_ss.add(when: 'CONFIG_LOONGSON_IPI', if_true: files('loongson_ipi.c'))
+specific_ss.add(when: 'CONFIG_LOONGARCH_IPI_KVM', if_true: files('loongarch_ipi_kvm.c'))
specific_ss.add(when: 'CONFIG_LOONGARCH_PCH_PIC', if_true: files('loongarch_pch_pic.c'))
specific_ss.add(when: 'CONFIG_LOONGARCH_PCH_MSI', if_true: files('loongarch_pch_msi.c'))
specific_ss.add(when: 'CONFIG_LOONGARCH_EXTIOI', if_true: files('loongarch_extioi.c'))
@@ -48,6 +48,7 @@
#include "hw/block/flash.h"
#include "hw/virtio/virtio-iommu.h"
#include "qemu/error-report.h"
+#include "sysemu/kvm.h"
static bool virt_is_veiointc_enabled(LoongArchVirtMachineState *lvms)
{
@@ -788,15 +789,32 @@ static void virt_irq_init(LoongArchVirtMachineState *lvms)
*/
/* Create IPI device */
- ipi = qdev_new(TYPE_LOONGSON_IPI);
- qdev_prop_set_uint32(ipi, "num-cpu", ms->smp.cpus);
- sysbus_realize_and_unref(SYS_BUS_DEVICE(ipi), &error_fatal);
-
- /* IPI iocsr memory region */
- memory_region_add_subregion(&lvms->system_iocsr, SMP_IPI_MAILBOX,
- sysbus_mmio_get_region(SYS_BUS_DEVICE(ipi), 0));
- memory_region_add_subregion(&lvms->system_iocsr, MAIL_SEND_ADDR,
- sysbus_mmio_get_region(SYS_BUS_DEVICE(ipi), 1));
+ if (kvm_kernel_irqchip_allowed()) {
+ ipi = qdev_new(TYPE_KVM_LOONGARCH_IPI);
+ qdev_prop_set_int32(ipi, "num-cpu", ms->smp.cpus);
+ sysbus_realize_and_unref(SYS_BUS_DEVICE(ipi), &error_fatal);
+ } else {
+ ipi = qdev_new(TYPE_LOONGSON_IPI);
+ qdev_prop_set_uint32(ipi, "num-cpu", ms->smp.cpus);
+ sysbus_realize_and_unref(SYS_BUS_DEVICE(ipi), &error_fatal);
+
+ /* IPI iocsr memory region */
+ memory_region_add_subregion(&lvms->system_iocsr, SMP_IPI_MAILBOX,
+ sysbus_mmio_get_region(SYS_BUS_DEVICE(ipi), 0));
+ memory_region_add_subregion(&lvms->system_iocsr, MAIL_SEND_ADDR,
+ sysbus_mmio_get_region(SYS_BUS_DEVICE(ipi), 1));
+
+ for (cpu = 0; cpu < ms->smp.cpus; cpu++) {
+ cpu_state = qemu_get_cpu(cpu);
+ cpudev = DEVICE(cpu_state);
+ lacpu = LOONGARCH_CPU(cpu_state);
+ env = &(lacpu->env);
+
+ /* connect ipi irq to cpu irq */
+ qdev_connect_gpio_out(ipi, cpu, qdev_get_gpio_in(cpudev, IRQ_IPI));
+ env->ipistate = ipi;
+ }
+ }
/* Add cpu interrupt-controller */
fdt_add_cpuic_node(lvms, &cpuintc_phandle);
@@ -807,10 +825,6 @@ static void virt_irq_init(LoongArchVirtMachineState *lvms)
lacpu = LOONGARCH_CPU(cpu_state);
env = &(lacpu->env);
env->address_space_iocsr = &lvms->as_iocsr;
-
- /* connect ipi irq to cpu irq */
- qdev_connect_gpio_out(ipi, cpu, qdev_get_gpio_in(cpudev, IRQ_IPI));
- env->ipistate = ipi;
}
/* Create EXTIOI device */
@@ -32,6 +32,7 @@
#define TYPE_LOONGSON_IPI "loongson_ipi"
OBJECT_DECLARE_SIMPLE_TYPE(LoongsonIPI, LOONGSON_IPI)
+#define TYPE_KVM_LOONGARCH_IPI "loongarch-ipi-kvm"
typedef struct IPICore {
LoongsonIPI *ipi;
@@ -53,4 +54,25 @@ struct LoongsonIPI {
IPICore *cpu;
};
+struct KVMLoongArchIPI {
+ SysBusDevice parent_obj;
+ uint32_t num_cpu;
+ IPICore *cpu;
+};
+typedef struct KVMLoongArchIPI KVMLoongArchIPI;
+DECLARE_INSTANCE_CHECKER(KVMLoongArchIPI, KVM_LOONGARCH_IPI,
+ TYPE_KVM_LOONGARCH_IPI)
+
+struct KVMLoongArchIPIClass {
+ SysBusDeviceClass parent_class;
+ DeviceRealize parent_realize;
+
+ bool is_created;
+ int dev_fd;
+
+};
+typedef struct KVMLoongArchIPIClass KVMLoongArchIPIClass;
+DECLARE_CLASS_CHECKERS(KVMLoongArchIPIClass, KVM_LOONGARCH_IPI,
+ TYPE_KVM_LOONGARCH_IPI)
+
#endif
@@ -108,4 +108,5 @@ struct kvm_iocsr_entry {
#define KVM_IRQCHIP_NUM_PINS 64
#define KVM_MAX_CORES 256
+#define KVM_DEV_LOONGARCH_IPI_GRP_REGS 1
#endif /* __UAPI_ASM_LOONGARCH_KVM_H */
@@ -1138,6 +1138,8 @@ enum kvm_device_type {
#define KVM_DEV_TYPE_ARM_PV_TIME KVM_DEV_TYPE_ARM_PV_TIME
KVM_DEV_TYPE_RISCV_AIA,
#define KVM_DEV_TYPE_RISCV_AIA KVM_DEV_TYPE_RISCV_AIA
+ KVM_DEV_TYPE_LA_IPI,
+#define KVM_DEV_TYPE_LA_IPI KVM_DEV_TYPE_LA_IPI
KVM_DEV_TYPE_MAX,
};
@@ -719,6 +719,7 @@ int kvm_arch_get_default_type(MachineState *ms)
int kvm_arch_init(MachineState *ms, KVMState *s)
{
+ s->kernel_irqchip_allowed = false;
cap_has_mp_state = kvm_check_extension(s, KVM_CAP_MP_STATE);
return 0;
}