Add save and store funtction if irqchip-in-kernel property is enabled,
it is to get/set IPI irqchip state from KVM kernel.
Signed-off-by: Bibo Mao <maob...@loongson.cn>
---
hw/intc/loongarch_ipi.c | 24 ++++++++++++++
hw/intc/loongarch_ipi_kvm.c | 56 +++++++++++++++++++++++++++++++++
include/hw/intc/loongarch_ipi.h | 2 ++
3 files changed, 82 insertions(+)
diff --git a/hw/intc/loongarch_ipi.c b/hw/intc/loongarch_ipi.c
index 5e240382ad..bb28e602fc 100644
--- a/hw/intc/loongarch_ipi.c
+++ b/hw/intc/loongarch_ipi.c
@@ -177,6 +177,28 @@ static void loongarch_ipi_cpu_unplug(HotplugHandler
*hotplug_dev,
core->cpu = NULL;
}
+static int loongarch_ipi_pre_save(void *opaque)
+{
+ LoongarchIPIState *lis = LOONGARCH_IPI(opaque);
+
+ if (kvm_enabled() && lis->irqchip_in_kernel) {
+ return kvm_loongarch_ipi_pre_save(opaque);
+ }
+
+ return 0;
+}
+
+static int loongarch_ipi_post_load(void *opaque, int version_id)
+{
+ LoongarchIPIState *lis = LOONGARCH_IPI(opaque);
+
+ if (kvm_enabled() && lis->irqchip_in_kernel) {
+ return kvm_loongarch_ipi_post_load(opaque, version_id);
+ }
+
+ return 0;
+}
+
static const Property loongarch_ipi_properties[] = {
DEFINE_PROP_BOOL("irqchip-in-kernel", LoongarchIPIState,
irqchip_in_kernel, false),
@@ -199,6 +221,8 @@ static void loongarch_ipi_class_init(ObjectClass *klass,
const void *data)
licc->cpu_by_arch_id = loongarch_cpu_by_arch_id;
hc->plug = loongarch_ipi_cpu_plug;
hc->unplug = loongarch_ipi_cpu_unplug;
+ licc->pre_save = loongarch_ipi_pre_save;
+ licc->post_load = loongarch_ipi_post_load;
}
static const TypeInfo loongarch_ipi_types[] = {
diff --git a/hw/intc/loongarch_ipi_kvm.c b/hw/intc/loongarch_ipi_kvm.c
index e8fcd3bd2f..b5b2b22045 100644
--- a/hw/intc/loongarch_ipi_kvm.c
+++ b/hw/intc/loongarch_ipi_kvm.c
@@ -11,6 +11,62 @@
#include "system/kvm.h"
#include "target/loongarch/cpu.h"
+static void kvm_ipi_access_regs(int fd, uint64_t addr,
+ uint32_t *val, bool write)
+{
+ kvm_device_access(fd, KVM_DEV_LOONGARCH_IPI_GRP_REGS,
+ addr, val, write, &error_abort);
+}
+
+static void kvm_loongarch_ipi_save_load_regs(void *opaque, bool write)
+{
+ LoongsonIPICommonState *ipi = (LoongsonIPICommonState *)opaque;
+ LoongarchIPIState *lis = LOONGARCH_IPI(opaque);
+ IPICore *cpu;
+ uint64_t attr;
+ int cpu_id = 0;
+ int fd = lis->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, write);
+
+ attr = (cpu_id << 16) | CORE_EN_OFF;
+ kvm_ipi_access_regs(fd, attr, &cpu->en, write);
+
+ attr = (cpu_id << 16) | CORE_SET_OFF;
+ kvm_ipi_access_regs(fd, attr, &cpu->set, write);
+
+ attr = (cpu_id << 16) | CORE_CLEAR_OFF;
+ kvm_ipi_access_regs(fd, attr, &cpu->clear, write);
+
+ attr = (cpu_id << 16) | CORE_BUF_20;
+ kvm_ipi_access_regs(fd, attr, &cpu->buf[0], write);
+
+ attr = (cpu_id << 16) | CORE_BUF_28;
+ kvm_ipi_access_regs(fd, attr, &cpu->buf[2], write);
+
+ attr = (cpu_id << 16) | CORE_BUF_30;
+ kvm_ipi_access_regs(fd, attr, &cpu->buf[4], write);
+
+ attr = (cpu_id << 16) | CORE_BUF_38;
+ kvm_ipi_access_regs(fd, attr, &cpu->buf[6], write);
+ }
+}
+
+int kvm_loongarch_ipi_pre_save(void *opaque)
+{
+ kvm_loongarch_ipi_save_load_regs(opaque, false);
+ return 0;
+}
+
+int kvm_loongarch_ipi_post_load(void *opaque, int version_id)
+{
+ kvm_loongarch_ipi_save_load_regs(opaque, true);
+ return 0;
+}
+
void kvm_loongarch_ipi_realize(DeviceState *dev, Error **errp)
{
LoongarchIPIState *lis = LOONGARCH_IPI(dev);
diff --git a/include/hw/intc/loongarch_ipi.h b/include/hw/intc/loongarch_ipi.h
index 26076d8062..921cbb0fb5 100644
--- a/include/hw/intc/loongarch_ipi.h
+++ b/include/hw/intc/loongarch_ipi.h
@@ -27,5 +27,7 @@ struct LoongarchIPIClass {
};
void kvm_loongarch_ipi_realize(DeviceState *dev, Error **errp);
+int kvm_loongarch_ipi_pre_save(void *opaque);
+int kvm_loongarch_ipi_post_load(void *opaque, int version_id);
#endif
--
2.39.3
