From: Tianrui Zhao <zhaotianrui@loongson.cn>
Implement loongarch kvm set vcpu interrupt interface,
when a irq is set in vcpu, we use the KVM_INTERRUPT
ioctl to set intr into kvm.
Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn>
Signed-off-by: xianglai li <lixianglai@loongson.cn>
---
target/loongarch/cpu.c | 18 +++++++++++++-----
target/loongarch/kvm-stub.c | 13 +++++++++++++
target/loongarch/kvm.c | 15 +++++++++++++++
target/loongarch/kvm_loongarch.h | 13 +++++++++++++
target/loongarch/trace-events | 1 +
5 files changed, 55 insertions(+), 5 deletions(-)
create mode 100644 target/loongarch/kvm-stub.c
create mode 100644 target/loongarch/kvm_loongarch.h
diff --git a/target/loongarch/cpu.c b/target/loongarch/cpu.c
index 0a4d1a9778..3073f1548d 100644
--- a/target/loongarch/cpu.c
+++ b/target/loongarch/cpu.c
@@ -20,6 +20,11 @@
#include "sysemu/reset.h"
#include "tcg/tcg.h"
#include "vec.h"
+#include "sysemu/kvm.h"
+#include "kvm_loongarch.h"
+#ifdef CONFIG_KVM
+#include <linux/kvm.h>
+#endif
const char * const regnames[32] = {
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
@@ -108,12 +113,15 @@ void loongarch_cpu_set_irq(void *opaque, int irq, int level)
return;
}
- env->CSR_ESTAT = deposit64(env->CSR_ESTAT, irq, 1, level != 0);
-
- if (FIELD_EX64(env->CSR_ESTAT, CSR_ESTAT, IS)) {
- cpu_interrupt(cs, CPU_INTERRUPT_HARD);
+ if (kvm_enabled()) {
+ kvm_loongarch_set_interrupt(cpu, irq, level);
} else {
- cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
+ env->CSR_ESTAT = deposit64(env->CSR_ESTAT, irq, 1, level != 0);
+ if (FIELD_EX64(env->CSR_ESTAT, CSR_ESTAT, IS)) {
+ cpu_interrupt(cs, CPU_INTERRUPT_HARD);
+ } else {
+ cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
+ }
}
}
diff --git a/target/loongarch/kvm-stub.c b/target/loongarch/kvm-stub.c
new file mode 100644
index 0000000000..d38c30ec78
--- /dev/null
+++ b/target/loongarch/kvm-stub.c
@@ -0,0 +1,13 @@
+/*
+ * QEMU KVM LoongArch specific function stubs
+ *
+ * Copyright (c) 2023 Loongson Technology Corporation Limited
+ */
+#include "qemu/osdep.h"
+#include "cpu.h"
+#include "kvm_loongarch.h"
+
+int kvm_loongarch_set_interrupt(LoongArchCPU *cpu, int irq, int level)
+{
+ g_assert_not_reached();
+}
diff --git a/target/loongarch/kvm.c b/target/loongarch/kvm.c
index d2dab3fef4..bd33ec2114 100644
--- a/target/loongarch/kvm.c
+++ b/target/loongarch/kvm.c
@@ -748,6 +748,21 @@ int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
return ret;
}
+int kvm_loongarch_set_interrupt(LoongArchCPU *cpu, int irq, int level)
+{
+ struct kvm_interrupt intr;
+ CPUState *cs = CPU(cpu);
+
+ if (level) {
+ intr.irq = irq;
+ } else {
+ intr.irq = -irq;
+ }
+
+ trace_kvm_set_intr(irq, level);
+ return kvm_vcpu_ioctl(cs, KVM_INTERRUPT, &intr);
+}
+
void kvm_arch_accel_class_init(ObjectClass *oc)
{
}
diff --git a/target/loongarch/kvm_loongarch.h b/target/loongarch/kvm_loongarch.h
new file mode 100644
index 0000000000..cdef980eec
--- /dev/null
+++ b/target/loongarch/kvm_loongarch.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * QEMU LoongArch kvm interface
+ *
+ * Copyright (c) 2023 Loongson Technology Corporation Limited
+ */
+
+#ifndef QEMU_KVM_LOONGARCH_H
+#define QEMU_KVM_LOONGARCH_H
+
+int kvm_loongarch_set_interrupt(LoongArchCPU *cpu, int irq, int level);
+
+#endif
diff --git a/target/loongarch/trace-events b/target/loongarch/trace-events
index 021839880e..dea11edc0f 100644
--- a/target/loongarch/trace-events
+++ b/target/loongarch/trace-events
@@ -12,3 +12,4 @@ kvm_failed_put_counter(const char *msg) "Failed to put counter into KVM: %s"
kvm_failed_get_cpucfg(const char *msg) "Failed to get cpucfg from KVM: %s"
kvm_failed_put_cpucfg(const char *msg) "Failed to put cpucfg into KVM: %s"
kvm_arch_handle_exit(int num) "kvm arch handle exit, the reason number: %d"
+kvm_set_intr(int irq, int level) "kvm set interrupt, irq num: %d, level: %d"
--
2.39.1