From: Tianrui Zhao <[email protected]> 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.
Cc: "Michael S. Tsirkin" <[email protected]> Cc: Cornelia Huck <[email protected]> Cc: Paolo Bonzini <[email protected]> Cc: "Marc-André Lureau" <[email protected]> Cc: "Daniel P. Berrangé" <[email protected]> Cc: Thomas Huth <[email protected]> Cc: "Philippe Mathieu-Daudé" <[email protected]> Cc: Richard Henderson <[email protected]> Cc: Peter Maydell <[email protected]> Cc: Bibo Mao <[email protected]> Cc: Song Gao <[email protected]> Cc: Xiaojuan Yang <[email protected]> Cc: Tianrui Zhao <[email protected]> Signed-off-by: Tianrui Zhao <[email protected]> Signed-off-by: xianglai li <[email protected]> --- target/loongarch/cpu.c | 18 +++++++++++++----- target/loongarch/kvm-stub.c | 11 +++++++++++ target/loongarch/kvm.c | 15 +++++++++++++++ target/loongarch/kvm_loongarch.h | 13 +++++++++++++ target/loongarch/trace-events | 1 + 5 files changed, 53 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 61344c7ad2..670612dd0b 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..9965c1f119 --- /dev/null +++ b/target/loongarch/kvm-stub.c @@ -0,0 +1,11 @@ +/* + * QEMU KVM LoongArch specific function stubs + * + * Copyright (c) 2023 Loongson Technology Corporation Limited + */ +#include "cpu.h" + +void 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 0fe52434ed..d1111f8d5f 100644 --- a/target/loongarch/kvm.c +++ b/target/loongarch/kvm.c @@ -574,6 +574,21 @@ 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 6cce653b20..3263406ebe 100644 --- a/target/loongarch/trace-events +++ b/target/loongarch/trace-events @@ -14,3 +14,4 @@ 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
