| Message ID | 20230609090832.2131037-9-zhaotianrui@loongson.cn (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add KVM LoongArch support | expand |
Reviewed-by: Bibo Mao <maobibo@loongson.cn> Regards Bibo, Mao 在 2023/6/9 17:08, Tianrui Zhao 写道: > Implement vcpu handle exit interface, getting the exit code by ESTAT > register and using kvm exception vector to handle it. > > Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn> > --- > arch/loongarch/kvm/vcpu.c | 45 +++++++++++++++++++++++++++++++++++++++ > 1 file changed, 45 insertions(+) > > diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c > index eba5c07b8be3..a45e9d9efe5b 100644 > --- a/arch/loongarch/kvm/vcpu.c > +++ b/arch/loongarch/kvm/vcpu.c > @@ -52,6 +52,51 @@ static void kvm_pre_enter_guest(struct kvm_vcpu *vcpu) > vcpu->arch.aux_inuse &= ~KVM_LARCH_CSR; > } > > +/* > + * Return 1 for resume guest and "<= 0" for resume host. > + */ > +static int _kvm_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu) > +{ > + unsigned long exst = vcpu->arch.host_estat; > + u32 intr = exst & 0x1fff; /* ignore NMI */ > + u32 exccode = (exst & CSR_ESTAT_EXC) >> CSR_ESTAT_EXC_SHIFT; > + int ret = RESUME_GUEST; > + > + vcpu->mode = OUTSIDE_GUEST_MODE; > + > + /* Set a default exit reason */ > + run->exit_reason = KVM_EXIT_UNKNOWN; > + > + local_irq_enable(); > + guest_state_exit_irqoff(); > + > + trace_kvm_exit(vcpu, exccode); > + if (exccode) { > + ret = _kvm_handle_fault(vcpu, exccode); > + } else { > + WARN(!intr, "vm exiting with suspicious irq\n"); > + ++vcpu->stat.int_exits; > + } > + > + cond_resched(); > + local_irq_disable(); > + > + if (ret == RESUME_HOST) > + return ret; > + > + /* Only check for signals if not already exiting to userspace */ > + if (signal_pending(current)) { > + vcpu->run->exit_reason = KVM_EXIT_INTR; > + ++vcpu->stat.signal_exits; > + return -EINTR; > + } > + > + kvm_pre_enter_guest(vcpu); > + trace_kvm_reenter(vcpu); > + guest_state_enter_irqoff(); > + return RESUME_GUEST; > +} > + > int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu) > { > unsigned long timer_hz;
diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c index eba5c07b8be3..a45e9d9efe5b 100644 --- a/arch/loongarch/kvm/vcpu.c +++ b/arch/loongarch/kvm/vcpu.c @@ -52,6 +52,51 @@ static void kvm_pre_enter_guest(struct kvm_vcpu *vcpu) vcpu->arch.aux_inuse &= ~KVM_LARCH_CSR; } +/* + * Return 1 for resume guest and "<= 0" for resume host. + */ +static int _kvm_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu) +{ + unsigned long exst = vcpu->arch.host_estat; + u32 intr = exst & 0x1fff; /* ignore NMI */ + u32 exccode = (exst & CSR_ESTAT_EXC) >> CSR_ESTAT_EXC_SHIFT; + int ret = RESUME_GUEST; + + vcpu->mode = OUTSIDE_GUEST_MODE; + + /* Set a default exit reason */ + run->exit_reason = KVM_EXIT_UNKNOWN; + + local_irq_enable(); + guest_state_exit_irqoff(); + + trace_kvm_exit(vcpu, exccode); + if (exccode) { + ret = _kvm_handle_fault(vcpu, exccode); + } else { + WARN(!intr, "vm exiting with suspicious irq\n"); + ++vcpu->stat.int_exits; + } + + cond_resched(); + local_irq_disable(); + + if (ret == RESUME_HOST) + return ret; + + /* Only check for signals if not already exiting to userspace */ + if (signal_pending(current)) { + vcpu->run->exit_reason = KVM_EXIT_INTR; + ++vcpu->stat.signal_exits; + return -EINTR; + } + + kvm_pre_enter_guest(vcpu); + trace_kvm_reenter(vcpu); + guest_state_enter_irqoff(); + return RESUME_GUEST; +} + int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu) { unsigned long timer_hz;
Implement vcpu handle exit interface, getting the exit code by ESTAT register and using kvm exception vector to handle it. Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn> --- arch/loongarch/kvm/vcpu.c | 45 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+)