lkml.org 
[lkml]   [2023]   [Aug]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH v18 22/30] LoongArch: KVM: Implement handle idle exception
    Date
    Implement kvm handle LoongArch vcpu idle exception, using kvm_vcpu_block
    to emulate it.

    Reviewed-by: Bibo Mao <maobibo@loongson.cn>
    Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn>
    ---
    arch/loongarch/kvm/exit.c | 20 ++++++++++++++++++++
    1 file changed, 20 insertions(+)

    diff --git a/arch/loongarch/kvm/exit.c b/arch/loongarch/kvm/exit.c
    index 32edd915ebcb..30748238c78c 100644
    --- a/arch/loongarch/kvm/exit.c
    +++ b/arch/loongarch/kvm/exit.c
    @@ -188,3 +188,23 @@ int _kvm_complete_iocsr_read(struct kvm_vcpu *vcpu, struct kvm_run *run)

    return er;
    }
    +
    +int _kvm_emu_idle(struct kvm_vcpu *vcpu)
    +{
    + ++vcpu->stat.idle_exits;
    + trace_kvm_exit_idle(vcpu, KVM_TRACE_EXIT_IDLE);
    +
    + if (!kvm_arch_vcpu_runnable(vcpu)) {
    + /*
    + * Switch to the software timer before halt-polling/blocking as
    + * the guest's timer may be a break event for the vCPU, and the
    + * hypervisor timer runs only when the CPU is in guest mode.
    + * Switch before halt-polling so that KVM recognizes an expired
    + * timer before blocking.
    + */
    + kvm_save_timer(vcpu);
    + kvm_vcpu_block(vcpu);
    + }
    +
    + return EMULATE_DONE;
    +}
    --
    2.39.1
    \
     
     \ /
      Last update: 2023-08-03 04:26    [W:7.978 / U:0.080 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site