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| author | Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> | 2009-05-20 15:34:55 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2009-09-10 08:32:42 +0300 |
| commit | 9ace903d171db7dc2fed96e44ac62b6f4c3ccb3d (patch) | |
| tree | 50668cde71950831339d601a3bfeabe49657770e /arch/s390/kvm/kvm-s390.c | |
| parent | 3032b925f00ba2653f7695d356d6f8284c82038d (diff) | |
| download | lwn-9ace903d171db7dc2fed96e44ac62b6f4c3ccb3d.tar.gz lwn-9ace903d171db7dc2fed96e44ac62b6f4c3ccb3d.zip | |
KVM: s390: infrastructure to kick vcpus out of guest state
To ensure vcpu's come out of guest context in certain cases this patch adds a
s390 specific way to kick them out of guest context. Currently it kicks them
out to rerun the vcpu_run path in the s390 code, but the mechanism itself is
expandable and with a new flag we could also add e.g. kicks to userspace etc.
Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/s390/kvm/kvm-s390.c')
| -rw-r--r-- | arch/s390/kvm/kvm-s390.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 90d9d1ba258b..1d65f6277166 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -490,6 +490,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) vcpu_load(vcpu); +rerun_vcpu: /* verify, that memory has been registered */ if (!vcpu->kvm->arch.guest_memsize) { vcpu_put(vcpu); @@ -509,6 +510,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) vcpu->arch.sie_block->gpsw.addr = kvm_run->s390_sieic.addr; break; case KVM_EXIT_UNKNOWN: + case KVM_EXIT_INTR: case KVM_EXIT_S390_RESET: break; default: @@ -522,6 +524,9 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) rc = kvm_handle_sie_intercept(vcpu); } while (!signal_pending(current) && !rc); + if (rc == SIE_INTERCEPT_RERUNVCPU) + goto rerun_vcpu; + if (signal_pending(current) && !rc) rc = -EINTR; |