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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/intercept.c | |
| parent | 3032b925f00ba2653f7695d356d6f8284c82038d (diff) | |
| download | blackbird-op-linux-9ace903d171db7dc2fed96e44ac62b6f4c3ccb3d.tar.gz blackbird-op-linux-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/intercept.c')
| -rw-r--r-- | arch/s390/kvm/intercept.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/arch/s390/kvm/intercept.c b/arch/s390/kvm/intercept.c index 98997ccba501..0732ab4305f4 100644 --- a/arch/s390/kvm/intercept.c +++ b/arch/s390/kvm/intercept.c @@ -128,7 +128,7 @@ static int handle_noop(struct kvm_vcpu *vcpu) static int handle_stop(struct kvm_vcpu *vcpu) { - int rc; + int rc = 0; vcpu->stat.exit_stop_request++; atomic_clear_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); @@ -141,12 +141,18 @@ static int handle_stop(struct kvm_vcpu *vcpu) rc = -ENOTSUPP; } + if (vcpu->arch.local_int.action_bits & ACTION_RELOADVCPU_ON_STOP) { + vcpu->arch.local_int.action_bits &= ~ACTION_RELOADVCPU_ON_STOP; + rc = SIE_INTERCEPT_RERUNVCPU; + vcpu->run->exit_reason = KVM_EXIT_INTR; + } + if (vcpu->arch.local_int.action_bits & ACTION_STOP_ON_STOP) { vcpu->arch.local_int.action_bits &= ~ACTION_STOP_ON_STOP; VCPU_EVENT(vcpu, 3, "%s", "cpu stopped"); rc = -ENOTSUPP; - } else - rc = 0; + } + spin_unlock_bh(&vcpu->arch.local_int.lock); return rc; } |
