diff options
| author |   David Hildenbrand <dahi@linux.vnet.ibm.com> | 2014-10-14 15:29:30 +0200 |
|---|---|---|
| committer |   Christian Borntraeger <borntraeger@de.ibm.com> | 2015-01-23 13:25:36 +0100 |
| commit | ea5f496925755bc5e13adbdcfcb841bc2848913b (patch) | |
| tree | dd36477016aef39db6ab17926f0ff488b79ebd5b /arch/s390/kvm/intercept.c | |
| parent | s390/sclp: introduce check for the SIGP Interpretation Facility (diff) | |
| download | linux-dev-ea5f496925755bc5e13adbdcfcb841bc2848913b.tar.xz linux-dev-ea5f496925755bc5e13adbdcfcb841bc2848913b.zip | |
KVM: s390: only one external call may be pending at a time
Only one external call may be pending at a vcpu at a time. For this
reason, we have to detect whether the SIGP externcal call interpretation
facility is available. If so, all external calls have to be injected
using this mechanism.
SIGP EXTERNAL CALL orders have to return whether another external
call is already pending. This check was missing until now.
SIGP SENSE hasn't returned yet in all conditions whether an external
call was pending.
If a SIGP EXTERNAL CALL irq is to be injected and one is already
pending, -EBUSY is returned.
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390/kvm/intercept.c')
| -rw-r--r-- | arch/s390/kvm/intercept.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/s390/kvm/intercept.c b/arch/s390/kvm/intercept.c index 897669454fb0..7c868a991411 100644 --- a/arch/s390/kvm/intercept.c +++ b/arch/s390/kvm/intercept.c @@ -288,11 +288,13 @@ static int handle_external_interrupt(struct kvm_vcpu *vcpu) irq.type = KVM_S390_INT_CPU_TIMER; break; case EXT_IRQ_EXTERNAL_CALL: - if (kvm_s390_si_ext_call_pending(vcpu)) - return 0; irq.type = KVM_S390_INT_EXTERNAL_CALL; irq.u.extcall.code = vcpu->arch.sie_block->extcpuaddr; - break; + rc = kvm_s390_inject_vcpu(vcpu, &irq); + /* ignore if another external call is already pending */ + if (rc == -EBUSY) + return 0; + return rc; default: return -EOPNOTSUPP; } |