p71924506
/
linux_old1
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

KVM: s390: clean up interrupt injection in sigp code 

We have all the logic to inject interrupts available in
kvm_s390_inject_vcpu(), so let's use it instead of
injecting irqs manually to the list in sigp code.

SIGP stop is special because we have to check the
action_flags before injecting the interrupt. As
the action_flags are not available in kvm_s390_inject_vcpu()
we leave the code for the stop order code untouched for now.

Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Jens Freimann 2014-05-14 17:14:46 +02:00 committed by Christian Borntraeger
parent a0465f9ae4
commit 22ff4a3366
1 changed files with 18 additions and 38 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

56
arch/s390/kvm/sigp.c
View File

@ -54,33 +54,23 @@ static int __sigp_sense(struct kvm_vcpu *vcpu, u16 cpu_addr,
static int __sigp_emergency(struct kvm_vcpu *vcpu, u16 cpu_addr)
{
struct kvm_s390_local_interrupt *li;
struct kvm_s390_interrupt_info *inti;
struct kvm_s390_interrupt s390int = {
.type = KVM_S390_INT_EMERGENCY,
.parm = vcpu->vcpu_id,
};
struct kvm_vcpu *dst_vcpu = NULL;
int rc = 0;
if (cpu_addr < KVM_MAX_VCPUS)
dst_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr);
if (!dst_vcpu)
return SIGP_CC_NOT_OPERATIONAL;
inti = kzalloc(sizeof(*inti), GFP_KERNEL);
if (!inti)
return -ENOMEM;
rc = kvm_s390_inject_vcpu(dst_vcpu, &s390int);
if (!rc)
VCPU_EVENT(vcpu, 4, "sent sigp emerg to cpu %x", cpu_addr);
inti->type = KVM_S390_INT_EMERGENCY;
inti->emerg.code = vcpu->vcpu_id;
li = &dst_vcpu->arch.local_int;
spin_lock_bh(&li->lock);
list_add_tail(&inti->list, &li->list);
atomic_set(&li->active, 1);
atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
if (waitqueue_active(li->wq))
wake_up_interruptible(li->wq);
spin_unlock_bh(&li->lock);
VCPU_EVENT(vcpu, 4, "sent sigp emerg to cpu %x", cpu_addr);
return SIGP_CC_ORDER_CODE_ACCEPTED;
return rc ? rc : SIGP_CC_ORDER_CODE_ACCEPTED;
}
static int __sigp_conditional_emergency(struct kvm_vcpu *vcpu, u16 cpu_addr,
@ -116,33 +106,23 @@ static int __sigp_conditional_emergency(struct kvm_vcpu *vcpu, u16 cpu_addr,
static int __sigp_external_call(struct kvm_vcpu *vcpu, u16 cpu_addr)
{
struct kvm_s390_local_interrupt *li;
struct kvm_s390_interrupt_info *inti;
struct kvm_s390_interrupt s390int = {
.type = KVM_S390_INT_EXTERNAL_CALL,
.parm = vcpu->vcpu_id,
};
struct kvm_vcpu *dst_vcpu = NULL;
int rc;
if (cpu_addr < KVM_MAX_VCPUS)
dst_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr);
if (!dst_vcpu)
return SIGP_CC_NOT_OPERATIONAL;
inti = kzalloc(sizeof(*inti), GFP_KERNEL);
if (!inti)
return -ENOMEM;
rc = kvm_s390_inject_vcpu(dst_vcpu, &s390int);
if (!rc)
VCPU_EVENT(vcpu, 4, "sent sigp ext call to cpu %x", cpu_addr);
inti->type = KVM_S390_INT_EXTERNAL_CALL;
inti->extcall.code = vcpu->vcpu_id;
li = &dst_vcpu->arch.local_int;
spin_lock_bh(&li->lock);
list_add_tail(&inti->list, &li->list);
atomic_set(&li->active, 1);
atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
if (waitqueue_active(li->wq))
wake_up_interruptible(li->wq);
spin_unlock_bh(&li->lock);
VCPU_EVENT(vcpu, 4, "sent sigp ext call to cpu %x", cpu_addr);
return SIGP_CC_ORDER_CODE_ACCEPTED;
return rc ? rc : SIGP_CC_ORDER_CODE_ACCEPTED;
}
static int __inject_sigp_stop(struct kvm_s390_local_interrupt *li, int action)