AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-02 21:36:41 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

KVM: s390: use switch vs jump table in interrupt.c

Browse Source 
Just like for the interception handlers, let's also use a switch-case
in our interrupt delivery code.

Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180206141743.24497-1-david@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
David Hildenbrand 2018-02-06 15:17:43 +01:00 committed by Christian Borntraeger
parent cb7485da3e
commit baabee67f4
1 changed files with 50 additions and 34 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

84
arch/s390/kvm/interrupt.c
View File

@ -187,12 +187,6 @@ static int cpu_timer_irq_pending(struct kvm_vcpu *vcpu)
return kvm_s390_get_cpu_timer(vcpu) >> 63;
}
static inline int is_ioirq(unsigned long irq_type)
{
return ((irq_type >= IRQ_PEND_IO_ISC_7) &&
(irq_type <= IRQ_PEND_IO_ISC_0));
}
static uint64_t isc_to_isc_bits(int isc)
{
return (0x80 >> isc) << 24;
@ -1016,24 +1010,6 @@ static int __must_check __deliver_io(struct kvm_vcpu *vcpu,
return rc;
}
typedef int (*deliver_irq_t)(struct kvm_vcpu *vcpu);
static const deliver_irq_t deliver_irq_funcs[] = {
[IRQ_PEND_MCHK_EX] = __deliver_machine_check,
[IRQ_PEND_MCHK_REP] = __deliver_machine_check,
[IRQ_PEND_PROG] = __deliver_prog,
[IRQ_PEND_EXT_EMERGENCY] = __deliver_emergency_signal,
[IRQ_PEND_EXT_EXTERNAL] = __deliver_external_call,
[IRQ_PEND_EXT_CLOCK_COMP] = __deliver_ckc,
[IRQ_PEND_EXT_CPU_TIMER] = __deliver_cpu_timer,
[IRQ_PEND_RESTART] = __deliver_restart,
[IRQ_PEND_SET_PREFIX] = __deliver_set_prefix,
[IRQ_PEND_PFAULT_INIT] = __deliver_pfault_init,
[IRQ_PEND_EXT_SERVICE] = __deliver_service,
[IRQ_PEND_PFAULT_DONE] = __deliver_pfault_done,
[IRQ_PEND_VIRTIO] = __deliver_virtio,
};
/* Check whether an external call is pending (deliverable or not) */
int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu)
{
@ -1197,7 +1173,6 @@ void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu)
int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
{
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
deliver_irq_t func;
int rc = 0;
unsigned long irq_type;
unsigned long irqs;
@ -1217,16 +1192,57 @@ int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
while ((irqs = deliverable_irqs(vcpu)) && !rc) {
/* bits are in the reverse order of interrupt priority */
irq_type = find_last_bit(&irqs, IRQ_PEND_COUNT);
if (is_ioirq(irq_type)) {
switch (irq_type) {
case IRQ_PEND_IO_ISC_0:
case IRQ_PEND_IO_ISC_1:
case IRQ_PEND_IO_ISC_2:
case IRQ_PEND_IO_ISC_3:
case IRQ_PEND_IO_ISC_4:
case IRQ_PEND_IO_ISC_5:
case IRQ_PEND_IO_ISC_6:
case IRQ_PEND_IO_ISC_7:
rc = __deliver_io(vcpu, irq_type);
} else {
func = deliver_irq_funcs[irq_type];
if (!func) {
WARN_ON_ONCE(func == NULL);
clear_bit(irq_type, &li->pending_irqs);
continue;
}
rc = func(vcpu);
break;
case IRQ_PEND_MCHK_EX:
case IRQ_PEND_MCHK_REP:
rc = __deliver_machine_check(vcpu);
break;
case IRQ_PEND_PROG:
rc = __deliver_prog(vcpu);
break;
case IRQ_PEND_EXT_EMERGENCY:
rc = __deliver_emergency_signal(vcpu);
break;
case IRQ_PEND_EXT_EXTERNAL:
rc = __deliver_external_call(vcpu);
break;
case IRQ_PEND_EXT_CLOCK_COMP:
rc = __deliver_ckc(vcpu);
break;
case IRQ_PEND_EXT_CPU_TIMER:
rc = __deliver_cpu_timer(vcpu);
break;
case IRQ_PEND_RESTART:
rc = __deliver_restart(vcpu);
break;
case IRQ_PEND_SET_PREFIX:
rc = __deliver_set_prefix(vcpu);
break;
case IRQ_PEND_PFAULT_INIT:
rc = __deliver_pfault_init(vcpu);
break;
case IRQ_PEND_EXT_SERVICE:
rc = __deliver_service(vcpu);
break;
case IRQ_PEND_PFAULT_DONE:
rc = __deliver_pfault_done(vcpu);
break;
case IRQ_PEND_VIRTIO:
rc = __deliver_virtio(vcpu);
break;
default:
WARN_ONCE(1, "Unknown pending irq type %ld", irq_type);
clear_bit(irq_type, &li->pending_irqs);
}
}