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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-01-20 14:01:31 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-01-20 14:01:31 -0300
commitb4b7ff4b08e691656c9d77c758fc355833128ac0 (patch)
tree82fcb00e6b918026dc9f2d1f05ed8eee83874cc0 /arch/s390/kvm/interrupt.c
parent35acfa0fc609f2a2cd95cef4a6a9c3a5c38f1778 (diff)
Linux-libre 4.4-gnupck-4.4-gnu
Diffstat (limited to 'arch/s390/kvm/interrupt.c')
-rw-r--r--arch/s390/kvm/interrupt.c116
1 files changed, 43 insertions, 73 deletions
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index 08de785c9..6a75352f4 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -51,11 +51,9 @@ static int psw_mchk_disabled(struct kvm_vcpu *vcpu)
static int psw_interrupts_disabled(struct kvm_vcpu *vcpu)
{
- if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PER) ||
- (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO) ||
- (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT))
- return 0;
- return 1;
+ return psw_extint_disabled(vcpu) &&
+ psw_ioint_disabled(vcpu) &&
+ psw_mchk_disabled(vcpu);
}
static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu)
@@ -71,13 +69,8 @@ static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu)
static int ckc_irq_pending(struct kvm_vcpu *vcpu)
{
- preempt_disable();
- if (!(vcpu->arch.sie_block->ckc <
- get_tod_clock_fast() + vcpu->arch.sie_block->epoch)) {
- preempt_enable();
+ if (vcpu->arch.sie_block->ckc >= kvm_s390_get_tod_clock_fast(vcpu->kvm))
return 0;
- }
- preempt_enable();
return ckc_interrupts_enabled(vcpu);
}
@@ -109,14 +102,10 @@ static inline u8 int_word_to_isc(u32 int_word)
return (int_word & 0x38000000) >> 27;
}
-static inline unsigned long pending_floating_irqs(struct kvm_vcpu *vcpu)
+static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu)
{
- return vcpu->kvm->arch.float_int.pending_irqs;
-}
-
-static inline unsigned long pending_local_irqs(struct kvm_vcpu *vcpu)
-{
- return vcpu->arch.local_int.pending_irqs;
+ return vcpu->kvm->arch.float_int.pending_irqs |
+ vcpu->arch.local_int.pending_irqs;
}
static unsigned long disable_iscs(struct kvm_vcpu *vcpu,
@@ -135,8 +124,7 @@ static unsigned long deliverable_irqs(struct kvm_vcpu *vcpu)
{
unsigned long active_mask;
- active_mask = pending_local_irqs(vcpu);
- active_mask |= pending_floating_irqs(vcpu);
+ active_mask = pending_irqs(vcpu);
if (!active_mask)
return 0;
@@ -204,7 +192,7 @@ static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag)
static void set_intercept_indicators_io(struct kvm_vcpu *vcpu)
{
- if (!(pending_floating_irqs(vcpu) & IRQ_PEND_IO_MASK))
+ if (!(pending_irqs(vcpu) & IRQ_PEND_IO_MASK))
return;
else if (psw_ioint_disabled(vcpu))
__set_cpuflag(vcpu, CPUSTAT_IO_INT);
@@ -214,7 +202,7 @@ static void set_intercept_indicators_io(struct kvm_vcpu *vcpu)
static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu)
{
- if (!(pending_local_irqs(vcpu) & IRQ_PEND_EXT_MASK))
+ if (!(pending_irqs(vcpu) & IRQ_PEND_EXT_MASK))
return;
if (psw_extint_disabled(vcpu))
__set_cpuflag(vcpu, CPUSTAT_EXT_INT);
@@ -224,7 +212,7 @@ static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu)
static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu)
{
- if (!(pending_local_irqs(vcpu) & IRQ_PEND_MCHK_MASK))
+ if (!(pending_irqs(vcpu) & IRQ_PEND_MCHK_MASK))
return;
if (psw_mchk_disabled(vcpu))
vcpu->arch.sie_block->ictl |= ICTL_LPSW;
@@ -815,23 +803,21 @@ int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu)
int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop)
{
- int rc;
+ if (deliverable_irqs(vcpu))
+ return 1;
- rc = !!deliverable_irqs(vcpu);
-
- if (!rc && kvm_cpu_has_pending_timer(vcpu))
- rc = 1;
+ if (kvm_cpu_has_pending_timer(vcpu))
+ return 1;
/* external call pending and deliverable */
- if (!rc && kvm_s390_ext_call_pending(vcpu) &&
+ if (kvm_s390_ext_call_pending(vcpu) &&
!psw_extint_disabled(vcpu) &&
(vcpu->arch.sie_block->gcr[0] & 0x2000ul))
- rc = 1;
-
- if (!rc && !exclude_stop && kvm_s390_is_stop_irq_pending(vcpu))
- rc = 1;
+ return 1;
- return rc;
+ if (!exclude_stop && kvm_s390_is_stop_irq_pending(vcpu))
+ return 1;
+ return 0;
}
int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
@@ -846,7 +832,7 @@ int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
vcpu->stat.exit_wait_state++;
/* fast path */
- if (kvm_cpu_has_pending_timer(vcpu) || kvm_arch_vcpu_runnable(vcpu))
+ if (kvm_arch_vcpu_runnable(vcpu))
return 0;
if (psw_interrupts_disabled(vcpu)) {
@@ -860,9 +846,7 @@ int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
goto no_timer;
}
- preempt_disable();
- now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch;
- preempt_enable();
+ now = kvm_s390_get_tod_clock_fast(vcpu->kvm);
sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
/* underflow */
@@ -901,9 +885,7 @@ enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer)
u64 now, sltime;
vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer);
- preempt_disable();
- now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch;
- preempt_enable();
+ now = kvm_s390_get_tod_clock_fast(vcpu->kvm);
sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
/*
@@ -981,39 +963,30 @@ static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
irq->u.pgm.code, 0);
- li->irq.pgm = irq->u.pgm;
+ if (irq->u.pgm.code == PGM_PER) {
+ li->irq.pgm.code |= PGM_PER;
+ /* only modify PER related information */
+ li->irq.pgm.per_address = irq->u.pgm.per_address;
+ li->irq.pgm.per_code = irq->u.pgm.per_code;
+ li->irq.pgm.per_atmid = irq->u.pgm.per_atmid;
+ li->irq.pgm.per_access_id = irq->u.pgm.per_access_id;
+ } else if (!(irq->u.pgm.code & PGM_PER)) {
+ li->irq.pgm.code = (li->irq.pgm.code & PGM_PER) |
+ irq->u.pgm.code;
+ /* only modify non-PER information */
+ li->irq.pgm.trans_exc_code = irq->u.pgm.trans_exc_code;
+ li->irq.pgm.mon_code = irq->u.pgm.mon_code;
+ li->irq.pgm.data_exc_code = irq->u.pgm.data_exc_code;
+ li->irq.pgm.mon_class_nr = irq->u.pgm.mon_class_nr;
+ li->irq.pgm.exc_access_id = irq->u.pgm.exc_access_id;
+ li->irq.pgm.op_access_id = irq->u.pgm.op_access_id;
+ } else {
+ li->irq.pgm = irq->u.pgm;
+ }
set_bit(IRQ_PEND_PROG, &li->pending_irqs);
return 0;
}
-int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
-{
- struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
- struct kvm_s390_irq irq;
-
- spin_lock(&li->lock);
- irq.u.pgm.code = code;
- __inject_prog(vcpu, &irq);
- BUG_ON(waitqueue_active(li->wq));
- spin_unlock(&li->lock);
- return 0;
-}
-
-int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
- struct kvm_s390_pgm_info *pgm_info)
-{
- struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
- struct kvm_s390_irq irq;
- int rc;
-
- spin_lock(&li->lock);
- irq.u.pgm = *pgm_info;
- rc = __inject_prog(vcpu, &irq);
- BUG_ON(waitqueue_active(li->wq));
- spin_unlock(&li->lock);
- return rc;
-}
-
static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
{
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
@@ -1393,12 +1366,9 @@ static void __floating_irq_kick(struct kvm *kvm, u64 type)
static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
{
- struct kvm_s390_float_interrupt *fi;
u64 type = READ_ONCE(inti->type);
int rc;
- fi = &kvm->arch.float_int;
-
switch (type) {
case KVM_S390_MCHK:
rc = __inject_float_mchk(kvm, inti);