diff options
Diffstat (limited to 'arch/s390/kvm/interrupt.c')
-rw-r--r-- | arch/s390/kvm/interrupt.c | 149 |
1 files changed, 101 insertions, 48 deletions
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c index aabf46f..37d06e0 100644 --- a/arch/s390/kvm/interrupt.c +++ b/arch/s390/kvm/interrupt.c @@ -169,8 +169,15 @@ static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu) static int ckc_irq_pending(struct kvm_vcpu *vcpu) { - if (vcpu->arch.sie_block->ckc >= kvm_s390_get_tod_clock_fast(vcpu->kvm)) + const u64 now = kvm_s390_get_tod_clock_fast(vcpu->kvm); + const u64 ckc = vcpu->arch.sie_block->ckc; + + if (vcpu->arch.sie_block->gcr[0] & 0x0020000000000000ul) { + if ((s64)ckc >= (s64)now) + return 0; + } else if (ckc >= now) { return 0; + } return ckc_interrupts_enabled(vcpu); } @@ -187,12 +194,6 @@ 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; @@ -236,10 +237,15 @@ static inline int kvm_s390_gisa_tac_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gis return test_and_clear_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa); } -static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu) +static inline unsigned long pending_irqs_no_gisa(struct kvm_vcpu *vcpu) { return vcpu->kvm->arch.float_int.pending_irqs | - vcpu->arch.local_int.pending_irqs | + vcpu->arch.local_int.pending_irqs; +} + +static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu) +{ + return pending_irqs_no_gisa(vcpu) | kvm_s390_gisa_get_ipm(vcpu->kvm->arch.gisa) << IRQ_PEND_IO_ISC_7; } @@ -337,7 +343,7 @@ static void __reset_intercept_indicators(struct kvm_vcpu *vcpu) static void set_intercept_indicators_io(struct kvm_vcpu *vcpu) { - if (!(pending_irqs(vcpu) & IRQ_PEND_IO_MASK)) + if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_IO_MASK)) return; else if (psw_ioint_disabled(vcpu)) kvm_s390_set_cpuflags(vcpu, CPUSTAT_IO_INT); @@ -385,6 +391,7 @@ static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu) struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; int rc; + vcpu->stat.deliver_cputm++; trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER, 0, 0); @@ -404,6 +411,7 @@ static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu) struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; int rc; + vcpu->stat.deliver_ckc++; trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP, 0, 0); @@ -589,6 +597,7 @@ static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu) trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_MCHK, mchk.cr14, mchk.mcic); + vcpu->stat.deliver_machine_check++; rc = __write_machine_check(vcpu, &mchk); } return rc; @@ -704,7 +713,7 @@ static int __must_check __deliver_prog(struct kvm_vcpu *vcpu) ilen = pgm_info.flags & KVM_S390_PGM_FLAGS_ILC_MASK; VCPU_EVENT(vcpu, 3, "deliver: program irq code 0x%x, ilen:%d", pgm_info.code, ilen); - vcpu->stat.deliver_program_int++; + vcpu->stat.deliver_program++; trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, pgm_info.code, 0); @@ -893,7 +902,7 @@ static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu) VCPU_EVENT(vcpu, 4, "deliver: virtio parm: 0x%x,parm64: 0x%llx", inti->ext.ext_params, inti->ext.ext_params2); - vcpu->stat.deliver_virtio_interrupt++; + vcpu->stat.deliver_virtio++; trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, inti->ext.ext_params, @@ -969,7 +978,7 @@ static int __must_check __deliver_io(struct kvm_vcpu *vcpu, inti->io.subchannel_id >> 1 & 0x3, inti->io.subchannel_nr); - vcpu->stat.deliver_io_int++; + vcpu->stat.deliver_io++; trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, ((__u32)inti->io.subchannel_id << 16) | @@ -998,7 +1007,7 @@ static int __must_check __deliver_io(struct kvm_vcpu *vcpu, VCPU_EVENT(vcpu, 4, "%s isc %u", "deliver: I/O (AI/gisa)", isc); memset(&io, 0, sizeof(io)); io.io_int_word = isc_to_int_word(isc); - vcpu->stat.deliver_io_int++; + vcpu->stat.deliver_io++; trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_IO(1, 0, 0, 0), ((__u32)io.subchannel_id << 16) | @@ -1011,24 +1020,6 @@ out: 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) { @@ -1066,13 +1057,19 @@ int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) static u64 __calculate_sltime(struct kvm_vcpu *vcpu) { - u64 now, cputm, sltime = 0; + const u64 now = kvm_s390_get_tod_clock_fast(vcpu->kvm); + const u64 ckc = vcpu->arch.sie_block->ckc; + u64 cputm, sltime = 0; if (ckc_interrupts_enabled(vcpu)) { - now = kvm_s390_get_tod_clock_fast(vcpu->kvm); - sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now); - /* already expired or overflow? */ - if (!sltime || vcpu->arch.sie_block->ckc <= now) + if (vcpu->arch.sie_block->gcr[0] & 0x0020000000000000ul) { + if ((s64)now < (s64)ckc) + sltime = tod_to_ns((s64)ckc - (s64)now); + } else if (now < ckc) { + sltime = tod_to_ns(ckc - now); + } + /* already expired */ + if (!sltime) return 0; if (cpu_timer_interrupts_enabled(vcpu)) { cputm = kvm_s390_get_cpu_timer(vcpu); @@ -1192,7 +1189,6 @@ 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; @@ -1212,16 +1208,57 @@ 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); } } @@ -1234,6 +1271,7 @@ static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) { struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; + vcpu->stat.inject_program++; VCPU_EVENT(vcpu, 3, "inject: program irq code 0x%x", irq->u.pgm.code); trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, irq->u.pgm.code, 0); @@ -1275,6 +1313,7 @@ static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) { struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; + vcpu->stat.inject_pfault_init++; VCPU_EVENT(vcpu, 4, "inject: pfault init parameter block at 0x%llx", irq->u.ext.ext_params2); trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT, @@ -1293,6 +1332,7 @@ static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) struct kvm_s390_extcall_info *extcall = &li->irq.extcall; uint16_t src_id = irq->u.extcall.code; + vcpu->stat.inject_external_call++; VCPU_EVENT(vcpu, 4, "inject: external call source-cpu:%u", src_id); trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL, @@ -1317,6 +1357,7 @@ static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; struct kvm_s390_prefix_info *prefix = &li->irq.prefix; + vcpu->stat.inject_set_prefix++; VCPU_EVENT(vcpu, 3, "inject: set prefix to %x", irq->u.prefix.address); trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX, @@ -1337,6 +1378,7 @@ static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) struct kvm_s390_stop_info *stop = &li->irq.stop; int rc = 0; + vcpu->stat.inject_stop_signal++; trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0); if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS) @@ -1361,6 +1403,7 @@ static int __inject_sigp_restart(struct kvm_vcpu *vcpu, { struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; + vcpu->stat.inject_restart++; VCPU_EVENT(vcpu, 3, "%s", "inject: restart int"); trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0); @@ -1373,6 +1416,7 @@ static int __inject_sigp_emergency(struct kvm_vcpu *vcpu, { struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; + vcpu->stat.inject_emergency_signal++; VCPU_EVENT(vcpu, 4, "inject: emergency from cpu %u", irq->u.emerg.code); trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY, @@ -1393,6 +1437,7 @@ static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; struct kvm_s390_mchk_info *mchk = &li->irq.mchk; + vcpu->stat.inject_mchk++; VCPU_EVENT(vcpu, 3, "inject: machine check mcic 0x%llx", irq->u.mchk.mcic); trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0, @@ -1423,6 +1468,7 @@ static int __inject_ckc(struct kvm_vcpu *vcpu) { struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; + vcpu->stat.inject_ckc++; VCPU_EVENT(vcpu, 3, "%s", "inject: clock comparator external"); trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP, 0, 0); @@ -1436,6 +1482,7 @@ static int __inject_cpu_timer(struct kvm_vcpu *vcpu) { struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; + vcpu->stat.inject_cputm++; VCPU_EVENT(vcpu, 3, "%s", "inject: cpu timer external"); trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER, 0, 0); @@ -1562,6 +1609,7 @@ static int __inject_service(struct kvm *kvm, { struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; + kvm->stat.inject_service_signal++; spin_lock(&fi->lock); fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_EVENT_PENDING; /* @@ -1587,6 +1635,7 @@ static int __inject_virtio(struct kvm *kvm, { struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; + kvm->stat.inject_virtio++; spin_lock(&fi->lock); if (fi->counters[FIRQ_CNTR_VIRTIO] >= KVM_S390_MAX_VIRTIO_IRQS) { spin_unlock(&fi->lock); @@ -1604,6 +1653,7 @@ static int __inject_pfault_done(struct kvm *kvm, { struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; + kvm->stat.inject_pfault_done++; spin_lock(&fi->lock); if (fi->counters[FIRQ_CNTR_PFAULT] >= (ASYNC_PF_PER_VCPU * KVM_MAX_VCPUS)) { @@ -1623,6 +1673,7 @@ static int __inject_float_mchk(struct kvm *kvm, { struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; + kvm->stat.inject_float_mchk++; spin_lock(&fi->lock); fi->mchk.cr14 |= inti->mchk.cr14 & (1UL << CR_PENDING_SUBCLASS); fi->mchk.mcic |= inti->mchk.mcic; @@ -1638,6 +1689,7 @@ static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti) struct list_head *list; int isc; + kvm->stat.inject_io++; isc = int_word_to_isc(inti->io.io_int_word); if (kvm->arch.gisa && inti->type & KVM_S390_INT_IO_AI_MASK) { @@ -1701,7 +1753,8 @@ static void __floating_irq_kick(struct kvm *kvm, u64 type) kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_STOP_INT); break; case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: - kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_IO_INT); + if (!(type & KVM_S390_INT_IO_AI_MASK && kvm->arch.gisa)) + kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_IO_INT); break; default: kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_EXT_INT); |