diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index 96b8a67ddaf8..dc182a5b02b7 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -32,8 +32,10 @@ #define KVM_NR_IRQCHIPS 1 #define KVM_IRQCHIP_NUM_PINS 4096 +#define SIGP_CTRL_C 0x00800000 + struct sca_entry { - atomic_t scn; + atomic_t ctrl; __u32 reserved; __u64 sda; __u64 reserved2[2]; diff --git a/arch/s390/kvm/intercept.c b/arch/s390/kvm/intercept.c index 147b87fefecd..a0b586c1913c 100644 --- a/arch/s390/kvm/intercept.c +++ b/arch/s390/kvm/intercept.c @@ -272,6 +272,8 @@ 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.parm = vcpu->arch.sie_block->extcpuaddr; break; @@ -323,6 +325,8 @@ static int handle_partial_execution(struct kvm_vcpu *vcpu) { if (vcpu->arch.sie_block->ipa == 0xb254) /* MVPG */ return handle_mvpg_pei(vcpu); + if (vcpu->arch.sie_block->ipa >> 8 == 0xae) /* SIGP */ + return kvm_s390_handle_sigp_pei(vcpu); return -EOPNOTSUPP; } diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c index 75cd3217cd5a..bf0d9bc15bcd 100644 --- a/arch/s390/kvm/interrupt.c +++ b/arch/s390/kvm/interrupt.c @@ -148,9 +148,8 @@ static void __unset_cpu_idle(struct kvm_vcpu *vcpu) static void __reset_intercept_indicators(struct kvm_vcpu *vcpu) { - atomic_clear_mask(CPUSTAT_ECALL_PEND | - CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT, - &vcpu->arch.sie_block->cpuflags); + atomic_clear_mask(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT, + &vcpu->arch.sie_block->cpuflags); vcpu->arch.sie_block->lctl = 0x0000; vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT); @@ -524,6 +523,20 @@ static void deliver_ckc_interrupt(struct kvm_vcpu *vcpu) } } +/* Check whether SIGP interpretation facility has an external call pending */ +int kvm_s390_si_ext_call_pending(struct kvm_vcpu *vcpu) +{ + atomic_t *sigp_ctrl = &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].ctrl; + + if (!psw_extint_disabled(vcpu) && + (vcpu->arch.sie_block->gcr[0] & 0x2000ul) && + (atomic_read(sigp_ctrl) & SIGP_CTRL_C) && + (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_ECALL_PEND)) + return 1; + + return 0; +} + int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu) { struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; @@ -554,6 +567,9 @@ int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu) if (!rc && kvm_cpu_has_pending_timer(vcpu)) rc = 1; + if (!rc && kvm_s390_si_ext_call_pending(vcpu)) + rc = 1; + return rc; } @@ -610,7 +626,8 @@ int kvm_s390_handle_wait(struct kvm_vcpu *vcpu) while (list_empty(&vcpu->arch.local_int.list) && list_empty(&vcpu->arch.local_int.float_int->list) && (!vcpu->arch.local_int.timer_due) && - !signal_pending(current)) { + !signal_pending(current) && + !kvm_s390_si_ext_call_pending(vcpu)) { set_current_state(TASK_INTERRUPTIBLE); spin_unlock_bh(&vcpu->arch.local_int.lock); spin_unlock(&vcpu->arch.local_int.float_int->lock); @@ -667,6 +684,11 @@ void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu) } atomic_set(&li->active, 0); spin_unlock_bh(&li->lock); + + /* clear pending external calls set by sigp interpretation facility */ + atomic_clear_mask(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags); + atomic_clear_mask(SIGP_CTRL_C, + &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].ctrl); } void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu) diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index d91feb2f03ea..2c243124a4e2 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -633,7 +633,7 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) vcpu->arch.sie_block->ecb |= 0x10; vcpu->arch.sie_block->ecb2 = 8; - vcpu->arch.sie_block->eca = 0xC1002000U; + vcpu->arch.sie_block->eca = 0xD1002000U; if (sclp_has_siif()) vcpu->arch.sie_block->eca |= 1; vcpu->arch.sie_block->fac = (int) (long) vfacilities; diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h index e489945921ac..87edfc919db9 100644 --- a/arch/s390/kvm/kvm-s390.h +++ b/arch/s390/kvm/kvm-s390.h @@ -154,6 +154,7 @@ int kvm_s390_handle_eb(struct kvm_vcpu *vcpu); /* implemented in sigp.c */ int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu); +int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu); /* implemented in kvm-s390.c */ long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable); @@ -214,6 +215,7 @@ static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc) int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu); int psw_extint_disabled(struct kvm_vcpu *vcpu); void kvm_s390_destroy_adapters(struct kvm *kvm); +int kvm_s390_si_ext_call_pending(struct kvm_vcpu *vcpu); /* implemented in guestdbg.c */ void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu); diff --git a/arch/s390/kvm/sigp.c b/arch/s390/kvm/sigp.c index c0b99e0f6b63..d0341d2e54b1 100644 --- a/arch/s390/kvm/sigp.c +++ b/arch/s390/kvm/sigp.c @@ -458,3 +458,38 @@ int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu) kvm_s390_set_psw_cc(vcpu, rc); return 0; } + +/* + * Handle SIGP partial execution interception. + * + * This interception will occur at the source cpu when a source cpu sends an + * external call to a target cpu and the target cpu has the WAIT bit set in + * its cpuflags. Interception will occurr after the interrupt indicator bits at + * the target cpu have been set. All error cases will lead to instruction + * interception, therefore nothing is to be checked or prepared. + */ +int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu) +{ + int r3 = vcpu->arch.sie_block->ipa & 0x000f; + u16 cpu_addr = vcpu->run->s.regs.gprs[r3]; + struct kvm_vcpu *dest_vcpu; + u8 order_code = kvm_s390_get_base_disp_rs(vcpu); + + trace_kvm_s390_handle_sigp_pei(vcpu, order_code, cpu_addr); + + if (order_code == SIGP_EXTERNAL_CALL) { + dest_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr); + BUG_ON(dest_vcpu == NULL); + + spin_lock_bh(&dest_vcpu->arch.local_int.lock); + if (waitqueue_active(&dest_vcpu->wq)) + wake_up_interruptible(&dest_vcpu->wq); + dest_vcpu->preempted = true; + spin_unlock_bh(&dest_vcpu->arch.local_int.lock); + + kvm_s390_set_psw_cc(vcpu, SIGP_CC_ORDER_CODE_ACCEPTED); + return 0; + } + + return -EOPNOTSUPP; +} diff --git a/arch/s390/kvm/trace.h b/arch/s390/kvm/trace.h index 579b42afab40..916834d7a73a 100644 --- a/arch/s390/kvm/trace.h +++ b/arch/s390/kvm/trace.h @@ -239,6 +239,29 @@ TRACE_EVENT(kvm_s390_handle_sigp, __entry->cpu_addr, __entry->parameter) ); +TRACE_EVENT(kvm_s390_handle_sigp_pei, + TP_PROTO(VCPU_PROTO_COMMON, __u8 order_code, __u16 cpu_addr), + TP_ARGS(VCPU_ARGS_COMMON, order_code, cpu_addr), + + TP_STRUCT__entry( + VCPU_FIELD_COMMON + __field(__u8, order_code) + __field(__u16, cpu_addr) + ), + + TP_fast_assign( + VCPU_ASSIGN_COMMON + __entry->order_code = order_code; + __entry->cpu_addr = cpu_addr; + ), + + VCPU_TP_PRINTK("handle sigp pei order %02x (%s), cpu address %04x", + __entry->order_code, + __print_symbolic(__entry->order_code, + sigp_order_codes), + __entry->cpu_addr) + ); + TRACE_EVENT(kvm_s390_handle_diag, TP_PROTO(VCPU_PROTO_COMMON, __u16 code), TP_ARGS(VCPU_ARGS_COMMON, code),