[PULL,5/8] KVM: s390: get rid of local_int array

Message ID	1393932438-58848-6-git-send-email-borntraeger@de.ibm.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <kvm-owner@kernel.org> Gateway: Authorized Use Only! Violators will be prosecuted for <kvm@vger.kernel.org> from <borntraeger@de.ibm.com>; Tue, 4 Mar 2014 11:27:02 -0000 Gateway: Authorized Use Only! Violators will be prosecuted; Tue, 4 Mar 2014 11:26:59 -0000 From: Christian Borntraeger <borntraeger@de.ibm.com> To: Paolo Bonzini <pbonzini@redhat.com> Cc: Gleb Natapov <gleb@kernel.org>, KVM <kvm@vger.kernel.org>, linux-s390 <linux-s390@vger.kernel.org>, Cornelia Huck <cornelia.huck@de.ibm.com>, Martin Schwidefsky <schwidefsky@de.ibm.com>, Heinz Graalfs <graalfs@linux.vnet.ibm.com>, Thomas Huth <thuth@linux.vnet.ibm.com>, Jens Freimann <jfrei@linux.vnet.ibm.com>, Christian Borntraeger <borntraeger@de.ibm.com> Subject: [PULL 5/8] KVM: s390: get rid of local_int array Date: Tue, 4 Mar 2014 12:27:15 +0100 Message-Id: <1393932438-58848-6-git-send-email-borntraeger@de.ibm.com> In-Reply-To: <1393932438-58848-1-git-send-email-borntraeger@de.ibm.com> References: <1393932438-58848-1-git-send-email-borntraeger@de.ibm.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk

diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index 062b78c..734d302 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -215,7 +215,6 @@ struct kvm_s390_float_interrupt { int next_rr_cpu; unsigned long idle_mask[(KVM_MAX_VCPUS + sizeof(long) - 1) / sizeof(long)]; - struct kvm_s390_local_interrupt *local_int[KVM_MAX_VCPUS]; unsigned int irq_count; }; diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c index fff070b..1d0f9d5 100644 --- a/arch/s390/kvm/interrupt.c +++ b/arch/s390/kvm/interrupt.c @@ -692,6 +692,7 @@ static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti) struct kvm_s390_local_interrupt *li; struct kvm_s390_float_interrupt *fi; struct kvm_s390_interrupt_info *iter; + struct kvm_vcpu *dst_vcpu = NULL; int sigcpu; int rc = 0; @@ -726,9 +727,10 @@ static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti) sigcpu = fi->next_rr_cpu++; if (sigcpu == KVM_MAX_VCPUS) sigcpu = fi->next_rr_cpu = 0; - } while (fi->local_int[sigcpu] == NULL); + } while (kvm_get_vcpu(kvm, sigcpu) == NULL); } - li = fi->local_int[sigcpu]; + dst_vcpu = kvm_get_vcpu(kvm, sigcpu); + li = &dst_vcpu->arch.local_int; spin_lock_bh(&li->lock); atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); if (waitqueue_active(li->wq)) diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index a3e4c07..9136f8d 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -460,11 +460,8 @@ struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, spin_lock_init(&vcpu->arch.local_int.lock); INIT_LIST_HEAD(&vcpu->arch.local_int.list); vcpu->arch.local_int.float_int = &kvm->arch.float_int; - spin_lock(&kvm->arch.float_int.lock); - kvm->arch.float_int.local_int[id] = &vcpu->arch.local_int; vcpu->arch.local_int.wq = &vcpu->wq; vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; - spin_unlock(&kvm->arch.float_int.lock); rc = kvm_vcpu_init(vcpu, kvm, id); if (rc) @@ -952,7 +949,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); - BUG_ON(vcpu->kvm->arch.float_int.local_int[vcpu->vcpu_id] == NULL); + BUG_ON(kvm_get_vcpu(vcpu->kvm, vcpu->vcpu_id) == NULL); switch (kvm_run->exit_reason) { case KVM_EXIT_S390_SIEIC: diff --git a/arch/s390/kvm/sigp.c b/arch/s390/kvm/sigp.c index 466eefa..3fe44c4 100644 --- a/arch/s390/kvm/sigp.c +++ b/arch/s390/kvm/sigp.c @@ -23,29 +23,30 @@ static int __sigp_sense(struct kvm_vcpu *vcpu, u16 cpu_addr, u64 *reg) { - struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; + struct kvm_s390_local_interrupt *li; + struct kvm_vcpu *dst_vcpu = NULL; + int cpuflags; int rc; if (cpu_addr >= KVM_MAX_VCPUS) return SIGP_CC_NOT_OPERATIONAL; - spin_lock(&fi->lock); - if (fi->local_int[cpu_addr] == NULL) - rc = SIGP_CC_NOT_OPERATIONAL; - else if (!(atomic_read(fi->local_int[cpu_addr]->cpuflags) - & (CPUSTAT_ECALL_PEND | CPUSTAT_STOPPED))) + dst_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr); + if (!dst_vcpu) + return SIGP_CC_NOT_OPERATIONAL; + li = &dst_vcpu->arch.local_int; + + cpuflags = atomic_read(li->cpuflags); + if (!(cpuflags & (CPUSTAT_ECALL_PEND | CPUSTAT_STOPPED))) rc = SIGP_CC_ORDER_CODE_ACCEPTED; else { *reg &= 0xffffffff00000000UL; - if (atomic_read(fi->local_int[cpu_addr]->cpuflags) - & CPUSTAT_ECALL_PEND) + if (cpuflags & CPUSTAT_ECALL_PEND) *reg |= SIGP_STATUS_EXT_CALL_PENDING; - if (atomic_read(fi->local_int[cpu_addr]->cpuflags) - & CPUSTAT_STOPPED) + if (cpuflags & CPUSTAT_STOPPED) *reg |= SIGP_STATUS_STOPPED; rc = SIGP_CC_STATUS_STORED; } - spin_unlock(&fi->lock); VCPU_EVENT(vcpu, 4, "sensed status of cpu %x rc %x", cpu_addr, rc); return rc; @@ -53,10 +54,9 @@ 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_float_interrupt *fi = &vcpu->kvm->arch.float_int; struct kvm_s390_local_interrupt *li; struct kvm_s390_interrupt_info *inti; - int rc; + struct kvm_vcpu *dst_vcpu = NULL; if (cpu_addr >= KVM_MAX_VCPUS) return SIGP_CC_NOT_OPERATIONAL; @@ -68,13 +68,10 @@ static int __sigp_emergency(struct kvm_vcpu *vcpu, u16 cpu_addr) inti->type = KVM_S390_INT_EMERGENCY; inti->emerg.code = vcpu->vcpu_id; - spin_lock(&fi->lock); - li = fi->local_int[cpu_addr]; - if (li == NULL) { - rc = SIGP_CC_NOT_OPERATIONAL; - kfree(inti); - goto unlock; - } + dst_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr); + if (!dst_vcpu) + return SIGP_CC_NOT_OPERATIONAL; + li = &dst_vcpu->arch.local_int; spin_lock_bh(&li->lock); list_add_tail(&inti->list, &li->list); atomic_set(&li->active, 1); @@ -82,11 +79,9 @@ static int __sigp_emergency(struct kvm_vcpu *vcpu, u16 cpu_addr) if (waitqueue_active(li->wq)) wake_up_interruptible(li->wq); spin_unlock_bh(&li->lock); - rc = SIGP_CC_ORDER_CODE_ACCEPTED; VCPU_EVENT(vcpu, 4, "sent sigp emerg to cpu %x", cpu_addr); -unlock: - spin_unlock(&fi->lock); - return rc; + + return SIGP_CC_ORDER_CODE_ACCEPTED; } static int __sigp_conditional_emergency(struct kvm_vcpu *vcpu, u16 cpu_addr, @@ -122,10 +117,9 @@ 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_float_interrupt *fi = &vcpu->kvm->arch.float_int; struct kvm_s390_local_interrupt *li; struct kvm_s390_interrupt_info *inti; - int rc; + struct kvm_vcpu *dst_vcpu = NULL; if (cpu_addr >= KVM_MAX_VCPUS) return SIGP_CC_NOT_OPERATIONAL; @@ -137,13 +131,10 @@ static int __sigp_external_call(struct kvm_vcpu *vcpu, u16 cpu_addr) inti->type = KVM_S390_INT_EXTERNAL_CALL; inti->extcall.code = vcpu->vcpu_id; - spin_lock(&fi->lock); - li = fi->local_int[cpu_addr]; - if (li == NULL) { - rc = SIGP_CC_NOT_OPERATIONAL; - kfree(inti); - goto unlock; - } + dst_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr); + if (!dst_vcpu) + return SIGP_CC_NOT_OPERATIONAL; + li = &dst_vcpu->arch.local_int; spin_lock_bh(&li->lock); list_add_tail(&inti->list, &li->list); atomic_set(&li->active, 1); @@ -151,11 +142,9 @@ static int __sigp_external_call(struct kvm_vcpu *vcpu, u16 cpu_addr) if (waitqueue_active(li->wq)) wake_up_interruptible(li->wq); spin_unlock_bh(&li->lock); - rc = SIGP_CC_ORDER_CODE_ACCEPTED; VCPU_EVENT(vcpu, 4, "sent sigp ext call to cpu %x", cpu_addr); -unlock: - spin_unlock(&fi->lock); - return rc; + + return SIGP_CC_ORDER_CODE_ACCEPTED; } static int __inject_sigp_stop(struct kvm_s390_local_interrupt *li, int action) @@ -189,31 +178,26 @@ out: static int __sigp_stop(struct kvm_vcpu *vcpu, u16 cpu_addr, int action) { - struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; struct kvm_s390_local_interrupt *li; + struct kvm_vcpu *dst_vcpu = NULL; int rc; if (cpu_addr >= KVM_MAX_VCPUS) return SIGP_CC_NOT_OPERATIONAL; - spin_lock(&fi->lock); - li = fi->local_int[cpu_addr]; - if (li == NULL) { - rc = SIGP_CC_NOT_OPERATIONAL; - goto unlock; - } + dst_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr); + if (!dst_vcpu) + return SIGP_CC_NOT_OPERATIONAL; + li = &dst_vcpu->arch.local_int; rc = __inject_sigp_stop(li, action); -unlock: - spin_unlock(&fi->lock); VCPU_EVENT(vcpu, 4, "sent sigp stop to cpu %x", cpu_addr); if ((action & ACTION_STORE_ON_STOP) != 0 && rc == -ESHUTDOWN) { /* If the CPU has already been stopped, we still have * to save the status when doing stop-and-store. This * has to be done after unlocking all spinlocks. */ - struct kvm_vcpu *dst_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr); rc = kvm_s390_store_status_unloaded(dst_vcpu, KVM_S390_STORE_STATUS_NOADDR); } @@ -333,28 +317,26 @@ static int __sigp_store_status_at_addr(struct kvm_vcpu *vcpu, u16 cpu_id, static int __sigp_sense_running(struct kvm_vcpu *vcpu, u16 cpu_addr, u64 *reg) { + struct kvm_s390_local_interrupt *li; + struct kvm_vcpu *dst_vcpu = NULL; int rc; - struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; if (cpu_addr >= KVM_MAX_VCPUS) return SIGP_CC_NOT_OPERATIONAL; - spin_lock(&fi->lock); - if (fi->local_int[cpu_addr] == NULL) - rc = SIGP_CC_NOT_OPERATIONAL; - else { - if (atomic_read(fi->local_int[cpu_addr]->cpuflags) - & CPUSTAT_RUNNING) { - /* running */ - rc = SIGP_CC_ORDER_CODE_ACCEPTED; - } else { - /* not running */ - *reg &= 0xffffffff00000000UL; - *reg |= SIGP_STATUS_NOT_RUNNING; - rc = SIGP_CC_STATUS_STORED; - } + dst_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr); + if (!dst_vcpu) + return SIGP_CC_NOT_OPERATIONAL; + li = &dst_vcpu->arch.local_int; + if (atomic_read(li->cpuflags) & CPUSTAT_RUNNING) { + /* running */ + rc = SIGP_CC_ORDER_CODE_ACCEPTED; + } else { + /* not running */ + *reg &= 0xffffffff00000000UL; + *reg |= SIGP_STATUS_NOT_RUNNING; + rc = SIGP_CC_STATUS_STORED; } - spin_unlock(&fi->lock); VCPU_EVENT(vcpu, 4, "sensed running status of cpu %x rc %x", cpu_addr, rc); @@ -365,26 +347,22 @@ static int __sigp_sense_running(struct kvm_vcpu *vcpu, u16 cpu_addr, /* Test whether the destination CPU is available and not busy */ static int sigp_check_callable(struct kvm_vcpu *vcpu, u16 cpu_addr) { - struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; struct kvm_s390_local_interrupt *li; int rc = SIGP_CC_ORDER_CODE_ACCEPTED; + struct kvm_vcpu *dst_vcpu = NULL; if (cpu_addr >= KVM_MAX_VCPUS) return SIGP_CC_NOT_OPERATIONAL; - spin_lock(&fi->lock); - li = fi->local_int[cpu_addr]; - if (li == NULL) { - rc = SIGP_CC_NOT_OPERATIONAL; - goto out; - } - + dst_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr); + if (!dst_vcpu) + return SIGP_CC_NOT_OPERATIONAL; + li = &dst_vcpu->arch.local_int; spin_lock_bh(&li->lock); if (li->action_bits & ACTION_STOP_ON_STOP) rc = SIGP_CC_BUSY; spin_unlock_bh(&li->lock); -out: - spin_unlock(&fi->lock); + return rc; }

[PULL,5/8] KVM: s390: get rid of local_int array

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