diff options
-rw-r--r-- | arch/s390/kvm/kvm-s390.c | 25 | ||||
-rw-r--r-- | arch/s390/kvm/kvm-s390.h | 4 | ||||
-rw-r--r-- | arch/s390/kvm/sigp.c | 15 |
3 files changed, 31 insertions, 13 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 7f47835..55eb8de 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -873,7 +873,7 @@ static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, void *from, * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit * KVM_S390_STORE_STATUS_PREFIXED: -> prefix */ -int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) +int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr) { unsigned char archmode = 1; int prefix; @@ -891,15 +891,6 @@ int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) } else prefix = 0; - /* - * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy - * copying in vcpu load/put. Lets update our copies before we save - * it into the save area - */ - save_fp_ctl(&vcpu->arch.guest_fpregs.fpc); - save_fp_regs(vcpu->arch.guest_fpregs.fprs); - save_access_regs(vcpu->run->s.regs.acrs); - if (__guestcopy(vcpu, addr + offsetof(struct save_area, fp_regs), vcpu->arch.guest_fpregs.fprs, 128, prefix)) return -EFAULT; @@ -944,6 +935,20 @@ int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) return 0; } +int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) +{ + /* + * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy + * copying in vcpu load/put. Lets update our copies before we save + * it into the save area + */ + save_fp_ctl(&vcpu->arch.guest_fpregs.fpc); + save_fp_regs(vcpu->arch.guest_fpregs.fprs); + save_access_regs(vcpu->run->s.regs.acrs); + + return kvm_s390_store_status_unloaded(vcpu, addr); +} + static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, struct kvm_enable_cap *cap) { diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h index fcd25b4..36f6b18 100644 --- a/arch/s390/kvm/kvm-s390.h +++ b/arch/s390/kvm/kvm-s390.h @@ -145,8 +145,8 @@ int kvm_s390_handle_eb(struct kvm_vcpu *vcpu); int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu); /* implemented in kvm-s390.c */ -int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, - unsigned long addr); +int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr); +int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr); void s390_vcpu_block(struct kvm_vcpu *vcpu); void s390_vcpu_unblock(struct kvm_vcpu *vcpu); void exit_sie(struct kvm_vcpu *vcpu); diff --git a/arch/s390/kvm/sigp.c b/arch/s390/kvm/sigp.c index bec398c..6805601 100644 --- a/arch/s390/kvm/sigp.c +++ b/arch/s390/kvm/sigp.c @@ -130,6 +130,7 @@ unlock: static int __inject_sigp_stop(struct kvm_s390_local_interrupt *li, int action) { struct kvm_s390_interrupt_info *inti; + int rc = SIGP_CC_ORDER_CODE_ACCEPTED; inti = kzalloc(sizeof(*inti), GFP_ATOMIC); if (!inti) @@ -139,6 +140,8 @@ static int __inject_sigp_stop(struct kvm_s390_local_interrupt *li, int action) spin_lock_bh(&li->lock); if ((atomic_read(li->cpuflags) & CPUSTAT_STOPPED)) { kfree(inti); + if ((action & ACTION_STORE_ON_STOP) != 0) + rc = -ESHUTDOWN; goto out; } list_add_tail(&inti->list, &li->list); @@ -150,7 +153,7 @@ static int __inject_sigp_stop(struct kvm_s390_local_interrupt *li, int action) out: spin_unlock_bh(&li->lock); - return SIGP_CC_ORDER_CODE_ACCEPTED; + return rc; } static int __sigp_stop(struct kvm_vcpu *vcpu, u16 cpu_addr, int action) @@ -174,6 +177,16 @@ static int __sigp_stop(struct kvm_vcpu *vcpu, u16 cpu_addr, int 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); + } + return rc; } |