diff options
| -rw-r--r-- | arch/s390/include/asm/kvm.h | 2 | ||||
| -rw-r--r-- | arch/s390/kvm/kvm-s390.c | 7 |
2 files changed, 9 insertions, 0 deletions
diff --git a/arch/s390/include/asm/kvm.h b/arch/s390/include/asm/kvm.h index 325560afb77e..9fc328c26159 100644 --- a/arch/s390/include/asm/kvm.h +++ b/arch/s390/include/asm/kvm.h @@ -41,7 +41,9 @@ struct kvm_debug_exit_arch { struct kvm_guest_debug_arch { }; +#define KVM_SYNC_PREFIX (1UL << 0) /* definition of registers in kvm_run */ struct kvm_sync_regs { + __u64 prefix; /* prefix register */ }; #endif diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 1868b89a840f..6962c1b9eec6 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -132,6 +132,7 @@ int kvm_dev_ioctl_check_extension(long ext) #ifdef CONFIG_KVM_S390_UCONTROL case KVM_CAP_S390_UCONTROL: #endif + case KVM_CAP_SYNC_REGS: r = 1; break; default: @@ -288,6 +289,7 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) } vcpu->arch.gmap = vcpu->kvm->arch.gmap; + vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX; return 0; } @@ -572,6 +574,10 @@ rerun_vcpu: vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; + if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) { + kvm_run->kvm_dirty_regs &= ~KVM_SYNC_PREFIX; + kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); + } might_fault(); @@ -620,6 +626,7 @@ rerun_vcpu: kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; + kvm_run->s.regs.prefix = vcpu->arch.sie_block->prefix; if (vcpu->sigset_active) sigprocmask(SIG_SETMASK, &sigsaved, NULL); |