diff options
Diffstat (limited to 'arch/s390/kvm/intercept.c')
| -rw-r--r-- | arch/s390/kvm/intercept.c | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/arch/s390/kvm/intercept.c b/arch/s390/kvm/intercept.c index 654fc1f..c7c5189 100644 --- a/arch/s390/kvm/intercept.c +++ b/arch/s390/kvm/intercept.c @@ -165,26 +165,30 @@ static int handle_validity(struct kvm_vcpu *vcpu) int rc; vcpu->stat.exit_validity++; - if ((viwhy == 0x37) && (vcpu->arch.sie_block->prefix - <= kvm_s390_vcpu_get_memsize(vcpu) - 2*PAGE_SIZE)) { - rc = fault_in_pages_writeable((char __user *) - vcpu->arch.sie_block->gmsor + - vcpu->arch.sie_block->prefix, - 2*PAGE_SIZE); + if (viwhy == 0x37) { + vmaddr = gmap_fault(vcpu->arch.sie_block->prefix, + vcpu->arch.gmap); + if (IS_ERR_VALUE(vmaddr)) { + rc = -EOPNOTSUPP; + goto out; + } + rc = fault_in_pages_writeable((char __user *) vmaddr, + PAGE_SIZE); if (rc) { /* user will receive sigsegv, exit to user */ rc = -EOPNOTSUPP; goto out; } - vmaddr = gmap_fault(vcpu->arch.sie_block->prefix, + vmaddr = gmap_fault(vcpu->arch.sie_block->prefix + PAGE_SIZE, vcpu->arch.gmap); if (IS_ERR_VALUE(vmaddr)) { rc = -EOPNOTSUPP; goto out; } - vmaddr = gmap_fault(vcpu->arch.sie_block->prefix + PAGE_SIZE, - vcpu->arch.gmap); - if (IS_ERR_VALUE(vmaddr)) { + rc = fault_in_pages_writeable((char __user *) vmaddr, + PAGE_SIZE); + if (rc) { + /* user will receive sigsegv, exit to user */ rc = -EOPNOTSUPP; goto out; } |