From 2c26d1d23abd9a67d056c95a0823132a71edc477 Mon Sep 17 00:00:00 2001 From: David Hildenbrand Date: Wed, 13 Apr 2016 15:47:21 +0200 Subject: [PATCH] KVM: s390: pfmf: take care of amode when setting reg2 Depending on the addressing mode, we must not overwrite bit 0-31 of the register. In addition, 24 bit and 31 bit have to set certain bits to 0, which is guaranteed by converting the end address to an effective address. Reviewed-by: Christian Borntraeger Signed-off-by: David Hildenbrand Signed-off-by: Christian Borntraeger --- arch/s390/kvm/priv.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c index 5c926b74d7ca..71fa603034d0 100644 --- a/arch/s390/kvm/priv.c +++ b/arch/s390/kvm/priv.c @@ -733,8 +733,15 @@ static int handle_pfmf(struct kvm_vcpu *vcpu) start += PAGE_SIZE; } - if (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) - vcpu->run->s.regs.gprs[reg2] = end; + if (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) { + if (psw_bits(vcpu->arch.sie_block->gpsw).eaba == PSW_AMODE_64BIT) { + vcpu->run->s.regs.gprs[reg2] = end; + } else { + vcpu->run->s.regs.gprs[reg2] &= ~0xffffffffUL; + end = kvm_s390_logical_to_effective(vcpu, end); + vcpu->run->s.regs.gprs[reg2] |= end; + } + } return 0; }