From 2ba459685204af53b034d269d5cdb3059d4b471e Mon Sep 17 00:00:00 2001 From: David Hildenbrand Date: Wed, 25 Mar 2015 13:12:32 +0100 Subject: [PATCH] KVM: s390: store the breaking-event address on pgm interrupts If the PER-3 facility is installed, the breaking-event address is to be stored in the low core. There is no facility bit for PER-3 in stfl(e) and Linux always uses the value at address 272 no matter if PER-3 is available or not. We can't hide its existence from the guest. All program interrupts injected via the SIE automatically store this information if the PER-3 facility is available in the hypervisor. Also the itdb contains the address automatically. As there is no switch to turn this mechanism off, let's simply make it consistent and also store the breaking event address in case of manual program interrupt injection. Reviewed-by: Jens Freimann Signed-off-by: David Hildenbrand Reviewed-by: Christian Borntraeger Signed-off-by: Christian Borntraeger Acked-by: Cornelia Huck --- arch/s390/kvm/interrupt.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c index 2afec6006def..2361b8ed0a50 100644 --- a/arch/s390/kvm/interrupt.c +++ b/arch/s390/kvm/interrupt.c @@ -585,6 +585,8 @@ static int __must_check __deliver_prog(struct kvm_vcpu *vcpu) kvm_s390_rewind_psw(vcpu, ilc); rc |= put_guest_lc(vcpu, ilc, (u16 *) __LC_PGM_ILC); + rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->gbea, + (u64 *) __LC_LAST_BREAK); rc |= put_guest_lc(vcpu, pgm_info.code, (u16 *)__LC_PGM_INT_CODE); rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW, -- 2.34.1