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authorDavid Hildenbrand <dahi@linux.vnet.ibm.com>2015-03-25 13:12:32 +0100
committerChristian Borntraeger <borntraeger@de.ibm.com>2015-03-31 13:49:08 +0200
commit2ba459685204af53b034d269d5cdb3059d4b471e (patch)
tree2f4394b1dc5bef10a406c556429fe52a9114ed55 /arch/s390
parent18280d8b4bcd4a2b174ee3cd748166c6190acacb (diff)
downloadlinux-2ba459685204af53b034d269d5cdb3059d4b471e.tar.bz2
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 <jfrei@linux.vnet.ibm.com> Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/kvm/interrupt.c2
1 files changed, 2 insertions, 0 deletions
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,