[PATCH v10 21/26] KVM: s390: vsie: allow guest FORMAT-0 CRYCB on host FORMAT-1

Tony Krowiak
2018-09-12T19:43:11Z

From: Pierre Morel <pmorel@linux.ibm.com>

When the guest schedules a SIE with a FORMAT-0 CRYCB,
we are able to schedule it in the host with a FORMAT-1
CRYCB if the host uses FORMAT-1 or FORMAT-0.

Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
---
arch/s390/kvm/vsie.c | 14 ++++++++++----
1 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c
index 67a5536..90ae310 100644
--- a/arch/s390/kvm/vsie.c
+++ b/arch/s390/kvm/vsie.c
@@ -220,11 +220,17 @@ static int setup_apcb(struct kvm_vcpu *vcpu, struct kvm_s390_crypto_cb *crycb_s,
case CRYCB_FORMAT0:
if ((crycb_o & PAGE_MASK) != ((crycb_o + 32) & PAGE_MASK))
return -EACCES;
- if (fmt_h != CRYCB_FORMAT0)
+
+ switch (fmt_h) {
+ case CRYCB_FORMAT2:
return -EINVAL;
- return setup_apcb00(vcpu, (unsigned long *) &crycb_s->apcb0,
- (unsigned long) &crycb->apcb0,
- (unsigned long *) &crycb_h->apcb0);
+ case CRYCB_FORMAT1:
+ case CRYCB_FORMAT0:
+ return setup_apcb00(vcpu,
+ (unsigned long *) &crycb_s->apcb0,
+ (unsigned long) &crycb->apcb0,
+ (unsigned long *) &crycb_h->apcb0);
+ }
}
return -EINVAL;
}
--
1.7.1