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

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Message-Id: <1536781396-13601-22-git-send-email-akrowiak@linux.vnet.ibm.com>
Date:   Wed, 12 Sep 2018 15:43:11 -0400
From:   Tony Krowiak <akrowiak@...ux.vnet.ibm.com>
To:     linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org
Cc:     freude@...ibm.com, schwidefsky@...ibm.com,
        heiko.carstens@...ibm.com, borntraeger@...ibm.com,
        cohuck@...hat.com, kwankhede@...dia.com,
        bjsdjshi@...ux.vnet.ibm.com, pbonzini@...hat.com,
        alex.williamson@...hat.com, pmorel@...ux.vnet.ibm.com,
        alifm@...ux.vnet.ibm.com, mjrosato@...ux.vnet.ibm.com,
        jjherne@...ux.vnet.ibm.com, thuth@...hat.com,
        pasic@...ux.vnet.ibm.com, berrange@...hat.com,
        fiuczy@...ux.vnet.ibm.com, buendgen@...ibm.com,
        akrowiak@...ux.vnet.ibm.com, frankja@...ux.ibm.com,
        Pierre Morel <pmorel@...ux.ibm.com>,
        Tony Krowiak <akrowiak@...ux.ibm.com>
Subject: [PATCH v10 21/26] KVM: s390: vsie: allow guest FORMAT-0 CRYCB on host FORMAT-1

From: Pierre Morel <pmorel@...ux.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@...ux.ibm.com>
Signed-off-by: Tony Krowiak <akrowiak@...ux.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