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KVM: s390: vsie: allow guest FORMAT-1 CRYCB on host FORMAT-2

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When the guest schedules a SIE with a CRYCB FORMAT-1 CRYCB,
we are able to schedule it in the host with a FORMAT-2 CRYCB
if the host uses FORMAT-2.

Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
Message-Id: <20180925231641.4954-23-akrowiak@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Pierre Morel 2018-09-25 19:16:37 -04:00 committed by Christian Borntraeger
parent c9ba8c2cd2
commit 6b79de4b05
1 changed files with 28 additions and 5 deletions
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29
arch/s390/kvm/vsie.c
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@ -135,6 +135,22 @@ static int prepare_cpuflags(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
atomic_set(&scb_s->cpuflags, newflags); atomic_set(&scb_s->cpuflags, newflags);
return 0; return 0;
} }
/* Copy to APCB FORMAT1 from APCB FORMAT0 */
static int setup_apcb10(struct kvm_vcpu *vcpu, struct kvm_s390_apcb1 *apcb_s,
unsigned long apcb_o, struct kvm_s390_apcb1 *apcb_h)
{
struct kvm_s390_apcb0 tmp;
if (read_guest_real(vcpu, apcb_o, &tmp, sizeof(struct kvm_s390_apcb0)))
return -EFAULT;
apcb_s->apm[0] = apcb_h->apm[0] & tmp.apm[0];
apcb_s->aqm[0] = apcb_h->aqm[0] & tmp.aqm[0] & 0xffff000000000000UL;
apcb_s->adm[0] = apcb_h->adm[0] & tmp.adm[0] & 0xffff000000000000UL;
return 0;
}
/** /**
* setup_apcb00 - Copy to APCB FORMAT0 from APCB FORMAT0 * setup_apcb00 - Copy to APCB FORMAT0 from APCB FORMAT0
@ -212,11 +228,18 @@ static int setup_apcb(struct kvm_vcpu *vcpu, struct kvm_s390_crypto_cb *crycb_s,
(unsigned long) &crycb->apcb1, (unsigned long) &crycb->apcb1,
(unsigned long *)&crycb_h->apcb1); (unsigned long *)&crycb_h->apcb1);
case CRYCB_FORMAT1: case CRYCB_FORMAT1:
if (fmt_h != CRYCB_FORMAT1) switch (fmt_h) {
return -EINVAL; case CRYCB_FORMAT2:
return setup_apcb00(vcpu, (unsigned long *) &crycb_s->apcb0, return setup_apcb10(vcpu, &crycb_s->apcb1,
(unsigned long) &crycb->apcb0,
&crycb_h->apcb1);
case CRYCB_FORMAT1:
return setup_apcb00(vcpu,
(unsigned long *) &crycb_s->apcb0,
(unsigned long) &crycb->apcb0, (unsigned long) &crycb->apcb0,
(unsigned long *) &crycb_h->apcb0); (unsigned long *) &crycb_h->apcb0);
}
break;
case CRYCB_FORMAT0: case CRYCB_FORMAT0:
if ((crycb_o & PAGE_MASK) != ((crycb_o + 32) & PAGE_MASK)) if ((crycb_o & PAGE_MASK) != ((crycb_o + 32) & PAGE_MASK))
return -EACCES; return -EACCES;