diff options
| author | Dominik Dingel <dingel@linux.vnet.ibm.com> | 2014-01-14 17:11:14 (GMT) |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2014-04-22 07:36:26 (GMT) |
| commit | 693ffc0802db41911ada95a3e77546f0ed1e7d00 (patch) | |
| tree | e9de97bef94041a578e84f30fbbfddfb355b3aea /arch/s390/kvm/priv.c | |
| parent | 934bc131efc3e4be6a52f7dd6c4dbf99635e381a (diff) | |
| download | linux-693ffc0802db41911ada95a3e77546f0ed1e7d00.tar.xz | |
KVM: s390: Don't enable skeys by default
The first invocation of storage key operations on a given cpu will be intercepted.
On these intercepts we will enable storage keys for the guest and remove the
previously added intercepts.
Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390/kvm/priv.c')
| -rw-r--r-- | arch/s390/kvm/priv.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c index 476e9e2..8a63e99 100644 --- a/arch/s390/kvm/priv.c +++ b/arch/s390/kvm/priv.c @@ -147,8 +147,21 @@ static int handle_store_cpu_address(struct kvm_vcpu *vcpu) return 0; } +static void __skey_check_enable(struct kvm_vcpu *vcpu) +{ + if (!(vcpu->arch.sie_block->ictl & (ICTL_ISKE | ICTL_SSKE | ICTL_RRBE))) + return; + + s390_enable_skey(); + trace_kvm_s390_skey_related_inst(vcpu); + vcpu->arch.sie_block->ictl &= ~(ICTL_ISKE | ICTL_SSKE | ICTL_RRBE); +} + + static int handle_skey(struct kvm_vcpu *vcpu) { + __skey_check_enable(vcpu); + vcpu->stat.instruction_storage_key++; if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) @@ -618,6 +631,7 @@ static int handle_pfmf(struct kvm_vcpu *vcpu) } if (vcpu->run->s.regs.gprs[reg1] & PFMF_SK) { + __skey_check_enable(vcpu); if (set_guest_storage_key(current->mm, useraddr, vcpu->run->s.regs.gprs[reg1] & PFMF_KEY, vcpu->run->s.regs.gprs[reg1] & PFMF_NQ)) |