KVM: s390: Beautify skey enable check
Let's introduce an explicit check if skeys have already been enabled
for the vcpu, so we don't have to check the mm context if we don't have
the storage key facility.
This lets us check for enablement without having to take the mm
semaphore and thus speedup skey emulation.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: Farhan Ali <alifm@linux.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h
index 1a7b683..29c940b 100644
--- a/arch/s390/include/asm/kvm_host.h
+++ b/arch/s390/include/asm/kvm_host.h
@@ -656,6 +656,7 @@ struct kvm_vcpu_arch {
seqcount_t cputm_seqcount;
__u64 cputm_start;
bool gs_enabled;
+ bool skey_enabled;
};
struct kvm_vm_stat {