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KVM: s390: Enable DAT support for TPROT handler

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The TPROT instruction can be used to check the accessability of storage
for any kind of logical addresses. So far, our handler only supported
real addresses. This patch now also enables support for addresses that
have to be translated via DAT first. And while we're at it, change the
code to use the common KVM function gfn_to_hva_prot() to check for the
validity and writability of the memory page.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Thomas Huth
2014-02-04 14:48:07 +01:00
committed by Christian Borntraeger
parent 9fbc02760d
commit a0465f9ae4
3 changed files with 37 additions and 25 deletions
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arch/s390/kvm/gaccess.h
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@@ -327,6 +327,8 @@ int read_guest_real(struct kvm_vcpu *vcpu, unsigned long gra, void *data,
return access_guest_real(vcpu, gra, data, len, 0);
}
void ipte_lock(struct kvm_vcpu *vcpu);
void ipte_unlock(struct kvm_vcpu *vcpu);
int ipte_lock_held(struct kvm_vcpu *vcpu);
int kvm_s390_check_low_addr_protection(struct kvm_vcpu *vcpu, unsigned long ga);