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authorHeiko Carstens <heiko.carstens@de.ibm.com>2014-01-01 16:09:21 +0100
committerChristian Borntraeger <borntraeger@de.ibm.com>2014-04-22 13:24:35 +0200
commitdfeec843fb237d73947e818f961e8d6f0df22b01 (patch)
treea5e854b8a77d0fd241f1d2d2dfc8bdf019b95d04 /include
parentbcd846837c43ccccc932036d5a634bee48f1ff4f (diff)
downloadlinux-dfeec843fb237d73947e818f961e8d6f0df22b01.tar.bz2
KVM: add kvm_is_error_gpa() helper
It's quite common (in the s390 guest access code) to test if a guest physical address points to a valid guest memory area or not. So add a simple helper function in common code, since this might be of interest for other architectures as well. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/kvm_host.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 7d21cf9f4380..471d1400c4ac 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -879,6 +879,13 @@ static inline hpa_t pfn_to_hpa(pfn_t pfn)
return (hpa_t)pfn << PAGE_SHIFT;
}
+static inline bool kvm_is_error_gpa(struct kvm *kvm, gpa_t gpa)
+{
+ unsigned long hva = gfn_to_hva(kvm, gpa_to_gfn(gpa));
+
+ return kvm_is_error_hva(hva);
+}
+
static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
{
set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);