From dfeec843fb237d73947e818f961e8d6f0df22b01 Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Wed, 1 Jan 2014 16:09:21 +0100 Subject: [PATCH] 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 Reviewed-by: Thomas Huth Reviewed-by: Cornelia Huck Signed-off-by: Christian Borntraeger --- include/linux/kvm_host.h | 7 +++++++ 1 file changed, 7 insertions(+) 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); -- 2.20.1