[PATCH v3 09/22] KVM: Annotate -EFAULTs from kvm_vcpu_map()

[Anish Moorthy <amoorthy@xxxxxxxxxx>]

Implement KVM_CAP_MEMORY_FAULT_INFO for efaults generated by
kvm_vcpu_map().

Signed-off-by: Anish Moorthy <amoorthy@xxxxxxxxxx>
---
 virt/kvm/kvm_main.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 572adba9ad8ed..f3be5aa49829a 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2843,8 +2843,10 @@ int kvm_vcpu_map(struct kvm_vcpu *vcpu, gfn_t gfn, struct kvm_host_map *map)
 #endif
 	}
 
-	if (!hva)
+	if (!hva) {
+		kvm_populate_efault_info(vcpu, gfn * PAGE_SIZE, PAGE_SIZE);
 		return -EFAULT;
+	}
 
 	map->page = page;
 	map->hva = hva;
-- 
2.40.0.577.gac1e443424-goog