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authorChristoffer Dall <cdall@linaro.org>2017-05-08 21:38:40 +0300
committerChristoffer Dall <cdall@linaro.org>2017-05-09 13:19:14 +0300
commit497d72d80a789501501cccabdad6b145f9e31371 (patch)
tree278c4ca307da2925f7f89078a38aad03bd3d213f /include/linux/kvm_host.h
parent443c3a9e686aa44cf00c677498a6b715f9a43a45 (diff)
downloadlinux-497d72d80a789501501cccabdad6b145f9e31371.tar.xz
KVM: Add kvm_vcpu_get_idx to get vcpu index in kvm->vcpus
There are occasional needs to use the index of vcpu in the kvm->vcpus array to map something related to a VCPU. For example, unlike the vcpu->vcpu_id, the vcpu index is guaranteed to not be sparse across all vcpus which is useful when allocating a memory area for each vcpu. Signed-off-by: Christoffer Dall <cdall@linaro.org> Reviewed-by: Eric Auger <eric.auger@redhat.com>
Diffstat (limited to 'include/linux/kvm_host.h')
-rw-r--r--include/linux/kvm_host.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 2c14ad9809da..12eb26d665e8 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -490,6 +490,17 @@ static inline struct kvm_vcpu *kvm_get_vcpu_by_id(struct kvm *kvm, int id)
return NULL;
}
+static inline int kvm_vcpu_get_idx(struct kvm_vcpu *vcpu)
+{
+ struct kvm_vcpu *tmp;
+ int idx;
+
+ kvm_for_each_vcpu(idx, tmp, vcpu->kvm)
+ if (tmp == vcpu)
+ return idx;
+ BUG();
+}
+
#define kvm_for_each_memslot(memslot, slots) \
for (memslot = &slots->memslots[0]; \
memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\