| Message ID | 20170509085618.28311-4-cdall@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Christoffer, On 09/05/2017 10:56, Christoffer Dall wrote: > 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> Thanks Eric > --- > include/linux/kvm_host.h | 11 +++++++++++ > 1 file changed, 11 insertions(+) > > diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h > index 2c14ad9..12eb26d 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;\ >
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 2c14ad9..12eb26d 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;\
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> --- include/linux/kvm_host.h | 11 +++++++++++ 1 file changed, 11 insertions(+)