From mboxrd@z Thu Jan 1 00:00:00 1970 From: cdall@linaro.org (Christoffer Dall) Date: Tue, 9 May 2017 10:56:10 +0200 Subject: [PATCH v2 03/11] KVM: Add kvm_vcpu_get_idx to get vcpu index in kvm->vcpus In-Reply-To: <20170509085618.28311-1-cdall@linaro.org> References: <20170509085618.28311-1-cdall@linaro.org> Message-ID: <20170509085618.28311-4-cdall@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 --- 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;\ -- 2.9.0