Commit 497d72d8 authored May 08, 2017 by Christoffer Dall

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>

parent 443c3a9e

include/linux/kvm_host.h

+11 −0

Original line number	Diff line number	Diff line
		@@ -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;\

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