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Commit 497d72d8 authored by Christoffer Dall's avatar Christoffer Dall
Browse files

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: default avatarChristoffer Dall <cdall@linaro.org>
Reviewed-by: default avatarEric 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;\