linux-kernel - [PATCH v2 029/144] KVM: selftests: Add a VM backpointer to 'struct vcpu'

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Message-Id: <20220603004331.1523888-30-seanjc@google.com>
Date:   Fri,  3 Jun 2022 00:41:36 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     kvm@...r.kernel.org, Vitaly Kuznetsov <vkuznets@...hat.com>,
        Andrew Jones <drjones@...hat.com>,
        David Matlack <dmatlack@...gle.com>,
        Ben Gardon <bgardon@...gle.com>,
        Oliver Upton <oupton@...gle.com>, linux-kernel@...r.kernel.org
Subject: [PATCH v2 029/144] KVM: selftests: Add a VM backpointer to 'struct vcpu'

Add a backpointer to 'struct vcpu' so that tests can get at the owning
VM when passing around a vCPU object.  Long term, this will be little
more than a nice-to-have feature, but in the short term it is a critical
step toward purging the VM+vcpu_id ioctl mess without introducing even
more churn.

Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
 tools/testing/selftests/kvm/include/kvm_util_base.h | 1 +
 tools/testing/selftests/kvm/lib/kvm_util.c          | 1 +
 2 files changed, 2 insertions(+)

diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h
index 6e63e7e57752..2e1453cb0511 100644
--- a/tools/testing/selftests/kvm/include/kvm_util_base.h
+++ b/tools/testing/selftests/kvm/include/kvm_util_base.h
@@ -47,6 +47,7 @@ struct vcpu {
 	struct list_head list;
 	uint32_t id;
 	int fd;
+	struct kvm_vm *vm;
 	struct kvm_run *state;
 	struct kvm_dirty_gfn *dirty_gfns;
 	uint32_t fetch_index;
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 220e079dc749..2d82b5720737 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -1099,6 +1099,7 @@ void vm_vcpu_add(struct kvm_vm *vm, uint32_t vcpuid)
 	vcpu = calloc(1, sizeof(*vcpu));
 	TEST_ASSERT(vcpu != NULL, "Insufficient Memory");
 
+	vcpu->vm = vm;
 	vcpu->id = vcpuid;
 	vcpu->fd = __vm_ioctl(vm, KVM_CREATE_VCPU, (void *)(unsigned long)vcpuid);
 	TEST_ASSERT(vcpu->fd >= 0, KVM_IOCTL_ERROR(KVM_CREATE_VCPU, vcpu->fd));
-- 
2.36.1.255.ge46751e96f-goog