From 68ae7c7bc56a4504ed5efde7c2f8d6024148a35e Mon Sep 17 00:00:00 2001 From: Sean Christopherson Date: Tue, 1 Nov 2022 15:53:41 +0100 Subject: KVM: SVM: Add a proper field for Hyper-V VMCB enlightenments Add a union to provide hv_enlightenments side-by-side with the sw_reserved bytes that Hyper-V's enlightenments overlay. Casting sw_reserved everywhere is messy, confusing, and unnecessarily unsafe. No functional change intended. Signed-off-by: Sean Christopherson Signed-off-by: Vitaly Kuznetsov Signed-off-by: Paolo Bonzini Message-Id: <20221101145426.251680-4-vkuznets@redhat.com> Signed-off-by: Paolo Bonzini --- tools/testing/selftests/kvm/include/x86_64/svm.h | 5 ++++- tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c | 3 +-- 2 files changed, 5 insertions(+), 3 deletions(-) (limited to 'tools') diff --git a/tools/testing/selftests/kvm/include/x86_64/svm.h b/tools/testing/selftests/kvm/include/x86_64/svm.h index 89ce2c6b57fe..6e1527aa3419 100644 --- a/tools/testing/selftests/kvm/include/x86_64/svm.h +++ b/tools/testing/selftests/kvm/include/x86_64/svm.h @@ -123,7 +123,10 @@ struct __attribute__ ((__packed__)) vmcb_control_area { * Offset 0x3e0, 32 bytes reserved * for use by hypervisor/software. */ - u8 reserved_sw[32]; + union { + struct hv_enlightenments hv_enlightenments; + u8 reserved_sw[32]; + }; }; diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c b/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c index 2fd64b419928..8ef6a4c83cb1 100644 --- a/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c +++ b/tools/testing/selftests/kvm/x86_64/hyperv_svm_test.c @@ -46,8 +46,7 @@ static void __attribute__((__flatten__)) guest_code(struct svm_test_data *svm) { unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE]; struct vmcb *vmcb = svm->vmcb; - struct hv_enlightenments *hve = - (struct hv_enlightenments *)vmcb->control.reserved_sw; + struct hv_enlightenments *hve = &vmcb->control.hv_enlightenments; GUEST_SYNC(1); -- cgit v1.2.3