linux-kernel - Re: [PATCH v3 29/34] KVM: selftests: nSVM: Allocate Hyper-V partition assist and VP assist pages

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Date:   Wed, 11 May 2022 15:17:47 +0300
From:   Maxim Levitsky <mlevitsk@...hat.com>
To:     Vitaly Kuznetsov <vkuznets@...hat.com>, kvm@...r.kernel.org,
        Paolo Bonzini <pbonzini@...hat.com>
Cc:     Sean Christopherson <seanjc@...gle.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Michael Kelley <mikelley@...rosoft.com>,
        Siddharth Chandrasekaran <sidcha@...zon.de>,
        linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 29/34] KVM: selftests: nSVM: Allocate Hyper-V
 partition assist and VP assist pages

On Thu, 2022-04-14 at 15:20 +0200, Vitaly Kuznetsov wrote:
> In preparation to testing Hyper-V L2 TLB flush hypercalls, allocate VP
> assist and Partition assist pages and link them to 'struct svm_test_data'.
> 
> Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.com>
> ---
>  tools/testing/selftests/kvm/include/x86_64/svm_util.h | 10 ++++++++++
>  tools/testing/selftests/kvm/lib/x86_64/svm.c          | 10 ++++++++++
>  2 files changed, 20 insertions(+)
> 
> diff --git a/tools/testing/selftests/kvm/include/x86_64/svm_util.h b/tools/testing/selftests/kvm/include/x86_64/svm_util.h
> index a25aabd8f5e7..640859b58fd6 100644
> --- a/tools/testing/selftests/kvm/include/x86_64/svm_util.h
> +++ b/tools/testing/selftests/kvm/include/x86_64/svm_util.h
> @@ -34,6 +34,16 @@ struct svm_test_data {
>  	void *msr; /* gva */
>  	void *msr_hva;
>  	uint64_t msr_gpa;
> +
> +	/* Hyper-V VP assist page */
> +	void *vp_assist; /* gva */
> +	void *vp_assist_hva;
> +	uint64_t vp_assist_gpa;
> +
> +	/* Hyper-V Partition assist page */
> +	void *partition_assist; /* gva */
> +	void *partition_assist_hva;
> +	uint64_t partition_assist_gpa;
>  };
>  
>  struct svm_test_data *vcpu_alloc_svm(struct kvm_vm *vm, vm_vaddr_t *p_svm_gva);
> diff --git a/tools/testing/selftests/kvm/lib/x86_64/svm.c b/tools/testing/selftests/kvm/lib/x86_64/svm.c
> index 736ee4a23df6..c284e8f87f5c 100644
> --- a/tools/testing/selftests/kvm/lib/x86_64/svm.c
> +++ b/tools/testing/selftests/kvm/lib/x86_64/svm.c
> @@ -48,6 +48,16 @@ vcpu_alloc_svm(struct kvm_vm *vm, vm_vaddr_t *p_svm_gva)
>  	svm->msr_gpa = addr_gva2gpa(vm, (uintptr_t)svm->msr);
>  	memset(svm->msr_hva, 0, getpagesize());
>  
> +	svm->vp_assist = (void *)vm_vaddr_alloc_page(vm);
> +	svm->vp_assist_hva = addr_gva2hva(vm, (uintptr_t)svm->vp_assist);
> +	svm->vp_assist_gpa = addr_gva2gpa(vm, (uintptr_t)svm->vp_assist);
> +	memset(svm->vp_assist_hva, 0, getpagesize());
> +
> +	svm->partition_assist = (void *)vm_vaddr_alloc_page(vm);
> +	svm->partition_assist_hva = addr_gva2hva(vm, (uintptr_t)svm->partition_assist);
> +	svm->partition_assist_gpa = addr_gva2gpa(vm, (uintptr_t)svm->partition_assist);
> +	memset(svm->partition_assist_hva, 0, getpagesize());
> +
>  	*p_svm_gva = svm_gva;
>  	return svm;
>  }

Reviewed-by: Maxim Levitsky <mlevitsk@...hat.com>

Best regards,
	Maxim Levitsky