linux-kernel - Re: [PATCH v3 28/34] KVM: selftests: nVMX: Allocate Hyper-V partition assist page

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Message-ID: <e2558fe11676ee6954a19ffea66ac08f503e6da1.camel@redhat.com>
Date:   Wed, 11 May 2022 15:17:35 +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 28/34] KVM: selftests: nVMX: Allocate Hyper-V
 partition assist page

On Thu, 2022-04-14 at 15:20 +0200, Vitaly Kuznetsov wrote:
> In preparation to testing Hyper-V L2 TLB flush hypercalls, allocate
> so-called Partition assist page and link it to 'struct vmx_pages'.
> 
> Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.com>
> ---
>  tools/testing/selftests/kvm/include/x86_64/vmx.h | 4 ++++
>  tools/testing/selftests/kvm/lib/x86_64/vmx.c     | 7 +++++++
>  2 files changed, 11 insertions(+)
> 
> diff --git a/tools/testing/selftests/kvm/include/x86_64/vmx.h b/tools/testing/selftests/kvm/include/x86_64/vmx.h
> index 583ceb0d1457..f99922ca8259 100644
> --- a/tools/testing/selftests/kvm/include/x86_64/vmx.h
> +++ b/tools/testing/selftests/kvm/include/x86_64/vmx.h
> @@ -567,6 +567,10 @@ struct vmx_pages {
>  	uint64_t enlightened_vmcs_gpa;
>  	void *enlightened_vmcs;
>  
> +	void *partition_assist_hva;
> +	uint64_t partition_assist_gpa;
> +	void *partition_assist;
> +
>  	void *eptp_hva;
>  	uint64_t eptp_gpa;
>  	void *eptp;
> diff --git a/tools/testing/selftests/kvm/lib/x86_64/vmx.c b/tools/testing/selftests/kvm/lib/x86_64/vmx.c
> index d089d8b850b5..3db21e0e1a8f 100644
> --- a/tools/testing/selftests/kvm/lib/x86_64/vmx.c
> +++ b/tools/testing/selftests/kvm/lib/x86_64/vmx.c
> @@ -124,6 +124,13 @@ vcpu_alloc_vmx(struct kvm_vm *vm, vm_vaddr_t *p_vmx_gva)
>  	vmx->enlightened_vmcs_gpa =
>  		addr_gva2gpa(vm, (uintptr_t)vmx->enlightened_vmcs);
>  
> +	/* Setup of a region of guest memory for the partition assist page. */
> +	vmx->partition_assist = (void *)vm_vaddr_alloc_page(vm);
> +	vmx->partition_assist_hva =
> +		addr_gva2hva(vm, (uintptr_t)vmx->partition_assist);
> +	vmx->partition_assist_gpa =
> +		addr_gva2gpa(vm, (uintptr_t)vmx->partition_assist);
> +
>  	*p_vmx_gva = vmx_gva;
>  	return vmx;
>  }


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

Best regards,
	Maxim Levitsky