linux-kernel - Re: [PATCH v2 038/144] KVM: selftests: Push vm_adjust_num_guest

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Date:   Wed, 8 Jun 2022 16:38:28 +0200
From:   Andrew Jones <drjones@...hat.com>
To:     Sean Christopherson <seanjc@...gle.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>, kvm@...r.kernel.org,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        David Matlack <dmatlack@...gle.com>,
        Ben Gardon <bgardon@...gle.com>,
        Oliver Upton <oupton@...gle.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 038/144] KVM: selftests: Push
 vm_adjust_num_guest_pages() into "w/o vCPUs" helper

On Fri, Jun 03, 2022 at 12:41:45AM +0000, Sean Christopherson wrote:
> Move the call to vm_adjust_num_guest_pages() from vm_create_with_vcpus()
> down into vm_create_without_vcpus().  This will allow a future patch to
> make the "w/o vCPUs" variant the common inner helper, e.g. so that the
> "with_vcpus" helper calls the "without_vcpus" helper, instead of having
> them be separate paths.
> 
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>
> ---
>  tools/testing/selftests/kvm/lib/kvm_util.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
> index 1c5caf2ddca4..6b0b65c26d4d 100644
> --- a/tools/testing/selftests/kvm/lib/kvm_util.c
> +++ b/tools/testing/selftests/kvm/lib/kvm_util.c
> @@ -282,6 +282,8 @@ struct kvm_vm *vm_create_without_vcpus(enum vm_guest_mode mode, uint64_t pages)
>  {
>  	struct kvm_vm *vm;
>  
> +	pages = vm_adjust_num_guest_pages(VM_MODE_DEFAULT, pages);

Hi Sean,

We should pass 'mode' here.

Thanks,
drew

> +
>  	vm = __vm_create(mode, pages);
>  
>  	kvm_vm_elf_load(vm, program_invocation_name);
> @@ -341,8 +343,6 @@ struct kvm_vm *vm_create_with_vcpus(enum vm_guest_mode mode, uint32_t nr_vcpus,
>  		    "nr_vcpus = %d too large for host, max-vcpus = %d",
>  		    nr_vcpus, kvm_check_cap(KVM_CAP_MAX_VCPUS));
>  
> -	pages = vm_adjust_num_guest_pages(mode, pages);
> -
>  	vm = vm_create_without_vcpus(mode, pages);
>  
>  	for (i = 0; i < nr_vcpus; ++i) {
> -- 
> 2.36.1.255.ge46751e96f-goog
>