linux-kernel - Re: [PATCH 07/15] KVM: selftests: Capture per-vCPU GPA in perf_test_vcpu

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Date:   Wed, 10 Feb 2021 17:24:08 -0800
From:   Ben Gardon <bgardon@...gle.com>
To:     Sean Christopherson <seanjc@...gle.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>, kvm <kvm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Yanan Wang <wangyanan55@...wei.com>,
        Andrew Jones <drjones@...hat.com>,
        Peter Xu <peterx@...hat.com>,
        Aaron Lewis <aaronlewis@...gle.com>
Subject: Re: [PATCH 07/15] KVM: selftests: Capture per-vCPU GPA in perf_test_vcpu_args

On Wed, Feb 10, 2021 at 3:06 PM Sean Christopherson <seanjc@...gle.com> wrote:
>
> Capture the per-vCPU GPA in perf_test_vcpu_args so that tests can get
> the GPA without having to calculate the GPA on their own.
>
> No functional change intended.
>
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>

Reviewed-by: Ben Gardon <bgardon@...gle.com>

> ---
>  tools/testing/selftests/kvm/include/perf_test_util.h | 1 +
>  tools/testing/selftests/kvm/lib/perf_test_util.c     | 9 ++++-----
>  2 files changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/tools/testing/selftests/kvm/include/perf_test_util.h b/tools/testing/selftests/kvm/include/perf_test_util.h
> index 005f2143adeb..4d53238b139f 100644
> --- a/tools/testing/selftests/kvm/include/perf_test_util.h
> +++ b/tools/testing/selftests/kvm/include/perf_test_util.h
> @@ -18,6 +18,7 @@
>  #define PERF_TEST_MEM_SLOT_INDEX       1
>
>  struct perf_test_vcpu_args {
> +       uint64_t gpa;
>         uint64_t gva;
>         uint64_t pages;
>
> diff --git a/tools/testing/selftests/kvm/lib/perf_test_util.c b/tools/testing/selftests/kvm/lib/perf_test_util.c
> index 73b0fccc28b9..f22ce1836547 100644
> --- a/tools/testing/selftests/kvm/lib/perf_test_util.c
> +++ b/tools/testing/selftests/kvm/lib/perf_test_util.c
> @@ -127,7 +127,6 @@ void perf_test_setup_vcpus(struct kvm_vm *vm, int vcpus,
>                            bool partition_vcpu_memory_access)
>  {
>         struct perf_test_args *pta = &perf_test_args;
> -       vm_paddr_t vcpu_gpa;
>         struct perf_test_vcpu_args *vcpu_args;
>         int vcpu_id;
>
> @@ -140,17 +139,17 @@ void perf_test_setup_vcpus(struct kvm_vm *vm, int vcpus,
>                                          (vcpu_id * vcpu_memory_bytes);
>                         vcpu_args->pages = vcpu_memory_bytes /
>                                            pta->guest_page_size;
> -                       vcpu_gpa = guest_test_phys_mem +
> -                                  (vcpu_id * vcpu_memory_bytes);
> +                       vcpu_args->gpa = guest_test_phys_mem +
> +                                        (vcpu_id * vcpu_memory_bytes);
>                 } else {
>                         vcpu_args->gva = guest_test_virt_mem;
>                         vcpu_args->pages = (vcpus * vcpu_memory_bytes) /
>                                            pta->guest_page_size;
> -                       vcpu_gpa = guest_test_phys_mem;
> +                       vcpu_args->gpa = guest_test_phys_mem;
>                 }
>
>                 pr_debug("Added VCPU %d with test mem gpa [%lx, %lx)\n",
> -                        vcpu_id, vcpu_gpa, vcpu_gpa +
> +                        vcpu_id, vcpu_args->gpa, vcpu_args->gpa +
>                          (vcpu_args->pages * pta->guest_page_size));
>         }
>  }
> --
> 2.30.0.478.g8a0d178c01-goog
>