linux-kernel - Re: [PATCH 22/34] KVM: selftests: Drop unused kvm_userspace_memory_region

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Message-ID: <CA+EHjTwB-jssz7+8ZiLgXdQREp8U3r3tYN2NOH28g54=QNdQmg@mail.gmail.com>
Date:   Mon, 6 Nov 2023 11:02:40 +0000
From:   Fuad Tabba <tabba@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     Marc Zyngier <maz@...nel.org>,
        Oliver Upton <oliver.upton@...ux.dev>,
        Huacai Chen <chenhuacai@...nel.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Anup Patel <anup@...infault.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Sean Christopherson <seanjc@...gle.com>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Christian Brauner <brauner@...nel.org>,
        "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>, kvm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev,
        linux-mips@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        kvm-riscv@...ts.infradead.org, linux-riscv@...ts.infradead.org,
        linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Xiaoyao Li <xiaoyao.li@...el.com>,
        Xu Yilun <yilun.xu@...el.com>,
        Chao Peng <chao.p.peng@...ux.intel.com>,
        Jarkko Sakkinen <jarkko@...nel.org>,
        Anish Moorthy <amoorthy@...gle.com>,
        David Matlack <dmatlack@...gle.com>,
        Yu Zhang <yu.c.zhang@...ux.intel.com>,
        Isaku Yamahata <isaku.yamahata@...el.com>,
        Mickaël Salaün <mic@...ikod.net>,
        Vlastimil Babka <vbabka@...e.cz>,
        Vishal Annapurve <vannapurve@...gle.com>,
        Ackerley Tng <ackerleytng@...gle.com>,
        Maciej Szmigiero <mail@...iej.szmigiero.name>,
        David Hildenbrand <david@...hat.com>,
        Quentin Perret <qperret@...gle.com>,
        Michael Roth <michael.roth@....com>,
        Wang <wei.w.wang@...el.com>,
        Liam Merwick <liam.merwick@...cle.com>,
        Isaku Yamahata <isaku.yamahata@...il.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: Re: [PATCH 22/34] KVM: selftests: Drop unused kvm_userspace_memory_region_find()
 helper

On Sun, Nov 5, 2023 at 4:33 PM Paolo Bonzini <pbonzini@...hat.com> wrote:
>
> From: Sean Christopherson <seanjc@...gle.com>
>
> Drop kvm_userspace_memory_region_find(), it's unused and a terrible API
> (probably why it's unused).  If anything outside of kvm_util.c needs to
> get at the memslot, userspace_mem_region_find() can be exposed to give
> others full access to all memory region/slot information.
>
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>
> Message-Id: <20231027182217.3615211-25-seanjc@...gle.com>
> Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
> ---

Reviewed-by: Fuad Tabba <tabba@...gle.com>
Tested-by: Fuad Tabba <tabba@...gle.com>

Cheers,
/fuad

>  .../selftests/kvm/include/kvm_util_base.h     |  4 ---
>  tools/testing/selftests/kvm/lib/kvm_util.c    | 29 -------------------
>  2 files changed, 33 deletions(-)
>
> diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h
> index a18db6a7b3cf..967eaaeacd75 100644
> --- a/tools/testing/selftests/kvm/include/kvm_util_base.h
> +++ b/tools/testing/selftests/kvm/include/kvm_util_base.h
> @@ -776,10 +776,6 @@ vm_adjust_num_guest_pages(enum vm_guest_mode mode, unsigned int num_guest_pages)
>         return n;
>  }
>
> -struct kvm_userspace_memory_region *
> -kvm_userspace_memory_region_find(struct kvm_vm *vm, uint64_t start,
> -                                uint64_t end);
> -
>  #define sync_global_to_guest(vm, g) ({                         \
>         typeof(g) *_p = addr_gva2hva(vm, (vm_vaddr_t)&(g));     \
>         memcpy(_p, &(g), sizeof(g));                            \
> diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
> index 7a8af1821f5d..f09295d56c23 100644
> --- a/tools/testing/selftests/kvm/lib/kvm_util.c
> +++ b/tools/testing/selftests/kvm/lib/kvm_util.c
> @@ -590,35 +590,6 @@ userspace_mem_region_find(struct kvm_vm *vm, uint64_t start, uint64_t end)
>         return NULL;
>  }
>
> -/*
> - * KVM Userspace Memory Region Find
> - *
> - * Input Args:
> - *   vm - Virtual Machine
> - *   start - Starting VM physical address
> - *   end - Ending VM physical address, inclusive.
> - *
> - * Output Args: None
> - *
> - * Return:
> - *   Pointer to overlapping region, NULL if no such region.
> - *
> - * Public interface to userspace_mem_region_find. Allows tests to look up
> - * the memslot datastructure for a given range of guest physical memory.
> - */
> -struct kvm_userspace_memory_region *
> -kvm_userspace_memory_region_find(struct kvm_vm *vm, uint64_t start,
> -                                uint64_t end)
> -{
> -       struct userspace_mem_region *region;
> -
> -       region = userspace_mem_region_find(vm, start, end);
> -       if (!region)
> -               return NULL;
> -
> -       return &region->region;
> -}
> -
>  __weak void vcpu_arch_free(struct kvm_vcpu *vcpu)
>  {
>
> --
> 2.39.1
>
>