linux-kernel - Re: [PATCH 23/34] KVM: selftests: Convert lib's mem regions to KVM_SET_USER_MEMORY

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Date:   Mon, 6 Nov 2023 11:03:12 +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 23/34] KVM: selftests: Convert lib's mem regions to KVM_SET_USER_MEMORY_REGION2

On Sun, Nov 5, 2023 at 4:33 PM Paolo Bonzini <pbonzini@...hat.com> wrote:
>
> From: Sean Christopherson <seanjc@...gle.com>
>
> Use KVM_SET_USER_MEMORY_REGION2 throughout KVM's selftests library so that
> support for guest private memory can be added without needing an entirely
> separate set of helpers.
>
> Note, this obviously makes selftests backwards-incompatible with older KVM
> versions from this point forward.
>
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>
> Message-Id: <20231027182217.3615211-26-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     |  2 +-
>  tools/testing/selftests/kvm/lib/kvm_util.c    | 19 ++++++++++---------
>  2 files changed, 11 insertions(+), 10 deletions(-)
>
> diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h
> index 967eaaeacd75..9f144841c2ee 100644
> --- a/tools/testing/selftests/kvm/include/kvm_util_base.h
> +++ b/tools/testing/selftests/kvm/include/kvm_util_base.h
> @@ -44,7 +44,7 @@ typedef uint64_t vm_paddr_t; /* Virtual Machine (Guest) physical address */
>  typedef uint64_t vm_vaddr_t; /* Virtual Machine (Guest) virtual address */
>
>  struct userspace_mem_region {
> -       struct kvm_userspace_memory_region region;
> +       struct kvm_userspace_memory_region2 region;
>         struct sparsebit *unused_phy_pages;
>         int fd;
>         off_t offset;
> diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
> index f09295d56c23..3676b37bea38 100644
> --- a/tools/testing/selftests/kvm/lib/kvm_util.c
> +++ b/tools/testing/selftests/kvm/lib/kvm_util.c
> @@ -453,8 +453,9 @@ void kvm_vm_restart(struct kvm_vm *vmp)
>                 vm_create_irqchip(vmp);
>
>         hash_for_each(vmp->regions.slot_hash, ctr, region, slot_node) {
> -               int ret = ioctl(vmp->fd, KVM_SET_USER_MEMORY_REGION, &region->region);
> -               TEST_ASSERT(ret == 0, "KVM_SET_USER_MEMORY_REGION IOCTL failed,\n"
> +               int ret = ioctl(vmp->fd, KVM_SET_USER_MEMORY_REGION2, &region->region);
> +
> +               TEST_ASSERT(ret == 0, "KVM_SET_USER_MEMORY_REGION2 IOCTL failed,\n"
>                             "  rc: %i errno: %i\n"
>                             "  slot: %u flags: 0x%x\n"
>                             "  guest_phys_addr: 0x%llx size: 0x%llx",
> @@ -657,7 +658,7 @@ static void __vm_mem_region_delete(struct kvm_vm *vm,
>         }
>
>         region->region.memory_size = 0;
> -       vm_ioctl(vm, KVM_SET_USER_MEMORY_REGION, &region->region);
> +       vm_ioctl(vm, KVM_SET_USER_MEMORY_REGION2, &region->region);
>
>         sparsebit_free(&region->unused_phy_pages);
>         ret = munmap(region->mmap_start, region->mmap_size);
> @@ -1014,8 +1015,8 @@ void vm_userspace_mem_region_add(struct kvm_vm *vm,
>         region->region.guest_phys_addr = guest_paddr;
>         region->region.memory_size = npages * vm->page_size;
>         region->region.userspace_addr = (uintptr_t) region->host_mem;
> -       ret = __vm_ioctl(vm, KVM_SET_USER_MEMORY_REGION, &region->region);
> -       TEST_ASSERT(ret == 0, "KVM_SET_USER_MEMORY_REGION IOCTL failed,\n"
> +       ret = __vm_ioctl(vm, KVM_SET_USER_MEMORY_REGION2, &region->region);
> +       TEST_ASSERT(ret == 0, "KVM_SET_USER_MEMORY_REGION2 IOCTL failed,\n"
>                 "  rc: %i errno: %i\n"
>                 "  slot: %u flags: 0x%x\n"
>                 "  guest_phys_addr: 0x%lx size: 0x%lx",
> @@ -1097,9 +1098,9 @@ void vm_mem_region_set_flags(struct kvm_vm *vm, uint32_t slot, uint32_t flags)
>
>         region->region.flags = flags;
>
> -       ret = __vm_ioctl(vm, KVM_SET_USER_MEMORY_REGION, &region->region);
> +       ret = __vm_ioctl(vm, KVM_SET_USER_MEMORY_REGION2, &region->region);
>
> -       TEST_ASSERT(ret == 0, "KVM_SET_USER_MEMORY_REGION IOCTL failed,\n"
> +       TEST_ASSERT(ret == 0, "KVM_SET_USER_MEMORY_REGION2 IOCTL failed,\n"
>                 "  rc: %i errno: %i slot: %u flags: 0x%x",
>                 ret, errno, slot, flags);
>  }
> @@ -1127,9 +1128,9 @@ void vm_mem_region_move(struct kvm_vm *vm, uint32_t slot, uint64_t new_gpa)
>
>         region->region.guest_phys_addr = new_gpa;
>
> -       ret = __vm_ioctl(vm, KVM_SET_USER_MEMORY_REGION, &region->region);
> +       ret = __vm_ioctl(vm, KVM_SET_USER_MEMORY_REGION2, &region->region);
>
> -       TEST_ASSERT(!ret, "KVM_SET_USER_MEMORY_REGION failed\n"
> +       TEST_ASSERT(!ret, "KVM_SET_USER_MEMORY_REGION2 failed\n"
>                     "ret: %i errno: %i slot: %u new_gpa: 0x%lx",
>                     ret, errno, slot, new_gpa);
>  }
> --
> 2.39.1
>
>