Re: [PATCH v13 25/35] KVM: selftests: Convert lib's mem regions to KVM_SET_USER_MEMORY_REGION2

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To: "Sean Christopherson" <seanjc@xxxxxxxxxx>, "Shuah Khan" <skhan@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [PATCH v13 25/35] KVM: selftests: Convert lib's mem regions to KVM_SET_USER_MEMORY_REGION2
From: "Jarkko Sakkinen" <jarkko@xxxxxxxxxx>
Date: Fri, 26 Apr 2024 10:33:40 +0300
Cc: "Dan Carpenter" <dan.carpenter@xxxxxxxxxx>, "Shuah Khan" <shuah@xxxxxxxxxx>, "Greg Kroah-Hartman" <gregkh@xxxxxxxxxxxxxxxxxxx>, "Paolo Bonzini" <pbonzini@xxxxxxxxxx>, "Marc Zyngier" <maz@xxxxxxxxxx>, "Oliver Upton" <oliver.upton@xxxxxxxxx>, "Huacai Chen" <chenhuacai@xxxxxxxxxx>, "Michael Ellerman" <mpe@xxxxxxxxxxxxxx>, "Anup Patel" <anup@xxxxxxxxxxxxxx>, "Paul Walmsley" <paul.walmsley@xxxxxxxxxx>, "Palmer Dabbelt" <palmer@xxxxxxxxxxx>, "Albert Ou" <aou@xxxxxxxxxxxxxxxxx>, "Alexander Viro" <viro@xxxxxxxxxxxxxxxxxx>, "Christian Brauner" <brauner@xxxxxxxxxx>, "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>, "Andrew Morton" <akpm@xxxxxxxxxxxxxxxxxxxx>, <kvm@xxxxxxxxxxxxxxx>, <linux-arm-kernel@xxxxxxxxxxxxxxxxxxx>, <kvmarm@xxxxxxxxxxxxxxx>, <linux-mips@xxxxxxxxxxxxxxx>, <linuxppc-dev@xxxxxxxxxxxxxxxx>, <kvm-riscv@xxxxxxxxxxxxxxxxxxx>, <linux-riscv@xxxxxxxxxxxxxxxxxxx>, <linux-fsdevel@xxxxxxxxxxxxxxx>, <linux-mm@xxxxxxxxx>, <linux-kernel@xxxxxxxxxxxxxxx>, "Xiaoyao Li" <xiaoyao.li@xxxxxxxxx>, "Xu Yilun" <yilun.xu@xxxxxxxxx>, "Chao Peng" <chao.p.peng@xxxxxxxxxxxxxxx>, "Fuad Tabba" <tabba@xxxxxxxxxx>, "Anish Moorthy" <amoorthy@xxxxxxxxxx>, "David Matlack" <dmatlack@xxxxxxxxxx>, "Yu Zhang" <yu.c.zhang@xxxxxxxxxxxxxxx>, "Isaku Yamahata" <isaku.yamahata@xxxxxxxxx>, Mickaël Salaün <mic@xxxxxxxxxxx>, "Vlastimil Babka" <vbabka@xxxxxxx>, "Vishal Annapurve" <vannapurve@xxxxxxxxxx>, "Ackerley Tng" <ackerleytng@xxxxxxxxxx>, "Maciej Szmigiero" <mail@xxxxxxxxxxxxxxxxxxxxx>, "David Hildenbrand" <david@xxxxxxxxxx>, "Quentin Perret" <qperret@xxxxxxxxxx>, "Michael Roth" <michael.roth@xxxxxxx>, "Wang" <wei.w.wang@xxxxxxxxx>, "Liam Merwick" <liam.merwick@xxxxxxxxxx>, "Isaku Yamahata" <isaku.yamahata@xxxxxxxxx>, "Kirill A . Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>, "Naresh Kamboju" <naresh.kamboju@xxxxxxxxxx>, "Anders Roxell" <anders.roxell@xxxxxxxxxx>, "Benjamin Copeland" <ben.copeland@xxxxxxxxxx>
In-reply-to: <ZipyPYR8Nv_usoU4@google.com>
References: <20231027182217.3615211-1-seanjc@google.com> <20231027182217.3615211-26-seanjc@google.com> <69ae0694-8ca3-402c-b864-99b500b24f5d@moroto.mountain> <3848a9ad-07aa-48da-a2b7-264c4a990b5b@linuxfoundation.org> <ZipyPYR8Nv_usoU4@google.com>

On Thu Apr 25, 2024 at 6:09 PM EEST, Sean Christopherson wrote:
> +       __TEST_REQUIRE(kvm_has_cap(KVM_CAP_USER_MEMORY2),
> +                      "KVM selftests from v6.8+ require KVM_SET_USER_MEMORY_REGION2");

This would work also for casual (but not seasoned) visitor in KVM code
as additionl documentation.

BR, Jarkko

References:
- [PATCH v13 00/35] KVM: guest_memfd() and per-page attributes
  - From: Sean Christopherson
- [PATCH v13 25/35] KVM: selftests: Convert lib's mem regions to KVM_SET_USER_MEMORY_REGION2
  - From: Sean Christopherson
- Re: [PATCH v13 25/35] KVM: selftests: Convert lib's mem regions to KVM_SET_USER_MEMORY_REGION2
  - From: Dan Carpenter
- Re: [PATCH v13 25/35] KVM: selftests: Convert lib's mem regions to KVM_SET_USER_MEMORY_REGION2
  - From: Shuah Khan
- Re: [PATCH v13 25/35] KVM: selftests: Convert lib's mem regions to KVM_SET_USER_MEMORY_REGION2
  - From: Sean Christopherson

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