linux-kernel - Re: [PATCH 28/34] KVM: selftests: Add GUEST_SYNC[1-6] macros for synchronizing more data

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Date:   Mon, 6 Nov 2023 11:44:47 +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 28/34] KVM: selftests: Add GUEST_SYNC[1-6] macros for
 synchronizing more data

On Sun, Nov 5, 2023 at 4:34 PM Paolo Bonzini <pbonzini@...hat.com> wrote:
>
> From: Sean Christopherson <seanjc@...gle.com>
>
> Add GUEST_SYNC[1-6]() so that tests can pass the maximum amount of
> information supported via ucall(), without needing to resort to shared
> memory.
>
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>
> Message-Id: <20231027182217.3615211-31-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

>  tools/testing/selftests/kvm/include/ucall_common.h | 11 +++++++++++
>  1 file changed, 11 insertions(+)
>
> diff --git a/tools/testing/selftests/kvm/include/ucall_common.h b/tools/testing/selftests/kvm/include/ucall_common.h
> index ce33d306c2cb..0fb472a5a058 100644
> --- a/tools/testing/selftests/kvm/include/ucall_common.h
> +++ b/tools/testing/selftests/kvm/include/ucall_common.h
> @@ -52,6 +52,17 @@ int ucall_nr_pages_required(uint64_t page_size);
>  #define GUEST_SYNC_ARGS(stage, arg1, arg2, arg3, arg4) \
>                                 ucall(UCALL_SYNC, 6, "hello", stage, arg1, arg2, arg3, arg4)
>  #define GUEST_SYNC(stage)      ucall(UCALL_SYNC, 2, "hello", stage)
> +#define GUEST_SYNC1(arg0)      ucall(UCALL_SYNC, 1, arg0)
> +#define GUEST_SYNC2(arg0, arg1)        ucall(UCALL_SYNC, 2, arg0, arg1)
> +#define GUEST_SYNC3(arg0, arg1, arg2) \
> +                               ucall(UCALL_SYNC, 3, arg0, arg1, arg2)
> +#define GUEST_SYNC4(arg0, arg1, arg2, arg3) \
> +                               ucall(UCALL_SYNC, 4, arg0, arg1, arg2, arg3)
> +#define GUEST_SYNC5(arg0, arg1, arg2, arg3, arg4) \
> +                               ucall(UCALL_SYNC, 5, arg0, arg1, arg2, arg3, arg4)
> +#define GUEST_SYNC6(arg0, arg1, arg2, arg3, arg4, arg5) \
> +                               ucall(UCALL_SYNC, 6, arg0, arg1, arg2, arg3, arg4, arg5)
> +
>  #define GUEST_PRINTF(_fmt, _args...) ucall_fmt(UCALL_PRINTF, _fmt, ##_args)
>  #define GUEST_DONE()           ucall(UCALL_DONE, 0)
>
> --
> 2.39.1
>
>