linux-kernel - Re: [PATCH 0/3] KVM: selftests: Consolidate ucall code

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Message-ID: <19bba1a0-8fb7-2aae-a65a-1111e29b92d3@redhat.com>
Date:   Mon, 20 Jun 2022 14:03:58 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Sean Christopherson <seanjc@...gle.com>,
        Marc Zyngier <maz@...nel.org>,
        Anup Patel <anup@...infault.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Janosch Frank <frankja@...ux.ibm.com>,
        Claudio Imbrenda <imbrenda@...ux.ibm.com>
Cc:     James Morse <james.morse@....com>,
        Alexandru Elisei <alexandru.elisei@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Atish Patra <atishp@...shpatra.org>,
        David Hildenbrand <david@...hat.com>, kvm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
        kvm-riscv@...ts.infradead.org, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        Colton Lewis <coltonlewis@...gle.com>,
        Andrew Jones <drjones@...hat.com>
Subject: Re: [PATCH 0/3] KVM: selftests: Consolidate ucall code

On 6/18/22 02:16, Sean Christopherson wrote:
> Consolidate the code for making and getting ucalls.  All architectures pass
> the ucall struct via memory, so filling and copying the struct is 100%
> generic.  The only per-arch code is sending and receiving the address of
> said struct.
> 
> Tested on x86 and arm, compile tested on s390 and RISC-V.

I'm not sure about doing this yet.  The SEV tests added multiple 
implementations of the ucalls in one architecture.  I have rebased those 
recently (not the SEV part) to get more familiar with the new kvm_vcpu 
API for selftests, and was going to look at your old review next...

Paolo