linux-kernel - Re: [RFC] Support for Arm CCA VMs on Linux

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Message-ID: <Y/8Y3WLmiw6+Z5AS@myrica>
Date:   Wed, 1 Mar 2023 09:20:29 +0000
From:   Jean-Philippe Brucker <jean-philippe@...aro.org>
To:     Itaru Kitayama <itaru.kitayama@...il.com>
Cc:     Suzuki K Poulose <suzuki.poulose@....com>,
        linux-coco@...ts.linux.dev, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, kvmarm@...ts.linux.dev,
        linux-arm-kernel@...ts.infradead.org,
        Alexandru Elisei <alexandru.elisei@....com>,
        Andrew Jones <andrew.jones@...ux.dev>,
        Catalin Marinas <catalin.marinas@....com>,
        Chao Peng <chao.p.peng@...ux.intel.com>,
        Christoffer Dall <christoffer.dall@....com>,
        Fuad Tabba <tabba@...gle.com>,
        James Morse <james.morse@....com>,
        Joey Gouly <Joey.Gouly@....com>, Marc Zyngier <maz@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Oliver Upton <oliver.upton@...ux.dev>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Quentin Perret <qperret@...gle.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Steven Price <steven.price@....com>,
        Thomas Huth <thuth@...hat.com>, Will Deacon <will@...nel.org>,
        Zenghui Yu <yuzenghui@...wei.com>, kvmarm@...ts.cs.columbia.edu
Subject: Re: [RFC] Support for Arm CCA VMs on Linux

Hi Itaru,

On Wed, Mar 01, 2023 at 08:35:05AM +0900, Itaru Kitayama wrote:
> Hi Jean,
> I've tried your series in Real on CCA Host, but the KVM arch init
> emits an Invalid argument error and terminates.

Do you know which call returns this error?  Normally the RMEGuest support
should print more detailed errors. Are you able to launch normal guests
(without the rme-guest object and confidential-guest-support machine
parameter)?  Could you give the complete QEMU command-line?

> I configure it with the aarch64-softmmu target only and built, any
> other steps I should worry?

No, that should be enough

Thanks,
Jean