linux-kernel - Re: [PING PATCH v4 27/29] LoongArch: KVM: Implement vcpu world switch

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Date:   Tue, 28 Mar 2023 16:13:39 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Tianrui Zhao <zhaotianrui@...ngson.cn>
Cc:     Huacai Chen <chenhuacai@...nel.org>,
        WANG Xuerui <kernel@...0n.name>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        loongarch@...ts.linux.dev, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, Jens Axboe <axboe@...nel.dk>,
        Mark Brown <broonie@...nel.org>,
        Alex Deucher <alexander.deucher@....com>,
        Oliver Upton <oliver.upton@...ux.dev>, maobibo@...ngson.cn,
        Xi Ruoyao <xry111@...111.site>
Subject: Re: [PING PATCH v4 27/29] LoongArch: KVM: Implement vcpu world switch

On 3/28/23 14:31, Tianrui Zhao wrote:
> + * prepare switch to guest
> + * @param:
> + *  KVM_ARCH: kvm_vcpu_arch, don't touch it until 'ertn'
> + *  GPRNUM: KVM_ARCH gpr number

Stale comment (should be "a2: kvm_vcpu_arch, don't touch it until 'ertn'").

Since you are at it, I noticed now that tmp and tmp1 aren't too useful 
because all registers will be overwritten before the end of the macro. 
You choose whether to keep or remove them.

Paolo

> + *  tmp, tmp1: temp register
> + */