linux-kernel - Re: [PATCHv2 2/4] arm64: add guest pvstate support

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Message-ID: <YOgAIOBVhhD+on93@google.com>
Date:   Fri, 9 Jul 2021 16:52:00 +0900
From:   Sergey Senozhatsky <senozhatsky@...omium.org>
To:     David Edmondson <dme@....org>
Cc:     Sergey Senozhatsky <senozhatsky@...omium.org>,
        Marc Zyngier <maz@...nel.org>, Will Deacon <will@...nel.org>,
        Suleiman Souhlal <suleiman@...gle.com>,
        Joel Fernandes <joelaf@...gle.com>,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
        linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org
Subject: Re: [PATCHv2 2/4] arm64: add guest pvstate support

On (21/07/09 08:39), David Edmondson wrote:
[..]
> > +
> > +static bool has_pv_vcpu_state(void)
> > +{
> > +	struct arm_smccc_res res;
> > +
> > +	/* To detect the presence of PV time support we require SMCCC 1.1+ */
> 
> "PV VCPU state support" rather than "PV time support".

Indeed. Thanks.

[..]
> > +static int pv_vcpu_state_register_hooks(void)
> > +{
> > +	int ret;
> > +
> > +	ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN,
> > +				"hypervisor/arm/pvstate:starting",
> > +				vcpu_state_init,
> > +				vcpu_state_release);
> > +	if (ret < 0)
> > +		pr_warn("Failed to register CPU hooks\n");
> 
> Include that it's PV VCPU state hooks?

Ack.