linux-kernel - RE: [PATCH v2 1/2] x86/hyperv: Fix hyperv_pcpu_input

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Message-ID: <BYAPR21MB168882149A235E16CDECA1D8D750A@BYAPR21MB1688.namprd21.prod.outlook.com>
Date:   Thu, 8 Jun 2023 14:39:23 +0000
From:   "Michael Kelley (LINUX)" <mikelley@...rosoft.com>
To:     "bp@...en8.de" <bp@...en8.de>
CC:     KY Srinivasan <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Dexuan Cui <decui@...rosoft.com>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
        "will@...nel.org" <will@...nel.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
        "hpa@...or.com" <hpa@...or.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        Wei Liu <wei.liu@...nel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "x86@...nel.org" <x86@...nel.org>
Subject: RE: [PATCH v2 1/2] x86/hyperv: Fix hyperv_pcpu_input_arg handling
 when CPUs go online/offline

From: Wei Liu <wei.liu@...nel.org>
> 
> On Tue, May 23, 2023 at 10:14:21AM -0700, Michael Kelley wrote:
> [...]
> > diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h
> > index 0f1001d..3ceb9df 100644
> > --- a/include/linux/cpuhotplug.h
> > +++ b/include/linux/cpuhotplug.h
> > @@ -200,6 +200,7 @@ enum cpuhp_state {
> >
> >  	/* Online section invoked on the hotplugged CPU from the hotplug thread */
> >  	CPUHP_AP_ONLINE_IDLE,
> > +	CPUHP_AP_HYPERV_ONLINE,
> 
> x86 maintainers, are you okay with this?
> 

Boris -- Are you OK with this, and could give an ACK?  This small patch
set fixes a problem introduced into 6.4-rc1 by other Confidential VM
changes, so this fix needs to be incorporated before 6.4 is released.

Michael

> >  	CPUHP_AP_KVM_ONLINE,
> >  	CPUHP_AP_SCHED_WAIT_EMPTY,
> >  	CPUHP_AP_SMPBOOT_THREADS,
> > --
> > 1.8.3.1
> >