linux-kernel - Re: [PATCH RFC 2/4] xen/pvhvm: Introduce xen_pvhvm_kexec

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Message-ID: <53D651EF.8080807@citrix.com>
Date:	Mon, 28 Jul 2014 14:36:47 +0100
From:	David Vrabel <david.vrabel@...rix.com>
To:	Vitaly Kuznetsov <vkuznets@...hat.com>,
	<xen-devel@...ts.xenproject.org>
CC:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	Stefano Stabellini <stefano.stabellini@...citrix.com>,
	Andrew Jones <drjones@...hat.com>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH RFC 2/4] xen/pvhvm: Introduce xen_pvhvm_kexec_shutdown()

On 15/07/14 14:40, Vitaly Kuznetsov wrote:
> PVHVM guest requires special actions before kexec. Register specific
> xen_pvhvm_kexec_shutdown() handler for machine_ops.shutdown().
[...]
> --- a/arch/x86/xen/enlighten.c
> +++ b/arch/x86/xen/enlighten.c
> @@ -1833,6 +1833,12 @@ static struct notifier_block xen_hvm_cpu_notifier = {
>  	.notifier_call	= xen_hvm_cpu_notify,
>  };
>  
> +static void xen_pvhvm_kexec_shutdown(void)
> +{
> +	xen_kexec_shutdown();

I think it would be preferrable to have

    if (kexec_in_progress)
        xen_kexec_shutdown();

David
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