From mboxrd@z Thu Jan  1 00:00:00 1970
From: Aravind Gopalakrishnan <aravind.gopalakrishnan@amd.com>
Subject: Re: [PATCH] switch hypercall restart indication from
	-EAGAIN to -ERESTART
Date: Mon, 12 May 2014 10:16:12 -0500
Message-ID: <5370E5BC.80404@amd.com>
References: <5370EDB40200007800011718@mail.emea.novell.com>
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To: Jan Beulich <JBeulich@suse.com>, xen-devel <xen-devel@lists.xenproject.org>
Cc: Kevin Tian <kevin.tian@intel.com>, Keir Fraser <keir@xen.org>, Jun Nakajima <jun.nakajima@intel.com>, Eddie Dong <eddie.dong@intel.com>, Ian Jackson <Ian.Jackson@eu.citrix.com>, Tim Deegan <tim@xen.org>, Ian Campbell <Ian.Campbell@eu.citrix.com>, Stefano Stabellini <stefano.stabellini@citrix.com>, suravee.suthikulpanit@amd.com, Boris Ostrovsky <boris.ostrovsky@oracle.com>
List-Id: xen-devel@lists.xenproject.org

On 5/12/2014 8:50 AM, Jan Beulich wrote:
> -EAGAIN being a return value we want to return to the actual caller in
> a couple of cases makes this unsuitable for restart indication, and x86
> already developed two cases where -EAGAIN could not be returned as
> intended due to this (which is being fixed here at once).
>
> Signed-off-by: Jan Beulich <jbeulich@suse.com>
>
>
> --- a/xen/arch/x86/hvm/svm/svm.c
> +++ b/xen/arch/x86/hvm/svm/svm.c
> @@ -1827,7 +1827,7 @@ static int svm_msr_write_intercept(unsig
>   
>           switch ( wrmsr_hypervisor_regs(msr, msr_content) )
>           {
> -        case -EAGAIN:
> +        case -ERESTART:
>               result = X86EMUL_RETRY;
>               break;
>           case 0:
>

Acked-by: Aravind Gopalakrishnan<Aravind.Gopalakrishnan@amd.com>