linux-kernel - Re: kexec reboot fails with extra wbinvd introduced for AME SME

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Date:   Thu, 18 Jan 2018 09:50:52 +0800
From:   Dave Young <dyoung@...hat.com>
To:     Tom Lendacky <thomas.lendacky@....com>
Cc:     Yu Chen <yu.c.chen@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Juergen Gross <jgross@...e.com>,
        Tony Luck <tony.luck@...el.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Borislav Petkov <bp@...en8.de>,
        Rui Zhang <rui.zhang@...el.com>,
        Arjan van de Ven <arjan@...ux.intel.com>,
        Dan Williams <dan.j.williams@...el.com>, mingo@...nel.org,
        kexec@...ts.infradead.org, linux-kernel@...r.kernel.org,
        ebiederm@...hat.com, bhe@...hat.com, torvalds@...ux-foundation.org
Subject: Re: kexec reboot fails with extra wbinvd introduced for AME SME

On 01/17/18 at 09:06am, Tom Lendacky wrote:
> On 1/17/2018 1:22 AM, Dave Young wrote:
> > [Modify the subject since this is a new problem, original io vector
> > issue has been fixed with one commit from Thomas]
> > 
> > Add more cc according to below old discussion:
> > https://lkml.org/lkml/2017/7/27/574
> > 
> > Tom, I'm not sure why you finally did not dynamically run wbinvd?
> 
> That discussion was aimed at the wbinvd that was being performed
> in arch/x86/kernel/relocate_kernel_64.S, which is dynamically
> run based on a flag.

Oh, I did not notice that, sorry for referring a wrong discussion.

[snip]

Thanks
Dave