linux-kernel - Re: [PATCH 1/4] x86/vmware: Update platform detection code for VMCALL/VMMCALL hypercalls

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Message-ID: <a35a8e27-35f5-c9da-ad2f-c26a12f05408@shipmail.org>
Date:   Sun, 18 Aug 2019 21:46:49 +0200
From:   Thomas Hellström (VMware) 
        <thomas_os@...pmail.org>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     linux-kernel@...r.kernel.org, pv-drivers@...are.com,
        Thomas Hellstrom <thellstrom@...are.com>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        Doug Covelli <dcovelli@...are.com>
Subject: Re: [PATCH 1/4] x86/vmware: Update platform detection code for
 VMCALL/VMMCALL hypercalls

On 8/18/19 9:20 PM, Thomas Gleixner wrote:
> On Sun, 18 Aug 2019, Thomas Hellström (VMware) wrote:
>
>> From: Thomas Hellstrom <thellstrom@...are.com>
>>
>> Vmware has historically used an "inl" instruction for this, but recent
>> hardware versions support using VMCALL/VMMCALL instead, so use this method
>> if supported at platform detection time. We explicitly need to code
>> separate macro versions since the alternatives self-patching has not
>> been performed at platform detection time.
>>
>> We also put tighter constraints on the assembly input parameters and update
>> the SPDX license info.
> Can you please split the license stuff into a separate patch? You know, one
> patch one thing. It's documented for a reason.
>
> While at it could you please ask your legal folks whether that custom
> license boilerplate can go away as well?

Sure, I'll drop that from the series for now.

Thanks,

/Thomas