linux-kernel - Re: [External] [PATCH v2 0/5] x86-64: Remove global variables from boot

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Date:   Sat, 25 Feb 2023 13:52:49 +0000
From:   David Woodhouse <dwmw2@...radead.org>
To:     Usama Arif <usama.arif@...edance.com>,
        Brian Gerst <brgerst@...il.com>,
        Yuan Yao <yuan.yao@...ux.intel.com>
Cc:     linux-kernel@...r.kernel.org, x86@...nel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Andy Lutomirski <luto@...nel.org>,
        Ingo Molnar <mingo@...nel.org>
Subject: Re: [External] [PATCH v2 0/5] x86-64: Remove global variables from
 boot

On Sat, 2023-02-25 at 13:33 +0000, Usama Arif wrote:
> 
> Yeah looks good! I am testing with the macro diff for tr_lock from 
> https://lore.kernel.org/all/05e27a7a-1faa-944e-2764-6ab4d620fb8f@bytedance.com/.
> If it all works, happy for me to send out v12 with it?

I moved the macro definition up a little to put it between the .code16
and the .align, pushed it out as a commit on top of the above branch.

We'll collapse it into the 'Support parallel startup' patch, yes?

> > I can probably work out how to test the AMD SEV path; is there a
> > way I can test the startup_64 MADT one?
> 
> I guess the easiest way is to create a TDX VM on Sapphire Rapids which I 
> believe mostly Intel people have access to right now? Maybe we can post 
> v12 and someone from Intel could just quickly verify if it boots with
> it? I have added Yuan from the other thread in here who pointed it out 
> initially.

Yeah, I should also be able to rustle up both SPR and SEV-SNP if I dig
around at work a little.

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