linux-kernel - Re: [PATCH v4 0/5] Enable Shadow Stack Virtualization for SVM

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Message-ID: <aMgoGLL65vUPGYW0@AUSJOHALLEN.amd.com>
Date: Mon, 15 Sep 2025 09:52:08 -0500
From: John Allen <john.allen@....com>
To: Sean Christopherson <seanjc@...gle.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org, x86@...nel.org,
	pbonzini@...hat.com, dave.hansen@...el.com,
	rick.p.edgecombe@...el.com, mlevitsk@...hat.com,
	weijiang.yang@...el.com, chao.gao@...el.com, bp@...en8.de,
	dave.hansen@...ux.intel.com, hpa@...or.com, mingo@...hat.com,
	tglx@...utronix.de, thomas.lendacky@....com
Subject: Re: [PATCH v4 0/5] Enable Shadow Stack Virtualization for SVM

On Fri, Sep 12, 2025 at 03:54:31PM -0700, Sean Christopherson wrote:
> On Mon, Sep 08, 2025, John Allen wrote:
> > This series adds support for shadow stack in SVM guests
>                   ^
>                   |
>                 some
> 
> I mean, who cares about nested, right?
> 
> Sorry for being snippy, but I am more than a bit peeved that we're effectively
> on revision 6 of this series, and apparently no one has thought to do even basic
> tested of nested SVM.

Hi Sean,

I have been testing nested with this feature (or so I thought). Can you
explain what you did to test and what wasn't working?

Apologies, and thanks for taking the time to look into the problem.

Thanks,
John