linux-kernel - Re: [PATCH 2/7] KVM: x86: Implement Hyper-V's vCPU suspended state

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Message-ID: <D4WJTFFVQ5XN.13Z7NABE3IRSM@amazon.com>
Date: Tue, 15 Oct 2024 17:16:49 +0000
From: Nicolas Saenz Julienne <nsaenz@...zon.com>
To: Sean Christopherson <seanjc@...gle.com>, Vitaly Kuznetsov
	<vkuznets@...hat.com>
CC: Nikolas Wipper <nik.wipper@....de>, Nikolas Wipper <nikwip@...zon.de>,
	Alexander Graf <graf@...zon.de>, James Gowans <jgowans@...zon.com>,
	<nh-open-source@...zon.com>, Paolo Bonzini <pbonzini@...hat.com>, "Thomas
 Gleixner" <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, "Borislav
 Petkov" <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>,
	<linux-kernel@...r.kernel.org>, <kvm@...r.kernel.org>, <x86@...nel.org>,
	<linux-doc@...r.kernel.org>, <linux-kselftest@...r.kernel.org>
Subject: Re: [PATCH 2/7] KVM: x86: Implement Hyper-V's vCPU suspended state

Hi Sean,

On Tue Oct 15, 2024 at 3:58 PM UTC, Sean Christopherson wrote:
> Before we spend too much time cleaning things up, I want to first settle on the
> overall design, because it's not clear to me that punting HvTranslateVirtualAddress
> to userspace is a net positive.  We agreed that VTLs should be modeled primarily
> in userspace, but that doesn't automatically make punting everything to userspace
> the best option, especially given the discussion at KVM Forum with respect to
> mplementing VTLs, VMPLs, TD partitions, etc.

Since you mention it, Paolo said he was going to prep a doc with an
overview of the design we discussed there. Was it published? Did I miss
it?

Thanks,
Nicolas