linux-kernel - Re: [PATCH v5 2/2] Drivers: hv: Introduce mshv

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Message-ID: <45958272-1127-465d-a56e-65d7f0bff1bf@linux.microsoft.com>
Date: Thu, 10 Jul 2025 14:31:08 +0530
From: Naman Jain <namjain@...ux.microsoft.com>
To: Michael Kelley <mhklinux@...look.com>,
 "K . Y . Srinivasan" <kys@...rosoft.com>,
 Haiyang Zhang <haiyangz@...rosoft.com>, Wei Liu <wei.liu@...nel.org>,
 Dexuan Cui <decui@...rosoft.com>
Cc: Roman Kisel <romank@...ux.microsoft.com>,
 Anirudh Rayabharam <anrayabh@...ux.microsoft.com>,
 Saurabh Sengar <ssengar@...ux.microsoft.com>,
 Stanislav Kinsburskii <skinsburskii@...ux.microsoft.com>,
 Nuno Das Neves <nunodasneves@...ux.microsoft.com>,
 ALOK TIWARI <alok.a.tiwari@...cle.com>,
 "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
 "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>
Subject: Re: [PATCH v5 2/2] Drivers: hv: Introduce mshv_vtl driver

On 7/9/2025 10:49 PM, Michael Kelley wrote:
> From: Naman Jain <namjain@...ux.microsoft.com> Sent: Wednesday, June 11, 2025 12:27 AM
>>
>> Provide an interface for Virtual Machine Monitor like OpenVMM and its
>> use as OpenHCL paravisor to control VTL0 (Virtual trust Level).
>> Expose devices and support IOCTLs for features like VTL creation,
>> VTL0 memory management, context switch, making hypercalls,
>> mapping VTL0 address space to VTL2 userspace, getting new VMBus
>> messages and channel events in VTL2 etc.
>>
> 
> I know it has been 4 weeks since you posted this patch, but I'm just
> now getting around to reviewing it. :-(
> 
> I've reviewed most of it reasonably carefully, but there are some
> parts, such as entering/exiting VTLs that I don't know the details of,
> and so just glossed over.
> 

Thanks Michael for your review comments. ARM64, sev-SNP support, along
with other features are in pipeline, and will be taken up once we have a
working driver in, for x86. I'll address your comments and make the
required changes in coming days.

Regards,
Naman

<snip>