linux-kernel - Re: [PATCH v3 0/2] Add support for clean shutdown with MSHV

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Message-ID: <9097e99c-8d80-44c2-9dab-87166760af9b@linux.microsoft.com>
Date: Mon, 27 Oct 2025 13:56:02 -0700
From: Easwar Hariharan <easwar.hariharan@...ux.microsoft.com>
To: Praveen K Paladugu <prapal@...ux.microsoft.com>
Cc: kys@...rosoft.com, haiyangz@...rosoft.com, wei.liu@...nel.org,
 decui@...rosoft.com, tglx@...utronix.de, mingo@...hat.com,
 linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org, bp@...en8.de,
 dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com, arnd@...db.de,
 easwar.hariharan@...ux.microsoft.com, anbelski@...ux.microsoft.com,
 nunodasneves@...ux.microsoft.com, skinsburskii@...ux.microsoft.com
Subject: Re: [PATCH v3 0/2] Add support for clean shutdown with MSHV

On 10/27/2025 1:28 PM, Praveen K Paladugu wrote:
> Add support for clean shutdown of the root partition when running on MSHV
> hypervisor.
> 
> v3:
>  - Dropped acpi_sleep handlers as they are not used on mshv
>  - Applied ordering for hv_reboot_notifier
>  - Fixed build issues on i386, arm64 architectures
> 
> v2:
>   - Addressed review comments from v1.
>   - Moved all sleep state handling methods under CONFIG_ACPI stub
>   - - This fixes build issues on non-x86 architectures.
> 
> Praveen K Paladugu (2):
>   hyperv: Add definitions for MSHV sleep state configuration
>   hyperv: Enable clean shutdown for root partition with MSHV
> 
>  arch/x86/hyperv/hv_init.c       |   8 +++
>  arch/x86/include/asm/mshyperv.h |   2 +
>  drivers/hv/mshv_common.c        | 103 ++++++++++++++++++++++++++++++++
>  include/hyperv/hvgdk_mini.h     |   4 +-
>  include/hyperv/hvhdk_mini.h     |  33 ++++++++++
>  5 files changed, 149 insertions(+), 1 deletion(-)
> 

This series seems to assume that Mukesh's hypervisor crash series has been merged, but that's not the case.
I don't see any code context or logical dependency on that series, but correct me if I'm wrong. If there's no
dependency, can you send a v4 based on Linus' tree or hyperv-next to avoid a merge conflict?

Thanks,
Easwar (he/him)