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

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Message-ID: <a50ef2a9-44da-4154-8a4a-a21a7bf15836@linux.microsoft.com>
Date: Mon, 27 Oct 2025 16:11:13 -0500
From: Praveen K Paladugu <prapal@...ux.microsoft.com>
To: Easwar Hariharan <easwar.hariharan@...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,
 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 3:56 PM, Easwar Hariharan wrote:
> 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?
> 

I rebased this patchset on top of hyperv/hyperv-next branch, which has 
crashdump patches: 
https://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git/log/?h=hyperv-next

Let me know if I missed/misunderstood anything.


> Thanks,
> Easwar (he/him)