Re: [PATCH v4 0/3] Add support for clean shutdown with MSHV

Easwar Hariharan
2025-11-13T19:26:39Z

On 11/7/2025 2:16 PM, Praveen K Paladugu wrote:
> Add support for clean shutdown of the root partition when running on
> MSHV Hypervisor.
>
> v4:
> - Adopted machine_ops to order invoking HV_ENTER_SLEEP_STATE as the
> last step in shutdown sequence.
> - This ensures rest of the cleanups are done before powering off
>
> 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 (3):
> hyperv: Add definitions for MSHV sleep state configuration
> hyperv: Use reboot notifier to configure sleep state
> hyperv: Cleanly shutdown root partition with MSHV
>
> arch/x86/hyperv/hv_init.c | 9 +++
> arch/x86/include/asm/mshyperv.h | 4 ++
> drivers/hv/mshv_common.c | 99 +++++++++++++++++++++++++++++++++
> include/hyperv/hvgdk_mini.h | 4 +-
> include/hyperv/hvhdk_mini.h | 33 +++++++++++
> 5 files changed, 148 insertions(+), 1 deletion(-)
>
For the series, modulo the lkp complaint about unused status in hv_machine_power_off()

Reviewed-by: Easwar Hariharan <easwar.hariharan@linux.microsoft.com>