> From: linux-hyperv-ow...@vger.kernel.org
> > ...
> > When a Linux guest runs on Hyper-V (x86_32, x86_64, or ARM64) , we have a
> > front-end balloon driver in the guest, which balloons up/down and
> > hot adds/removes the guest's memory when the host requests that. The
> > problem
> > is: the bac
> > From: linux-hyperv-ow...@vger.kernel.org
> > On Behalf Of Lorenzo Pieralisi
> > Sent: Monday, June 17, 2019 9:15 AM
> > > ...
> > > + some ARM experts who worked on arch/arm/kernel/hibernate.c.
> > >
> > > drivers/acpi/sleep.c is only built if ACPI_SYSTEM_POWER_STATES_SUPPORT
> > > is defined,
> From: linux-hyperv-ow...@vger.kernel.org
> On Behalf Of Lorenzo Pieralisi
> Sent: Monday, June 17, 2019 9:15 AM
> > ...
> > + some ARM experts who worked on arch/arm/kernel/hibernate.c.
> >
> > drivers/acpi/sleep.c is only built if ACPI_SYSTEM_POWER_STATES_SUPPORT
> > is defined, but it looks th
m;
> > erik.schma...@intel.com
> > Cc: linux-hyp...@vger.kernel.org; linux-kernel@vger.kernel.org; KY
> > Srinivasan
> > ; Stephen Hemminger ;
> > Haiyang Zhang ; Sasha Levin
> > ; o...@aepfle.de; a...@canonical.com;
> > jasow...@redhat.com; vkuznets ;
&
> > It seems that sleep.c isn't built when on the ARM64 architecture. Using
> > acpi_sleep_state_supported() directly in hv_balloon.c will be problematic
> > since hv_balloon.c needs to be architecture independent when the
> > Hyper-V ARM64 support is added. If that doesn't change, a per-archite
Hi!
> > > In a Linux VM running on Hyper-V, when ACPI S4 is enabled, the balloon
> > > driver (drivers/hv/hv_balloon.c) needs to ask the host not to do memory
> > > hot-add/remove.
> > >
> > > So let's export acpi_sleep_state_supported() for the hv_balloon driver.
> > > This might also be useful t
> From: linux-hyperv-ow...@vger.kernel.org
> On Behalf Of Russell King
> On Fri, Jun 14, 2019 at 10:19:02PM +, Dexuan Cui wrote:
> > It looks ARM does not support the ACPI S4 state, then how do we know
> > if an ARM host supports hibernation or not?
>
> Don't forget that Linux does not suppor
o...@intel.com;
> > erik.schma...@intel.com
> > Cc: linux-hyp...@vger.kernel.org; linux-kernel@vger.kernel.org; KY
> > Srinivasan
> > ; Stephen Hemminger ;
> > Haiyang Zhang ; Sasha Levin
> > ; o...@aepfle.de; a...@canonical.com;
> > jasow...@redhat.com; vkuz
l@vger.kernel.org; KY Srinivasan
> ; Stephen Hemminger ;
> Haiyang Zhang ; Sasha Levin
> ; o...@aepfle.de; a...@canonical.com;
> jasow...@redhat.com; vkuznets ;
> marcelo.ce...@canonical.com
> Subject: RE: [PATCH] ACPI: PM: Export the function
> acpi_sleep_state_supported()
>
From: Dexuan Cui Sent: Friday, June 14, 2019 11:19 AM
>
> In a Linux VM running on Hyper-V, when ACPI S4 is enabled, the balloon
> driver (drivers/hv/hv_balloon.c) needs to ask the host not to do memory
> hot-add/remove.
>
> So let's export acpi_sleep_state_supported() for the hv_balloon driver
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