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From: Michael Kelley <mikelley@microsoft.com>
To: Wei Liu <wei.liu@kernel.org>, Catalin Marinas <catalin.marinas@arm.com>
Cc: "will@kernel.org" <will@kernel.org>,
	Mark Rutland <Mark.Rutland@arm.com>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>,
	"linux-efi@vger.kernel.org" <linux-efi@vger.kernel.org>,
	KY Srinivasan <kys@microsoft.com>,
	Stephen Hemminger <sthemmin@microsoft.com>,
	"ardb@kernel.org" <ardb@kernel.org>
Subject: RE: [PATCH v12 5/5] Drivers: hv: Enable Hyper-V code to be built on ARM64
Date: Wed, 4 Aug 2021 16:43:00 +0000	[thread overview]
Message-ID: <MWHPR21MB15939FD6BE722550ED25FA5CD7F19@MWHPR21MB1593.namprd21.prod.outlook.com> (raw)
In-Reply-To: <20210804164029.6xmloksmssrdsmvo@liuwe-devbox-debian-v2>

From: Wei Liu <wei.liu@kernel.org> Sent: Wednesday, August 4, 2021 9:40 AM
> 
> On Wed, Aug 04, 2021 at 05:10:41PM +0100, Catalin Marinas wrote:
> > On Wed, Aug 04, 2021 at 08:52:39AM -0700, Michael Kelley wrote:
> > > Update drivers/hv/Kconfig so CONFIG_HYPERV can be selected on
> > > ARM64, causing the Hyper-V specific code to be built. Exclude the
> > > Hyper-V enlightened clocks/timers code from being built for ARM64.
> > >
> > > Signed-off-by: Michael Kelley <mikelley@microsoft.com>
> > > Reviewed-by: Boqun Feng <boqun.feng@gmail.com>
> > > Acked-by: Marc Zyngier <maz@kernel.org>
> > > Acked-by: Mark Rutland <mark.rutland@arm.com>
> > >
> > > ---
> > >  drivers/hv/Kconfig | 5 +++--
> > >  1 file changed, 3 insertions(+), 2 deletions(-)
> > >
> > > diff --git a/drivers/hv/Kconfig b/drivers/hv/Kconfig
> > > index 66c794d..e509d5d 100644
> > > --- a/drivers/hv/Kconfig
> > > +++ b/drivers/hv/Kconfig
> > > @@ -4,7 +4,8 @@ menu "Microsoft Hyper-V guest support"
> > >
> > >  config HYPERV
> > >  	tristate "Microsoft Hyper-V client drivers"
> > > -	depends on X86 && ACPI && X86_LOCAL_APIC && HYPERVISOR_GUEST
> > > +	depends on ACPI && ((X86 && X86_LOCAL_APIC && HYPERVISOR_GUEST) \
> > > +		|| (ARM64 && !CPU_BIG_ENDIAN))
> > >  	select PARAVIRT
> > >  	select X86_HV_CALLBACK_VECTOR
> >
> > Does this need to be:
> >
> > 	select X86_HV_CALLBACK_VECTOR if X86
> >
> > I haven't checked whether it gives a warning on arm64 but that symbol
> > doesn't exist.

The symbol is only referenced in code under arch/x86, so there's
no warning when building for arm64.  But yes, it would be good
hygiene to add the "if X86".

Michael

> >
> > Anyway, I can fix it up locally.
> 
> I can fix it up while I queue these patches.
> 
> Wei.





  reply	other threads:[~2021-08-04 16:43 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-04 15:52 [PATCH v12 0/5] Enable Linux guests on Hyper-V " Michael Kelley
2021-08-04 15:52 ` [PATCH v12 1/5] arm64: hyperv: Add Hyper-V hypercall and register access utilities Michael Kelley
2021-08-04 15:52 ` [PATCH v12 2/5] arm64: hyperv: Add panic handler Michael Kelley
2021-08-04 15:52 ` [PATCH v12 3/5] arm64: hyperv: Initialize hypervisor on boot Michael Kelley
2021-08-04 15:52 ` [PATCH v12 4/5] arm64: efi: Export screen_info Michael Kelley
2021-08-04 15:52 ` [PATCH v12 5/5] Drivers: hv: Enable Hyper-V code to be built on ARM64 Michael Kelley
2021-08-04 16:10   ` Catalin Marinas
2021-08-04 16:40     ` Wei Liu
2021-08-04 16:43       ` Michael Kelley [this message]
2021-08-04 16:25 ` [PATCH v12 0/5] Enable Linux guests on Hyper-V " Catalin Marinas
2021-08-04 16:37   ` Wei Liu
2021-08-04 16:39   ` Michael Kelley
2021-08-04 16:43     ` Catalin Marinas
2021-08-04 16:58 ` Wei Liu

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