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:

quoted

On Wed, Aug 04, 2021 at 08:52:39AM -0700, Michael Kelley wrote:

quoted

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 <redacted>
Reviewed-by: Boqun Feng <redacted>
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

quoted

Anyway, I can fix it up locally.

I can fix it up while I queue these patches.

Wei.