On Thu, Nov 03, 2022 at 03:30:35AM +0000, Michael Kelley (LINUX) wrote: > From: Jinank Jain <jinankjain@xxxxxxxxxxxxxxxxxxx> Sent: Wednesday, November 2, 2022 9:36 AM > > > > Currently VMBus driver is not initialized for root partition but we need > > to enable the VMBus driver for nested root partition. This is required > > to expose VMBus devices to the L2 guest in the nested setup. > > > > Signed-off-by: Jinank Jain <jinankjain@xxxxxxxxxxxxxxxxxxx> > > --- > > drivers/hv/vmbus_drv.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c > > index 8b2e413bf19c..2f0cf75e811b 100644 > > --- a/drivers/hv/vmbus_drv.c > > +++ b/drivers/hv/vmbus_drv.c > > @@ -2723,7 +2723,7 @@ static int __init hv_acpi_init(void) > > if (!hv_is_hyperv_initialized()) > > return -ENODEV; > > > > - if (hv_root_partition) > > + if (hv_root_partition && !hv_nested) > > Note that this code must compile and run when Linux is built > to run as a guest on Hyper-V for ARM64. There's currently > no definition for hv_nested on the ARM64 side, so the compile > will fail. But per my comments in Patch 1 in this series, using the > same technique as for hv_root_partition in hv_common.c should > solve the ARM64 problem as well. Jinank, you can use the following commands to cross-compile Linux. make ARCH=arm64 mshv_defconfig make -j$(nproc) ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- Image I think there are some follow-up patches in the internal tree which fixed the arm64 build. You may be able to squash some of those patches into series. Thanks, Wei.
