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Date:   Thu, 3 Nov 2022 12:32:06 +0530
From:   Anirudh Rayabharam <anrayabh@linux.microsoft.com>
To:     Jinank Jain <jinankjain@linux.microsoft.com>
Cc:     jinankjain@microsoft.com, kys@microsoft.com,
        haiyangz@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org,
        decui@microsoft.com, tglx@linutronix.de, mingo@redhat.com,
        bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org,
        hpa@zytor.com, arnd@arndb.de, peterz@infradead.org,
        jpoimboe@kernel.org, seanjc@google.com,
        kirill.shutemov@linux.intel.com, ak@linux.intel.com,
        sathyanarayanan.kuppuswamy@linux.intel.com,
        linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arch@vger.kernel.org
Subject: Re: [PATCH v2 4/5] hv: Enable vmbus driver for nested root partition
Message-ID: <Y2Nnbs7o7aRd/E07@anrayabh-desk>
References: <cover.1667406350.git.jinankjain@linux.microsoft.com>
 <b5ea40f7e84e17a4338a313ab74292a293b1efa4.1667406350.git.jinankjain@linux.microsoft.com>
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On Wed, Nov 02, 2022 at 04:36:01PM +0000, Jinank Jain wrote:
> 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.

Perhaps more importantly, this is required so that L2 _root_ can use the
VMBus devices.

> 
> Signed-off-by: Jinank Jain <jinankjain@linux.microsoft.com>
> ---
>  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)
>  		return 0;
>  
>  	/*
> -- 
> 2.25.1