linux-kernel - RE: [PATCH hyperv-next v5 05/11] arm64: hyperv: Initialize the Virtual Trust Level field

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Date: Mon, 10 Mar 2025 23:07:09 +0000
From: Michael Kelley <mhklinux@...look.com>
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Subject: RE: [PATCH hyperv-next v5 05/11] arm64: hyperv: Initialize the
 Virtual Trust Level field

From: Roman Kisel <romank@...ux.microsoft.com> Sent: Friday, March 7, 2025 2:03 PM
> 
> Various parts of the hyperv code need to know what VTL
> the kernel runs at, most notably VMBus needs that to
> establish communication with the host.
> 
> Initialize the Virtual Trust Level field to enable
> booting in the Virtual Trust Level.
> 
> Signed-off-by: Roman Kisel <romank@...ux.microsoft.com>
> ---
>  arch/arm64/hyperv/mshyperv.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/hyperv/mshyperv.c b/arch/arm64/hyperv/mshyperv.c
> index c647db56fd6b..a7db03f5413d 100644
> --- a/arch/arm64/hyperv/mshyperv.c
> +++ b/arch/arm64/hyperv/mshyperv.c
> @@ -107,6 +107,7 @@ static int __init hyperv_init(void)
> 
>  	if (ms_hyperv.priv_high & HV_ACCESS_PARTITION_ID)
>  		hv_get_partition_id();
> +	ms_hyperv.vtl = get_vtl();
> 
>  	ms_hyperv_late_init();
> 
> --
> 2.43.0
> 

Reviewed-by: Michael Kelley <mhklinux@...look.com>