RE: [PATCH] x86/hyperv/vtl: Add noop for realmode pointers

[Michael Kelley (LINUX)]

From: Saurabh Sengar <ssengar@xxxxxxxxxxxxxxxxxxx> Sent: Monday, April 24, 2023 3:10 AM
> 
> Assign the realmode pointers to noop, instead of NULL to fix kernel panic.
> 
> Signed-off-by: Saurabh Sengar <ssengar@xxxxxxxxxxxxxxxxxxx>
> ---
>  arch/x86/hyperv/hv_vtl.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/x86/hyperv/hv_vtl.c b/arch/x86/hyperv/hv_vtl.c
> index 1ba5d3b99b16..85d38b9f3586 100644
> --- a/arch/x86/hyperv/hv_vtl.c
> +++ b/arch/x86/hyperv/hv_vtl.c
> @@ -20,6 +20,8 @@ void __init hv_vtl_init_platform(void)
>  {
>  	pr_info("Linux runs in Hyper-V Virtual Trust Level\n");
> 
> +	x86_platform.realmode_reserve = x86_init_noop;
> +	x86_platform.realmode_init = x86_init_noop;
>  	x86_init.irqs.pre_vector_init = x86_init_noop;
>  	x86_init.timers.timer_init = x86_init_noop;
> 
> --
> 2.34.1

Reviewed-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>