Re: [PATCH v15 21/23] x86/virt/tdx: Handle TDX interaction with ACPI S3 and deeper states

[Dave Hansen <dave.hansen@intel.com>]

On 11/9/23 03:55, Kai Huang wrote:
>  #include <asm/page.h>
> @@ -1402,6 +1404,15 @@ static int __init tdx_init(void)
>  		return -ENODEV;
>  	}
>  
> +	/*
> +	 * At this point, hibernation_available() indicates whether or
> +	 * not hibernation support has been permanently disabled.
> +	 */
> +	if (hibernation_available()) {
> +		pr_err("initialization failed: Hibernation support is enabled\n");
> +		return -ENODEV;
> +	}
> +
>  	err = register_memory_notifier(&tdx_memory_nb);
>  	if (err) {
>  		pr_err("initialization failed: register_memory_notifier() failed (%d)\n",
> @@ -1417,6 +1428,11 @@ static int __init tdx_init(void)
>  		return -ENODEV;
>  	}
>  
> +#if defined(CONFIG_ACPI) && defined(CONFIG_SUSPEND)
> +	pr_info("Disable ACPI S3. Turn off TDX in the BIOS to use ACPI S3.\n");
> +	acpi_suspend_lowlevel = NULL;
> +#endif

Rafael, are you OK with how this patch ended up?  An ack would be much
appreciated if so.