Re: [PATCH] x86/mm/cpa: Generalize __set_memory_enc_pgtable()

[Kirill A. Shutemov]

On Wed, Feb 23, 2022 at 12:31:56PM +0100, Borislav Petkov wrote:
> @@ -2024,11 +2026,9 @@ static int __set_memory_enc_pgtable(unsigned long addr, int numpages, bool enc)
>  	 */
>  	cpa_flush(&cpa, 0);
>  
> -	/*
> -	 * Notify hypervisor that a given memory range is mapped encrypted
> -	 * or decrypted.
> -	 */
> -	notify_range_enc_status_changed(addr, numpages, enc);
> +	/* Notify hypervisor that we have successfully set/clr encryption attribute. */
> +	if (!ret)
> +		x86_platform.guest.enc_status_change_finish(addr, numpages, enc);
>  
>  	return ret;
>  }

This operation can fail for TDX. We need to be able to return error code
here:
	/* Notify hypervisor that we have successfully set/clr encryption attribute. */
	if (!ret)
		ret = x86_platform.guest.enc_status_change_finish(addr, numpages, enc);

-- 
 Kirill A. Shutemov