From mboxrd@z Thu Jan  1 00:00:00 1970
From: xuwei5@hisilicon.com (Wei Xu)
Date: Wed, 20 Jun 2018 16:46:00 +0100
Subject: [PATCH] arm64: kpti: Use early_param for kpti= command-line option
In-Reply-To: <1529508227-24331-1-git-send-email-will.deacon@arm.com>
References: <1529508227-24331-1-git-send-email-will.deacon@arm.com>
Message-ID: <5B2A76B8.5020103@hisilicon.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

Hi Will,

On 2018/6/20 16:23, Will Deacon wrote:
> We inspect __kpti_forced early on as part of the cpufeature enable
> callback which remaps the swapper page table using non-global entries.
> 
> Ensure that __kpti_forced has been updated to reflect the kpti=
> command-line option before we start using it.
> 
> Reported-by: Wei Xu <xuwei5@hisilicon.com>
> Signed-off-by: Will Deacon <will.deacon@arm.com>
> ---
>  arch/arm64/kernel/cpufeature.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
> index d2856b129097..112b071e793f 100644
> --- a/arch/arm64/kernel/cpufeature.c
> +++ b/arch/arm64/kernel/cpufeature.c
> @@ -937,7 +937,7 @@ static int __init parse_kpti(char *str)
>  	__kpti_forced = enabled ? 1 : -1;
>  	return 0;
>  }
> -__setup("kpti=", parse_kpti);
> +early_param("kpti=", parse_kpti);

%s/kpti=/kpti

Thanks!

Best Regards,
Wei

>  #endif	/* CONFIG_UNMAP_KERNEL_AT_EL0 */
>  
>  #ifdef CONFIG_ARM64_HW_AFDBM
>