[PATCH v2] arm64: kpti: Use early_param for kpti= command-line option
From: xuwei5@hisilicon.com (Wei Xu)
Date: 2018-06-22 10:47:37
Hi Will, On 2018/6/22 17:25, 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 <redacted>
Thanks! Tested and works on a hisilicon platform. Tested-by: Wei Xu <xuwei5@hisilicon.com> Best Regards, Wei
quoted hunk ↗ jump to hunk
--- v1->v2: Fix typo (remove '=' from option) 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..f24892a40d2c 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); #endif /* CONFIG_UNMAP_KERNEL_AT_EL0 */ #ifdef CONFIG_ARM64_HW_AFDBM