From a2a83eb40fbdeee3ed9c6fcc7bb015a2dd1a3e93 Mon Sep 17 00:00:00 2001 From: Pavankumar Kondeti Date: Wed, 12 Apr 2023 10:02:58 +0530 Subject: [PATCH] arm64: kernel: Fix kernel warning when nokaslr is passed to commandline 'Unknown kernel command line parameters "nokaslr", will be passed to user space' message is noticed in the dmesg when nokaslr is passed to the kernel commandline on ARM64 platform. This is because nokaslr param is handled by early cpufeature detection infrastructure and the parameter is never consumed by a kernel param handler. Fix this warning by providing a dummy kernel param handler for nokaslr. Signed-off-by: Pavankumar Kondeti Link: https://lore.kernel.org/r/20230412043258.397455-1-quic_pkondeti@quicinc.com Signed-off-by: Will Deacon --- arch/arm64/kernel/idreg-override.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/arm64/kernel/idreg-override.c b/arch/arm64/kernel/idreg-override.c index d833d78a7f313..964ba6efc7a07 100644 --- a/arch/arm64/kernel/idreg-override.c +++ b/arch/arm64/kernel/idreg-override.c @@ -178,6 +178,13 @@ static const struct { { "nokaslr", "kaslr.disabled=1" }, }; +static int __init parse_nokaslr(char *unused) +{ + /* nokaslr param handling is done by early cpufeature code */ + return 0; +} +early_param("nokaslr", parse_nokaslr); + static int __init find_field(const char *cmdline, const struct ftr_set_desc *reg, int f, u64 *v) { -- 2.30.2