diff options
Diffstat (limited to 'arch/powerpc/mm/init-common.c')
| -rw-r--r-- | arch/powerpc/mm/init-common.c | 40 |
1 files changed, 34 insertions, 6 deletions
diff --git a/arch/powerpc/mm/init-common.c b/arch/powerpc/mm/init-common.c index 1e6910eb70ed..42ef7a6e6098 100644 --- a/arch/powerpc/mm/init-common.c +++ b/arch/powerpc/mm/init-common.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * PowerPC version * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) @@ -11,12 +12,6 @@ * * Dave Engebretsen <engebret@us.ibm.com> * Rework for PPC64 port. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * */ #undef DEBUG @@ -24,6 +19,39 @@ #include <linux/string.h> #include <asm/pgalloc.h> #include <asm/pgtable.h> +#include <asm/kup.h> + +phys_addr_t memstart_addr __ro_after_init = (phys_addr_t)~0ull; +EXPORT_SYMBOL_GPL(memstart_addr); +phys_addr_t kernstart_addr __ro_after_init; +EXPORT_SYMBOL_GPL(kernstart_addr); +unsigned long kernstart_virt_addr __ro_after_init = KERNELBASE; +EXPORT_SYMBOL_GPL(kernstart_virt_addr); + +static bool disable_kuep = !IS_ENABLED(CONFIG_PPC_KUEP); +static bool disable_kuap = !IS_ENABLED(CONFIG_PPC_KUAP); + +static int __init parse_nosmep(char *p) +{ + disable_kuep = true; + pr_warn("Disabling Kernel Userspace Execution Prevention\n"); + return 0; +} +early_param("nosmep", parse_nosmep); + +static int __init parse_nosmap(char *p) +{ + disable_kuap = true; + pr_warn("Disabling Kernel Userspace Access Protection\n"); + return 0; +} +early_param("nosmap", parse_nosmap); + +void __ref setup_kup(void) +{ + setup_kuep(disable_kuep); + setup_kuap(disable_kuap); +} #define CTOR(shift) static void ctor_##shift(void *addr) \ { \ |
