diff options
Diffstat (limited to 'arch/powerpc/include/asm/mman.h')
| -rw-r--r-- | arch/powerpc/include/asm/mman.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/mman.h b/arch/powerpc/include/asm/mman.h new file mode 100644 index 0000000000..17a77d47ed --- /dev/null +++ b/arch/powerpc/include/asm/mman.h @@ -0,0 +1,44 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + */ +#ifndef _ASM_POWERPC_MMAN_H +#define _ASM_POWERPC_MMAN_H + +#include <uapi/asm/mman.h> + +#ifdef CONFIG_PPC64 + +#include <asm/cputable.h> +#include <linux/mm.h> +#include <linux/pkeys.h> +#include <asm/cpu_has_feature.h> +#include <asm/firmware.h> + +static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot, + unsigned long pkey) +{ +#ifdef CONFIG_PPC_MEM_KEYS + return (((prot & PROT_SAO) ? VM_SAO : 0) | pkey_to_vmflag_bits(pkey)); +#else + return ((prot & PROT_SAO) ? VM_SAO : 0); +#endif +} +#define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey) + +static inline bool arch_validate_prot(unsigned long prot, unsigned long addr) +{ + if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO)) + return false; + if (prot & PROT_SAO) { + if (!cpu_has_feature(CPU_FTR_SAO)) + return false; + if (firmware_has_feature(FW_FEATURE_LPAR) && + !IS_ENABLED(CONFIG_PPC_PROT_SAO_LPAR)) + return false; + } + return true; +} +#define arch_validate_prot arch_validate_prot + +#endif /* CONFIG_PPC64 */ +#endif /* _ASM_POWERPC_MMAN_H */ |