56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
/* 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>
|
|
|
|
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 pgprot_t arch_vm_get_page_prot(unsigned long vm_flags)
|
|
{
|
|
#ifdef CONFIG_PPC_MEM_KEYS
|
|
return (vm_flags & VM_SAO) ?
|
|
__pgprot(_PAGE_SAO | vmflag_to_pte_pkey_bits(vm_flags)) :
|
|
__pgprot(0 | vmflag_to_pte_pkey_bits(vm_flags));
|
|
#else
|
|
return (vm_flags & VM_SAO) ? __pgprot(_PAGE_SAO) : __pgprot(0);
|
|
#endif
|
|
}
|
|
#define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags)
|
|
|
|
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 */
|