[mirror_ubuntu-focal-kernel.git] / arch / powerpc / include / asm / mman.h

/* 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>

/*
 * This file is included by linux/mman.h, so we can't use cacl_vm_prot_bits()
 * here.  How important is the optimization?
 */
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) && !cpu_has_feature(CPU_FTR_SAO))
		return false;
	return true;
}
#define arch_validate_prot arch_validate_prot

#endif /* CONFIG_PPC64 */
#endif	/* _ASM_POWERPC_MMAN_H */
Commit	Line	Data
2874c5fd	1	/* SPDX-License-Identifier: GPL-2.0-or-later */
1da177e4	2	/*
1da177e4	3	*/
c3617f72 DH	4	#ifndef _ASM_POWERPC_MMAN_H
c3617f72 DH	5	#define _ASM_POWERPC_MMAN_H
1da177e4	6
c3617f72	7	#include <uapi/asm/mman.h>
1da177e4	8
ef3d3246	9	#ifdef CONFIG_PPC64
b3fcaaa8 SR	10
	11	#include <asm/cputable.h>
	12	#include <linux/mm.h>
013a91b3	13	#include <linux/pkeys.h>
b92a226e	14	#include <asm/cpu_has_feature.h>
b3fcaaa8	15
ef3d3246 DK	16	/*
	17	* This file is included by linux/mman.h, so we can't use cacl_vm_prot_bits()
	18	* here. How important is the optimization?
	19	*/
e6bfb709 DH	20	static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot,
e6bfb709 DH	21	unsigned long pkey)
ef3d3246	22	{
013a91b3 RP	23	#ifdef CONFIG_PPC_MEM_KEYS
	24	return (((prot & PROT_SAO) ? VM_SAO : 0) \| pkey_to_vmflag_bits(pkey));
	25	#else
	26	return ((prot & PROT_SAO) ? VM_SAO : 0);
	27	#endif
ef3d3246	28	}
e6bfb709	29	#define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey)
ef3d3246 DK	30
	31	static inline pgprot_t arch_vm_get_page_prot(unsigned long vm_flags)
	32	{
eb95d016 RP	33	#ifdef CONFIG_PPC_MEM_KEYS
	34	return (vm_flags & VM_SAO) ?
	35	__pgprot(_PAGE_SAO \| vmflag_to_pte_pkey_bits(vm_flags)) :
	36	__pgprot(0 \| vmflag_to_pte_pkey_bits(vm_flags));
	37	#else
f5ea64dc	38	return (vm_flags & VM_SAO) ? __pgprot(_PAGE_SAO) : __pgprot(0);
eb95d016	39	#endif
ef3d3246 DK	40	}
	41	#define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags)
	42
9035cf9a	43	static inline bool arch_validate_prot(unsigned long prot, unsigned long addr)
ef3d3246 DK	44	{
ef3d3246 DK	45	if (prot & ~(PROT_READ \| PROT_WRITE \| PROT_EXEC \| PROT_SEM \| PROT_SAO))
949bed2f	46	return false;
ef3d3246	47	if ((prot & PROT_SAO) && !cpu_has_feature(CPU_FTR_SAO))
949bed2f CG	48	return false;
949bed2f CG	49	return true;
ef3d3246	50	}
9035cf9a	51	#define arch_validate_prot arch_validate_prot
ef3d3246 DK	52
ef3d3246 DK	53	#endif /* CONFIG_PPC64 */
a37c8875	54	#endif /* _ASM_POWERPC_MMAN_H */