__  __    __   __  _____      _            _          _____ _          _ _ 
 |  \/  |   \ \ / / |  __ \    (_)          | |        / ____| |        | | |
 | \  / |_ __\ V /  | |__) | __ ___   ____ _| |_ ___  | (___ | |__   ___| | |
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 | |  | | |_ / . \  | |   | |  | |\ V / (_| | ||  __/  ____) | | | |  __/ | |
 |_|  |_|_(_)_/ \_\ |_|   |_|  |_| \_/ \__,_|\__\___| |_____/|_| |_|\___V 2.1
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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_BOOK3S_64_HASH_PKEY_H
#define _ASM_POWERPC_BOOK3S_64_HASH_PKEY_H

/*  We use key 3 for KERNEL */
#define HASH_DEFAULT_KERNEL_KEY (HPTE_R_KEY_BIT0 | HPTE_R_KEY_BIT1)

static inline u64 hash__vmflag_to_pte_pkey_bits(u64 vm_flags)
{
	return (((vm_flags & VM_PKEY_BIT0) ? H_PTE_PKEY_BIT0 : 0x0UL) |
		((vm_flags & VM_PKEY_BIT1) ? H_PTE_PKEY_BIT1 : 0x0UL) |
		((vm_flags & VM_PKEY_BIT2) ? H_PTE_PKEY_BIT2 : 0x0UL) |
		((vm_flags & VM_PKEY_BIT3) ? H_PTE_PKEY_BIT3 : 0x0UL) |
		((vm_flags & VM_PKEY_BIT4) ? H_PTE_PKEY_BIT4 : 0x0UL));
}

static inline u64 pte_to_hpte_pkey_bits(u64 pteflags, unsigned long flags)
{
	unsigned long pte_pkey;

	pte_pkey = (((pteflags & H_PTE_PKEY_BIT4) ? HPTE_R_KEY_BIT4 : 0x0UL) |
		    ((pteflags & H_PTE_PKEY_BIT3) ? HPTE_R_KEY_BIT3 : 0x0UL) |
		    ((pteflags & H_PTE_PKEY_BIT2) ? HPTE_R_KEY_BIT2 : 0x0UL) |
		    ((pteflags & H_PTE_PKEY_BIT1) ? HPTE_R_KEY_BIT1 : 0x0UL) |
		    ((pteflags & H_PTE_PKEY_BIT0) ? HPTE_R_KEY_BIT0 : 0x0UL));

	if (mmu_has_feature(MMU_FTR_KUAP) ||
	    mmu_has_feature(MMU_FTR_BOOK3S_KUEP)) {
		if ((pte_pkey == 0) && (flags & HPTE_USE_KERNEL_KEY))
			return HASH_DEFAULT_KERNEL_KEY;
	}

	return pte_pkey;
}

static inline u16 hash__pte_to_pkey_bits(u64 pteflags)
{
	return (((pteflags & H_PTE_PKEY_BIT4) ? 0x10 : 0x0UL) |
		((pteflags & H_PTE_PKEY_BIT3) ? 0x8 : 0x0UL) |
		((pteflags & H_PTE_PKEY_BIT2) ? 0x4 : 0x0UL) |
		((pteflags & H_PTE_PKEY_BIT1) ? 0x2 : 0x0UL) |
		((pteflags & H_PTE_PKEY_BIT0) ? 0x1 : 0x0UL));
}

#endif

Filemanager

Name Type Size Permission Actions
hash-4k.h File 5.19 KB 0644
hash-64k.h File 10.03 KB 0644
hash-pkey.h File 1.51 KB 0644
hash.h File 8.47 KB 0644
hugetlb.h File 2.75 KB 0644
kexec.h File 653 B 0644
kup.h File 9.9 KB 0644
mmu-hash.h File 28.3 KB 0644
mmu.h File 7.47 KB 0644
pgalloc.h File 4.7 KB 0644
pgtable-64k.h File 496 B 0644
pgtable.h File 40.56 KB 0644
pkeys.h File 512 B 0644
radix-4k.h File 857 B 0644
radix-64k.h File 915 B 0644
radix.h File 11.78 KB 0644
slice.h File 1.22 KB 0644
tlbflush-hash.h File 2.05 KB 0644
tlbflush-radix.h File 3.41 KB 0644
tlbflush.h File 6.24 KB 0644
Filemanager