Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_POWERPC_BOOK3S_64_HASH_PKEY_H
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#define _ASM_POWERPC_BOOK3S_64_HASH_PKEY_H
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/* We use key 3 for KERNEL */
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#define HASH_DEFAULT_KERNEL_KEY (HPTE_R_KEY_BIT0 | HPTE_R_KEY_BIT1)
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static inline u64 hash__vmflag_to_pte_pkey_bits(u64 vm_flags)
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{
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return (((vm_flags & VM_PKEY_BIT0) ? H_PTE_PKEY_BIT0 : 0x0UL) |
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((vm_flags & VM_PKEY_BIT1) ? H_PTE_PKEY_BIT1 : 0x0UL) |
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((vm_flags & VM_PKEY_BIT2) ? H_PTE_PKEY_BIT2 : 0x0UL) |
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((vm_flags & VM_PKEY_BIT3) ? H_PTE_PKEY_BIT3 : 0x0UL) |
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((vm_flags & VM_PKEY_BIT4) ? H_PTE_PKEY_BIT4 : 0x0UL));
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}
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static inline u64 pte_to_hpte_pkey_bits(u64 pteflags, unsigned long flags)
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{
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unsigned long pte_pkey;
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pte_pkey = (((pteflags & H_PTE_PKEY_BIT4) ? HPTE_R_KEY_BIT4 : 0x0UL) |
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((pteflags & H_PTE_PKEY_BIT3) ? HPTE_R_KEY_BIT3 : 0x0UL) |
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((pteflags & H_PTE_PKEY_BIT2) ? HPTE_R_KEY_BIT2 : 0x0UL) |
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((pteflags & H_PTE_PKEY_BIT1) ? HPTE_R_KEY_BIT1 : 0x0UL) |
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((pteflags & H_PTE_PKEY_BIT0) ? HPTE_R_KEY_BIT0 : 0x0UL));
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if (mmu_has_feature(MMU_FTR_KUAP) ||
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mmu_has_feature(MMU_FTR_BOOK3S_KUEP)) {
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if ((pte_pkey == 0) && (flags & HPTE_USE_KERNEL_KEY))
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return HASH_DEFAULT_KERNEL_KEY;
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}
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return pte_pkey;
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}
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static inline u16 hash__pte_to_pkey_bits(u64 pteflags)
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{
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return (((pteflags & H_PTE_PKEY_BIT4) ? 0x10 : 0x0UL) |
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((pteflags & H_PTE_PKEY_BIT3) ? 0x8 : 0x0UL) |
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((pteflags & H_PTE_PKEY_BIT2) ? 0x4 : 0x0UL) |
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((pteflags & H_PTE_PKEY_BIT1) ? 0x2 : 0x0UL) |
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((pteflags & H_PTE_PKEY_BIT0) ? 0x1 : 0x0UL));
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}
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#endif
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