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45 lines
1.5 KiB
45 lines
1.5 KiB
/* 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_BOOK3S_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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