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powerpc/book3s64/pkeys: pkeys are supported only on hash on book3s.

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Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200709032946.881753-4-aneesh.kumar@linux.ibm.com
This commit is contained in:
Aneesh Kumar K.V 2020-07-09 08:59:26 +05:30 committed by Michael Ellerman
parent 33699023f5
commit b9658f83e7
3 changed files with 64 additions and 30 deletions
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32
arch/powerpc/include/asm/book3s/64/hash-pkey.h Normal file
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@ -0,0 +1,32 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_BOOK3S_64_HASH_PKEY_H
#define _ASM_POWERPC_BOOK3S_64_HASH_PKEY_H
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)
{
return (((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));
}
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

25
arch/powerpc/include/asm/book3s/64/pkeys.h Normal file
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@ -0,0 +1,25 @@
/* SPDX-License-Identifier: GPL-2.0+ */
#ifndef _ASM_POWERPC_BOOK3S_64_PKEYS_H
#define _ASM_POWERPC_BOOK3S_64_PKEYS_H
#include <asm/book3s/64/hash-pkey.h>
static inline u64 vmflag_to_pte_pkey_bits(u64 vm_flags)
{
if (static_branch_likely(&pkey_disabled))
return 0x0UL;
if (radix_enabled())
BUG();
return hash__vmflag_to_pte_pkey_bits(vm_flags);
}
static inline u16 pte_to_pkey_bits(u64 pteflags)
{
if (radix_enabled())
BUG();
return hash__pte_to_pkey_bits(pteflags);
}
#endif /*_ASM_POWERPC_KEYS_H */

37
arch/powerpc/include/asm/pkeys.h
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@ -25,23 +25,18 @@ extern u32 reserved_allocation_mask; /* bits set for reserved keys */
PKEY_DISABLE_WRITE | \
PKEY_DISABLE_EXECUTE)
#ifdef CONFIG_PPC_BOOK3S_64
#include <asm/book3s/64/pkeys.h>
#else
#error "Not supported"
#endif
static inline u64 pkey_to_vmflag_bits(u16 pkey)
{
return (((u64)pkey << VM_PKEY_SHIFT) & ARCH_VM_PKEY_FLAGS);
}
static inline u64 vmflag_to_pte_pkey_bits(u64 vm_flags)
{
if (static_branch_likely(&pkey_disabled))
return 0x0UL;
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 int vma_pkey(struct vm_area_struct *vma)
{
if (static_branch_likely(&pkey_disabled))
@ -51,24 +46,6 @@ static inline int vma_pkey(struct vm_area_struct *vma)
#define arch_max_pkey() pkeys_total
static inline u64 pte_to_hpte_pkey_bits(u64 pteflags)
{
return (((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));
}
static inline u16 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));
}
#define pkey_alloc_mask(pkey) (0x1 << pkey)
#define mm_pkey_allocation_map(mm) (mm->context.pkey_allocation_map)