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Groups > linux.kernel > #1668169
| From | Ram Pai <linuxram@us.ibm.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [RFC v2 06/12] powerpc: Program HPTE key protection bits. |
| Date | 2017-06-17 06:00 +0200 |
| Message-ID | <tTd3Y-1kp-23@gated-at.bofh.it> (permalink) |
| References | <tTd3X-1kp-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Map the PTE protection key bits to the HPTE key protection bits, while creatiing HPTE entries. Signed-off-by: Ram Pai <linuxram@us.ibm.com> --- arch/powerpc/include/asm/book3s/64/mmu-hash.h | 5 +++++ arch/powerpc/include/asm/pkeys.h | 7 +++++++ arch/powerpc/mm/hash_utils_64.c | 5 +++++ 3 files changed, 17 insertions(+) diff --git a/arch/powerpc/include/asm/book3s/64/mmu-hash.h b/arch/powerpc/include/asm/book3s/64/mmu-hash.h index cfb8169..3d7872c 100644 --- a/arch/powerpc/include/asm/book3s/64/mmu-hash.h +++ b/arch/powerpc/include/asm/book3s/64/mmu-hash.h @@ -90,6 +90,8 @@ #define HPTE_R_PP0 ASM_CONST(0x8000000000000000) #define HPTE_R_TS ASM_CONST(0x4000000000000000) #define HPTE_R_KEY_HI ASM_CONST(0x3000000000000000) +#define HPTE_R_KEY_BIT0 ASM_CONST(0x2000000000000000) +#define HPTE_R_KEY_BIT1 ASM_CONST(0x1000000000000000) #define HPTE_R_RPN_SHIFT 12 #define HPTE_R_RPN ASM_CONST(0x0ffffffffffff000) #define HPTE_R_RPN_3_0 ASM_CONST(0x01fffffffffff000) @@ -104,6 +106,9 @@ #define HPTE_R_C ASM_CONST(0x0000000000000080) #define HPTE_R_R ASM_CONST(0x0000000000000100) #define HPTE_R_KEY_LO ASM_CONST(0x0000000000000e00) +#define HPTE_R_KEY_BIT2 ASM_CONST(0x0000000000000800) +#define HPTE_R_KEY_BIT3 ASM_CONST(0x0000000000000400) +#define HPTE_R_KEY_BIT4 ASM_CONST(0x0000000000000200) #define HPTE_V_1TB_SEG ASM_CONST(0x4000000000000000) #define HPTE_V_VRMA_MASK ASM_CONST(0x4001ffffff000000) diff --git a/arch/powerpc/include/asm/pkeys.h b/arch/powerpc/include/asm/pkeys.h index 0f3dca8..9b6820d 100644 --- a/arch/powerpc/include/asm/pkeys.h +++ b/arch/powerpc/include/asm/pkeys.h @@ -27,6 +27,13 @@ ((vm_flags & VM_PKEY_BIT3) ? H_PAGE_PKEY_BIT1 : 0x0UL) | \ ((vm_flags & VM_PKEY_BIT4) ? H_PAGE_PKEY_BIT0 : 0x0UL)) +#define calc_pte_to_hpte_pkey_bits(pteflags) \ + (((pteflags & H_PAGE_PKEY_BIT0) ? HPTE_R_KEY_BIT0 : 0x0UL) | \ + ((pteflags & H_PAGE_PKEY_BIT1) ? HPTE_R_KEY_BIT1 : 0x0UL) | \ + ((pteflags & H_PAGE_PKEY_BIT2) ? HPTE_R_KEY_BIT2 : 0x0UL) | \ + ((pteflags & H_PAGE_PKEY_BIT3) ? HPTE_R_KEY_BIT3 : 0x0UL) | \ + ((pteflags & H_PAGE_PKEY_BIT4) ? HPTE_R_KEY_BIT4 : 0x0UL)) + /* * Bits are in BE format. * NOTE: key 31, 1, 0 are not used. diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c index c0f4b46..7d974cd 100644 --- a/arch/powerpc/mm/hash_utils_64.c +++ b/arch/powerpc/mm/hash_utils_64.c @@ -35,6 +35,7 @@ #include <linux/memblock.h> #include <linux/context_tracking.h> #include <linux/libfdt.h> +#include <linux/pkeys.h> #include <asm/debugfs.h> #include <asm/processor.h> @@ -230,6 +231,10 @@ unsigned long htab_convert_pte_flags(unsigned long pteflags) */ rflags |= HPTE_R_M; +#ifdef CONFIG_PPC64_MEMORY_PROTECTION_KEYS + rflags |= calc_pte_to_hpte_pkey_bits(pteflags); +#endif + return rflags; } -- 1.8.3.1
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[RFC v2 00/12] powerpc: Memory Protection Keys Ram Pai <linuxram@us.ibm.com> - 2017-06-17 06:00 +0200
[RFC v2 09/12] powerpc: Deliver SEGV signal on pkey violation. Ram Pai <linuxram@us.ibm.com> - 2017-06-17 06:00 +0200
[RFC v2 07/12] powerpc: Macro the mask used for checking DSI exception Ram Pai <linuxram@us.ibm.com> - 2017-06-17 06:00 +0200
[RFC v2 04/12] powerpc: store and restore the pkey state across context switches. Ram Pai <linuxram@us.ibm.com> - 2017-06-17 06:00 +0200
[RFC v2 05/12] powerpc: Implementation for sys_mprotect_pkey() system call. Ram Pai <linuxram@us.ibm.com> - 2017-06-17 06:00 +0200
[RFC v2 11/12]Documentation: Documentation updates. Ram Pai <linuxram@us.ibm.com> - 2017-06-17 06:00 +0200
[RFC v2 01/12] powerpc: Free up four 64K PTE bits in 4K backed hpte pages. Ram Pai <linuxram@us.ibm.com> - 2017-06-17 06:00 +0200
[RFC v2 10/12] powerpc: Read AMR only if pkey-violation caused the exception. Ram Pai <linuxram@us.ibm.com> - 2017-06-17 06:00 +0200
Re: [RFC v2 10/12] powerpc: Read AMR only if pkey-violation caused the exception. Michael Ellerman <mpe@ellerman.id.au> - 2017-06-19 13:10 +0200
Re: [RFC v2 10/12] powerpc: Read AMR only if pkey-violation caused the exception. Ram Pai <linuxram@us.ibm.com> - 2017-06-19 20:00 +0200
[RFC v2 03/12] powerpc: Implement sys_pkey_alloc and sys_pkey_free system call. Ram Pai <linuxram@us.ibm.com> - 2017-06-17 06:00 +0200
Re: [RFC v2 03/12] powerpc: Implement sys_pkey_alloc and sys_pkey_free system call. Michael Ellerman <mpe@ellerman.id.au> - 2017-06-19 14:20 +0200
[RFC v2 06/12] powerpc: Program HPTE key protection bits. Ram Pai <linuxram@us.ibm.com> - 2017-06-17 06:00 +0200
[RFC v2 02/12] powerpc: Free up four 64K PTE bits in 64K backed hpte pages. Ram Pai <linuxram@us.ibm.com> - 2017-06-17 06:00 +0200
Re: [RFC v2 12/12]selftest: Updated protection key selftest Michael Ellerman <mpe@ellerman.id.au> - 2017-06-19 13:10 +0200
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