Map the PTE protection key bits to the HPTE key protection bits,
while creating HPTE entries.
Signed-off-by: Ram Pai <linuxram@xxxxxxxxxx>
---
Makefile | 2 +-
arch/powerpc/include/asm/book3s/64/mmu-hash.h | 5 +++++
arch/powerpc/include/asm/pkeys.h | 9 +++++++++
arch/powerpc/mm/hash_utils_64.c | 4 ++++
4 files changed, 19 insertions(+), 1 deletion(-)
diff --git a/Makefile b/Makefile
index 470bd4d..141ea4e 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
VERSION = 4
PATCHLEVEL = 12
SUBLEVEL = 0
-EXTRAVERSION = -rc3
+EXTRAVERSION = -rc3-64k
NAME = Fearless Coyote
# *DOCUMENTATION*
diff --git a/arch/powerpc/include/asm/book3s/64/mmu-hash.h b/arch/powerpc/include/asm/book3s/64/mmu-hash.h
index aa3c299..721a4c3 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 41bf5d4..ef1c601 100644
--- a/arch/powerpc/include/asm/pkeys.h
+++ b/arch/powerpc/include/asm/pkeys.h
@@ -23,6 +23,15 @@ static inline unsigned long pkey_to_vmflag_bits(int pkey)
((pkey & 0x10UL) ? VM_PKEY_BIT4 : 0x0UL));
}
+static inline unsigned long pkey_to_hpte_pkey_bits(int pkey)
+{
+ return (((pkey & 0x10) ? HPTE_R_KEY_BIT0 : 0x0UL) |
+ ((pkey & 0x8) ? HPTE_R_KEY_BIT1 : 0x0UL) |
+ ((pkey & 0x4) ? HPTE_R_KEY_BIT2 : 0x0UL) |
+ ((pkey & 0x2) ? HPTE_R_KEY_BIT3 : 0x0UL) |
+ ((pkey & 0x1) ? 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 2254ff0..7e67dea 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -231,6 +231,10 @@ unsigned long htab_convert_pte_flags(unsigned long pteflags, int pkey)
*/
rflags |= HPTE_R_M;
+#ifdef CONFIG_PPC64_MEMORY_PROTECTION_KEYS
+ rflags |= pkey_to_hpte_pkey_bits(pkey);
+#endif
+
return rflags;
}
--
1.8.3.1
--
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