From 2e8735198af0392d9032a356ee6c82686afca779 Mon Sep 17 00:00:00 2001 From: "Aneesh Kumar K.V" Date: Fri, 29 Apr 2016 23:25:47 +1000 Subject: [PATCH] powerpc/mm: Move common pte bits and accessors to book3s/64/pgtable.h Now that we have moved book3s hash64 Linux pte bits to match Power ISA 3.0 radix pte bit positions, we move the matching pte bits to a common header. Only code movement in this patch. No functionality change. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman --- arch/powerpc/include/asm/book3s/64/hash.h | 136 ------------------------- arch/powerpc/include/asm/book3s/64/pgtable.h | 143 ++++++++++++++++++++++++++- 2 files changed, 141 insertions(+), 138 deletions(-) diff --git a/arch/powerpc/include/asm/book3s/64/hash.h b/arch/powerpc/include/asm/book3s/64/hash.h index 451617e437a2..19f9e6ea46f4 100644 --- a/arch/powerpc/include/asm/book3s/64/hash.h +++ b/arch/powerpc/include/asm/book3s/64/hash.h @@ -13,54 +13,12 @@ * We could create separate kernel read-only if we used the 3 PP bits * combinations that newer processors provide but we currently don't. */ -#define _PAGE_BIT_SWAP_TYPE 0 - -#define _PAGE_EXEC 0x00001 /* execute permission */ -#define _PAGE_WRITE 0x00002 /* write access allowed */ -#define _PAGE_READ 0x00004 /* read access allowed */ -#define _PAGE_RW (_PAGE_READ | _PAGE_WRITE) -#define _PAGE_RWX (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC) -#define _PAGE_PRIVILEGED 0x00008 /* kernel access only */ -#define _PAGE_SAO 0x00010 /* Strong access order */ -#define _PAGE_NON_IDEMPOTENT 0x00020 /* non idempotent memory */ -#define _PAGE_TOLERANT 0x00030 /* tolerant memory, cache inhibited */ -#define _PAGE_DIRTY 0x00080 /* C: page changed */ -#define _PAGE_ACCESSED 0x00100 /* R: page referenced */ -/* - * Software bits - */ -#ifdef CONFIG_MEM_SOFT_DIRTY -#define _PAGE_SOFT_DIRTY 0x00200 /* software: software dirty tracking */ -#else -#define _PAGE_SOFT_DIRTY 0x00000 -#endif -#define _PAGE_SPECIAL 0x00400 /* software: special page */ #define H_PAGE_BUSY 0x00800 /* software: PTE & hash are busy */ #define H_PTE_NONE_MASK _PAGE_HPTEFLAGS #define H_PAGE_F_GIX_SHIFT 57 #define H_PAGE_F_GIX (7ul << 57) /* HPTE index within HPTEG */ #define H_PAGE_F_SECOND (1ul << 60) /* HPTE is in 2ndary HPTEG */ #define H_PAGE_HASHPTE (1ul << 61) /* PTE has associated HPTE */ -#define _PAGE_PTE (1ul << 62) /* distinguishes PTEs from pointers */ -#define _PAGE_PRESENT (1ul << 63) /* pte contains a translation */ -/* - * Drivers request for cache inhibited pte mapping using _PAGE_NO_CACHE - * Instead of fixing all of them, add an alternate define which - * maps CI pte mapping. - */ -#define _PAGE_NO_CACHE _PAGE_TOLERANT -/* - * We support 57 bit real address in pte. Clear everything above 57, and - * every thing below PAGE_SHIFT; - */ -#define PTE_RPN_MASK (((1UL << 57) - 1) & (PAGE_MASK)) -/* - * set of bits not changed in pmd_modify. - */ -#define _HPAGE_CHG_MASK (PTE_RPN_MASK | _PAGE_HPTEFLAGS | _PAGE_DIRTY | \ - _PAGE_ACCESSED | H_PAGE_THP_HUGE | _PAGE_PTE | \ - _PAGE_SOFT_DIRTY) - #ifdef CONFIG_PPC_64K_PAGES #include @@ -118,105 +76,11 @@ #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN #endif /* CONFIG_PPC_MM_SLICES */ -/* - * user access blocked by key - */ -#define _PAGE_KERNEL_RW (_PAGE_PRIVILEGED | _PAGE_RW | _PAGE_DIRTY) -#define _PAGE_KERNEL_RO (_PAGE_PRIVILEGED | _PAGE_READ) -#define _PAGE_KERNEL_RWX (_PAGE_PRIVILEGED | _PAGE_DIRTY | \ - _PAGE_RW | _PAGE_EXEC) - -/* No page size encoding in the linux PTE */ -#define _PAGE_PSIZE 0 /* PTEIDX nibble */ #define _PTEIDX_SECONDARY 0x8 #define _PTEIDX_GROUP_IX 0x7 -/* - * _PAGE_CHG_MASK masks of bits that are to be preserved across - * pgprot changes - */ -#define _PAGE_CHG_MASK (PTE_RPN_MASK | _PAGE_HPTEFLAGS | _PAGE_DIRTY | \ - _PAGE_ACCESSED | _PAGE_SPECIAL | _PAGE_PTE | \ - _PAGE_SOFT_DIRTY) -/* - * Mask of bits returned by pte_pgprot() - */ -#define PAGE_PROT_BITS (_PAGE_SAO | _PAGE_NON_IDEMPOTENT | _PAGE_TOLERANT | \ - H_PAGE_4K_PFN | _PAGE_PRIVILEGED | _PAGE_ACCESSED | \ - _PAGE_READ | _PAGE_WRITE | _PAGE_DIRTY | _PAGE_EXEC | \ - _PAGE_SOFT_DIRTY) -/* - * We define 2 sets of base prot bits, one for basic pages (ie, - * cacheable kernel and user pages) and one for non cacheable - * pages. We always set _PAGE_COHERENT when SMP is enabled or - * the processor might need it for DMA coherency. - */ -#define _PAGE_BASE_NC (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_PSIZE) -#define _PAGE_BASE (_PAGE_BASE_NC) - -/* Permission masks used to generate the __P and __S table, - * - * Note:__pgprot is defined in arch/powerpc/include/asm/page.h - * - * Write permissions imply read permissions for now (we could make write-only - * pages on BookE but we don't bother for now). Execute permission control is - * possible on platforms that define _PAGE_EXEC - * - * Note due to the way vm flags are laid out, the bits are XWR - */ -#define PAGE_NONE __pgprot(_PAGE_BASE | _PAGE_PRIVILEGED) -#define PAGE_SHARED __pgprot(_PAGE_BASE | _PAGE_RW) -#define PAGE_SHARED_X __pgprot(_PAGE_BASE | _PAGE_RW | _PAGE_EXEC) -#define PAGE_COPY __pgprot(_PAGE_BASE | _PAGE_READ) -#define PAGE_COPY_X __pgprot(_PAGE_BASE | _PAGE_READ | _PAGE_EXEC) -#define PAGE_READONLY __pgprot(_PAGE_BASE | _PAGE_READ) -#define PAGE_READONLY_X __pgprot(_PAGE_BASE | _PAGE_READ | _PAGE_EXEC) - -#define __P000 PAGE_NONE -#define __P001 PAGE_READONLY -#define __P010 PAGE_COPY -#define __P011 PAGE_COPY -#define __P100 PAGE_READONLY_X -#define __P101 PAGE_READONLY_X -#define __P110 PAGE_COPY_X -#define __P111 PAGE_COPY_X - -#define __S000 PAGE_NONE -#define __S001 PAGE_READONLY -#define __S010 PAGE_SHARED -#define __S011 PAGE_SHARED -#define __S100 PAGE_READONLY_X -#define __S101 PAGE_READONLY_X -#define __S110 PAGE_SHARED_X -#define __S111 PAGE_SHARED_X - -/* Permission masks used for kernel mappings */ -#define PAGE_KERNEL __pgprot(_PAGE_BASE | _PAGE_KERNEL_RW) -#define PAGE_KERNEL_NC __pgprot(_PAGE_BASE_NC | _PAGE_KERNEL_RW | \ - _PAGE_TOLERANT) -#define PAGE_KERNEL_NCG __pgprot(_PAGE_BASE_NC | _PAGE_KERNEL_RW | \ - _PAGE_NON_IDEMPOTENT) -#define PAGE_KERNEL_X __pgprot(_PAGE_BASE | _PAGE_KERNEL_RWX) -#define PAGE_KERNEL_RO __pgprot(_PAGE_BASE | _PAGE_KERNEL_RO) -#define PAGE_KERNEL_ROX __pgprot(_PAGE_BASE | _PAGE_KERNEL_ROX) - -/* Protection used for kernel text. We want the debuggers to be able to - * set breakpoints anywhere, so don't write protect the kernel text - * on platforms where such control is possible. - */ -#if defined(CONFIG_KGDB) || defined(CONFIG_XMON) || defined(CONFIG_BDI_SWITCH) ||\ - defined(CONFIG_KPROBES) || defined(CONFIG_DYNAMIC_FTRACE) -#define PAGE_KERNEL_TEXT PAGE_KERNEL_X -#else -#define PAGE_KERNEL_TEXT PAGE_KERNEL_ROX -#endif - -/* Make modules code happy. We don't set RO yet */ -#define PAGE_KERNEL_EXEC PAGE_KERNEL_X -#define PAGE_AGP (PAGE_KERNEL_NC) - #define PMD_BAD_BITS (PTE_TABLE_SIZE-1) #define PUD_BAD_BITS (PMD_TABLE_SIZE-1) diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h index 65eb819609b1..47e2e7750eae 100644 --- a/arch/powerpc/include/asm/book3s/64/pgtable.h +++ b/arch/powerpc/include/asm/book3s/64/pgtable.h @@ -1,9 +1,148 @@ #ifndef _ASM_POWERPC_BOOK3S_64_PGTABLE_H_ #define _ASM_POWERPC_BOOK3S_64_PGTABLE_H_ + +/* + * Common bits between hash and Radix page table + */ +#define _PAGE_BIT_SWAP_TYPE 0 + +#define _PAGE_EXEC 0x00001 /* execute permission */ +#define _PAGE_WRITE 0x00002 /* write access allowed */ +#define _PAGE_READ 0x00004 /* read access allowed */ +#define _PAGE_RW (_PAGE_READ | _PAGE_WRITE) +#define _PAGE_RWX (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC) +#define _PAGE_PRIVILEGED 0x00008 /* kernel access only */ +#define _PAGE_SAO 0x00010 /* Strong access order */ +#define _PAGE_NON_IDEMPOTENT 0x00020 /* non idempotent memory */ +#define _PAGE_TOLERANT 0x00030 /* tolerant memory, cache inhibited */ +#define _PAGE_DIRTY 0x00080 /* C: page changed */ +#define _PAGE_ACCESSED 0x00100 /* R: page referenced */ +/* + * Software bits + */ +#ifdef CONFIG_MEM_SOFT_DIRTY +#define _PAGE_SOFT_DIRTY 0x00200 /* software: software dirty tracking */ +#else +#define _PAGE_SOFT_DIRTY 0x00000 +#endif +#define _PAGE_SPECIAL 0x00400 /* software: special page */ + + +#define _PAGE_PTE (1ul << 62) /* distinguishes PTEs from pointers */ +#define _PAGE_PRESENT (1ul << 63) /* pte contains a translation */ +/* + * Drivers request for cache inhibited pte mapping using _PAGE_NO_CACHE + * Instead of fixing all of them, add an alternate define which + * maps CI pte mapping. + */ +#define _PAGE_NO_CACHE _PAGE_TOLERANT +/* + * We support 57 bit real address in pte. Clear everything above 57, and + * every thing below PAGE_SHIFT; + */ +#define PTE_RPN_MASK (((1UL << 57) - 1) & (PAGE_MASK)) +/* + * set of bits not changed in pmd_modify. Even though we have hash specific bits + * in here, on radix we expect them to be zero. + */ +#define _HPAGE_CHG_MASK (PTE_RPN_MASK | _PAGE_HPTEFLAGS | _PAGE_DIRTY | \ + _PAGE_ACCESSED | H_PAGE_THP_HUGE | _PAGE_PTE | \ + _PAGE_SOFT_DIRTY) +/* + * user access blocked by key + */ +#define _PAGE_KERNEL_RW (_PAGE_PRIVILEGED | _PAGE_RW | _PAGE_DIRTY) +#define _PAGE_KERNEL_RO (_PAGE_PRIVILEGED | _PAGE_READ) +#define _PAGE_KERNEL_RWX (_PAGE_PRIVILEGED | _PAGE_DIRTY | \ + _PAGE_RW | _PAGE_EXEC) /* - * This file contains the functions and defines necessary to modify and use - * the ppc64 hashed page table. + * No page size encoding in the linux PTE */ +#define _PAGE_PSIZE 0 +/* + * _PAGE_CHG_MASK masks of bits that are to be preserved across + * pgprot changes + */ +#define _PAGE_CHG_MASK (PTE_RPN_MASK | _PAGE_HPTEFLAGS | _PAGE_DIRTY | \ + _PAGE_ACCESSED | _PAGE_SPECIAL | _PAGE_PTE | \ + _PAGE_SOFT_DIRTY) +/* + * Mask of bits returned by pte_pgprot() + */ +#define PAGE_PROT_BITS (_PAGE_SAO | _PAGE_NON_IDEMPOTENT | _PAGE_TOLERANT | \ + H_PAGE_4K_PFN | _PAGE_PRIVILEGED | _PAGE_ACCESSED | \ + _PAGE_READ | _PAGE_WRITE | _PAGE_DIRTY | _PAGE_EXEC | \ + _PAGE_SOFT_DIRTY) +/* + * We define 2 sets of base prot bits, one for basic pages (ie, + * cacheable kernel and user pages) and one for non cacheable + * pages. We always set _PAGE_COHERENT when SMP is enabled or + * the processor might need it for DMA coherency. + */ +#define _PAGE_BASE_NC (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_PSIZE) +#define _PAGE_BASE (_PAGE_BASE_NC) + +/* Permission masks used to generate the __P and __S table, + * + * Note:__pgprot is defined in arch/powerpc/include/asm/page.h + * + * Write permissions imply read permissions for now (we could make write-only + * pages on BookE but we don't bother for now). Execute permission control is + * possible on platforms that define _PAGE_EXEC + * + * Note due to the way vm flags are laid out, the bits are XWR + */ +#define PAGE_NONE __pgprot(_PAGE_BASE | _PAGE_PRIVILEGED) +#define PAGE_SHARED __pgprot(_PAGE_BASE | _PAGE_RW) +#define PAGE_SHARED_X __pgprot(_PAGE_BASE | _PAGE_RW | _PAGE_EXEC) +#define PAGE_COPY __pgprot(_PAGE_BASE | _PAGE_READ) +#define PAGE_COPY_X __pgprot(_PAGE_BASE | _PAGE_READ | _PAGE_EXEC) +#define PAGE_READONLY __pgprot(_PAGE_BASE | _PAGE_READ) +#define PAGE_READONLY_X __pgprot(_PAGE_BASE | _PAGE_READ | _PAGE_EXEC) + +#define __P000 PAGE_NONE +#define __P001 PAGE_READONLY +#define __P010 PAGE_COPY +#define __P011 PAGE_COPY +#define __P100 PAGE_READONLY_X +#define __P101 PAGE_READONLY_X +#define __P110 PAGE_COPY_X +#define __P111 PAGE_COPY_X + +#define __S000 PAGE_NONE +#define __S001 PAGE_READONLY +#define __S010 PAGE_SHARED +#define __S011 PAGE_SHARED +#define __S100 PAGE_READONLY_X +#define __S101 PAGE_READONLY_X +#define __S110 PAGE_SHARED_X +#define __S111 PAGE_SHARED_X + +/* Permission masks used for kernel mappings */ +#define PAGE_KERNEL __pgprot(_PAGE_BASE | _PAGE_KERNEL_RW) +#define PAGE_KERNEL_NC __pgprot(_PAGE_BASE_NC | _PAGE_KERNEL_RW | \ + _PAGE_TOLERANT) +#define PAGE_KERNEL_NCG __pgprot(_PAGE_BASE_NC | _PAGE_KERNEL_RW | \ + _PAGE_NON_IDEMPOTENT) +#define PAGE_KERNEL_X __pgprot(_PAGE_BASE | _PAGE_KERNEL_RWX) +#define PAGE_KERNEL_RO __pgprot(_PAGE_BASE | _PAGE_KERNEL_RO) +#define PAGE_KERNEL_ROX __pgprot(_PAGE_BASE | _PAGE_KERNEL_ROX) + +/* + * Protection used for kernel text. We want the debuggers to be able to + * set breakpoints anywhere, so don't write protect the kernel text + * on platforms where such control is possible. + */ +#if defined(CONFIG_KGDB) || defined(CONFIG_XMON) || defined(CONFIG_BDI_SWITCH) || \ + defined(CONFIG_KPROBES) || defined(CONFIG_DYNAMIC_FTRACE) +#define PAGE_KERNEL_TEXT PAGE_KERNEL_X +#else +#define PAGE_KERNEL_TEXT PAGE_KERNEL_ROX +#endif + +/* Make modules code happy. We don't set RO yet */ +#define PAGE_KERNEL_EXEC PAGE_KERNEL_X +#define PAGE_AGP (PAGE_KERNEL_NC) #include #include -- 2.11.0