[V2,06/30] sparc/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT

Message ID	1645425519-9034-7-git-send-email-anshuman.khandual@arm.com (mailing list archive)
State	New
Headers	show Return-Path: <owner-linux-mm@kvack.org> From: Anshuman Khandual <anshuman.khandual@arm.com> To: linux-mm@kvack.org, akpm@linux-foundation.org Cc: linux-kernel@vger.kernel.org, Anshuman Khandual <anshuman.khandual@arm.com>, Christoph Hellwig <hch@infradead.org>, linux-arch@vger.kernel.org, "David S. Miller" <davem@davemloft.net>, Khalid Aziz <khalid.aziz@oracle.com>, sparclinux@vger.kernel.org Subject: [PATCH V2 06/30] sparc/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT Date: Mon, 21 Feb 2022 12:08:15 +0530 Message-Id: <1645425519-9034-7-git-send-email-anshuman.khandual@arm.com> In-Reply-To: <1645425519-9034-1-git-send-email-anshuman.khandual@arm.com> References: <1645425519-9034-1-git-send-email-anshuman.khandual@arm.com> Sender: owner-linux-mm@kvack.org Precedence: bulk
Series	mm/mmap: Drop protection_map[] and platform's __SXXX/__PXXX requirements \| expand [V2,00/30] mm/mmap: Drop protection_map[] and platform's __SXXX/__PXXX requirements [V2,01/30] mm/debug_vm_pgtable: Drop protection_map[] usage [V2,02/30] mm/mmap: Clarify protection_map[] indices [V2,03/30] mm/mmap: Add new config ARCH_HAS_VM_GET_PAGE_PROT [V2,04/30] powerpc/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT [V2,05/30] arm64/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT [V2,06/30] sparc/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT [V2,07/30] mips/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT [V2,08/30] m68k/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT [V2,09/30] arm/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT [V2,10/30] x86/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT [V2,11/30] mm/mmap: Drop protection_map[] [V2,12/30] mm/mmap: Drop arch_filter_pgprot() [V2,13/30] mm/mmap: Drop arch_vm_get_page_pgprot() [V2,14/30] s390/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT [V2,15/30] riscv/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT [V2,16/30] alpha/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT [V2,17/30] sh/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT [V2,18/30] arc/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT [V2,19/30] csky/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT [V2,20/30] extensa/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT [V2,21/30] parisc/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT [V2,22/30] openrisc/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT [V2,23/30] um/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT [V2,24/30] microblaze/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT [V2,25/30] nios2/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT [V2,26/30] hexagon/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT [V2,27/30] nds32/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT [V2,28/30] ia64/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT [V2,29/30] mm/mmap: Drop generic vm_get_page_prot() [V2,30/30] mm/mmap: Drop ARCH_HAS_VM_GET_PAGE_PROT

diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index 1cab1b284f1a..ff29156f2380 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -59,6 +59,7 @@ config SPARC32 select HAVE_UID16 select OLD_SIGACTION select ZONE_DMA + select ARCH_HAS_VM_GET_PAGE_PROT config SPARC64 def_bool 64BIT @@ -84,6 +85,7 @@ config SPARC64 select PERF_USE_VMALLOC select ARCH_HAVE_NMI_SAFE_CMPXCHG select HAVE_C_RECORDMCOUNT + select ARCH_HAS_VM_GET_PAGE_PROT select HAVE_ARCH_AUDITSYSCALL select ARCH_SUPPORTS_ATOMIC_RMW select ARCH_SUPPORTS_DEBUG_PAGEALLOC diff --git a/arch/sparc/include/asm/mman.h b/arch/sparc/include/asm/mman.h index 274217e7ed70..af9c10c83dc5 100644 --- a/arch/sparc/include/asm/mman.h +++ b/arch/sparc/include/asm/mman.h @@ -46,12 +46,6 @@ static inline unsigned long sparc_calc_vm_prot_bits(unsigned long prot) } } -#define arch_vm_get_page_prot(vm_flags) sparc_vm_get_page_prot(vm_flags) -static inline pgprot_t sparc_vm_get_page_prot(unsigned long vm_flags) -{ - return (vm_flags & VM_SPARC_ADI) ? __pgprot(_PAGE_MCD_4V) : __pgprot(0); -} - #define arch_validate_prot(prot, addr) sparc_validate_prot(prot, addr) static inline int sparc_validate_prot(unsigned long prot, unsigned long addr) { diff --git a/arch/sparc/include/asm/pgtable_32.h b/arch/sparc/include/asm/pgtable_32.h index ffccfe3b22ed..060a435f96d6 100644 --- a/arch/sparc/include/asm/pgtable_32.h +++ b/arch/sparc/include/asm/pgtable_32.h @@ -64,25 +64,6 @@ void paging_init(void); extern unsigned long ptr_in_current_pgd; -/* xwr */ -#define __P000 PAGE_NONE -#define __P001 PAGE_READONLY -#define __P010 PAGE_COPY -#define __P011 PAGE_COPY -#define __P100 PAGE_READONLY -#define __P101 PAGE_READONLY -#define __P110 PAGE_COPY -#define __P111 PAGE_COPY - -#define __S000 PAGE_NONE -#define __S001 PAGE_READONLY -#define __S010 PAGE_SHARED -#define __S011 PAGE_SHARED -#define __S100 PAGE_READONLY -#define __S101 PAGE_READONLY -#define __S110 PAGE_SHARED -#define __S111 PAGE_SHARED - /* First physical page can be anywhere, the following is needed so that * va-->pa and vice versa conversions work properly without performance * hit for all __pa()/__va() operations. diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h index 4679e45c8348..a779418ceba9 100644 --- a/arch/sparc/include/asm/pgtable_64.h +++ b/arch/sparc/include/asm/pgtable_64.h @@ -187,25 +187,6 @@ bool kern_addr_valid(unsigned long addr); #define _PAGE_SZHUGE_4U _PAGE_SZ4MB_4U #define _PAGE_SZHUGE_4V _PAGE_SZ4MB_4V -/* These are actually filled in at boot time by sun4{u,v}_pgprot_init() */ -#define __P000 __pgprot(0) -#define __P001 __pgprot(0) -#define __P010 __pgprot(0) -#define __P011 __pgprot(0) -#define __P100 __pgprot(0) -#define __P101 __pgprot(0) -#define __P110 __pgprot(0) -#define __P111 __pgprot(0) - -#define __S000 __pgprot(0) -#define __S001 __pgprot(0) -#define __S010 __pgprot(0) -#define __S011 __pgprot(0) -#define __S100 __pgprot(0) -#define __S101 __pgprot(0) -#define __S110 __pgprot(0) -#define __S111 __pgprot(0) - #ifndef __ASSEMBLY__ pte_t mk_pte_io(unsigned long, pgprot_t, int, unsigned long); diff --git a/arch/sparc/mm/init_32.c b/arch/sparc/mm/init_32.c index 1e9f577f084d..348cbfe08b60 100644 --- a/arch/sparc/mm/init_32.c +++ b/arch/sparc/mm/init_32.c @@ -302,3 +302,38 @@ void sparc_flush_page_to_ram(struct page *page) __flush_page_to_ram(vaddr); } EXPORT_SYMBOL(sparc_flush_page_to_ram); + +pgprot_t vm_get_page_prot(unsigned long vm_flags) +{ + switch (vm_flags & (VM_READ | VM_WRITE | VM_EXEC | VM_SHARED)) { + case VM_NONE: + return PAGE_NONE; + case VM_READ: + return PAGE_READONLY; + case VM_WRITE: + case VM_WRITE | VM_READ: + return PAGE_COPY; + case VM_EXEC: + case VM_EXEC | VM_READ: + return PAGE_READONLY; + case VM_EXEC | VM_WRITE: + case VM_EXEC | VM_WRITE | VM_READ: + return PAGE_COPY; + case VM_SHARED: + return PAGE_NONE; + case VM_SHARED | VM_READ: + return PAGE_READONLY; + case VM_SHARED | VM_WRITE: + case VM_SHARED | VM_WRITE | VM_READ: + return PAGE_SHARED; + case VM_SHARED | VM_EXEC: + case VM_SHARED | VM_EXEC | VM_READ: + return PAGE_READONLY; + case VM_SHARED | VM_EXEC | VM_WRITE: + case VM_SHARED | VM_EXEC | VM_WRITE | VM_READ: + return PAGE_SHARED; + default: + BUILD_BUG(); + } +} +EXPORT_SYMBOL(vm_get_page_prot); diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c index 1b23639e2fcd..a390116d371b 100644 --- a/arch/sparc/mm/init_64.c +++ b/arch/sparc/mm/init_64.c @@ -50,6 +50,7 @@ #include <asm/cpudata.h> #include <asm/setup.h> #include <asm/irq.h> +#include <asm/mman.h> #include "init_64.h" @@ -2641,29 +2642,13 @@ static void prot_init_common(unsigned long page_none, { PAGE_COPY = __pgprot(page_copy); PAGE_SHARED = __pgprot(page_shared); - - protection_map[0x0] = __pgprot(page_none); - protection_map[0x1] = __pgprot(page_readonly & ~page_exec_bit); - protection_map[0x2] = __pgprot(page_copy & ~page_exec_bit); - protection_map[0x3] = __pgprot(page_copy & ~page_exec_bit); - protection_map[0x4] = __pgprot(page_readonly); - protection_map[0x5] = __pgprot(page_readonly); - protection_map[0x6] = __pgprot(page_copy); - protection_map[0x7] = __pgprot(page_copy); - protection_map[0x8] = __pgprot(page_none); - protection_map[0x9] = __pgprot(page_readonly & ~page_exec_bit); - protection_map[0xa] = __pgprot(page_shared & ~page_exec_bit); - protection_map[0xb] = __pgprot(page_shared & ~page_exec_bit); - protection_map[0xc] = __pgprot(page_readonly); - protection_map[0xd] = __pgprot(page_readonly); - protection_map[0xe] = __pgprot(page_shared); - protection_map[0xf] = __pgprot(page_shared); } +static unsigned long page_none, page_shared, page_copy, page_readonly; +static unsigned long page_exec_bit; + static void __init sun4u_pgprot_init(void) { - unsigned long page_none, page_shared, page_copy, page_readonly; - unsigned long page_exec_bit; int i; PAGE_KERNEL = __pgprot (_PAGE_PRESENT_4U | _PAGE_VALID | @@ -3183,3 +3168,50 @@ void copy_highpage(struct page *to, struct page *from) } } EXPORT_SYMBOL(copy_highpage); + +static inline pgprot_t __vm_get_page_prot(unsigned long vm_flags) +{ + switch (vm_flags & (VM_READ | VM_WRITE | VM_EXEC | VM_SHARED)) { + case VM_NONE: + return __pgprot(page_none); + case VM_READ: + return __pgprot(page_readonly & ~page_exec_bit); + case VM_WRITE: + case VM_WRITE | VM_READ: + return __pgprot(page_copy & ~page_exec_bit); + case VM_EXEC: + case VM_EXEC | VM_READ: + return __pgprot(page_readonly); + case VM_EXEC | VM_WRITE: + case VM_EXEC | VM_WRITE | VM_READ: + return __pgprot(page_copy); + case VM_SHARED: + return __pgprot(page_none); + case VM_SHARED | VM_READ: + return __pgprot(page_readonly & ~page_exec_bit); + case VM_SHARED | VM_WRITE: + case VM_SHARED | VM_WRITE | VM_READ: + return __pgprot(page_shared & ~page_exec_bit); + case VM_SHARED | VM_EXEC: + case VM_SHARED | VM_EXEC | VM_READ: + return __pgprot(page_readonly); + case VM_SHARED | VM_EXEC | VM_WRITE: + case VM_SHARED | VM_EXEC | VM_WRITE | VM_READ: + return __pgprot(page_shared); + default: + BUILD_BUG(); + } +} + +static pgprot_t sparc_vm_get_page_prot(unsigned long vm_flags) +{ + return (vm_flags & VM_SPARC_ADI) ? __pgprot(_PAGE_MCD_4V) : __pgprot(0); +} + +pgprot_t vm_get_page_prot(unsigned long vm_flags) +{ + return __pgprot(pgprot_val(__vm_get_page_prot(vm_flags)) | + pgprot_val(sparc_vm_get_page_prot(vm_flags))); + +} +EXPORT_SYMBOL(vm_get_page_prot);

[V2,06/30] sparc/mm: Enable ARCH_HAS_VM_GET_PAGE_PROT

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Patch