The patch titled
Subject: sparc/mm: enable ARCH_HAS_VM_GET_PAGE_PROT
has been added to the -mm tree. Its filename is
sparc-mm-enable-arch_has_vm_get_page_prot.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/sparc-mm-enable-arch_has_vm_get_page_prot.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/sparc-mm-enable-arch_has_vm_get_page_prot.patch
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------------------------------------------------------
From: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Subject: sparc/mm: enable ARCH_HAS_VM_GET_PAGE_PROT
This defines and exports a platform specific custom vm_get_page_prot() via
subscribing ARCH_HAS_VM_GET_PAGE_PROT. Subsequently all __SXXX and __PXXX
macros can be dropped which are no longer needed. This also localizes the
helper arch_vm_get_page_prot() as sparc_vm_get_page_prot() and moves near
vm_get_page_prot().
Link: https://lkml.kernel.org/r/1645425519-9034-7-git-send-email-anshuman.khandual@xxxxxxx
Signed-off-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Reviewed-by: Khalid Aziz <khalid.aziz@xxxxxxxxxx>
Acked-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/sparc/Kconfig | 2
arch/sparc/include/asm/mman.h | 6 --
arch/sparc/include/asm/pgtable_32.h | 19 -------
arch/sparc/include/asm/pgtable_64.h | 19 -------
arch/sparc/mm/init_32.c | 35 +++++++++++++
arch/sparc/mm/init_64.c | 70 ++++++++++++++++++--------
6 files changed, 88 insertions(+), 63 deletions(-)
--- a/arch/sparc/include/asm/mman.h~sparc-mm-enable-arch_has_vm_get_page_prot
+++ a/arch/sparc/include/asm/mman.h
@@ -46,12 +46,6 @@ static inline unsigned long sparc_calc_v
}
}
-#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)
{
--- a/arch/sparc/include/asm/pgtable_32.h~sparc-mm-enable-arch_has_vm_get_page_prot
+++ a/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.
--- a/arch/sparc/include/asm/pgtable_64.h~sparc-mm-enable-arch_has_vm_get_page_prot
+++ a/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);
--- a/arch/sparc/Kconfig~sparc-mm-enable-arch_has_vm_get_page_prot
+++ a/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
--- a/arch/sparc/mm/init_32.c~sparc-mm-enable-arch_has_vm_get_page_prot
+++ a/arch/sparc/mm/init_32.c
@@ -302,3 +302,38 @@ void sparc_flush_page_to_ram(struct 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);
--- a/arch/sparc/mm/init_64.c~sparc-mm-enable-arch_has_vm_get_page_prot
+++ a/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 lo
{
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, stru
}
}
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);
_
Patches currently in -mm which might be from anshuman.khandual@xxxxxxx are
mm-generalize-arch_has_filter_pgprot.patch
mm-merge-pte_mkhuge-call-into-arch_make_huge_pte.patch
mm-debug_vm_pgtable-drop-protection_map-usage.patch
mm-mmap-clarify-protection_map-indices.patch
mm-mmap-add-new-config-arch_has_vm_get_page_prot.patch
powerpc-mm-enable-arch_has_vm_get_page_prot.patch
arm64-mm-enable-arch_has_vm_get_page_prot.patch
sparc-mm-enable-arch_has_vm_get_page_prot.patch
mips-mm-enable-arch_has_vm_get_page_prot.patch
m68k-mm-enable-arch_has_vm_get_page_prot.patch
arm-mm-enable-arch_has_vm_get_page_prot.patch
mm-mmap-drop-protection_map.patch
mm-mmap-drop-arch_filter_pgprot.patch
mm-mmap-drop-arch_vm_get_page_pgprot.patch
s390-mm-enable-arch_has_vm_get_page_prot.patch
riscv-mm-enable-arch_has_vm_get_page_prot.patch
alpha-mm-enable-arch_has_vm_get_page_prot.patch
sh-mm-enable-arch_has_vm_get_page_prot.patch
arc-mm-enable-arch_has_vm_get_page_prot.patch
csky-mm-enable-arch_has_vm_get_page_prot.patch
extensa-mm-enable-arch_has_vm_get_page_prot.patch
parisc-mm-enable-arch_has_vm_get_page_prot.patch
openrisc-mm-enable-arch_has_vm_get_page_prot.patch
um-mm-enable-arch_has_vm_get_page_prot.patch
microblaze-mm-enable-arch_has_vm_get_page_prot.patch
nios2-mm-enable-arch_has_vm_get_page_prot.patch
hexagon-mm-enable-arch_has_vm_get_page_prot.patch
nds32-mm-enable-arch_has_vm_get_page_prot.patch
ia64-mm-enable-arch_has_vm_get_page_prot.patch
mm-mmap-drop-generic-vm_get_page_prot.patch
mm-mmap-drop-arch_has_vm_get_page_prot.patch
mm-hugetlb-generalize-arch_want_general_hugetlb.patch
mm-migration-add-trace-events-for-thp-migrations.patch
mm-migration-add-trace-events-for-base-page-and-hugetlb-migrations.patch
