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Message-ID: <tip-e6bfb70959a0ca6ddedb29e779a293c6f71ed0e7@git.kernel.org>
Date: Thu, 18 Feb 2016 12:25:32 -0800
From: tip-bot for Dave Hansen <tipbot@...or.com>
To: linux-tip-commits@...r.kernel.org
Cc: paul.gortmaker@...driver.com, vdavydov@...tuozzo.com,
yamada.masahiro@...ionext.com, luto@...capital.net,
benh@...nel.crashing.org, brgerst@...il.com, dave@...1.net,
oleg@...hat.com, mgorman@...e.de, peterz@...radead.org,
airlied@...ux.ie, david@...morbit.com, leon@...n.nu,
dan.j.williams@...el.com, mpe@...erman.id.au, tglx@...utronix.de,
dave.hansen@...ux.intel.com, riel@...hat.com, koct9i@...il.com,
mingo@...nel.org, gang.chen.5i5j@...il.com,
linux-kernel@...r.kernel.org, dvlasenk@...hat.com, bp@...en8.de,
torvalds@...ux-foundation.org, ebiederm@...ssion.com,
mcoquelin.stm32@...il.com, aarcange@...hat.com,
gregkh@...uxfoundation.org, geliangtang@....com,
riandrews@...roid.com, akpm@...ux-foundation.org, hpa@...or.com,
arve@...roid.com, paulus@...ba.org, kirill.shutemov@...ux.intel.com
Subject: [tip:mm/pkeys] mm/core, arch, powerpc:
Pass a protection key in to calc_vm_flag_bits()
Commit-ID: e6bfb70959a0ca6ddedb29e779a293c6f71ed0e7
Gitweb: http://git.kernel.org/tip/e6bfb70959a0ca6ddedb29e779a293c6f71ed0e7
Author: Dave Hansen <dave.hansen@...ux.intel.com>
AuthorDate: Fri, 12 Feb 2016 13:02:31 -0800
Committer: Ingo Molnar <mingo@...nel.org>
CommitDate: Thu, 18 Feb 2016 19:46:30 +0100
mm/core, arch, powerpc: Pass a protection key in to calc_vm_flag_bits()
This plumbs a protection key through calc_vm_flag_bits(). We
could have done this in calc_vm_prot_bits(), but I did not feel
super strongly which way to go. It was pretty arbitrary which
one to use.
Signed-off-by: Dave Hansen <dave.hansen@...ux.intel.com>
Reviewed-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Andrea Arcangeli <aarcange@...hat.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Andy Lutomirski <luto@...capital.net>
Cc: Arve Hjønnevåg <arve@...roid.com>
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Brian Gerst <brgerst@...il.com>
Cc: Chen Gang <gang.chen.5i5j@...il.com>
Cc: Dan Williams <dan.j.williams@...el.com>
Cc: Dave Chinner <david@...morbit.com>
Cc: Dave Hansen <dave@...1.net>
Cc: David Airlie <airlied@...ux.ie>
Cc: Denys Vlasenko <dvlasenk@...hat.com>
Cc: Eric W. Biederman <ebiederm@...ssion.com>
Cc: Geliang Tang <geliangtang@....com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
Cc: Konstantin Khlebnikov <koct9i@...il.com>
Cc: Leon Romanovsky <leon@...n.nu>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc: Maxime Coquelin <mcoquelin.stm32@...il.com>
Cc: Mel Gorman <mgorman@...e.de>
Cc: Michael Ellerman <mpe@...erman.id.au>
Cc: Oleg Nesterov <oleg@...hat.com>
Cc: Paul Gortmaker <paul.gortmaker@...driver.com>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Rik van Riel <riel@...hat.com>
Cc: Riley Andrews <riandrews@...roid.com>
Cc: Vladimir Davydov <vdavydov@...tuozzo.com>
Cc: devel@...verdev.osuosl.org
Cc: linux-api@...r.kernel.org
Cc: linux-arch@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Cc: linux-mm@...ck.org
Cc: linuxppc-dev@...ts.ozlabs.org
Link: http://lkml.kernel.org/r/20160212210231.E6F1F0D6@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
arch/powerpc/include/asm/mman.h | 5 +++--
drivers/char/agp/frontend.c | 2 +-
drivers/staging/android/ashmem.c | 4 ++--
include/linux/mman.h | 6 +++---
mm/mmap.c | 2 +-
mm/mprotect.c | 2 +-
mm/nommu.c | 2 +-
7 files changed, 12 insertions(+), 11 deletions(-)
diff --git a/arch/powerpc/include/asm/mman.h b/arch/powerpc/include/asm/mman.h
index 8565c25..2563c43 100644
--- a/arch/powerpc/include/asm/mman.h
+++ b/arch/powerpc/include/asm/mman.h
@@ -18,11 +18,12 @@
* This file is included by linux/mman.h, so we can't use cacl_vm_prot_bits()
* here. How important is the optimization?
*/
-static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot)
+static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot,
+ unsigned long pkey)
{
return (prot & PROT_SAO) ? VM_SAO : 0;
}
-#define arch_calc_vm_prot_bits(prot) arch_calc_vm_prot_bits(prot)
+#define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey)
static inline pgprot_t arch_vm_get_page_prot(unsigned long vm_flags)
{
diff --git a/drivers/char/agp/frontend.c b/drivers/char/agp/frontend.c
index 09f17eb..0f64d14 100644
--- a/drivers/char/agp/frontend.c
+++ b/drivers/char/agp/frontend.c
@@ -156,7 +156,7 @@ static pgprot_t agp_convert_mmap_flags(int prot)
{
unsigned long prot_bits;
- prot_bits = calc_vm_prot_bits(prot) | VM_SHARED;
+ prot_bits = calc_vm_prot_bits(prot, 0) | VM_SHARED;
return vm_get_page_prot(prot_bits);
}
diff --git a/drivers/staging/android/ashmem.c b/drivers/staging/android/ashmem.c
index 5bb1283..2695ff1 100644
--- a/drivers/staging/android/ashmem.c
+++ b/drivers/staging/android/ashmem.c
@@ -372,8 +372,8 @@ static int ashmem_mmap(struct file *file, struct vm_area_struct *vma)
}
/* requested protection bits must match our allowed protection mask */
- if (unlikely((vma->vm_flags & ~calc_vm_prot_bits(asma->prot_mask)) &
- calc_vm_prot_bits(PROT_MASK))) {
+ if (unlikely((vma->vm_flags & ~calc_vm_prot_bits(asma->prot_mask, 0)) &
+ calc_vm_prot_bits(PROT_MASK, 0))) {
ret = -EPERM;
goto out;
}
diff --git a/include/linux/mman.h b/include/linux/mman.h
index 16373c8..33e17f6 100644
--- a/include/linux/mman.h
+++ b/include/linux/mman.h
@@ -35,7 +35,7 @@ static inline void vm_unacct_memory(long pages)
*/
#ifndef arch_calc_vm_prot_bits
-#define arch_calc_vm_prot_bits(prot) 0
+#define arch_calc_vm_prot_bits(prot, pkey) 0
#endif
#ifndef arch_vm_get_page_prot
@@ -70,12 +70,12 @@ static inline int arch_validate_prot(unsigned long prot)
* Combine the mmap "prot" argument into "vm_flags" used internally.
*/
static inline unsigned long
-calc_vm_prot_bits(unsigned long prot)
+calc_vm_prot_bits(unsigned long prot, unsigned long pkey)
{
return _calc_vm_trans(prot, PROT_READ, VM_READ ) |
_calc_vm_trans(prot, PROT_WRITE, VM_WRITE) |
_calc_vm_trans(prot, PROT_EXEC, VM_EXEC) |
- arch_calc_vm_prot_bits(prot);
+ arch_calc_vm_prot_bits(prot, pkey);
}
/*
diff --git a/mm/mmap.c b/mm/mmap.c
index e2e9f48..784d2d6 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1313,7 +1313,7 @@ unsigned long do_mmap(struct file *file, unsigned long addr,
* to. we assume access permissions have been handled by the open
* of the memory object, so we don't do any here.
*/
- vm_flags |= calc_vm_prot_bits(prot) | calc_vm_flag_bits(flags) |
+ vm_flags |= calc_vm_prot_bits(prot, 0) | calc_vm_flag_bits(flags) |
mm->def_flags | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC;
if (flags & MAP_LOCKED)
diff --git a/mm/mprotect.c b/mm/mprotect.c
index f7cb3d4..3790c8b 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -380,7 +380,7 @@ SYSCALL_DEFINE3(mprotect, unsigned long, start, size_t, len,
if ((prot & PROT_READ) && (current->personality & READ_IMPLIES_EXEC))
prot |= PROT_EXEC;
- vm_flags = calc_vm_prot_bits(prot);
+ vm_flags = calc_vm_prot_bits(prot, 0);
down_write(¤t->mm->mmap_sem);
diff --git a/mm/nommu.c b/mm/nommu.c
index b64d04d..5ba39b8 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1082,7 +1082,7 @@ static unsigned long determine_vm_flags(struct file *file,
{
unsigned long vm_flags;
- vm_flags = calc_vm_prot_bits(prot) | calc_vm_flag_bits(flags);
+ vm_flags = calc_vm_prot_bits(prot, 0) | calc_vm_flag_bits(flags);
/* vm_flags |= mm->def_flags; */
if (!(capabilities & NOMMU_MAP_DIRECT)) {
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