linux-stable.git/arch/arm/kernel/vmlinux.lds.S, branch v4.0 Linux kernel stable tree Merge tag 'ronx-next' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux into devel-stable 2014-11-03T10:12:13+00:00 Russell King rmk+kernel@arm.linux.org.uk 2014-11-03T10:12:13+00:00 06e944b8e5fc4bec83f102f98c1ee4f972f5f072 generic fixmaps ARM support for CONFIG_DEBUG_RODATA 
generic fixmaps
ARM support for CONFIG_DEBUG_RODATA
ARM: mm: allow text and rodata sections to be read-only 2014-10-16T21:38:54+00:00 Kees Cook keescook@chromium.org 2014-04-03T20:29:50+00:00 80d6b0c2eed2a504f6740cd1f5ea76dc50abfc4d This introduces CONFIG_DEBUG_RODATA, making kernel text and rodata read-only. Additionally, this splits rodata from text so that rodata can also be NX, which may lead to wasted memory when aligning to SECTION_SIZE. The read-only areas are made writable during ftrace updates and kexec. Signed-off-by: Kees Cook <keescook@chromium.org> Tested-by: Laura Abbott <lauraa@codeaurora.org> Acked-by: Nicolas Pitre <nico@linaro.org> 
This introduces CONFIG_DEBUG_RODATA, making kernel text and rodata
read-only. Additionally, this splits rodata from text so that rodata can
also be NX, which may lead to wasted memory when aligning to SECTION_SIZE.
The read-only areas are made writable during ftrace updates and kexec.

Signed-off-by: Kees Cook <keescook@chromium.org>
Tested-by: Laura Abbott <lauraa@codeaurora.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
ARM: mm: allow non-text sections to be non-executable 2014-10-16T21:38:54+00:00 Kees Cook keescook@chromium.org 2014-04-04T00:28:11+00:00 1e6b48116a95046ec51f3d40f83aff8b006674d7 Adds CONFIG_ARM_KERNMEM_PERMS to separate the kernel memory regions into section-sized areas that can have different permisions. Performs the NX permission changes during free_initmem, so that init memory can be reclaimed. This uses section size instead of PMD size to reduce memory lost to padding on non-LPAE systems. Based on work by Brad Spengler, Larry Bassel, and Laura Abbott. Signed-off-by: Kees Cook <keescook@chromium.org> Tested-by: Laura Abbott <lauraa@codeaurora.org> Acked-by: Nicolas Pitre <nico@linaro.org> 
Adds CONFIG_ARM_KERNMEM_PERMS to separate the kernel memory regions
into section-sized areas that can have different permisions. Performs
the NX permission changes during free_initmem, so that init memory can be
reclaimed.

This uses section size instead of PMD size to reduce memory lost to
padding on non-LPAE systems.

Based on work by Brad Spengler, Larry Bassel, and Laura Abbott.

Signed-off-by: Kees Cook <keescook@chromium.org>
Tested-by: Laura Abbott <lauraa@codeaurora.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
ARM: 8168/1: extend __init_end to a page align address 2014-10-02T20:28:16+00:00 Yalin Wang Yalin.Wang@sonymobile.com 2014-09-26T02:30:59+00:00 562c85cadb065e33ec9f651b8d41cdfd3054a5d0 This patch changes the __init_end address to a page align address, so that free_initmem() can free the whole .init section, because if the end address is not page aligned, it will round down to a page align address, then the tail unligned page will not be freed. Signed-off-by: wang <yalin.wang2010@gmail.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
This patch changes the __init_end address to a
page align address, so that free_initmem() can
free the whole .init section, because if the end
address is not page aligned, it will round down to
a page align address, then the tail unligned page
will not be freed.

Signed-off-by: wang <yalin.wang2010@gmail.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: 8088/1: vmlinux.lds.S: drop redundant .comment 2014-07-18T11:29:23+00:00 Mark Rutland mark.rutland@arm.com 2014-06-30T14:40:40+00:00 76e7d5c4fd211061e56d2013a0ec9f875824c546 Commit 78d7530ac3 ("ARM: Clean up linker script using new linker script macros.") modified the arm kernel linker script to use the STABS_DEBUG macro, but left a .comment section definition. As STABS_DEBUG defines the .comment section in an identical way, the second section definition is redundant and can be removed. This patch removes the redundant .comment section definition. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Commit 78d7530ac3 ("ARM: Clean up linker script using new linker script
macros.") modified the arm kernel linker script to use the STABS_DEBUG
macro, but left a .comment section definition. As STABS_DEBUG defines
the .comment section in an identical way, the second section definition
is redundant and can be removed.

This patch removes the redundant .comment section definition.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: use linker magic for vectors and vector stubs 2013-07-31T20:34:24+00:00 Russell King rmk+kernel@arm.linux.org.uk 2013-07-04T11:03:31+00:00 b9b32bf70f2fb710b07c94e13afbc729afe221da Use linker magic to create the vectors and vector stubs: we can tell the linker to place them at an appropriate VMA, but keep the LMA within the kernel. This gets rid of some unnecessary symbol manipulation, and have the linker calculate the relocations appropriately. Cc: <stable@vger.kernel.org> Acked-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Use linker magic to create the vectors and vector stubs: we can tell the
linker to place them at an appropriate VMA, but keep the LMA within the
kernel.  This gets rid of some unnecessary symbol manipulation, and
have the linker calculate the relocations appropriately.

Cc: <stable@vger.kernel.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Finally eradicate CONFIG_HOTPLUG 2013-06-03T21:20:18+00:00 Stephen Rothwell sfr@canb.auug.org.au 2013-05-21T03:49:35+00:00 40b313608ad4ea655addd2ec6cdd106477ae8e15 Ever since commit 45f035ab9b8f ("CONFIG_HOTPLUG should be always on"), it has been basically impossible to build a kernel with CONFIG_HOTPLUG turned off. Remove all the remaining references to it. Cc: Russell King <linux@arm.linux.org.uk> Cc: Doug Thompson <dougthompson@xmission.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Pavel Machek <pavel@ucw.cz> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com> Acked-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
Ever since commit 45f035ab9b8f ("CONFIG_HOTPLUG should be always on"),
it has been basically impossible to build a kernel with CONFIG_HOTPLUG
turned off.  Remove all the remaining references to it.

Cc: Russell King <linux@arm.linux.org.uk>
Cc: Doug Thompson <dougthompson@xmission.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
ARM: KVM: enforce maximum size for identity mapped code 2013-04-29T05:23:09+00:00 Marc Zyngier marc.zyngier@arm.com 2013-04-12T18:12:04+00:00 0394e1f605208706e4e1999d06a4570b9f583b7f We're about to move to an init procedure where we rely on the fact that the init code fits in a single page. Make sure we align the idmap text on a vector alignment, and that the code is not bigger than a single page. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu> 
We're about to move to an init procedure where we rely on the
fact that the init code fits in a single page. Make sure we
align the idmap text on a vector alignment, and that the code is
not bigger than a single page.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <cdall@cs.columbia.edu>
ARM: Section based HYP idmap 2013-01-23T18:29:09+00:00 Christoffer Dall c.dall@virtualopensystems.com 2013-01-20T23:43:10+00:00 9e9a367c29cebd25a356d53414612e115efdadcf Add a method (hyp_idmap_setup) to populate a hyp pgd with an identity mapping of the code contained in the .hyp.idmap.text section. Offer a method to drop this identity mapping through hyp_idmap_teardown. Make all the above depend on CONFIG_ARM_VIRT_EXT and CONFIG_ARM_LPAE. Reviewed-by: Will Deacon <will.deacon@arm.com> Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com> 
Add a method (hyp_idmap_setup) to populate a hyp pgd with an
identity mapping of the code contained in the .hyp.idmap.text
section.

Offer a method to drop this identity mapping through
hyp_idmap_teardown.

Make all the above depend on CONFIG_ARM_VIRT_EXT and CONFIG_ARM_LPAE.

Reviewed-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
ARM: 7605/1: vmlinux.lds: Move .notes section next to the rodata 2012-12-16T10:04:24+00:00 Pawel Moll pawel.moll@arm.com 2012-12-14T15:46:17+00:00 dad5451a322bb682704f3ab13a558508a83e0b93 The .notes, being read-only data by nature, were placed between read-write .data and .bss. This was harmful in case of the XIP kernel, as being placed in the RAM range, most likely far from the ROM address, was inflating the XIP images. Moving the .notes at the end of the read-only section (consisting of .text, .rodata and unwind info) fixes the problem. Reported-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Pawel Moll <pawel.moll@arm.com> Tested-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
The .notes, being read-only data by nature, were placed between
read-write .data and .bss. This was harmful in case of the XIP
kernel, as being placed in the RAM range, most likely far
from the ROM address, was inflating the XIP images.

Moving the .notes at the end of the read-only section
(consisting of .text, .rodata and unwind info) fixes the problem.

Reported-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Tested-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>