linux-stable.git/arch/arm64/Kconfig.debug, branch linux-4.3.y Linux kernel stable tree coresight: moving to new "hwtracing" directory 2015-04-03T14:17:04+00:00 Mathieu Poirier mathieu.poirier@linaro.org 2015-03-30T20:13:41+00:00 01081f5ab9916603555f236b11f76bb00e4e01e9 Keeping drivers related to HW tracing on ARM, i.e coresight, under "drivers/coresight" doesn't make sense when other architectures start rolling out technologies of the same nature. As such creating a new "drivers/hwtracing" directory where all drivers of the same kind can reside, reducing namespace pollution under "drivers/". Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
Keeping drivers related to HW tracing on ARM, i.e coresight,
under "drivers/coresight" doesn't make sense when other
architectures start rolling out technologies of the same
nature.

As such creating a new "drivers/hwtracing" directory where all
drivers of the same kind can reside, reducing namespace
pollution under "drivers/".

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
coresight: Adding coresight support for arm64 architecture 2015-04-03T14:17:03+00:00 Mathieu Poirier mathieu.poirier@linaro.org 2015-03-30T20:13:36+00:00 3288731e628e0269c20d86e43b647d0b92f2b3fc Most CoreSight blocks are 64-bit ready. As such move configuration entries from "arch/arm/Kconfig.config" to the driver's subdirectory and source the newly created Kconfig from architecture specific Kconfig.debug files. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
Most CoreSight blocks are 64-bit ready.  As such move configuration
entries from "arch/arm/Kconfig.config" to the driver's subdirectory
and source the newly created Kconfig from architecture specific
Kconfig.debug files.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
arm64: add better page protections to arm64 2015-01-22T14:54:29+00:00 Laura Abbott lauraa@codeaurora.org 2015-01-22T01:36:06+00:00 da141706aea52c1a9fbd28cb8d289b78819f5436 Add page protections for arm64 similar to those in arm. This is for security reasons to prevent certain classes of exploits. The current method: - Map all memory as either RWX or RW. We round to the nearest section to avoid creating page tables before everything is mapped - Once everything is mapped, if either end of the RWX section should not be X, we split the PMD and remap as necessary - When initmem is to be freed, we change the permissions back to RW (using stop machine if necessary to flush the TLB) - If CONFIG_DEBUG_RODATA is set, the read only sections are set read only. Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Tested-by: Kees Cook <keescook@chromium.org> Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Laura Abbott <lauraa@codeaurora.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> 
Add page protections for arm64 similar to those in arm.
This is for security reasons to prevent certain classes
of exploits. The current method:

- Map all memory as either RWX or RW. We round to the nearest
  section to avoid creating page tables before everything is mapped
- Once everything is mapped, if either end of the RWX section should
  not be X, we split the PMD and remap as necessary
- When initmem is to be freed, we change the permissions back to
  RW (using stop machine if necessary to flush the TLB)
- If CONFIG_DEBUG_RODATA is set, the read only sections are set
  read only.

Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Tested-by: Kees Cook <keescook@chromium.org>
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
arm64: add support to dump the kernel page tables 2014-11-26T17:19:18+00:00 Laura Abbott lauraa@codeaurora.org 2014-11-26T00:28:39+00:00 c9465b4ec37a68425c5a574b56280dc1a7e34070 In a similar manner to arm, it's useful to be able to dump the page tables to verify permissions and memory types. Add a debugfs file to check the page tables. Acked-by: Steve Capper <steve.capper@linaro.org> Tested-by: Steve Capper <steve.capper@linaro.org> Reviewed-by: Mark Rutland <mark.rutland@arm.com> Tested-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Laura Abbott <lauraa@codeaurora.org> [will: s/BUFFERABLE/NORMAL-NC/] Signed-off-by: Will Deacon <will.deacon@arm.com> 
In a similar manner to arm, it's useful to be able to dump the page
tables to verify permissions and memory types. Add a debugfs file
to check the page tables.

Acked-by: Steve Capper <steve.capper@linaro.org>
Tested-by: Steve Capper <steve.capper@linaro.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
[will: s/BUFFERABLE/NORMAL-NC/]
Signed-off-by: Will Deacon <will.deacon@arm.com>
arm64: Add CONFIG_DEBUG_SET_MODULE_RONX support 2014-09-08T13:39:18+00:00 Laura Abbott lauraa@codeaurora.org 2014-08-19T19:41:43+00:00 11d91a770f1fff44dafdf88d6089a3451f99c9b6 In a similar fashion to other architecture, add the infrastructure and Kconfig to enable DEBUG_SET_MODULE_RONX support. When enabled, module ranges will be marked read-only/no-execute as appropriate. Signed-off-by: Laura Abbott <lauraa@codeaurora.org> [will: fixed off-by-one in module end check] Signed-off-by: Will Deacon <will.deacon@arm.com> 
In a similar fashion to other architecture, add the infrastructure
and Kconfig to enable DEBUG_SET_MODULE_RONX support. When
enabled, module ranges will be marked read-only/no-execute as
appropriate.

Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
[will: fixed off-by-one in module end check]
Signed-off-by: Will Deacon <will.deacon@arm.com>
arm64: Enable TEXT_OFFSET fuzzing 2014-07-10T11:36:58+00:00 Mark Rutland mark.rutland@arm.com 2014-06-24T15:51:37+00:00 da57a369d3bc5cd61db90f7e9555840381db9b09 The arm64 Image header contains a text_offset field which bootloaders are supposed to read to determine the offset (from a 2MB aligned "start of memory" per booting.txt) at which to load the kernel. The offset is not well respected by bootloaders at present, and due to the lack of variation there is little incentive to support it. This is unfortunate for the sake of future kernels where we may wish to vary the text offset (even zeroing it). This patch adds options to arm64 to enable fuzz-testing of text_offset. CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET forces the text offset to a random 16-byte aligned value value in the range [0..2MB) upon a build of the kernel. It is recommended that distribution kernels enable randomization to test bootloaders such that any compliance issues can be fixed early. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Tom Rini <trini@ti.com> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> 
The arm64 Image header contains a text_offset field which bootloaders
are supposed to read to determine the offset (from a 2MB aligned "start
of memory" per booting.txt) at which to load the kernel. The offset is
not well respected by bootloaders at present, and due to the lack of
variation there is little incentive to support it. This is unfortunate
for the sake of future kernels where we may wish to vary the text offset
(even zeroing it).

This patch adds options to arm64 to enable fuzz-testing of text_offset.
CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET forces the text offset to a random
16-byte aligned value value in the range [0..2MB) upon a build of the
kernel. It is recommended that distribution kernels enable randomization
to test bootloaders such that any compliance issues can be fixed early.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Tom Rini <trini@ti.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
arm64: remove arch specific earlyprintk 2014-04-24T23:32:27+00:00 Rob Herring robh@kernel.org 2014-04-18T22:20:00+00:00 8ef0ed95ee040a5cd25325dddcb8292c34bec33e Now that we have equivalent earlycon support, arm64's earlyprintk code can be removed. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
Now that we have equivalent earlycon support, arm64's earlyprintk code
can be removed.

Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
arm64: Add missing Kconfig for CONFIG_STRICT_DEVMEM 2014-04-07T16:33:13+00:00 Laura Abbott lauraa@codeaurora.org 2014-04-05T00:30:50+00:00 d253b4406df69fa7a74231769d6f6ad80dc33063 The Kconfig for CONFIG_STRICT_DEVMEM is missing despite being used in mmap.c. Add it. Signed-off-by: Laura Abbott <lauraa@codeaurora.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> 
The Kconfig for CONFIG_STRICT_DEVMEM is missing despite being
used in mmap.c. Add it.

Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
arm64: Remove duplicate DEBUG_STACK_USAGE config 2013-10-02T17:03:26+00:00 Stephen Boyd sboyd@codeaurora.org 2013-10-01T20:48:43+00:00 09d3ce74d7d60f37d1b030886ec659bbfe2e73bf This config item already exists generically in lib/Kconfig.debug. Remove the duplicate config in arm64. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> 
This config item already exists generically in lib/Kconfig.debug.
Remove the duplicate config in arm64.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
arm64: Kconfig.debug: Remove unused CONFIG_DEBUG_ERRORS 2013-03-19T16:19:19+00:00 Paul Bolle pebolle@tiscali.nl 2013-03-19T15:41:37+00:00 792072066d30372772137be9ee2f4d72d77329f9 The Kconfig entry for DEBUG_ERRORS is a verbatim copy of the former arm entry for that symbol. It got removed in v2.6.39 because it wasn't actually used anywhere. There are still no users of DEBUG_ERRORS so remove this entry too. Signed-off-by: Paul Bolle <pebolle@tiscali.nl> [catalin.marinas@arm.com: removed option from defconfig] Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> 
The Kconfig entry for DEBUG_ERRORS is a verbatim copy of the former arm
entry for that symbol. It got removed in v2.6.39 because it wasn't
actually used anywhere. There are still no users of DEBUG_ERRORS so
remove this entry too.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
[catalin.marinas@arm.com: removed option from defconfig]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>