2017-06-28 |
Merge pull request #978 from etienne-lms/minor-build
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Minor build fixes
danh-arm
authored
on 28 Jun 2017
GitHub
committed
on 28 Jun 2017
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2017-06-23 |
context_mgmt: declare extern cm_set_next_context() for AArch32
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This change avoids warning when setting -Wmissing-prototypes to
compile bl1_context_mgmt.c.
Reported-by: Yann Gautier <yann.gautier@st.com>
Signed-off-by: Etienne Carriere <etienne.carriere@st.com>
Etienne Carriere
committed
on 23 Jun 2017
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2017-06-21 |
Fix issues in FWU code
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This patch fixes the following issues in Firmware Update (FWU) code:
1. The FWU layer maintains a list of loaded image ids and
while checking for image overlaps, INVALID_IMAGE_IDs were not
skipped. The patch now adds code to skip INVALID_IMAGE_IDs.
2. While resetting the state corresponding to an image, the code
now resets the memory used by the image only if the image were
copied previously via IMAGE_COPY smc. This prevents the invalid
zeroing of image memory which are not copied but are directly
authenticated via IMAGE_AUTH smc.
Change-Id: Idf18e69bcba7259411c88807bd0347d59d9afb8f
Signed-off-by: Soby Mathew <soby.mathew@arm.com>
Soby Mathew
committed
on 21 Jun 2017
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2017-06-01 |
FWU: Introduce FWU_SMC_IMAGE_RESET
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This SMC is as a means for the image loading state machine to go from
COPYING, COPIED or AUTHENTICATED states to RESET state. Previously, this
was only done when the authentication of an image failed or when the
execution of the image finished.
Documentation updated.
Change-Id: Ida6d4c65017f83ae5e27465ec36f54499c6534d9
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
Antonio Nino Diaz
committed
on 1 Jun 2017
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FWU: Check for overlaps when loading images
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Added checks to FWU_SMC_IMAGE_COPY to prevent loading data into a
memory region where another image data is already loaded.
Without this check, if two images are configured to be loaded in
overlapping memory regions, one of them can be loaded and
authenticated and the copy function is still able to load data from
the second image on top of the first one. Since the first image is
still in authenticated state, it can be executed, which could lead to
the execution of unauthenticated arbitrary code of the second image.
Firmware update documentation updated.
Change-Id: Ib6871e569794c8e610a5ea59fe162ff5dcec526c
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
Antonio Nino Diaz
committed
on 1 Jun 2017
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2017-05-15 |
AArch32: Add `TRUSTED_BOARD_BOOT` support
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This patch adds `TRUSTED_BOARD_BOOT` support for AArch32 mode.
To build this patch the "mbedtls/include/mbedtls/bignum.h"
needs to be modified to remove `#define MBEDTLS_HAVE_UDBL`
when `MBEDTLS_HAVE_INT32` is defined. This is a workaround
for "https://github.com/ARMmbed/mbedtls/issues/708"
NOTE: TBBR support on Juno AArch32 is not currently supported.
Change-Id: I86d80e30b9139adc4d9663f112801ece42deafcf
Signed-off-by: dp-arm <dimitris.papastamos@arm.com>
Co-Authored-By: Yatharth Kochar <yatharth.kochar@arm.com>
dp-arm
committed
on 15 May 2017
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2017-05-03 |
Use SPDX license identifiers
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To make software license auditing simpler, use SPDX[0] license
identifiers instead of duplicating the license text in every file.
NOTE: Files that have been imported by FreeBSD have not been modified.
[0]: https://spdx.org/
Change-Id: I80a00e1f641b8cc075ca5a95b10607ed9ed8761a
Signed-off-by: dp-arm <dimitris.papastamos@arm.com>
dp-arm
committed
on 3 May 2017
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2017-04-20 |
tspd:FWU:Fix usage of SMC_RET0
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SMC_RET0 should only be used when the SMC code works as a function that
returns void. If the code of the SMC uses SMC_RET1 to return a value to
signify success and doesn't return anything in case of an error (or the
other way around) SMC_RET1 should always be used to return clearly
identifiable values.
This patch fixes two cases in which the code used SMC_RET0 instead of
SMC_RET1.
It also introduces the define SMC_OK to use when an SMC must return a
value to tell that it succeeded, the same way as SMC_UNK is used in case
of failure.
Change-Id: Ie4278b51559e4262aced13bbde4e844023270582
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
Antonio Nino Diaz
committed
on 20 Apr 2017
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2017-02-06 |
![@Douglas Raillard](https://git.lumina-sensum.com/_unknown/_avatar)
Introduce unified API to zero memory
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Introduce zeromem_dczva function on AArch64 that can handle unaligned
addresses and make use of DC ZVA instruction to zero a whole block at a
time. This zeroing takes place directly in the cache to speed it up
without doing external memory access.
Remove the zeromem16 function on AArch64 and replace it with an alias to
zeromem. This zeromem16 function is now deprecated.
Remove the 16-bytes alignment constraint on __BSS_START__ in
firmware-design.md as it is now not mandatory anymore (it used to comply
with zeromem16 requirements).
Change the 16-bytes alignment constraints in SP min's linker script to a
8-bytes alignment constraint as the AArch32 zeromem implementation is now
more efficient on 8-bytes aligned addresses.
Introduce zero_normalmem and zeromem helpers in platform agnostic header
that are implemented this way:
* AArch32:
* zero_normalmem: zero using usual data access
* zeromem: alias for zero_normalmem
* AArch64:
* zero_normalmem: zero normal memory using DC ZVA instruction
(needs MMU enabled)
* zeromem: zero using usual data access
Usage guidelines: in most cases, zero_normalmem should be preferred.
There are 2 scenarios where zeromem (or memset) must be used instead:
* Code that must run with MMU disabled (which means all memory is
considered device memory for data accesses).
* Code that fills device memory with null bytes.
Optionally, the following rule can be applied if performance is
important:
* Code zeroing small areas (few bytes) that are not secrets should use
memset to take advantage of compiler optimizations.
Note: Code zeroing security-related critical information should use
zero_normalmem/zeromem instead of memset to avoid removal by
compilers' optimizations in some cases or misbehaving versions of GCC.
Fixes ARM-software/tf-issues#408
Change-Id: Iafd9663fc1070413c3e1904e54091cf60effaa82
Signed-off-by: Douglas Raillard <douglas.raillard@arm.com>
Douglas Raillard
committed
on 6 Feb 2017
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2016-12-20 |
![@Sandrine Bailleux](https://git.lumina-sensum.com/_unknown/_avatar)
Fix integer overflows in BL1 FWU code
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Before adding a base address and a size to compute the end
address of an image to copy or authenticate, check this
won't result in an integer overflow. If it does then consider
the input arguments are invalid.
As a result, bl1_plat_mem_check() can now safely assume the
end address (computed as the sum of the base address and size
of the memory region) doesn't overflow, as the validation is
done upfront in bl1_fwu_image_copy/auth(). A debug assertion
has been added nonetheless in the ARM implementation in order
to help catching such problems, should bl1_plat_mem_check()
be called in a different context in the future.
Fixes TFV-1: Malformed Firmware Update SMC can result in copy
of unexpectedly large data into secure memory
Change-Id: I8b8f8dd4c8777705722c7bd0e8b57addcba07e25
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
Signed-off-by: Dan Handley <dan.handley@arm.com>
Sandrine Bailleux
authored
on 11 Nov 2016
Dan Handley
committed
on 20 Dec 2016
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Add some debug assertions in BL1 FWU copy code
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These debug assertions sanity check the state of the internal
FWU state machine data when resuming an incomplete image copy
operation.
Change-Id: I38a125b0073658c3e2b4b1bdc623ec221741f43e
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
Sandrine Bailleux
authored
on 14 Nov 2016
Dan Handley
committed
on 20 Dec 2016
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bl1_fwu_image_copy() refactoring
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This patch refactors the code of the function handling a FWU_AUTH_COPY
SMC in BL1. All input validation has been moved upfront so it is now
shared between the RESET and COPYING states.
Change-Id: I6a86576b9ce3243c401c2474fe06f06687a70e2f
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
Signed-off-by: Dan Handley <dan.handley@arm.com>
Sandrine Bailleux
authored
on 14 Nov 2016
Dan Handley
committed
on 20 Dec 2016
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Minor refactoring of BL1 FWU code
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This patch introduces no functional change, it just changes
the serial console output.
- Improve accuracy of error messages by decoupling some
error cases;
- Improve comments;
- Move declaration of 'mem_layout' local variable closer to
where it is used and make it const;
- Rename a local variable to clarify whether it is a source
or a destination address (base_addr -> dest_addr).
Change-Id: I349fcf053e233f316310892211d49e35ef2c39d9
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
Signed-off-by: Dan Handley <dan.handley@arm.com>
Sandrine Bailleux
authored
on 11 Nov 2016
Dan Handley
committed
on 20 Dec 2016
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2016-12-14 |
Enable TRUSTED_BOARD_BOOT support for LOAD_IMAGE_V2=1
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This patch enables TRUSTED_BOARD_BOOT (Authentication and FWU)
support, for AArch64, when LOAD_IMAGE_V2 is enabled.
This patch also enables LOAD_IMAGE_V2 for ARM platforms.
Change-Id: I294a2eebce7a30b6784c80c9d4ac7752808ee3ad
Signed-off-by: Yatharth Kochar <yatharth.kochar@arm.com>
Yatharth Kochar
committed
on 14 Dec 2016
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2016-02-22 |
![@Yatharth Kochar](https://git.lumina-sensum.com/_unknown/_avatar)
Fix the inconsistencies in bl1_tbbr_image_descs[]
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This patch fixes inconsistencies in bl1_tbbr_image_descs[]
and miscellaneous fixes in Firmware Update code.
Following are the changes:
* As part of the original FWU changes, a `copied_size`
field was added to `image_info_t`. This was a subtle binary
compatibility break because it changed the size of the
`bl31_params_t` struct, which could cause problems if
somebody used different versions of BL2 or BL31, one with
the old `image_info_t` and one with the new version.
This patch put the `copied_size` within the `image_desc_t`.
* EXECUTABLE flag is now stored in `ep_info.h.attr` in place
of `image_info.h.attr`, associating it to an entrypoint.
* The `image_info.image_base` is only relevant for secure
images that are copied from non-secure memory into secure
memory. This patch removes initializing `image_base` for
non secure images in the bl1_tbbr_image_descs[].
* A new macro `SET_STATIC_PARAM_HEAD` is added for populating
bl1_tbbr_image_descs[].ep_info/image_info.h members statically.
The version, image_type and image attributes are now
populated using this new macro.
* Added PLAT_ARM_NVM_BASE and PLAT_ARM_NVM_SIZE to avoid direct
usage of V2M_FLASH0_XXX in plat/arm/common/arm_bl1_fwu.c.
* Refactoring of code/macros related to SECURE and EXECUTABLE flags.
NOTE: PLATFORM PORTS THAT RELY ON THE SIZE OF `image_info_t`
OR USE the "EXECUTABLE" BIT WITHIN `image_info_t.h.attr`
OR USE THEIR OWN `image_desc_t` ARRAY IN BL1, MAY BE
BROKEN BY THIS CHANGE. THIS IS CONSIDERED UNLIKELY.
Change-Id: Id4e5989af7bf0ed263d19d3751939da1169b561d
Yatharth Kochar
committed
on 22 Feb 2016
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2015-12-15 |
Merge pull request #470 from danh-arm/dh/fwu-done-fix
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FWU: Pass client cookie to FWU_SMC_UPDATE_DONE
danh-arm
committed
on 15 Dec 2015
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FWU: Pass client cookie to FWU_SMC_UPDATE_DONE
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The current FWU_SMC_UPDATE_DONE implementation incorrectly passes
an unused framework cookie through to the 1st argument in the
platform function `bl1_plat_fwu_done`. The intent is to allow
the SMC caller to pass a cookie through to this function.
This patch fixes FWU_SMC_UPDATE_DONE to pass x1 from the caller
through to `bl1_plat_fwu_done`. The argument names are updated
for clarity.
Upstream platforms currently do not use this argument so no
impact is expected.
Change-Id: I107f4b51eb03e7394f66d9a534ffab1cbc09a9b2
Dan Handley
committed
on 15 Dec 2015
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FWU: Remove image_id arg from FWU_SMC_IMAGE_RESUME
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The current implementation of FWU_SMC_IMAGE_RESUME when called
from the normal world, uses the provided image_id argument to
determine which secure image to resume into. This implies that
the normal world has a choice of which secure image to resume
into when in fact it is only possible to resume into the
previously interrupted secure image.
This patch removes the argument, tightens up the pre-conditions
for the SMC and adds additional asserts.
The pre-conditions for FWU_SMC_SEC_IMAGE_DONE are also
tightened up.
Change-Id: Ia5a46753bb01e8f8dad8a2999314f90db8f300e8
Dan Handley
committed
on 15 Dec 2015
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2015-12-14 |
FWU: Fix secure memory check in image auth
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The implementation of FWU_SMC_IMAGE_AUTH performs a number of
pre-condition checks before authenticating the image. One of
these checks calls `bl1_plat_mem_check()` to ensure the image
source is mapped in when authenticating an image in place.
The framework incorrectly passes the security state of the
caller into this function instead of the security state of
the source image.
This patch corrects the defect. The defect would only
manifest itself for secure world callers authenticating
non-secure images in place, which is not done by current
upstream platforms.
Change-Id: I617c7b43e02ac7149f266aeaf3874316e62f3003
Dan Handley
committed
on 14 Dec 2015
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2015-12-09 |
![@Yatharth Kochar](https://git.lumina-sensum.com/_unknown/_avatar)
FWU: Add Generic Firmware Update framework support in BL1
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Firmware update(a.k.a FWU) feature is part of the TBB architecture.
BL1 is responsible for carrying out the FWU process if platform
specific code detects that it is needed.
This patch adds support for FWU feature support in BL1 which is
included by enabling `TRUSTED_BOARD_BOOT` compile time flag.
This patch adds bl1_fwu.c which contains all the core operations
of FWU, which are; SMC handler, image copy, authentication, execution
and resumption. It also adds bl1.h introducing #defines for all
BL1 SMCs.
Following platform porting functions are introduced:
int bl1_plat_mem_check(uintptr_t mem_base, unsigned int mem_size,
unsigned int flags);
This function can be used to add platform specific memory checks
for the provided base/size for the given security state.
The weak definition will invoke `assert()` and return -ENOMEM.
__dead2 void bl1_plat_fwu_done(void *cookie, void *reserved);
This function can be used to initiate platform specific procedure
to mark completion of the FWU process.
The weak definition waits forever calling `wfi()`.
plat_bl1_common.c contains weak definitions for above functions.
FWU process starts when platform detects it and return the image_id
other than BL2_IMAGE_ID by using `bl1_plat_get_next_image_id()` in
`bl1_main()`.
NOTE: User MUST provide platform specific real definition for
bl1_plat_mem_check() in order to use it for Firmware update.
Change-Id: Ice189a0885d9722d9e1dd03f76cac1aceb0e25ed
Yatharth Kochar
committed
on 9 Dec 2015
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