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  1. 06 Aug, 2018 1 commit
  3. 15 Jul, 2018 1 commit
  5. 13 Jul, 2018 1 commit
  7. 11 Jul, 2018 1 commit
    • Roberto Vargas's avatar
      Add end_vector_entry assembler macro · a9203eda
      Roberto Vargas authored 
      

Check_vector_size checks if the size of the vector fits
in the size reserved for it. This check creates problems in
the Clang assembler. A new macro, end_vector_entry, is added
and check_vector_size is deprecated.

This new macro fills the current exception vector until the next
exception vector. If the size of the current vector is bigger
than 32 instructions then it gives an error.

Change-Id: Ie8545cf1003a1e31656a1018dd6b4c28a4eaf671
Signed-off-by: default avatarRoberto Vargas <roberto.vargas@arm.com>
      a9203eda
  9. 22 Jun, 2018 3 commits
  11. 21 Jun, 2018 3 commits
    • Jeenu Viswambharan's avatar
      SDEI: Make dispatches synchronous · cdb6ac94
      Jeenu Viswambharan authored 
      

SDEI event dispatches currently only sets up the Non-secure context
before returning to the caller. The actual dispatch only happens upon
exiting EL3 next time.

However, for various error handling scenarios, it's beneficial to have
the dispatch happen synchronously. I.e. when receiving SDEI interrupt,
or for a successful sdei_dispatch_event() call, the event handler is
executed; and upon the event completion, dispatcher execution resumes
after the point of dispatch. The jump primitives introduced in the
earlier patch facilitates this feature.

With this patch:

  - SDEI interrupts and calls to sdei_dispatch_event prepares the NS
    context for event dispatch, then sets a jump point, and immediately
    exits EL3. This results in the client handler executing in
    Non-secure.

  - When the SDEI client completes the dispatched event, the SDEI
    dispatcher does a longjmp to the jump pointer created earlier. For
    the caller of the sdei_dispatch_event() in particular, this would
    appear as if call returned successfully.

The dynamic workaround for CVE_2018_3639 is slightly shifted around as
part of related minor refactoring. It doesn't affect the workaround
functionality.

Documentation updated.

NOTE: This breaks the semantics of the explicit dispatch API, and any
exiting usages should be carefully reviewed.

Change-Id: Ib9c876d27ea2af7fb22de49832e55a0da83da3f9
Signed-off-by: default avatarJeenu Viswambharan <jeenu.viswambharan@arm.com>
      cdb6ac94
    • Jeenu Viswambharan's avatar
      SDEI: Determine client EL from NS context's SCR_EL3 · 2ccfcb2e
      Jeenu Viswambharan authored 
      

Currently, the dispatcher reads from SCR_EL3 register directly to
determine the EL of SDEI client. This is with the assumption that
SCR_EL3 is not modified throughout. However, with RAS work flows, it's
possible that SCR_EL3 register contains values corresponding to Secure
world, and therefore EL determination can go wrong. To mitigate this,
always read the register from the saved Non-secure context.

Change-Id: Ic85e4021deb18eb58757f676f9a001174998543a
Signed-off-by: default avatarJeenu Viswambharan <jeenu.viswambharan@arm.com>
      2ccfcb2e
    • Jeenu Viswambharan's avatar
      SDEI: Allow platforms to define explicit events · af2c9ecd
      Jeenu Viswambharan authored 
      

The current macros only allow to define dynamic and statically-bound
SDEI events. However, there ought be a mechanism to define SDEI events
that are explicitly dispatched; i.e., events that are dispatched as a
result of a previous secure interrupt or other exception

This patch introduces SDEI_EXPLICIT_EVENT() macro to define an explicit
event. They must be placed under private mappings. Only the priority
flags are allowed to be additionally specified.

Documentation updated.

Change-Id: I2e12f5571381195d6234c9dfbd5904608ad41db3
Signed-off-by: default avatarJeenu Viswambharan <jeenu.viswambharan@arm.com>
      af2c9ecd
  13. 20 Jun, 2018 1 commit
  15. 15 Jun, 2018 1 commit
  17. 14 Jun, 2018 1 commit
    • Roberto Vargas's avatar
      Make TF UUID RFC 4122 compliant · 03364865
      Roberto Vargas authored 
      

RFC4122 defines that fields are stored in network order (big endian),
but TF-A stores them in machine order (little endian by default in TF-A).
We cannot change the future UUIDs that are already generated, but we can store
all the bytes using arrays and modify fiptool to generate the UUIDs with
the correct byte order.

Change-Id: I97be2d3168d91f4dee7ccfafc533ea55ff33e46f
Signed-off-by: default avatarRoberto Vargas <roberto.vargas@arm.com>
      03364865
  19. 13 Jun, 2018 2 commits
    • Antonio Nino Diaz's avatar
      xlat v2: Introduce xlat granule size helpers · a0b9bb79
      Antonio Nino Diaz authored 
      

The function xlat_arch_is_granule_size_supported() can be used to check
if a specific granule size is supported. In Armv8, AArch32 only supports
4 KiB pages. AArch64 supports 4 KiB, 16 KiB or 64 KiB depending on the
implementation, which is detected at runtime.

The function xlat_arch_get_max_supported_granule_size() returns the max
granule size supported by the implementation.

Even though right now they are only used by SPM, they may be useful in
other places in the future. This patch moves the code currently in SPM
to the xlat tables lib so that it can be reused.

Change-Id: If54624a5ecf20b9b9b7f38861b56383a03bbc8a4
Signed-off-by: default avatarAntonio Nino Diaz <antonio.ninodiaz@arm.com>
      a0b9bb79
    • Antonio Nino Diaz's avatar
      SPM: Initialize SP args as expected by cm library · 83a393ba
      Antonio Nino Diaz authored 
      

In the context management library, cm_setup_context() takes the
information in ep_info to fill the registers x0-x7. This patch replaces
the current code that sets them manually by the correct initialization
code.

Change-Id: Id1fdf4681b154026c2e3af1f9b05b19582b7d16d
Signed-off-by: default avatarAntonio Nino Diaz <antonio.ninodiaz@arm.com>
      83a393ba
  21. 08 Jun, 2018 1 commit
  23. 23 May, 2018 5 commits
  25. 15 May, 2018 1 commit
    • Sandrine Bailleux's avatar
      SPM: Do not trap S-EL0 access to SVE/SIMD/FP regs · 39848945
      Sandrine Bailleux authored 
      

This allows secure partitions to access these registers. This is
needed in some cases. For example, it has been reported that in order
to implement secure storage services, a secure partition needs to
encrypt/decrypt some authentication variables, which requires FP/SIMD
support.

Note that SPM will not do any saving/restoring of these registers on
behalf of the SP. This falls under the SP's responsibility.

Also note that if the SP gets preempted, it might not get a chance to
save/restore FP/SIMD registers first. This patch does not address this
problem. It only serves as a temporary solution to unblock development
on the secure partition side.

Change-Id: I3b8ccdebdac0219f6ac96ad66ab2be0be8374ad3
Signed-off-by: default avatarSandrine Bailleux <sandrine.bailleux@arm.com>
      39848945
  27. 17 Apr, 2018 1 commit
  29. 27 Mar, 2018 1 commit
    • Joel Hutton's avatar
      Clean usage of void pointers to access symbols · 9f85f9e3
      Joel Hutton authored 
      

Void pointers have been used to access linker symbols, by declaring an
extern pointer, then taking the address of it. This limits symbols
values to aligned pointer values. To remove this restriction an
IMPORT_SYM macro has been introduced, which declares it as a char
pointer and casts it to the required type.

Change-Id: I89877fc3b13ed311817bb8ba79d4872b89bfd3b0
Signed-off-by: default avatarJoel Hutton <Joel.Hutton@Arm.com>
      9f85f9e3
  31. 26 Mar, 2018 1 commit
  33. 21 Mar, 2018 1 commit
    • Antonio Nino Diaz's avatar
      Rename 'smcc' to 'smccc' · 085e80ec
      Antonio Nino Diaz authored 
      

When the source code says 'SMCC' it is talking about the SMC Calling
Convention. The correct acronym is SMCCC. This affects a few definitions
and file names.

Some files have been renamed (smcc.h, smcc_helpers.h and smcc_macros.S)
but the old files have been kept for compatibility, they include the
new ones with an ERROR_DEPRECATED guard.

Change-Id: I78f94052a502436fdd97ca32c0fe86bd58173f2f
Signed-off-by: default avatarAntonio Nino Diaz <antonio.ninodiaz@arm.com>
      085e80ec
  35. 28 Feb, 2018 1 commit
  37. 27 Feb, 2018 1 commit
    • Jeenu Viswambharan's avatar
      SDEI: Pop dispatch context only after error checking · 8e3032f9
      Jeenu Viswambharan authored 
      

Currently, when the client attempts to do SDEI_EVENT_COMPLETE or
SDEI_EVENT_COMPLETE_AND_RESUME, the dispatcher pops off the outstanding
dispatch context for sanity check. There are however other checks
following this, which could potentially return failure. If that happens,
by popping the context, the dispatcher has inadvertently discarded a
valid context.

This patch fixes this bug by inspecting (not actually popping) the
outstanding context. The context is popped only after all error checks
are completed.

Change-Id: Ie199f6442f871a8177a8247a0c646543bad76d21
Signed-off-by: default avatarJeenu Viswambharan <jeenu.viswambharan@arm.com>
      8e3032f9
  39. 21 Feb, 2018 1 commit
  41. 14 Feb, 2018 1 commit
    • Antonio Nino Diaz's avatar
      Remove URLs from comments · fb1198b1
      Antonio Nino Diaz authored 
      

This fixes all defects according to MISRA Rule 3.1: "The character
sequences /* and // shall not be used within a comment". This affects
all URLs in comments, so they have been removed:

- The link in `sdei_state.c` can also be found in the documentation file
  `docs/sdei.rst`.

- The bug that the file `io_fip.c` talks about doesn't affect the
  currently supported version of GCC, so it doesn't make sense to keep
  the comment. Note that the version of GCC officially supported is the
  one that comes with Linaro Release 17.10, which is GCC 6.2.

- The link in `tzc400.c` was broken, and it didn't correctly direct to
  the Technical Reference Manual it should. The link has been replaced
  by the title of the document, which is more convenient when looking
  for the document.

Change-Id: I89f60c25f635fd4c008a5d3a14028f814c147bbe
Signed-off-by: default avatarAntonio Nino Diaz <antonio.ninodiaz@arm.com>
      fb1198b1
  43. 10 Jan, 2018 1 commit
  45. 08 Jan, 2018 2 commits
  47. 12 Dec, 2017 1 commit
    • Sandrine Bailleux's avatar
      SPM: Fix MM_COMMUNICATE_AARCH32/64 parameters · 4d2787ce
      Sandrine Bailleux authored 
      This partially reverts commit d6b532b5

, keeping only the fixes to
the assertions. The changes related to the order of arguments passed
to the secure partition were not correct and violated the
specification of the SP_EVENT_COMPLETE SMC.

This patch also improves the MM_COMMUNICATE argument validation.  The
cookie argument, as it comes from normal world, can't be trusted and thus
needs to always be validated at run time rather than using an assertion.

Also validate the communication buffer address and return
INVALID_PARAMETER if it is zero, as per the MM specification.

Fix a few typos in comments and use the "secure partition" terminology
rather than "secure payload".

Change-Id: Ice6b7b5494b729dd44611f9a93d362c55ab244f7
Signed-off-by: default avatarSandrine Bailleux <sandrine.bailleux@arm.com>
      4d2787ce
  49. 06 Dec, 2017 3 commits
  51. 05 Dec, 2017 2 commits
  53. 20 Nov, 2017 1 commit