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  1. 05 Sep, 2018 2 commits
    • Varun Wadekar's avatar
      cpus: denver: Implement static workaround for CVE-2018-3639 · 6cf8d65f
      Varun Wadekar authored 
      

For Denver CPUs, this approach enables the mitigation during EL3
initialization, following every PE reset. No mechanism is provided to
disable the mitigation at runtime.

This approach permanently mitigates the EL3 software stack only. Other
software components are responsible to enable it for their exception
levels.

TF-A implements this approach for the Denver CPUs with DENVER_MIDR_PN3
and earlier:

*   By setting bit 11 (Disable speculative store buffering) of
    `ACTLR_EL3`

*   By setting bit 9 (Disable speculative memory disambiguation) of
    `ACTLR_EL3`

TF-A implements this approach for the Denver CPUs with DENVER_MIDR_PN4
and later:

*   By setting bit 18 (Disable speculative store buffering) of
    `ACTLR_EL3`

*   By setting bit 17 (Disable speculative memory disambiguation) of
    `ACTLR_EL3`

Change-Id: If1de96605ce3f7b0aff5fab2c828e5aecb687555
Signed-off-by: default avatarVarun Wadekar <vwadekar@nvidia.com>
      6cf8d65f
    • Varun Wadekar's avatar
      cpus: denver: reset power state to 'C1' on boot · cf3ed0dc
      Varun Wadekar authored 
      

Denver CPUs expect the power state field to be reset to 'C1'
during boot. This patch updates the reset handler to reset the
ACTLR_.PMSTATE field to 'C1' state during CPU boot.

Change-Id: I7cb629627a4dd1a30ec5cbb3a5e90055244fe30c
Signed-off-by: default avatarVarun Wadekar <vwadekar@nvidia.com>
      cf3ed0dc
  3. 30 Aug, 2018 2 commits
    • Jan Dabros's avatar
      AARCH64: Fix credentials for ERXMISC0_EL1 and ERXMISC1_EL1 · 30125eab
      Jan Dabros authored 
      

fixes arm-software/tf-issues#620
Signed-off-by: default avatarJan Dabros <jsd@semihalf.com>
      30125eab
    • Douglas Raillard's avatar
      backtrace: Introduce backtrace function · 0c62883f
      Douglas Raillard authored 
      

This function diplays the backtrace, the current EL and security state
to allow a post-processing tool to choose the right binary to interpret
the dump.

The output can be fed to GNU addr2line to resolve function names given
an ELF binary compiled with debug information. The "-i" flag is
recommended to improve display in case of inlined functions. The *.dump
files generated during the build process can also be used.

The function works in AArch64 and AArch32. In AArch32 it only works in
A32 mode (without T32 interworking), which is enforced in the Makefile.

Sample output of a backtrace at EL3:

    BACKTRACE: START: function_name
    0: EL3: 0x798
    1: EL3: 0x538
    2: EL3: 0x550
    3: EL3: 0x55c
    4: EL3: 0x568
    5: EL3: 0x5a8
    6: EL3: 0xf4
    BACKTRACE: END: function_name

In order to enable it the new option ENABLE_BACKTRACE must be set to 1.
This option is set to 1 by default only in AArch64 debug builds. As
usual, it can be overridden by the platform makefile and in the build
command line.

Change-Id: Icaff39b0e5188329728be2f3c72b868b2368e794
Co-authored-by: default avatarAntonio Nino Diaz <antonio.ninodiaz@arm.com>
Signed-off-by: default avatarAntonio Nino Diaz <antonio.ninodiaz@arm.com>
Signed-off-by: default avatarDouglas Raillard <douglas.raillard@arm.com>
      0c62883f
  5. 22 Aug, 2018 9 commits
  7. 20 Aug, 2018 3 commits
    • Jeenu Viswambharan's avatar
      RAS: MISRA fixes · 30a8d96e
      Jeenu Viswambharan authored 
      

These changes address most of the required MISRA rules. In the process,
some from generic code is also fixed.

No functional changes.

Change-Id: I76cacf6e1d73b09510561b5090c2bb66d81bec88
Signed-off-by: default avatarJeenu Viswambharan <jeenu.viswambharan@arm.com>
      30a8d96e
    • Jeenu Viswambharan's avatar
      SDEI: MISRA fixes · ba6e5ca6
      Jeenu Viswambharan authored 
      

These changes address most of the required MISRA rules. In the process,
some from generic code is also fixed.

No functional changes.

Change-Id: I6235a355e006f0b1c7c1c4d811b3964a64d0434f
Signed-off-by: default avatarJeenu Viswambharan <jeenu.viswambharan@arm.com>
      ba6e5ca6
    • Jeenu Viswambharan's avatar
      AArch64: Enable MPAM for lower ELs · 5f835918
      Jeenu Viswambharan authored 
      

Memory Partitioning And Monitoring is an Armv8.4 feature that enables
various memory system components and resources to define partitions.
Software running at various ELs can then assign themselves to the
desired partition to control their performance aspects.

With this patch, when ENABLE_MPAM_FOR_LOWER_ELS is set to 1, EL3 allows
lower ELs to access their own MPAM registers without trapping to EL3.
This patch however doesn't make use of partitioning in EL3; platform
initialisation code should configure and use partitions in EL3 if
required.

Change-Id: I5a55b6771ccaa0c1cffc05543d2116b60cbbcdcd
Co-authored-by: default avatarJames Morse <james.morse@arm.com>
Signed-off-by: default avatarJeenu Viswambharan <jeenu.viswambharan@arm.com>
      5f835918
  9. 17 Aug, 2018 1 commit
  11. 10 Aug, 2018 1 commit
    • Antonio Nino Diaz's avatar
      xlat v2: Support the EL2 translation regime · 1a92a0e0
      Antonio Nino Diaz authored 
      

The translation library is useful elsewhere. Even though this repository
doesn't exercise the EL2 support of the library, it is better to have it
here as well to make it easier to maintain.

enable_mmu_secure() and enable_mmu_direct() have been deprecated. The
functions are still present, but they are behind ERROR_DEPRECATED and
they call the new functions enable_mmu_svc_mon() and
enable_mmu_direct_svc_mon().

Change-Id: I13ad10cd048d9cc2d55e0fff9a5133671b67dcba
Signed-off-by: default avatarAntonio Nino Diaz <antonio.ninodiaz@arm.com>
      1a92a0e0
  13. 06 Aug, 2018 1 commit
  15. 03 Aug, 2018 1 commit
  17. 02 Aug, 2018 1 commit
  19. 01 Aug, 2018 1 commit
  21. 30 Jul, 2018 1 commit
  23. 24 Jul, 2018 1 commit
  25. 20 Jul, 2018 6 commits
  27. 19 Jul, 2018 1 commit
    • Jeenu Viswambharan's avatar
      RAS: Introduce handler for Uncontainable errors · b56dc2a9
      Jeenu Viswambharan authored 
      

Uncontainable errors are the most severe form of errors, which typically
mean that the system state can't be trusted any more. This further means
that normal error recovery process can't be followed, and an orderly
shutdown of the system is often desirable.

This patch allows for the platform to define a handler for Uncontainable
errors received. Due to the nature of Uncontainable error, the handler
is expected to initiate an orderly shutdown of the system, and therefore
is not expected to return. A default implementation is added which falls
back to platform unhandled exception.

Also fix ras_arch.h header guards.

Change-Id: I072e336a391a0b382e77e627eb9e40729d488b55
Signed-off-by: default avatarJeenu Viswambharan <jeenu.viswambharan@arm.com>
      b56dc2a9
  29. 18 Jul, 2018 4 commits
  31. 15 Jul, 2018 2 commits
  33. 13 Jul, 2018 2 commits
    • Antonio Nino Diaz's avatar
      xlat v2: Turn MMU parameters into 64-bit values · 6563c0be
      Antonio Nino Diaz authored 
      

Most registers are 64-bit wide, even in AArch32 mode:

- MAIR_ELx is equivalent to MAIR0 and MAIR1.
- TTBR is 64 bit in both AArch64 and AArch32.

The only difference is the TCR register, which is 32 bit in AArch32 and
in EL3 in AArch64. For consistency with the rest of ELs in AArch64, it
makes sense to also have it as a 64-bit value.

Change-Id: I2274d66a28876702e7085df5f8aad0e7ec139da9
Signed-off-by: default avatarAntonio Nino Diaz <antonio.ninodiaz@arm.com>
      6563c0be
    • Antonio Nino Diaz's avatar
      xlat v2: Remove IMAGE_EL define · aa1d5f60
      Antonio Nino Diaz authored 
      

The Exception Level is now detected at runtime. This means that it is not
needed to hardcode the EL used by each image.

This doesn't result in a substantial increase of the image size because
the initialization functions that aren't used are garbage-collected by
the linker.

In AArch32 the current EL has been changed from EL3 to EL1 because the
the AArch32 PL1&0 translation regime behaves more like the AArch64 EL1&0
translation regime than the EL3 one.

Change-Id: I941404299ebe7666ca17619207c923b49a55cb73
Signed-off-by: default avatarAntonio Nino Diaz <antonio.ninodiaz@arm.com>
      aa1d5f60
  35. 11 Jul, 2018 1 commit