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  1. 07 Apr, 2021 1 commit
    • Max Shvetsov's avatar
      Fix: Remove save/restore of EL2 timer registers · a7cf2743
      Max Shvetsov authored 
      

Since there is a secure and non-secure version of the timer registers
there is no need to preserve their context in EL3.
With that, following registers were removed from EL3 save/restore
routine:
	cnthps_ctl_el2
	cnthps_tval_el2
	cnthps_cval_el2
	cnthvs_ctl_el2
	cnthvs_tval_el2
	cnthvs_cval_el2
	cnthp_ctl_el2
	cnthp_cval_el2
	cnthp_tval_el2
	cnthv_ctl_el2
	cnthv_cval_el2
	cnthv_tval_el2
Signed-off-by: default avatarMax Shvetsov <maksims.svecovs@arm.com>
Change-Id: I6e2fc09c74a7375c4fccc11f12af4e39e6dc616b
      a7cf2743
  3. 31 Mar, 2021 1 commit
  5. 24 Mar, 2021 2 commits
  7. 10 Mar, 2021 1 commit
  9. 01 Mar, 2021 1 commit
  11. 25 Feb, 2021 1 commit
  13. 15 Feb, 2021 1 commit
    • Andre Przywara's avatar
      plat/arm: juno: Condition Juno entropy source with CRC instructions · eb18ce32
      Andre Przywara authored 
      

The Juno Trusted Entropy Source has a bias, which makes the generated
raw numbers fail a FIPS 140-2 statistic test.

To improve the quality of the numbers, we can use the CPU's CRC
instructions, which do a decent job on conditioning the bits.

This adds a *very* simple version of arm_acle.h, which is typically
provided by the compiler, and contains the CRC instrinsics definitions
we need. We need the original version by using -nostdinc.

Change-Id: I83d3e6902d6a1164aacd5060ac13a38f0057bd1a
Signed-off-by: default avatarAndre Przywara <andre.przywara@arm.com>
      eb18ce32
  15. 03 Feb, 2021 4 commits
  17. 29 Jan, 2021 1 commit
    • Madhukar Pappireddy's avatar
      Fix exception handlers in BL31: Use DSB to synchronize pending EA · c2d32a5f
      Madhukar Pappireddy authored 
      For SoCs which do not implement RAS, use DSB as a barrier to
synchronize pending external aborts at the entry and exit of
exception handlers. This is needed to isolate the SErrors to
appropriate context.

However, this introduces an unintended side effect as discussed
in the https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/3440


A summary of the side effect and a quick workaround is provided as
part of this patch and summarized here:

The explicit DSB at the entry of various exception vectors in BL31
for handling exceptions from lower ELs can inadvertently trigger an
SError exception in EL3 due to pending asyncrhonouus aborts in lower
ELs. This will end up being handled by serror_sp_elx in EL3 which will
ultimately panic and die.

The way to workaround is to update a flag to indicate if the exception
truly came from EL3. This flag is allocated in the cpu_context
structure. This is not a bullet proof solution to the problem at hand
because we assume the instructions following "isb" that help to update
the flag (lines 100-102 & 139-141) execute without causing further
exceptions.

Change-Id: I4d345b07d746a727459435ddd6abb37fda24a9bf
Signed-off-by: default avatarMadhukar Pappireddy <madhukar.pappireddy@arm.com>
      c2d32a5f
  19. 13 Jan, 2021 1 commit
  21. 12 Jan, 2021 1 commit
  23. 30 Nov, 2020 1 commit
  25. 12 Nov, 2020 2 commits
  27. 15 Oct, 2020 1 commit
  29. 12 Oct, 2020 1 commit
    • Jimmy Brisson's avatar
      Increase type widths to satisfy width requirements · d7b5f408
      Jimmy Brisson authored 
      

Usually, C has no problem up-converting types to larger bit sizes. MISRA
rule 10.7 requires that you not do this, or be very explicit about this.
This resolves the following required rule:

    bl1/aarch64/bl1_context_mgmt.c:81:[MISRA C-2012 Rule 10.7 (required)]<None>
    The width of the composite expression "0U | ((mode & 3U) << 2U) | 1U |
    0x3c0U" (32 bits) is less that the right hand operand
    "18446744073709547519ULL" (64 bits).

This also resolves MISRA defects such as:

    bl2/aarch64/bl2arch_setup.c:18:[MISRA C-2012 Rule 12.2 (required)]
    In the expression "3U << 20", shifting more than 7 bits, the number
    of bits in the essential type of the left expression, "3U", is
    not allowed.

Further, MISRA requires that all shifts don't overflow. The definition of
PAGE_SIZE was (1U << 12), and 1U is 8 bits. This caused about 50 issues.
This fixes the violation by changing the definition to 1UL << 12. Since
this uses 32bits, it should not create any issues for aarch32.

This patch also contains a fix for a build failure in the sun50i_a64
platform. Specifically, these misra fixes removed a single and
instruction,

    92407e73        and     x19, x19, #0xffffffff

from the cm_setup_context function caused a relocation in
psci_cpus_on_start to require a linker-generated stub. This increased the
size of the .text section and caused an alignment later on to go over a
page boundary and round up to the end of RAM before placing the .data
section. This sectionn is of non-zero size and therefore causes a link
error.

The fix included in this reorders the functions during link time
without changing their ording with respect to alignment.

Change-Id: I76b4b662c3d262296728a8b9aab7a33b02087f16
Signed-off-by: default avatarJimmy Brisson <jimmy.brisson@arm.com>
      d7b5f408
  31. 09 Oct, 2020 1 commit
  33. 07 Oct, 2020 1 commit
  35. 05 Oct, 2020 2 commits
  37. 02 Oct, 2020 1 commit
    • Andre Przywara's avatar
      libfdt: Upgrade libfdt source files · 3b456661
      Andre Przywara authored 
      

Update the libfdt source files, the upstream commit is 73e0f143b73d
("libfdt: fdt_strerror(): Fix comparison warning").

This brings us the fixes for the signed/unsigned comparison warnings,
so platforms can enable -Wsign-compare now.

Change-Id: I303d891c82ffea0acefdde27289339db5ac5a289
Signed-off-by: default avatarAndre Przywara <andre.przywara@arm.com>
      3b456661
  39. 28 Sep, 2020 1 commit
  41. 25 Sep, 2020 2 commits
  43. 18 Sep, 2020 1 commit
  45. 11 Sep, 2020 1 commit
  47. 09 Sep, 2020 1 commit
  49. 03 Sep, 2020 1 commit
  51. 02 Sep, 2020 1 commit
    • Pramod Kumar's avatar
      lib: cpu: Check SCU presence in DSU before accessing DSU registers · 942013e1
      Pramod Kumar authored 
      

The DSU contains system control registers in the SCU and L3 logic to
control the functionality of the cluster. If "DIRECT CONNECT" L3
memory system variant is used, there won't be any L3 cache,
snoop filter, and SCU logic present hence no system control register
will be present. Hence check SCU presence before accessing DSU register
for DSU_936184 errata.
Signed-off-by: default avatarPramod Kumar <pramod.kumar@broadcom.com>
Change-Id: I1ffa8afb0447ae3bd1032c9dd678d68021fe5a63
      942013e1
  53. 31 Aug, 2020 1 commit
  55. 18 Aug, 2020 1 commit
  57. 14 Aug, 2020 1 commit
    • Jimmy Brisson's avatar
      Prevent colliding identifiers · d74c6b83
      Jimmy Brisson authored 
      

There was a collision between the name of the typedef in the CASSERT and
something else, so we make the name of the typedef unique to the
invocation of DEFFINE_SVC_UUID2 by appending the name that's passed into
the macro. This eliminates the following MISRA violation:

    bl1/bl1_main.c:233:[MISRA C-2012 Rule 5.6 (required)] Identifier
    "invalid_svc_uuid" is already used to represent a typedef.

This also resolves MISRA rule 5.9.

These renamings are as follows:
  * tzram -> secram. This matches the function call name as it has
  sec_mem in it's  name
  * fw_config_base -> config_base. This file does not mess with
  hw_conig, so there's little chance of confusion

Change-Id: I8734ba0956140c8e29b89d0596d10d61a6ef351e
Signed-off-by: default avatarJimmy Brisson <jimmy.brisson@arm.com>
      d74c6b83
  59. 10 Aug, 2020 1 commit
    • Alexei Fedorov's avatar
      TF-A AMU extension: fix detection of group 1 counters. · f3ccf036
      Alexei Fedorov authored 
      

This patch fixes the bug when AMUv1 group1 counters was
always assumed being implemented without checking for its
presence which was causing exception otherwise.
The AMU extension code was also modified as listed below:
- Added detection of AMUv1 for ARMv8.6
- 'PLAT_AMU_GROUP1_NR_COUNTERS' build option is removed and
number of group1 counters 'AMU_GROUP1_NR_COUNTERS' is now
calculated based on 'AMU_GROUP1_COUNTERS_MASK' value
- Added bit fields definitions and access functions for
AMCFGR_EL0/AMCFGR and AMCGCR_EL0/AMCGCR registers
- Unification of amu.c Aarch64 and Aarch32 source files
- Bug fixes and TF-A coding style compliant changes.

Change-Id: I14e407be62c3026ebc674ec7045e240ccb71e1fb
Signed-off-by: default avatarAlexei Fedorov <Alexei.Fedorov@arm.com>
      f3ccf036
  61. 09 Aug, 2020 1 commit
  63. 23 Jul, 2020 2 commits