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  1. 09 Jun, 2020 1 commit
    • Varun Wadekar's avatar
      cpus: denver: disable cycle counter when event counting is prohibited · c5c1af0d
      Varun Wadekar authored 
      

The Denver CPUs implement support for PMUv3 for ARMv8.1 and expect the
PMCR_EL0 to be saved in non-secure context.

This patch disables cycle counter when event counting is prohibited
immediately on entering the secure world to avoid leaking useful
information about the PMU counters. The context saving code later
saves the value of PMCR_EL0 to the non-secure world context.

Verified with 'PMU Leakage' test suite.

 ******************************* Summary *******************************
 > Test suite 'PMU Leakage'
                                                                 Passed
 =================================
 Tests Skipped : 2
 Tests Passed  : 2
 Tests Failed  : 0
 Tests Crashed : 0
 Total tests   : 4
 =================================
Signed-off-by: default avatarVarun Wadekar <vwadekar@nvidia.com>
Change-Id: I3675e2b99b44ed23d86e29a5af1b496e80324875
      c5c1af0d
  3. 01 Jun, 2020 2 commits
  5. 09 Mar, 2020 1 commit
  7. 20 Feb, 2020 1 commit
    • Varun Wadekar's avatar
      cpus: higher performance non-cacheable load forwarding · cd0ea184
      Varun Wadekar authored 
      

The CPUACTLR_EL1 register on Cortex-A57 CPUs supports a bit to enable
non-cacheable streaming enhancement. Platforms can set this bit only
if their memory system meets the requirement that cache line fill
requests from the Cortex-A57 processor are atomic.

This patch adds support to enable higher performance non-cacheable load
forwarding for such platforms. Platforms must enable this support by
setting the 'A57_ENABLE_NONCACHEABLE_LOAD_FWD' flag from their
makefiles. This flag is disabled by default.

Change-Id: Ib27e55dd68d11a50962c0bbc5b89072208b4bac5
Signed-off-by: default avatarVarun Wadekar <vwadekar@nvidia.com>
      cd0ea184
  9. 18 Feb, 2020 2 commits
  11. 27 Jan, 2020 1 commit
  13. 22 Jan, 2020 1 commit
  15. 23 Dec, 2019 1 commit
  17. 24 Oct, 2019 1 commit
  19. 04 Oct, 2019 1 commit
    • laurenw-arm's avatar
      Neoverse N1 Errata Workaround 1542419 · 80942622
      laurenw-arm authored 
      

Coherent I-cache is causing a prefetch violation where when the core
executes an instruction that has recently been modified, the core might
fetch a stale instruction which violates the ordering of instruction
fetches.

The workaround includes an instruction sequence to implementation
defined registers to trap all EL0 IC IVAU instructions to EL3 and a trap
handler to execute a TLB inner-shareable invalidation to an arbitrary
address followed by a DSB.
Signed-off-by: default avatarLauren Wehrmeister <lauren.wehrmeister@arm.com>
Change-Id: Ic3b7cbb11cf2eaf9005523ef5578a372593ae4d6
      80942622
  21. 03 Oct, 2019 1 commit
  23. 02 Oct, 2019 1 commit
  25. 30 Sep, 2019 1 commit
  27. 11 Sep, 2019 1 commit
  29. 19 Aug, 2019 1 commit
  31. 16 Aug, 2019 1 commit
    • Alexei Fedorov's avatar
      FVP_Base_AEMv8A platform: Fix cache maintenance operations · ef430ff4
      Alexei Fedorov authored 
      

This patch fixes FVP_Base_AEMv8A model hang issue with
ARMv8.4+ with cache modelling enabled configuration.
Incorrect L1 cache flush operation to PoU, using CLIDR_EL1
LoUIS field, which is required by the architecture to be
zero for ARMv8.4-A with ARMv8.4-S2FWB feature is replaced
with L1 to L2 and L2 to L3 (if L3 is present) cache flushes.
FVP_Base_AEMv8A model can be configured with L3 enabled by
setting `cluster0.l3cache-size` and `cluster1.l3cache-size`
to non-zero values, and presence of L3 is checked in
`aem_generic_core_pwr_dwn` function by reading
CLIDR_EL1.Ctype3 field value.

Change-Id: If3de3d4eb5ed409e5b4ccdbc2fe6d5a01894a9af
Signed-off-by: default avatarAlexei Fedorov <Alexei.Fedorov@arm.com>
      ef430ff4
  33. 31 Jul, 2019 1 commit
  35. 16 Jul, 2019 1 commit
  37. 10 Jul, 2019 1 commit
  39. 02 Jul, 2019 10 commits
  41. 11 Jun, 2019 1 commit
  43. 06 Jun, 2019 2 commits
  45. 04 Jun, 2019 1 commit
    • John Tsichritzis's avatar
      Apply compile-time check for AArch64-only cores · 629d04f5
      John Tsichritzis authored 
      

Some cores support only AArch64 mode. In those cores, only a limited
subset of the AArch32 system registers are implemented. Hence, if TF-A
is supposed to run on AArch64-only cores, it must be compiled with
CTX_INCLUDE_AARCH32_REGS=0.

Currently, the default settings for compiling TF-A are with the AArch32
system registers included. So, if we compile TF-A the default way and
attempt to run it on an AArch64-only core, we only get a runtime panic.

Now a compile-time check has been added to ensure that this flag has the
appropriate value when AArch64-only cores are included in the build.

Change-Id: I298ec550037fafc9347baafb056926d149197d4c
Signed-off-by: default avatarJohn Tsichritzis <john.tsichritzis@arm.com>
      629d04f5
  47. 28 May, 2019 1 commit
  49. 24 May, 2019 1 commit
    • Alexei Fedorov's avatar
      Add support for Branch Target Identification · 9fc59639
      Alexei Fedorov authored 
      

This patch adds the functionality needed for platforms to provide
Branch Target Identification (BTI) extension, introduced to AArch64
in Armv8.5-A by adding BTI instruction used to mark valid targets
for indirect branches. The patch sets new GP bit [50] to the stage 1
Translation Table Block and Page entries to denote guarded EL3 code
pages which will cause processor to trap instructions in protected
pages trying to perform an indirect branch to any instruction other
than BTI.
BTI feature is selected by BRANCH_PROTECTION option which supersedes
the previous ENABLE_PAUTH used for Armv8.3-A Pointer Authentication
and is disabled by default. Enabling BTI requires compiler support
and was tested with GCC versions 9.0.0, 9.0.1 and 10.0.0.
The assembly macros and helpers are modified to accommodate the BTI
instruction.
This is an experimental feature.
Note. The previous ENABLE_PAUTH build option to enable PAuth in EL3
is now made as an internal flag and BRANCH_PROTECTION flag should be
used instead to enable Pointer Authentication.
Note. USE_LIBROM=1 option is currently not supported.

Change-Id: Ifaf4438609b16647dc79468b70cd1f47a623362e
Signed-off-by: default avatarAlexei Fedorov <Alexei.Fedorov@arm.com>
      9fc59639
  51. 14 May, 2019 1 commit
  53. 07 May, 2019 2 commits