tree da71a35410b0e600e386a739ee7c8baa1525f5c4
parent b1987257827735a36855aec16e30aa8255db0721
author Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com> 1681467976 +0100
committer Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com> 1690446912 +0100

refactor(cpus): convert the Cortex-x2 to use the errata framework

This involves replacing:
 * the reset_func with the standard cpu_reset_func_{start,end} to apply
   errata automatically
 * the <cpu>_errata_report with the errata_report_shim to report errata
   automatically
...and for each erratum:
 * the prologue with the workaround_<type>_start to do the checks and
   framework registration automatically
 * the epilogue with the workaround_<type>_end
 * the checker function with the check_erratum_<type> to make it more
   descriptive

It is important to note that the errata workaround sequences remain
unchanged and preserve their git blame.

Testing was conducted by:
 * Building for release with all errata flags enabled and running script
   in change 19136 to compare output of objdump for each errata.

 * Testing via script was not complete, as it directed to verify the
   check and the workaround functions of few erratas manually.

 * Manual comparison of disassembly of converted functions with non-
   converted functions

   aarch64-none-elf-objdump -D <trusted-firmware-a with conversion>/build/../release/bl31/bl31.elf
     vs
   aarch64-none-elf-objdump -D <trusted-firmware-a clean repo>/build/fvp/release/bl31/bl31.elf

 * Manual comparison of disassembly of both both files(bl31.elf)
   ensured,the ported changes were identical and hence verified.

* Build for release with all errata flags enabled and run default tftf
   tests.

   CROSS_COMPILE=aarch64-none-elf- \
   make PLAT=fvp \
   ARCH=aarch64 \
   DEBUG=0 \
   HW_ASSISTED_COHERENCY=1 \
   USE_COHERENT_MEM=0 \
   CTX_INCLUDE_AARCH32_REGS=0 \
   ERRATA_X2_2002765=1 \
   ERRATA_X2_2017096=1 \
   ERRATA_X2_2058056=1 \
   ERRATA_X2_2081180=1 \
   ERRATA_X2_2083908=1 \
   ERRATA_X2_2147715=1 \
   ERRATA_X2_2216384=1 \
   ERRATA_X2_2282622=1 \
   ERRATA_X2_2371105=1 \
   ERRATA_X2_2768515=1 \
   WORKAROUND_CVE_2022_23960=1 \
   ERRATA_DSU_2313941=1 \
   BL33=/home/jaychi01/tf_a/tf-a-tests/build/fvp/release/tftf.bin \
   fip all -j12

 * Build for debug with all errata enabled and step through ArmDS
   at reset to ensure that if Errata are applicable then the workaround
   functions are entered precisely.

Change-Id: Icd2268cdf27f41240c92e3df23b5ad22f3ce3124
Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>