[SRU][PULL][focal:linux-gcp] Patches needed for AmpereOne (arm64)

[John Cabaj]

BugLink: https://bugs.launchpad.net/bugs/2044192

[Impact]

* Google requested patches for AmpereOne machine type

[Fix]

* Cherry-picks from upstream, 1 backport

0147cdcbae07 ("clocksource/drivers/arch_arm_timer: Move workaround synchronisation around")
2332c002702a ("clocksource/drivers/arm_arch_timer: Fix masking for high freq counters")
06376f2f83d3 ("clocksource/drivers/arm_arch_timer: Drop unnecessary ISB on CVAL programming")
e77d93ce7b5f ("clocksource/drivers/arm_arch_timer: Remove any trace of the TVAL programming interface")
0c5b5877372b ("clocksource/drivers/arm_arch_timer: Work around broken CVAL implementations")
a5f7b785133c ("clocksource/drivers/arm_arch_timer: Advertise 56bit timer to the core code")
ae9483c26e4c ("clocksource/drivers/arm_arch_timer: Move MMIO timer programming over to CVAL")
3e84d3142205 ("clocksource/drivers/arm_arch_timer: Fix MMIO base address vs callback ordering issue")
1bd148a112fb ("clocksource/drivers/arm_arch_timer: Move drop _tval from erratum function names")
75a9e056f111 ("clocksource/drivers/arm_arch_timer: Move system register timer programming over to CVAL")
255a1d1d5bcd ("clocksource/drivers/arm_arch_timer: Extend write side of timer register accessors to u64")
882260181a4b ("clocksource/drivers/arm_arch_timer: Drop CNT*_TVAL read accessors")
b125ec94b94f ("clocksource/arm_arch_timer: Add build-time guards for unhandled register accesses")

[Test Case]

* Compile tested
* Boot tested on AmpereOne instance

[Where things could go wrong]

* Low chance of regression. Changes isolated to ARM timers.

[Other Info]

* SF #00372821

-----

The following changes since commit 65112cf684647265473997b8dc2522a3b75a5343:

  UBUNTU: Ubuntu-gcp-5.4.0-1119.128 (2023-11-18 14:50:10 -0300)

are available in the git repository at:

  git+ssh://user@kathleen/home/john-cabaj/for-review/focal_linux-gcp/ ampere_one

for you to fetch changes up to 0147cdcbae0748494735b65df089e3fafbc3a3b0:

  clocksource/drivers/arch_arm_timer: Move workaround synchronisation around (2023-11-27 13:29:30 -0600)

----------------------------------------------------------------
Marc Zyngier (12):
      clocksource/arm_arch_timer: Add build-time guards for unhandled register accesses
      clocksource/drivers/arm_arch_timer: Drop CNT*_TVAL read accessors
      clocksource/drivers/arm_arch_timer: Extend write side of timer register accessors to u64
      clocksource/drivers/arm_arch_timer: Move system register timer programming over to CVAL
      clocksource/drivers/arm_arch_timer: Move drop _tval from erratum function names
      clocksource/drivers/arm_arch_timer: Fix MMIO base address vs callback ordering issue
      clocksource/drivers/arm_arch_timer: Move MMIO timer programming over to CVAL
      clocksource/drivers/arm_arch_timer: Advertise 56bit timer to the core code
      clocksource/drivers/arm_arch_timer: Work around broken CVAL implementations
      clocksource/drivers/arm_arch_timer: Remove any trace of the TVAL programming interface
      clocksource/drivers/arm_arch_timer: Drop unnecessary ISB on CVAL programming
      clocksource/drivers/arch_arm_timer: Move workaround synchronisation around

Oliver Upton (1):
      clocksource/drivers/arm_arch_timer: Fix masking for high freq counters

 arch/arm/include/asm/arch_timer.h    |  37 +++++++++++++---------
 arch/arm64/include/asm/arch_timer.h  |  52 ++++++++++++++----------------
 drivers/clocksource/arm_arch_timer.c | 243 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-------------------------------------------------------
 include/clocksource/arm_arch_timer.h |   2 +-
 4 files changed, 193 insertions(+), 141 deletions(-)