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

[Tim Gardner]

On 11/30/23 7:32 AM, John Cabaj wrote:
> 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(-)
> 
Acked-by: Tim Gardner <tim.gardner at canonical.com>

Clean cherry picks except for one simple backport [6/13].
-- 
-----------
Tim Gardner
Canonical, Inc