[OLK-5.10] 回合社区支持ARMv8.6 arm_arch_timer的补丁

回合社区支持ARMv8.6 arm_arch_timer的补丁

ARMv8.6支持arm_arch_timer为1GHz，但设置定时时间用的寄存器TVAL为32位，这样设置的时间间隔很短，
补丁集将其改为用 CVAL ,该寄存器为 64位

另外在硬件支持 ECV 时，使用自刷新寄存器 SYS_CNTVCTSS_EL0 获取时间，可以少执行一条 isb

clocksource/arm_arch_timer: Add basic ARMv8.6 support
https://patchwork.kernel.org/project/linux-arm-kernel/cover/20211017124225.3018098-1-maz@kernel.org/

| db26f8f2da92 clocksource/drivers/arch_arm_timer: Move workaround synchronisation around
c1153d52c414 clocksource/drivers/arm_arch_timer: Fix masking for high freq counters
 ec8f7f3342c8 clocksource/drivers/arm_arch_timer: Drop unnecessary ISB on CVAL programming
| 41f8d02a6a55 clocksource/drivers/arm_arch_timer: Remove any trace of the TVAL programming interface
| 012f18850452 clocksource/drivers/arm_arch_timer: Work around broken CVAL implementations
| 30aa08da35e0 clocksource/drivers/arm_arch_timer: Advertise 56bit timer to the core code
| 8b82c4f883a7 clocksource/drivers/arm_arch_timer: Move MMIO timer programming over to CVAL
| 72f47a3f0ea4 clocksource/drivers/arm_arch_timer: Fix MMIO base address vs callback ordering issue
| ac9ef4f24cb2 clocksource/drivers/arm_arch_timer: Move drop _tval from erratum function names
| a38b71b0833e clocksource/drivers/arm_arch_timer: Move system register timer programming over to CVAL
| 1e8d929231cf clocksource/drivers/arm_arch_timer: Extend write side of timer register accessors to u64
| d72689988d67 clocksource/drivers/arm_arch_timer: Drop CNT*_TVAL read accessors
| 4775bc63f880 clocksource/arm_arch_timer: Add build-time guards for unhandled register accesses

| fee29f008aa3 arm64: Add HWCAP for self-synchronising virtual counter
 ae976f063b60 arm64: Add handling of CNTVCTSS traps
 9ee840a96042 arm64: Add CNT{P,V}CTSS_EL0 alternatives to cnt{p,v}ct_el0

GVP openEuler/kernel
关闭

内容风险标识

评论 (2)

GVPopenEuler/kernel关闭

内容风险标识