This patch series depends on the following patch:
[U-Boot,v4,03/10] ARM: non-sec: reset CNTVOFF to zero
Before switching to non-secure, make sure that CNTVOFF is set to zero on all CPUs. Otherwise, kernel running in non-secure without HYP enabled (hence using virtual timers) may observe
But we have HYP enabled. In this case why are the series dependent on this patch?
Well, if the HYP is enabled, the host OS will use the Physical timer, and these CNTVOFFs could be cleared in kernel too.
When and where to clear them is better ? In uboot or in kernel when needed?
Thanks,
BRs Xiubo
timers that are not synchronized, effectively seeing time going backward...
Patch work: http://patchwork.ozlabs.org/patch/343084/
Xiubo Li (4): ARM: fix the ARCH Timer frequency setting. ARM: add the pen address byte reverting support. ARM: LS1021A: enable ARMv7 virt support for LS1021A A7 ARM: LS1021A: to allow non-secure R/W access for all devices' mapped region
arch/arm/cpu/armv7/ls102xa/cpu.c | 12 +++ arch/arm/cpu/armv7/nonsec_virt.S | 7 +- arch/arm/include/asm/arch-ls102xa/immap_ls102xa.h | 98 +++++++++++++++++-
board/freescale/ls1021aqds/ls1021aqds.c | 110
+++++++++++++++++++--
board/freescale/ls1021atwr/ls1021atwr.c | 111
++++++++++++++++++++--
include/configs/ls1021aqds.h | 9 ++ include/configs/ls1021atwr.h | 9 ++ 7 files changed, 333 insertions(+), 23 deletions(-)
Diana