Re: [PATCH] arm64: kernel: initialize broadcast hrtimer based clock event device

2014-05-30 Thread Preeti U Murthy
On 05/29/2014 06:09 PM, Mark Rutland wrote: Hi Preeti, On Thu, May 29, 2014 at 12:04:36PM +0100, Preeti U Murthy wrote: Hi Lorenzo, On 05/29/2014 02:53 PM, Lorenzo Pieralisi wrote: On platforms implementing CPU power management, the CPUidle subsystem can allow CPUs to enter idle states

[PATCH] arm64: kernel: initialize broadcast hrtimer based clock event device

2014-05-29 Thread Lorenzo Pieralisi
On platforms implementing CPU power management, the CPUidle subsystem can allow CPUs to enter idle states where local timers logic is lost on power down. To keep the software timers functional the kernel relies on an always-on broadcast timer to be present in the platform to relay the interrupt

Re: [PATCH] arm64: kernel: initialize broadcast hrtimer based clock event device

2014-05-29 Thread Will Deacon
On Thu, May 29, 2014 at 10:23:01AM +0100, Lorenzo Pieralisi wrote: On platforms implementing CPU power management, the CPUidle subsystem can allow CPUs to enter idle states where local timers logic is lost on power down. To keep the software timers functional the kernel relies on an always-on

Re: [PATCH] arm64: kernel: initialize broadcast hrtimer based clock event device

2014-05-29 Thread Preeti U Murthy
Hi Lorenzo, On 05/29/2014 02:53 PM, Lorenzo Pieralisi wrote: On platforms implementing CPU power management, the CPUidle subsystem can allow CPUs to enter idle states where local timers logic is lost on power down. To keep the software timers functional the kernel relies on an always-on

Re: [PATCH] arm64: kernel: initialize broadcast hrtimer based clock event device

2014-05-29 Thread Mark Rutland
Hi Preeti, On Thu, May 29, 2014 at 12:04:36PM +0100, Preeti U Murthy wrote: Hi Lorenzo, On 05/29/2014 02:53 PM, Lorenzo Pieralisi wrote: On platforms implementing CPU power management, the CPUidle subsystem can allow CPUs to enter idle states where local timers logic is lost on power

Re: [PATCH] arm64: kernel: initialize broadcast hrtimer based clock event device

2014-05-29 Thread Lorenzo Pieralisi
Hi Preeti, On Thu, May 29, 2014 at 12:04:36PM +0100, Preeti U Murthy wrote: Hi Lorenzo, On 05/29/2014 02:53 PM, Lorenzo Pieralisi wrote: On platforms implementing CPU power management, the CPUidle subsystem can allow CPUs to enter idle states where local timers logic is lost on power

Re: [PATCH] arm64: kernel: initialize broadcast hrtimer based clock event device

2014-05-29 Thread Lorenzo Pieralisi
this: -- 8 -- Subject: [PATCH] arm64: kernel: initialize broadcast hrtimer based clock event device On platforms implementing CPU power management, the CPUidle subsystem can allow CPUs to enter idle states where local timers logic is lost on power down. To keep the software timers functional

Re: [PATCH] arm64: kernel: initialize broadcast hrtimer based clock event device

2014-05-29 Thread Mark Rutland
by default with which is unconditionally registered in case no suitable hardware device is present? How about this: -- 8 -- Subject: [PATCH] arm64: kernel: initialize broadcast hrtimer based clock event device On platforms implementing CPU power management, the CPUidle subsystem can