Re: [PATCH] perf: Change PMCR write to read-modify-write

2019-04-02 Thread Will Deacon
[+MarkR] On Wed, Mar 20, 2019 at 07:07:46PM -0700, Prasad Sodagudi wrote: > Preserves the bitfields of PMCR_EL0(AArch64) during PMU reset. > Reset routine should write a 1 to PMCR.C and PMCR.P fields only > to reset the counters. Other fields should not be changed > as they could be set before PMU

Re: [PATCH] perf: Change PMCR write to read-modify-write

2019-04-01 Thread Mark Rutland
On Thu, Mar 21, 2019 at 01:02:27PM -0700, Sodagudi Prasad wrote: > On 2019-03-21 06:34, Julien Thierry wrote: > > Hi Prasad, > > > > On 21/03/2019 02:07, Prasad Sodagudi wrote: > > > Preserves the bitfields of PMCR_EL0(AArch64) during PMU reset. > > > Reset routine should write a 1 to PMCR.C and P

Re: [PATCH] perf: Change PMCR write to read-modify-write

2019-03-22 Thread Julien Thierry
On 21/03/2019 20:02, Sodagudi Prasad wrote: > On 2019-03-21 06:34, Julien Thierry wrote: >> Hi Prasad, >> >> On 21/03/2019 02:07, Prasad Sodagudi wrote: >>> Preserves the bitfields of PMCR_EL0(AArch64) during PMU reset. >>> Reset routine should write a 1 to PMCR.C and PMCR.P fields only >>> to r

Re: [PATCH] perf: Change PMCR write to read-modify-write

2019-03-21 Thread Sodagudi Prasad
On 2019-03-21 06:34, Julien Thierry wrote: Hi Prasad, On 21/03/2019 02:07, Prasad Sodagudi wrote: Preserves the bitfields of PMCR_EL0(AArch64) during PMU reset. Reset routine should write a 1 to PMCR.C and PMCR.P fields only to reset the counters. Other fields should not be changed as they coul

Re: [PATCH] perf: Change PMCR write to read-modify-write

2019-03-21 Thread Julien Thierry
Hi Prasad, On 21/03/2019 02:07, Prasad Sodagudi wrote: > Preserves the bitfields of PMCR_EL0(AArch64) during PMU reset. > Reset routine should write a 1 to PMCR.C and PMCR.P fields only > to reset the counters. Other fields should not be changed > as they could be set before PMU initialization and