RE: [PATCH v7 4/4] perf/smmuv3: Enable HiSilicon Erratum 162001800 quirk

2019-04-04 Thread Shameerali Kolothum Thodi
Guohanjun (Hanjun Guo) ; > John Garry ; pa...@codeaurora.org; > vkil...@codeaurora.org; rruig...@codeaurora.org; linux-a...@vger.kernel.org; > linux-kernel@vger.kernel.org; linux-arm-ker...@lists.infradead.org; Linuxarm > ; neil.m.lee...@gmail.com > Subject: Re: [PATCH v7 4/4] p

Re: [PATCH v7 4/4] perf/smmuv3: Enable HiSilicon Erratum 162001800 quirk

2019-04-04 Thread Will Deacon
On Tue, Mar 26, 2019 at 03:17:53PM +, Shameer Kolothum wrote: > HiSilicon erratum 162001800 describes the limitation of > SMMUv3 PMCG implementation on HiSilicon Hip08 platforms. > > On these platforms, the PMCG event counter registers > (SMMU_PMCG_EVCNTRn) are read only and as a result it >

Re: [PATCH v7 4/4] perf/smmuv3: Enable HiSilicon Erratum 162001800 quirk

2019-04-04 Thread Lorenzo Pieralisi
On Tue, Mar 26, 2019 at 03:17:53PM +, Shameer Kolothum wrote: > HiSilicon erratum 162001800 describes the limitation of > SMMUv3 PMCG implementation on HiSilicon Hip08 platforms. > > On these platforms, the PMCG event counter registers > (SMMU_PMCG_EVCNTRn) are read only and as a result it >

Re: [PATCH v7 4/4] perf/smmuv3: Enable HiSilicon Erratum 162001800 quirk

2019-04-04 Thread Will Deacon
On Tue, Mar 26, 2019 at 03:17:53PM +, Shameer Kolothum wrote: > HiSilicon erratum 162001800 describes the limitation of > SMMUv3 PMCG implementation on HiSilicon Hip08 platforms. > > On these platforms, the PMCG event counter registers > (SMMU_PMCG_EVCNTRn) are read only and as a result it >