From mboxrd@z Thu Jan 1 00:00:00 1970 From: jan.glauber@caviumnetworks.com (Jan Glauber) Date: Thu, 18 Feb 2016 19:28:50 +0100 Subject: [PATCH v4 4/5] arm64/perf: Enable PMCR long cycle counter bit In-Reply-To: <20160218173428.GE16883@arm.com> References: <467597048eda3004bd69f1fbe3981aab111e00dd.1455810755.git.jglauber@cavium.com> <20160218173428.GE16883@arm.com> Message-ID: <20160218182850.GC16782@hardcore> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Thu, Feb 18, 2016 at 05:34:28PM +0000, Will Deacon wrote: > On Thu, Feb 18, 2016 at 05:50:13PM +0100, Jan Glauber wrote: > > With the long cycle counter bit (LC) disabled the cycle counter is not > > working on ThunderX SOC (ThunderX only implements Aarch64). > > Also, according to documentation LC == 0 is deprecated. > > > > To keep the code simple the patch does not introduce 64 bit wide counter > > functions. Instead writing the cycle counter always sets the upper > > 32 bits so overflow interrupts are generated as before. > > > > Original patch from Andrew Pinksi > > What does this mean? Do we need Andrew's S-o-B, or is this a fresh patch? > > Will I've modified Andrew's patch. I assumed his formal S-o-B is not required. Please correct me if I'm wrong. Jan