On Wed, May 21, 2025 at 04:58:42PM +0100, James Clark wrote: > > > On 19/05/2025 10:56 pm, Rob Herring wrote: > > On Mon, May 19, 2025 at 04:06:22PM +0100, Will Deacon wrote: > > > Hey Rob, > > > > > > On Mon, Apr 07, 2025 at 12:41:33PM -0500, Rob Herring (Arm) wrote: > > > > From: Anshuman Khandual <anshuman.khandual@xxxxxxx> > > > > > > > > The ARMv9.2 architecture introduces the optional Branch Record Buffer > > > > Extension (BRBE), which records information about branches as they are > > > > executed into set of branch record registers. BRBE is similar to x86's > > > > Last Branch Record (LBR) and PowerPC's Branch History Rolling Buffer > > > > (BHRB). > > > > > > Since you picked this up from v19, the driver has changed considerably > > > and I presume you will be continuing to extend it in future as the > > > architecture progresses. Perhaps having you listed as Author (and > > > crucially, in git blame :p) with Anshuman as a Co-developed-by: would be > > > more appropriate? > > > > Shrug. > > > > > > --- > > > > drivers/perf/Kconfig | 11 + > > > > drivers/perf/Makefile | 1 + > > > > drivers/perf/arm_brbe.c | 802 +++++++++++++++++++++++++++++++++++++++++++ > > > > drivers/perf/arm_brbe.h | 47 +++ > > > > drivers/perf/arm_pmu.c | 15 +- > > > > drivers/perf/arm_pmuv3.c | 129 ++++++- > > > > include/linux/perf/arm_pmu.h | 8 + > > > > 7 files changed, 1006 insertions(+), 7 deletions(-) > > > > > > Do you know if James Clark's tests [1] are going to be respun for the > > > perf tool? It would be handy to have some way to test this new > > > functionality. > > > > Yes. I dropped them here because I've been told by Arnaldo in the past > > to send userspace stuff separately. > > > > That version of the test was out of date so I've pushed the new version > here: https://git.linaro.org/plugins/gitiles/people/james.clark/linux.git/+/16e4a18c2d5fc53736f05c9052b1d11d74909707 > > But I'll wait for the driver changes to be finalised before posting it. Or > Rob can take it back into the patchset. Thanks, James. I just wanted to make sure that there was still a plan for upstreaming these separately from the driver. Have you had a chance to run them against this v21? Will
