Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753300AbaBYDfG (ORCPT ); Mon, 24 Feb 2014 22:35:06 -0500 Received: from ozlabs.org ([203.10.76.45]:52051 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752992AbaBYDd3 (ORCPT ); Mon, 24 Feb 2014 22:33:29 -0500 In-Reply-To: <1392415338-16288-8-git-send-email-cody@linux.vnet.ibm.com> To: Cody P Schafer , Linux PPC From: Michael Ellerman Cc: LKML , Peter Zijlstra , Paul Mackerras , Arnaldo Carvalho de Melo , Ingo Molnar , Benjamin Herrenschmidt Subject: Re: [PATCH v2 07/11] powerpc: add a shared interface to get gpci version and capabilities Message-Id: <20140225033328.C5A9E2C0324@ozlabs.org> Date: Tue, 25 Feb 2014 14:33:28 +1100 (EST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [PATCH v2 07/11] powerpc: add a shared interface to get gpci version and capabilities All the patches that touch perf should be "powerpc/perf: foo" On Fri, 2014-14-02 at 22:02:11 UTC, Cody P Schafer wrote: > ... I realise this is a fairly small patch but a changelog is still nice. You could for example mention that we don't currently use .ga, .expanded or .lab but we're adding the logic anyway because ... > Signed-off-by: Cody P Schafer > --- > arch/powerpc/perf/hv-common.c | 39 +++++++++++++++++++++++++++++++++++++++ > arch/powerpc/perf/hv-common.h | 17 +++++++++++++++++ > 2 files changed, 56 insertions(+) > create mode 100644 arch/powerpc/perf/hv-common.c > create mode 100644 arch/powerpc/perf/hv-common.h > > diff --git a/arch/powerpc/perf/hv-common.c b/arch/powerpc/perf/hv-common.c > new file mode 100644 > index 0000000..47e02b3 > --- /dev/null > +++ b/arch/powerpc/perf/hv-common.c > @@ -0,0 +1,39 @@ > +#include > +#include > + > +#include "hv-gpci.h" > +#include "hv-common.h" > + > +unsigned long hv_perf_caps_get(struct hv_perf_caps *caps) > +{ > + unsigned long r; > + struct p { > + struct hv_get_perf_counter_info_params params; > + struct cv_system_performance_capabilities caps; > + } __packed __aligned(sizeof(uint64_t)); > + > + struct p arg = { > + .params = { > + .counter_request = cpu_to_be32( > + CIR_SYSTEM_PERFORMANCE_CAPABILITIES), > + .starting_index = cpu_to_be32(-1), > + .counter_info_version_in = 0, > + } > + }; > + > + r = plpar_hcall_norets(H_GET_PERF_COUNTER_INFO, > + virt_to_phys(&arg), sizeof(arg)); > + > + if (r) > + return r; > + > + pr_devel("capability_mask: 0x%x\n", arg.caps.capability_mask); > + > + caps->version = arg.params.counter_info_version_out; > + caps->collect_privileged = !!arg.caps.perf_collect_privileged; > + caps->ga = !!(arg.caps.capability_mask & CV_CM_GA); > + caps->expanded = !!(arg.caps.capability_mask & CV_CM_EXPANDED); > + caps->lab = !!(arg.caps.capability_mask & CV_CM_LAB); > + > + return r; > +} > diff --git a/arch/powerpc/perf/hv-common.h b/arch/powerpc/perf/hv-common.h > new file mode 100644 > index 0000000..7e615bd > --- /dev/null > +++ b/arch/powerpc/perf/hv-common.h > @@ -0,0 +1,17 @@ > +#ifndef LINUX_POWERPC_PERF_HV_COMMON_H_ > +#define LINUX_POWERPC_PERF_HV_COMMON_H_ > + > +#include > + > +struct hv_perf_caps { > + u16 version; > + u16 collect_privileged:1, > + ga:1, > + expanded:1, > + lab:1, > + unused:12; > +}; > + > +unsigned long hv_perf_caps_get(struct hv_perf_caps *caps); > + > +#endif > -- > 1.8.5.4 > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/