From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e7.ny.us.ibm.com (e7.ny.us.ibm.com [32.97.182.137]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 884652C0423 for ; Thu, 6 Mar 2014 11:02:39 +1100 (EST) Received: from /spool/local by e7.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 5 Mar 2014 19:02:37 -0500 Received: from b01cxnp22035.gho.pok.ibm.com (b01cxnp22035.gho.pok.ibm.com [9.57.198.25]) by d01dlp02.pok.ibm.com (Postfix) with ESMTP id 7BF3D6E804A for ; Wed, 5 Mar 2014 19:02:28 -0500 (EST) Received: from d01av01.pok.ibm.com (d01av01.pok.ibm.com [9.56.224.215]) by b01cxnp22035.gho.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id s2602X5f8323390 for ; Thu, 6 Mar 2014 00:02:33 GMT Received: from d01av01.pok.ibm.com (localhost [127.0.0.1]) by d01av01.pok.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id s2602WpB000922 for ; Wed, 5 Mar 2014 19:02:33 -0500 From: Cody P Schafer To: Linux PPC , Cody P Schafer Subject: [PATCH v4 07/11] powerpc/perf: add a shared interface to get gpci version and capabilities Date: Wed, 5 Mar 2014 16:01:06 -0800 Message-Id: <1394064082-6242-8-git-send-email-cody@linux.vnet.ibm.com> In-Reply-To: <1394064082-6242-1-git-send-email-cody@linux.vnet.ibm.com> References: <1394064082-6242-1-git-send-email-cody@linux.vnet.ibm.com> Cc: Peter Zijlstra , LKML , Michael Ellerman , Ingo Molnar , Paul Mackerras , Arnaldo Carvalho de Melo , scottwood@freescale.com List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This exposes a simple way to grab the firmware provided collect_priveliged, ga, expanded, and lab capability bits. All of these bits come in from the same gpci request, so we've exposed all of them. Only the collect_priveliged bit is really used by the hv-gpci/hv-24x7 code, the other bits are simply exposed in sysfs to inform the user. 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 -- 1.9.0