From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752182AbeECKTH (ORCPT ); Thu, 3 May 2018 06:19:07 -0400 Received: from mga06.intel.com ([134.134.136.31]:65500 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751652AbeECKTB (ORCPT ); Thu, 3 May 2018 06:19:01 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.49,358,1520924400"; d="scan'208";a="36546431" From: Luwei Kang To: kvm@vger.kernel.org Cc: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, x86@kernel.org, pbonzini@redhat.com, rkrcmar@redhat.com, linux-kernel@vger.kernel.org, joro@8bytes.org, peterz@infradead.org, chao.p.peng@linux.intel.com, Luwei Kang Subject: [PATCH v7 02/13] perf/x86/intel/pt: Change pt_cap_get() to a public function Date: Thu, 3 May 2018 20:13:17 +0800 Message-Id: <1525349608-10352-3-git-send-email-luwei.kang@intel.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1525349608-10352-1-git-send-email-luwei.kang@intel.com> References: <1525349608-10352-1-git-send-email-luwei.kang@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Chao Peng Change pt_cap_get() to a public function that KVM can access this function to check if specific feature is supported on hardware. Signed-off-by: Chao Peng Signed-off-by: Luwei Kang --- arch/x86/events/intel/pt.c | 3 ++- arch/x86/events/intel/pt.h | 21 --------------------- arch/x86/include/asm/intel_pt.h | 23 +++++++++++++++++++++++ 3 files changed, 25 insertions(+), 22 deletions(-) diff --git a/arch/x86/events/intel/pt.c b/arch/x86/events/intel/pt.c index 81fd41d..a5a7e44 100644 --- a/arch/x86/events/intel/pt.c +++ b/arch/x86/events/intel/pt.c @@ -75,7 +75,7 @@ PT_CAP(psb_periods, 1, CPUID_EBX, 0xffff0000), }; -static u32 pt_cap_get(enum pt_capabilities cap) +u32 pt_cap_get(enum pt_capabilities cap) { struct pt_cap_desc *cd = &pt_caps[cap]; u32 c = pt_pmu.caps[cd->leaf * PT_CPUID_REGS_NUM + cd->reg]; @@ -83,6 +83,7 @@ static u32 pt_cap_get(enum pt_capabilities cap) return (c & cd->mask) >> shift; } +EXPORT_SYMBOL_GPL(pt_cap_get); static ssize_t pt_cap_show(struct device *cdev, struct device_attribute *attr, diff --git a/arch/x86/events/intel/pt.h b/arch/x86/events/intel/pt.h index 0050ca1..269e15a 100644 --- a/arch/x86/events/intel/pt.h +++ b/arch/x86/events/intel/pt.h @@ -45,30 +45,9 @@ struct topa_entry { u64 rsvd4 : 16; }; -#define PT_CPUID_LEAVES 2 -#define PT_CPUID_REGS_NUM 4 /* number of regsters (eax, ebx, ecx, edx) */ - /* TSC to Core Crystal Clock Ratio */ #define CPUID_TSC_LEAF 0x15 -enum pt_capabilities { - PT_CAP_max_subleaf = 0, - PT_CAP_cr3_filtering, - PT_CAP_psb_cyc, - PT_CAP_ip_filtering, - PT_CAP_mtc, - PT_CAP_ptwrite, - PT_CAP_power_event_trace, - PT_CAP_topa_output, - PT_CAP_topa_multiple_entries, - PT_CAP_single_range_output, - PT_CAP_payloads_lip, - PT_CAP_num_address_ranges, - PT_CAP_mtc_periods, - PT_CAP_cycle_thresholds, - PT_CAP_psb_periods, -}; - struct pt_pmu { struct pmu pmu; u32 caps[PT_CPUID_REGS_NUM * PT_CPUID_LEAVES]; diff --git a/arch/x86/include/asm/intel_pt.h b/arch/x86/include/asm/intel_pt.h index b523f51..4270421 100644 --- a/arch/x86/include/asm/intel_pt.h +++ b/arch/x86/include/asm/intel_pt.h @@ -2,10 +2,33 @@ #ifndef _ASM_X86_INTEL_PT_H #define _ASM_X86_INTEL_PT_H +#define PT_CPUID_LEAVES 2 +#define PT_CPUID_REGS_NUM 4 /* number of regsters (eax, ebx, ecx, edx) */ + +enum pt_capabilities { + PT_CAP_max_subleaf = 0, + PT_CAP_cr3_filtering, + PT_CAP_psb_cyc, + PT_CAP_ip_filtering, + PT_CAP_mtc, + PT_CAP_ptwrite, + PT_CAP_power_event_trace, + PT_CAP_topa_output, + PT_CAP_topa_multiple_entries, + PT_CAP_single_range_output, + PT_CAP_payloads_lip, + PT_CAP_num_address_ranges, + PT_CAP_mtc_periods, + PT_CAP_cycle_thresholds, + PT_CAP_psb_periods, +}; + #if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_CPU_SUP_INTEL) void cpu_emergency_stop_pt(void); +extern u32 pt_cap_get(enum pt_capabilities cap); #else static inline void cpu_emergency_stop_pt(void) {} +static inline u32 pt_cap_get(enum pt_capabilities cap) { return 0; } #endif #endif /* _ASM_X86_INTEL_PT_H */ -- 1.8.3.1