From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932633Ab2JBXy5 (ORCPT ); Tue, 2 Oct 2012 19:54:57 -0400 Received: from mga14.intel.com ([143.182.124.37]:60113 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756805Ab2JBXs7 (ORCPT ); Tue, 2 Oct 2012 19:48:59 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.80,525,1344236400"; d="scan'208";a="199832067" From: Andi Kleen To: linux-kernel@vger.kernel.org Cc: acme@redhat.com, x86@vger.kernel.org, eranian@google.com, jolsa@redhat.com, a.p.zijlstra@chello.nl, Andi Kleen , avi@redhat.com Subject: [PATCH 06/31] perf, kvm: Support the intx/intx_cp modifiers in KVM arch perfmon emulation Date: Tue, 2 Oct 2012 16:48:26 -0700 Message-Id: <1349221731-15665-7-git-send-email-andi@firstfloor.org> X-Mailer: git-send-email 1.7.7.6 In-Reply-To: <1349221731-15665-1-git-send-email-andi@firstfloor.org> References: <1349221731-15665-1-git-send-email-andi@firstfloor.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Andi Kleen This is not arch perfmon, but older CPUs will just ignore it. This makes it possible to do at least some TSX measurements from a KVM guest Cc: avi@redhat.com Signed-off-by: Andi Kleen --- arch/x86/kvm/pmu.c | 13 ++++++++++--- 1 files changed, 10 insertions(+), 3 deletions(-) diff --git a/arch/x86/kvm/pmu.c b/arch/x86/kvm/pmu.c index 9b7ec11..f72a409 100644 --- a/arch/x86/kvm/pmu.c +++ b/arch/x86/kvm/pmu.c @@ -160,7 +160,7 @@ static void stop_counter(struct kvm_pmc *pmc) static void reprogram_counter(struct kvm_pmc *pmc, u32 type, unsigned config, bool exclude_user, bool exclude_kernel, - bool intr) + bool intr, bool intx, bool intx_cp) { struct perf_event *event; struct perf_event_attr attr = { @@ -173,6 +173,11 @@ static void reprogram_counter(struct kvm_pmc *pmc, u32 type, .exclude_kernel = exclude_kernel, .config = config, }; + /* Will be ignored on CPUs that don't support this. */ + if (intx) + attr.config |= HSW_INTX; + if (intx_cp) + attr.config |= HSW_INTX_CHECKPOINTED; attr.sample_period = (-pmc->counter) & pmc_bitmask(pmc); @@ -239,7 +244,9 @@ static void reprogram_gp_counter(struct kvm_pmc *pmc, u64 eventsel) reprogram_counter(pmc, type, config, !(eventsel & ARCH_PERFMON_EVENTSEL_USR), !(eventsel & ARCH_PERFMON_EVENTSEL_OS), - eventsel & ARCH_PERFMON_EVENTSEL_INT); + eventsel & ARCH_PERFMON_EVENTSEL_INT, + !!(eventsel & HSW_INTX), + !!(eventsel & HSW_INTX_CHECKPOINTED)); } static void reprogram_fixed_counter(struct kvm_pmc *pmc, u8 en_pmi, int idx) @@ -256,7 +263,7 @@ static void reprogram_fixed_counter(struct kvm_pmc *pmc, u8 en_pmi, int idx) arch_events[fixed_pmc_events[idx]].event_type, !(en & 0x2), /* exclude user */ !(en & 0x1), /* exclude kernel */ - pmi); + pmi, false, false); } static inline u8 fixed_en_pmi(u64 ctrl, int idx) -- 1.7.7.6