Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751767AbdFISES (ORCPT ); Fri, 9 Jun 2017 14:04:18 -0400 Received: from mail.kernel.org ([198.145.29.99]:36084 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751535AbdFISER (ORCPT ); Fri, 9 Jun 2017 14:04:17 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B958223966 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=goodmis.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=rostedt@goodmis.org Date: Fri, 9 Jun 2017 14:04:13 -0400 From: Steven Rostedt To: Vitaly Kuznetsov Cc: devel@linuxdriverproject.org, x86@kernel.org, linux-kernel@vger.kernel.org, "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Jork Loeser , Simon Xiao , Andy Lutomirski , Andy Shevchenko Subject: Re: [PATCH v8 10/10] tracing/hyper-v: trace hyperv_mmu_flush_tlb_others() Message-ID: <20170609140413.7e7ba9e3@gandalf.local.home> In-Reply-To: <20170609132736.13699-11-vkuznets@redhat.com> References: <20170609132736.13699-1-vkuznets@redhat.com> <20170609132736.13699-11-vkuznets@redhat.com> X-Mailer: Claws Mail 3.14.0 (GTK+ 2.24.31; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3582 Lines: 113 On Fri, 9 Jun 2017 15:27:36 +0200 Vitaly Kuznetsov wrote: > Add Hyper-V tracing subsystem and trace hyperv_mmu_flush_tlb_others(). > Tracing is done the same way we do xen_mmu_flush_tlb_others(). > > Signed-off-by: Vitaly Kuznetsov > --- > MAINTAINERS | 1 + > arch/x86/hyperv/mmu.c | 7 +++++++ > arch/x86/include/asm/trace/hyperv.h | 38 +++++++++++++++++++++++++++++++++++++ > 3 files changed, 46 insertions(+) > create mode 100644 arch/x86/include/asm/trace/hyperv.h > > diff --git a/MAINTAINERS b/MAINTAINERS > index e3f44fd..001614b 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -6168,6 +6168,7 @@ M: Stephen Hemminger > L: devel@linuxdriverproject.org > S: Maintained > F: arch/x86/include/asm/mshyperv.h > +F: arch/x86/include/asm/trace/hyperv.h > F: arch/x86/include/uapi/asm/hyperv.h > F: arch/x86/kernel/cpu/mshyperv.c > F: arch/x86/hyperv > diff --git a/arch/x86/hyperv/mmu.c b/arch/x86/hyperv/mmu.c > index 0712111..cb35453 100644 > --- a/arch/x86/hyperv/mmu.c > +++ b/arch/x86/hyperv/mmu.c > @@ -8,6 +8,9 @@ > #include > #include > > +#define CREATE_TRACE_POINTS > +#include > + > /* HvFlushVirtualAddressSpace, HvFlushVirtualAddressList hypercalls */ > struct hv_flush_pcpu { > u64 address_space; > @@ -103,6 +106,8 @@ static void hyperv_flush_tlb_others(const struct cpumask *cpus, > u64 status = U64_MAX; > unsigned long flags; > > + trace_hyperv_mmu_flush_tlb_others(cpus, mm, start, end); > + > if (!pcpu_flush || !hv_hypercall_pg) > goto do_native; > > @@ -172,6 +177,8 @@ static void hyperv_flush_tlb_others_ex(const struct cpumask *cpus, > u64 status = U64_MAX; > unsigned long flags; > > + trace_hyperv_mmu_flush_tlb_others(cpus, mm, start, end); > + > if (!pcpu_flush_ex || !hv_hypercall_pg) > goto do_native; > > diff --git a/arch/x86/include/asm/trace/hyperv.h b/arch/x86/include/asm/trace/hyperv.h > new file mode 100644 > index 0000000..e44ece1 > --- /dev/null > +++ b/arch/x86/include/asm/trace/hyperv.h > @@ -0,0 +1,38 @@ > +#undef TRACE_SYSTEM > +#define TRACE_SYSTEM hyperv > + > +#if !defined(_TRACE_HYPERV_H) || defined(TRACE_HEADER_MULTI_READ) > +#define _TRACE_HYPERV_H > + > +#include > + > +#if IS_ENABLED(CONFIG_HYPERV) Hmm, this is new to me. I know you can use IS_ENABLED() inside C code, but I've never seen it used for preprocessor directives. This usually is just: #ifdef CONFIG_HYPERV Other than that, this looks fine to me. -- Steve > + > +TRACE_EVENT(hyperv_mmu_flush_tlb_others, > + TP_PROTO(const struct cpumask *cpus, struct mm_struct *mm, > + unsigned long addr, unsigned long end), > + TP_ARGS(cpus, mm, addr, end), > + TP_STRUCT__entry( > + __field(unsigned int, ncpus) > + __field(struct mm_struct *, mm) > + __field(unsigned long, addr) > + __field(unsigned long, end) > + ), > + TP_fast_assign(__entry->ncpus = cpumask_weight(cpus); > + __entry->mm = mm; > + __entry->addr = addr, > + __entry->end = end), > + TP_printk("ncpus %d mm %p addr %lx, end %lx", > + __entry->ncpus, __entry->mm, __entry->addr, __entry->end) > + ); > + > +#endif /* CONFIG_HYPERV */ > + > +#undef TRACE_INCLUDE_PATH > +#define TRACE_INCLUDE_PATH asm/trace/ > +#undef TRACE_INCLUDE_FILE > +#define TRACE_INCLUDE_FILE hyperv > +#endif /* _TRACE_HYPERV_H */ > + > +/* This part must be outside protection */ > +#include