From nobody Tue Apr 16 17:21:24 2024 Delivered-To: importer@patchew.org Received-SPF: none (zoho.com: 192.237.175.120 is neither permitted nor denied by domain of lists.xenproject.org) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; spf=none (zoho.com: 192.237.175.120 is neither permitted nor denied by domain of lists.xenproject.org) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org ARC-Seal: i=1; a=rsa-sha256; t=1559609218; cv=none; d=zoho.com; s=zohoarc; b=KX6gh30UulIM7Jwq3sFWzUjL9WRbg4GLMF78kbGXLSEzsjzzsDKZugyacv0utYPlCSMK4Mx83Sj8qexCYYtDwnBI/MiSaLt4FImmp5hvy2wemFz5AMgk3HtyZXz22ivIKCsAP9vLe0MauezSDMbCf2RpKejggooKoC7YNKWih1E= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1559609218; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:List-Subscribe:List-Post:List-Id:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Sender:Subject:To:ARC-Authentication-Results; bh=DG/LIXQ6mWocAvd1F3ZB8R0wbelZ2WZnUagWkOQnrqg=; b=AJyUdwq/6LJ8FCqlL50J5r7+nwBPd3zUK7nIfbrwqMFCfKL2BmdoYDu0W8r3ye5BHSe44rmkAi5x9zlPVQ4h0kccnj4YeZz4VBIWJ9D8DTAzo6F10JZR4nCWObFljxPVYqu53dH6bj/gLi+RPae0GR2erU6xijo0B0ioPVLd6JY= ARC-Authentication-Results: i=1; mx.zoho.com; spf=none (zoho.com: 192.237.175.120 is neither permitted nor denied by domain of lists.xenproject.org) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Return-Path: Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) by mx.zohomail.com with SMTPS id 1559609218057606.9835466849975; Mon, 3 Jun 2019 17:46:58 -0700 (PDT) Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1hXxZl-0002TA-3f; Tue, 04 Jun 2019 00:45:17 +0000 Received: from us1-rack-dfw2.inumbo.com ([104.130.134.6]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1hXxZj-0002T5-Tk for xen-devel@lists.xenproject.org; Tue, 04 Jun 2019 00:45:15 +0000 Received: from mxnavi-mail.mxnavi.com (unknown [116.90.87.199]) by us1-rack-dfw2.inumbo.com (Halon) with ESMTPS id 025ac852-8662-11e9-8980-bc764e045a96; Tue, 04 Jun 2019 00:45:13 +0000 (UTC) Received: from localhost.localdomain (61.161.186.150) by mxnavi-mail.mxnavi.com (116.90.87.199) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1591.10; Tue, 4 Jun 2019 08:43:00 +0800 X-Inumbo-ID: 025ac852-8662-11e9-8980-bc764e045a96 From: Baodong Chen To: Date: Tue, 4 Jun 2019 08:44:56 +0800 Message-ID: <1559609096-11356-1-git-send-email-chenbaodong@mxnavi.com> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 X-Originating-IP: [61.161.186.150] X-ClientProxiedBy: mxnavi-mail.mxnavi.com (116.90.87.199) To mxnavi-mail.mxnavi.com (116.90.87.199) Subject: [Xen-devel] [PATCH v1] xen: make tracebuffer configurable X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Stefano Stabellini , Wei Liu , Konrad Rzeszutek Wilk , George Dunlap , Andrew Cooper , Ian Jackson , Tim Deegan , Julien Grall , Jan Beulich , Baodong Chen Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" Xen internal running status(trace event) will be saved to trace memory when enabled. trace event data and config params can be read/changed by system control hypercall at run time. Can be disabled for smaller code footprint. Signed-off-by: Baodong Chen --- xen/common/Kconfig | 12 ++++++++++++ xen/common/Makefile | 2 +- xen/include/xen/trace.h | 17 +++++++++++++++++ 3 files changed, 30 insertions(+), 1 deletion(-) diff --git a/xen/common/Kconfig b/xen/common/Kconfig index c838506..3459f56 100644 --- a/xen/common/Kconfig +++ b/xen/common/Kconfig @@ -368,4 +368,16 @@ config DOM0_MEM =20 Leave empty if you are not sure what to specify. =20 +config TRACEBUFFER + bool "Enable trace event logs" if EXPERT =3D "y" + ---help--- + Xen internal running status(trace event) will be saved to trace memory + when enabled. trace event data and config params can be read/changed + by system control hypercall at run time. + + This is used to record xen internal running status. + with a litte performance overhead. + Can be set to 'N' if you dont want this function. + When not configured, 'XEN_STSCTL_tbuf_op' command will result 'ENOSYS'. + endmenu diff --git a/xen/common/Makefile b/xen/common/Makefile index bca48e6..9fd1bd2 100644 --- a/xen/common/Makefile +++ b/xen/common/Makefile @@ -56,7 +56,7 @@ obj-y +=3D sysctl.o obj-y +=3D tasklet.o obj-y +=3D time.o obj-y +=3D timer.o -obj-y +=3D trace.o +obj-$(CONFIG_TRACEBUFFER) +=3D trace.o obj-y +=3D version.o obj-y +=3D virtual_region.o obj-y +=3D vm_event.o diff --git a/xen/include/xen/trace.h b/xen/include/xen/trace.h index 12966ea..da781fa 100644 --- a/xen/include/xen/trace.h +++ b/xen/include/xen/trace.h @@ -21,12 +21,15 @@ #ifndef __XEN_TRACE_H__ #define __XEN_TRACE_H__ =20 +#ifdef CONFIG_TRACEBUFFER extern int tb_init_done; +#endif =20 #include #include #include =20 +#ifdef CONFIG_TRACEBUFFER /* Used to initialise trace buffer functionality */ void init_trace_bufs(void); =20 @@ -47,6 +50,20 @@ static inline void trace_var(u32 event, int cycles, int = extra, void __trace_hypercall(uint32_t event, unsigned long op, const xen_ulong_t *args); =20 +#else +#define tb_init_done false +static inline void init_trace_bufs(void) {} +static inline int tb_control(struct xen_sysctl_tbuf_op *tbc) { return -ENO= SYS; } + +static inline int trace_will_trace_event(uint32_t event) { return 0; } +static inline void trace_var(uint32_t event, int cycles, int extra, + const void *extra_data) {} +static inline void __trace_var(uint32_t event, bool cycles, unsigned int e= xtra, + const void *extra_data) {} +static inline void __trace_hypercall(uint32_t event, unsigned long op, + const xen_ulong_t *args) {} +#endif + /* Convenience macros for calling the trace function. */ #define TRACE_0D(_e) \ do { \ --=20 2.7.4 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel