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Tue, 30 Jun 2020 14:34:47 +0200 (CEST) Received: from belindir.nask.net.pl ([127.0.0.1]) by localhost (belindir.nask.net.pl [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id iRG1SBdsY0N9; Tue, 30 Jun 2020 14:34:42 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by belindir.nask.net.pl (Postfix) with ESMTP id 559AA225E5; Tue, 30 Jun 2020 14:34:42 +0200 (CEST) Received: from belindir.nask.net.pl ([127.0.0.1]) by localhost (belindir.nask.net.pl [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id ohvGC64yklKc; Tue, 30 Jun 2020 14:34:42 +0200 (CEST) Received: from mq-desktop.cert.pl (unknown [195.187.238.217]) by belindir.nask.net.pl (Postfix) with ESMTPSA id 2E61F2252B; Tue, 30 Jun 2020 14:34:42 +0200 (CEST) X-Inumbo-ID: 36959ab3-bace-11ea-8610-12813bfff9fa X-Amavis-Alert: BAD HEADER SECTION, Duplicate header field: "References" X-Virus-Scanned: amavisd-new at bagnar.nask.net.pl X-Amavis-Alert: BAD HEADER SECTION, Duplicate header field: "References" X-Amavis-Alert: BAD HEADER SECTION, Duplicate header field: "References" X-Quarantine-ID: X-Virus-Scanned: amavisd-new at belindir.nask.net.pl X-Amavis-Alert: BAD HEADER SECTION, Duplicate header field: "References" From: =?UTF-8?q?Micha=C5=82=20Leszczy=C5=84ski?= To: xen-devel@lists.xenproject.org Subject: [PATCH v4 09/10] tools/libxc: add xc_vmtrace_* functions Date: Tue, 30 Jun 2020 14:33:52 +0200 Message-Id: <03c751efa273bf2a2b1575b0175219577da42e39.1593519420.git.michal.leszczynski@cert.pl> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: tamas.lengyel@intel.com, Michal Leszczynski , luwei.kang@intel.com, Ian Jackson , Wei Liu Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Michal Leszczynski Add functions in libxc that use the new XEN_DOMCTL_vmtrace interface. Signed-off-by: Michal Leszczynski Acked-by: Wei Liu --- tools/libxc/Makefile | 1 + tools/libxc/include/xenctrl.h | 39 +++++++++++++++++++ tools/libxc/xc_vmtrace.c | 73 +++++++++++++++++++++++++++++++++++ 3 files changed, 113 insertions(+) create mode 100644 tools/libxc/xc_vmtrace.c diff --git a/tools/libxc/Makefile b/tools/libxc/Makefile index fae5969a73..605e44501d 100644 --- a/tools/libxc/Makefile +++ b/tools/libxc/Makefile @@ -27,6 +27,7 @@ CTRL_SRCS-y +=3D xc_csched2.c CTRL_SRCS-y +=3D xc_arinc653.c CTRL_SRCS-y +=3D xc_rt.c CTRL_SRCS-y +=3D xc_tbuf.c +CTRL_SRCS-y +=3D xc_vmtrace.c CTRL_SRCS-y +=3D xc_pm.c CTRL_SRCS-y +=3D xc_cpu_hotplug.c CTRL_SRCS-y +=3D xc_resume.c diff --git a/tools/libxc/include/xenctrl.h b/tools/libxc/include/xenctrl.h index 113ddd935d..66966f6c17 100644 --- a/tools/libxc/include/xenctrl.h +++ b/tools/libxc/include/xenctrl.h @@ -1585,6 +1585,45 @@ int xc_tbuf_set_cpu_mask(xc_interface *xch, xc_cpuma= p_t mask); =20 int xc_tbuf_set_evt_mask(xc_interface *xch, uint32_t mask); =20 +/** + * Enable processor trace for given vCPU in given DomU. + * Allocate the trace ringbuffer with given size. + * + * @parm xch a handle to an open hypervisor interface + * @parm domid domain identifier + * @parm vcpu vcpu identifier + * @return 0 on success, -1 on failure + */ +int xc_vmtrace_pt_enable(xc_interface *xch, uint32_t domid, + uint32_t vcpu); + +/** + * Disable processor trace for given vCPU in given DomU. + * Deallocate the trace ringbuffer. + * + * @parm xch a handle to an open hypervisor interface + * @parm domid domain identifier + * @parm vcpu vcpu identifier + * @return 0 on success, -1 on failure + */ +int xc_vmtrace_pt_disable(xc_interface *xch, uint32_t domid, + uint32_t vcpu); + +/** + * Get current offset inside the trace ringbuffer. + * This allows to determine how much data was written into the buffer. + * Once buffer overflows, the offset will reset to 0 and the previous + * data will be overriden. + * + * @parm xch a handle to an open hypervisor interface + * @parm domid domain identifier + * @parm vcpu vcpu identifier + * @parm offset current offset inside trace buffer will be written there + * @return 0 on success, -1 on failure + */ +int xc_vmtrace_pt_get_offset(xc_interface *xch, uint32_t domid, + uint32_t vcpu, uint64_t *offset); + int xc_domctl(xc_interface *xch, struct xen_domctl *domctl); int xc_sysctl(xc_interface *xch, struct xen_sysctl *sysctl); =20 diff --git a/tools/libxc/xc_vmtrace.c b/tools/libxc/xc_vmtrace.c new file mode 100644 index 0000000000..32f90a6203 --- /dev/null +++ b/tools/libxc/xc_vmtrace.c @@ -0,0 +1,73 @@ +/*************************************************************************= ***** + * xc_vmtrace.c + * + * API for manipulating hardware tracing features + * + * Copyright (c) 2020, Michal Leszczynski + * + * Copyright 2020 CERT Polska. All rights reserved. + * Use is subject to license terms. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; + * version 2.1 of the License. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; If not, see . + */ + +#include "xc_private.h" +#include + +int xc_vmtrace_pt_enable( + xc_interface *xch, uint32_t domid, uint32_t vcpu) +{ + DECLARE_DOMCTL; + int rc; + + domctl.cmd =3D XEN_DOMCTL_vmtrace_op; + domctl.domain =3D domid; + domctl.u.vmtrace_op.cmd =3D XEN_DOMCTL_vmtrace_pt_enable; + domctl.u.vmtrace_op.vcpu =3D vcpu; + + rc =3D do_domctl(xch, &domctl); + return rc; +} + +int xc_vmtrace_pt_get_offset( + xc_interface *xch, uint32_t domid, uint32_t vcpu, uint64_t *offset) +{ + DECLARE_DOMCTL; + int rc; + + domctl.cmd =3D XEN_DOMCTL_vmtrace_op; + domctl.domain =3D domid; + domctl.u.vmtrace_op.cmd =3D XEN_DOMCTL_vmtrace_pt_get_offset; + domctl.u.vmtrace_op.vcpu =3D vcpu; + + rc =3D do_domctl(xch, &domctl); + if ( !rc ) + *offset =3D domctl.u.vmtrace_op.offset; + return rc; +} + +int xc_vmtrace_pt_disable(xc_interface *xch, uint32_t domid, uint32_t vcpu) +{ + DECLARE_DOMCTL; + int rc; + + domctl.cmd =3D XEN_DOMCTL_vmtrace_op; + domctl.domain =3D domid; + domctl.u.vmtrace_op.cmd =3D XEN_DOMCTL_vmtrace_pt_disable; + domctl.u.vmtrace_op.vcpu =3D vcpu; + + rc =3D do_domctl(xch, &domctl); + return rc; +} + --=20 2.20.1