Message ID | 20190809160047.8319-18-alazar@bitdefender.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
Return-Path: <owner-linux-mm@kvack.org> Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D05F06C5 for <patchwork-linux-mm@patchwork.kernel.org>; Fri, 9 Aug 2019 16:01:44 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BC51020072 for <patchwork-linux-mm@patchwork.kernel.org>; Fri, 9 Aug 2019 16:01:44 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id ACCF5200DF; Fri, 9 Aug 2019 16:01:44 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 21B5520072 for <patchwork-linux-mm@patchwork.kernel.org>; Fri, 9 Aug 2019 16:01:44 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id F12326B026D; Fri, 9 Aug 2019 12:01:00 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id EC40E6B0270; Fri, 9 Aug 2019 12:01:00 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B17576B026F; Fri, 9 Aug 2019 12:01:00 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from mail-wr1-f72.google.com (mail-wr1-f72.google.com [209.85.221.72]) by kanga.kvack.org (Postfix) with ESMTP id 4A9E36B026F for <linux-mm@kvack.org>; Fri, 9 Aug 2019 12:01:00 -0400 (EDT) Received: by mail-wr1-f72.google.com with SMTP id k10so4065694wru.23 for <linux-mm@kvack.org>; Fri, 09 Aug 2019 09:01:00 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-original-authentication-results:x-gm-message-state:from:to:cc :subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=PGaLYSew8Jfr9ke/l8cNnme6xmXde0bNuA83fL+q+mA=; b=Obzx/F85x8ttunpYjNz4qKx/ez9gh9NIRYgl3Ia+87+R7+5b/6EmdNuP4DV/C34YbR JusMIdw82rEt1NvYiIKy6+q+qb9d5ISjluKHHyAH4Ra3xn61h1vpTcRr/PFizXmlZdrY Jc1mNAl7PWEf/h7xcvLKebip4JHFLopKpqu6cDxpwMp3xW4/lHm0CXdPnuztQe9OTi0w UcJRVHIIgwXrbzPREwGNJ0cWvB0mY6OWVdpvsjAbRqKfd8hhtJlLwiwr8MiLKYuTaHXv qoZdcZIvSykiycvh99+iC2O5u6Nrlj8Mz2vRXqeqSPqVa6+6zKa1ZvGtSmWcn5CUkncp qWrQ== X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of alazar@bitdefender.com designates 91.199.104.161 as permitted sender) smtp.mailfrom=alazar@bitdefender.com X-Gm-Message-State: APjAAAUvWVckpJEja8i3Dp/uIAKGMiwKSzVS4DVkWscav0UZ1+F4O/XG UxTw8nCz4vb1x4Yn3+X3Be3oj1N0uZgJLyvxphjMl3S0N80CnDaticzXWcaXcQBShPypxbzoYqe tJHQz8Kq4GH5rQrEnFD2OZDGum/IuYYM3CYlGZ76Sb/5sUi1f5kgFBsdIJqpkcFujsA== X-Received: by 2002:a5d:4492:: with SMTP id j18mr22118338wrq.53.1565366459890; Fri, 09 Aug 2019 09:00:59 -0700 (PDT) X-Google-Smtp-Source: APXvYqxoXHKFtFT7qMztoveGT3FAlui7Ei06H3YUUAf2OGqX/MnE7MrfMA2zh6xuNeKuTmF8vfLL X-Received: by 2002:a5d:4492:: with SMTP id j18mr22118268wrq.53.1565366459040; Fri, 09 Aug 2019 09:00:59 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1565366459; cv=none; d=google.com; s=arc-20160816; b=fAsamf+1yPP0QzsZzP0SA2xlZRUEFFfwv+8dd7luf7OLDxkA5sTvfLtvVEiutwqRJ0 x2B7GI36kpKv1S8xxzwPssHKSjKFO1J1xX2wGK99uLwFQmXHTepYRcldV+Wj1uZXU53j 46b6nWbpSysSrMfXM7UmFiYVJCKiV6bw/umskzaByt+v4DSbKmCokyqtmqDyqe6b7lN5 XDn6YgsGZgGY1/QjKhbap/Thso+vtH9UEyz1/17lJdWKcbj6oJfBt9rzr6BdYJhqNat9 d4HwfUyAJn13ljIX7BoUvxKDb+8xa5UO/+/ohxe3vJUzReQLhqNto/ZZ0xo/TQe77A9W Ka7w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from; bh=PGaLYSew8Jfr9ke/l8cNnme6xmXde0bNuA83fL+q+mA=; b=Ff+4gqqm6S4jz+FLoXiJaih3OHm06dP44a5SlhVGpNZF2a9uji03aQlja9Ui+bsa9U i4nEYt3cAOM24sdt3pbaUK8NTIKsMIfbPY21JICoBIJbOqowo700nHBCDwx2Zl08Dlvf IIKHgL4sifxtcGa33aY/VQWSgNdhOPVQvidUJ+kGjry9zJAeszmjjWi+UUN5FQ1hkHmi tfFVLL8wVCPZNHBq6IICS/GmLmSnfGQCmqAWAt4eycff6ouF2EMM2hQT6UYsdWKgaKml X4b1hWB6xza0rLtk4F8qz/HFK5QZ0tgAxSc3r608ALQd5v93kBhwXQwI5JDpjGBcqNf6 NW3A== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of alazar@bitdefender.com designates 91.199.104.161 as permitted sender) smtp.mailfrom=alazar@bitdefender.com Received: from mx01.bbu.dsd.mx.bitdefender.com (mx01.bbu.dsd.mx.bitdefender.com. [91.199.104.161]) by mx.google.com with ESMTPS id y13si8316632wrp.174.2019.08.09.09.00.58 for <linux-mm@kvack.org> (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 09 Aug 2019 09:00:59 -0700 (PDT) Received-SPF: pass (google.com: domain of alazar@bitdefender.com designates 91.199.104.161 as permitted sender) client-ip=91.199.104.161; Authentication-Results: mx.google.com; spf=pass (google.com: domain of alazar@bitdefender.com designates 91.199.104.161 as permitted sender) smtp.mailfrom=alazar@bitdefender.com Received: from smtp.bitdefender.com (smtp02.buh.bitdefender.net [10.17.80.76]) by mx01.bbu.dsd.mx.bitdefender.com (Postfix) with ESMTPS id 57BB6305D3D8; Fri, 9 Aug 2019 19:00:58 +0300 (EEST) Received: from localhost.localdomain (unknown [89.136.169.210]) by smtp.bitdefender.com (Postfix) with ESMTPSA id 1301E305B7A4; Fri, 9 Aug 2019 19:00:58 +0300 (EEST) From: =?utf-8?q?Adalbert_Laz=C4=83r?= <alazar@bitdefender.com> To: kvm@vger.kernel.org Cc: linux-mm@kvack.org, virtualization@lists.linux-foundation.org, Paolo Bonzini <pbonzini@redhat.com>, =?utf-8?b?UmFkaW0gS3LEjW3DocWZ?= <rkrcmar@redhat.com>, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>, Tamas K Lengyel <tamas@tklengyel.com>, Mathieu Tarral <mathieu.tarral@protonmail.com>, =?utf-8?q?Samuel_Laur=C3=A9?= =?utf-8?q?n?= <samuel.lauren@iki.fi>, Patrick Colp <patrick.colp@oracle.com>, Jan Kiszka <jan.kiszka@siemens.com>, Stefan Hajnoczi <stefanha@redhat.com>, Weijiang Yang <weijiang.yang@intel.com>, Zhang@kvack.org, Yu C <yu.c.zhang@intel.com>, =?utf-8?q?Mihai_Don=C8=9Bu?= <mdontu@bitdefender.com>, =?utf-8?q?Adalbert_L?= =?utf-8?q?az=C4=83r?= <alazar@bitdefender.com> Subject: [RFC PATCH v6 17/92] kvm: introspection: introduce event actions Date: Fri, 9 Aug 2019 18:59:32 +0300 Message-Id: <20190809160047.8319-18-alazar@bitdefender.com> In-Reply-To: <20190809160047.8319-1-alazar@bitdefender.com> References: <20190809160047.8319-1-alazar@bitdefender.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: <linux-mm.kvack.org> X-Virus-Scanned: ClamAV using ClamSMTP |
Series |
VM introspection
|
expand
|
diff --git a/Documentation/virtual/kvm/kvmi.rst b/Documentation/virtual/kvm/kvmi.rst index e7d9a3816e00..1ea4be0d5a45 100644 --- a/Documentation/virtual/kvm/kvmi.rst +++ b/Documentation/virtual/kvm/kvmi.rst @@ -482,4 +482,14 @@ with two common structures:: __u32 padding2; }; +All events accept the KVMI_EVENT_ACTION_CRASH action, which stops the +guest ungracefully but as soon as possible. + +Most of the events accept the KVMI_EVENT_ACTION_CONTINUE action, which +lets the instruction that caused the event to continue (unless specified +otherwise). + +Some of the events accept the KVMI_EVENT_ACTION_RETRY action, to continue +by re-entering the guest. + Specific data can follow these common structures. diff --git a/include/uapi/linux/kvmi.h b/include/uapi/linux/kvmi.h index dda2ae352611..ccf2239b5db4 100644 --- a/include/uapi/linux/kvmi.h +++ b/include/uapi/linux/kvmi.h @@ -66,6 +66,10 @@ enum { KVMI_NUM_EVENTS }; +#define KVMI_EVENT_ACTION_CONTINUE 0 +#define KVMI_EVENT_ACTION_RETRY 1 +#define KVMI_EVENT_ACTION_CRASH 2 + #define KVMI_MSG_SIZE (4096 - sizeof(struct kvmi_msg_hdr)) struct kvmi_msg_hdr { diff --git a/kernel/signal.c b/kernel/signal.c index 57b7771e20d7..9befbfaaa710 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -1413,6 +1413,7 @@ int kill_pid_info(int sig, struct kernel_siginfo *info, struct pid *pid) */ } } +EXPORT_SYMBOL(kill_pid_info); static int kill_proc_info(int sig, struct kernel_siginfo *info, pid_t pid) { diff --git a/virt/kvm/kvmi.c b/virt/kvm/kvmi.c index 3cc7bb035796..0d3560b74f2d 100644 --- a/virt/kvm/kvmi.c +++ b/virt/kvm/kvmi.c @@ -511,6 +511,46 @@ void kvmi_destroy_vm(struct kvm *kvm) wait_for_completion_killable(&kvm->kvmi_completed); } +static int kvmi_vcpu_kill(int sig, struct kvm_vcpu *vcpu) +{ + int err = -ESRCH; + struct pid *pid; + struct kernel_siginfo siginfo[1] = {}; + + rcu_read_lock(); + pid = rcu_dereference(vcpu->pid); + if (pid) + err = kill_pid_info(sig, siginfo, pid); + rcu_read_unlock(); + + return err; +} + +static void kvmi_vm_shutdown(struct kvm *kvm) +{ + int i; + struct kvm_vcpu *vcpu; + + kvm_for_each_vcpu(i, vcpu, kvm) + kvmi_vcpu_kill(SIGTERM, vcpu); +} + +void kvmi_handle_common_event_actions(struct kvm_vcpu *vcpu, u32 action, + const char *str) +{ + struct kvm *kvm = vcpu->kvm; + + switch (action) { + case KVMI_EVENT_ACTION_CRASH: + kvmi_vm_shutdown(kvm); + break; + + default: + kvmi_err(IKVM(kvm), "Unsupported action %d for event %s\n", + action, str); + } +} + void kvmi_run_jobs(struct kvm_vcpu *vcpu) { struct kvmi_vcpu *ivcpu = IVCPU(vcpu);