From patchwork Wed Apr 2 10:42:21 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anup Patel X-Patchwork-Id: 27610 Return-Path: X-Original-To: linaro@patches.linaro.org Delivered-To: linaro@patches.linaro.org Received: from mail-pa0-f71.google.com (mail-pa0-f71.google.com [209.85.220.71]) by ip-10-151-82-157.ec2.internal (Postfix) with ESMTPS id 3009620341 for ; Wed, 2 Apr 2014 10:51:19 +0000 (UTC) Received: by mail-pa0-f71.google.com with SMTP id kq14sf5867pab.10 for ; Wed, 02 Apr 2014 03:51:18 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:delivered-to:from:to:subject:date:message-id :in-reply-to:references:cc:precedence:list-id:list-unsubscribe :list-archive:list-post:list-help:list-subscribe:mime-version:sender :errors-to:x-original-sender:x-original-authentication-results :mailing-list:content-type:content-transfer-encoding; bh=OIuZzJOIdtfXU8i2QdpnFC4o8BsRI7IlO6NWgdVARjc=; b=GWI/xPH8BL3uPLtb2WAXhciW6AXGJxaNC0T6kNRygYUVr+Oy6dzNBZkKg9pWFKJ4BI HEp+7tGGWX2AqxAuVuOshbsv+UZKRrFgDEKCKFF72dtswsjzzYicgch23nWYfzV0I6Ep sxRqfr5T0dgplhb2C7ArQCte7oUl5fNlXcQPwYNqCt0SxYU+Za2Gwtc2ih4QrIY5dMt3 ghtmNevcPgNL9ewuzUgf6uvvH+r/jM2tYbsAXKyQifivdJwt1sO7tYq1z+Jnu0RgZRPI 6EENRr2aHE0dHt4kRcD40GvccwQDiRBZRm5G1pvsezq6tUIqjIIVPEuvx0pCaQtiGWa8 DqCA== X-Gm-Message-State: ALoCoQl6ND2IEyiAbRPcY8HCbvhp0y0RMuwcZt33CaBebCOOgWNrRY8M+8p1kuMTnFkTqmQIsN+H X-Received: by 10.66.241.8 with SMTP id we8mr18257960pac.16.1396435878423; Wed, 02 Apr 2014 03:51:18 -0700 (PDT) X-BeenThere: patchwork-forward@linaro.org Received: by 10.140.104.163 with SMTP id a32ls277811qgf.73.gmail; Wed, 02 Apr 2014 03:51:18 -0700 (PDT) X-Received: by 10.52.113.1 with SMTP id iu1mr7435073vdb.35.1396435878313; Wed, 02 Apr 2014 03:51:18 -0700 (PDT) Received: from mail-vc0-f177.google.com (mail-vc0-f177.google.com [209.85.220.177]) by mx.google.com with ESMTPS id l2si434498vcf.151.2014.04.02.03.51.18 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 02 Apr 2014 03:51:18 -0700 (PDT) Received-SPF: neutral (google.com: 209.85.220.177 is neither permitted nor denied by best guess record for domain of patch+caf_=patchwork-forward=linaro.org@linaro.org) client-ip=209.85.220.177; Received: by mail-vc0-f177.google.com with SMTP id if17so5239vcb.36 for ; Wed, 02 Apr 2014 03:51:18 -0700 (PDT) X-Received: by 10.52.164.237 with SMTP id yt13mr30794374vdb.18.1396435878157; Wed, 02 Apr 2014 03:51:18 -0700 (PDT) X-Forwarded-To: patchwork-forward@linaro.org X-Forwarded-For: patch@linaro.org patchwork-forward@linaro.org Delivered-To: patch@linaro.org Received: by 10.220.12.8 with SMTP id v8csp311718vcv; Wed, 2 Apr 2014 03:51:17 -0700 (PDT) X-Received: by 10.194.71.164 with SMTP id w4mr22094662wju.0.1396435877192; Wed, 02 Apr 2014 03:51:17 -0700 (PDT) Received: from casper.infradead.org (casper.infradead.org. [2001:770:15f::2]) by mx.google.com with ESMTPS id hl20si1138379wib.63.2014.04.02.03.51.16 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 02 Apr 2014 03:51:17 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-arm-kernel-bounces+patch=linaro.org@lists.infradead.org designates 2001:770:15f::2 as permitted sender) client-ip=2001:770:15f::2; Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WVIl2-0002Pf-Qx; Wed, 02 Apr 2014 10:51:00 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1WVIl0-0007z6-Fl; Wed, 02 Apr 2014 10:50:58 +0000 Received: from mail-pd0-f170.google.com ([209.85.192.170]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WVIkx-0007yM-EX for linux-arm-kernel@lists.infradead.org; Wed, 02 Apr 2014 10:50:55 +0000 Received: by mail-pd0-f170.google.com with SMTP id v10so7523pde.15 for ; Wed, 02 Apr 2014 03:50:34 -0700 (PDT) X-Received: by 10.68.194.202 with SMTP id hy10mr37221278pbc.94.1396435402846; Wed, 02 Apr 2014 03:43:22 -0700 (PDT) Received: from pnqlab006.amcc.com ([182.73.239.130]) by mx.google.com with ESMTPSA id tk5sm3573403pbc.63.2014.04.02.03.43.17 for (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 02 Apr 2014 03:43:21 -0700 (PDT) From: Anup Patel To: kvmarm@lists.cs.columbia.edu Subject: [PATCH v7 06/12] KVM: Add KVM_EXIT_SYSTEM_EVENT to user space API header Date: Wed, 2 Apr 2014 16:12:21 +0530 Message-Id: <1396435347-20056-7-git-send-email-anup.patel@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1396435347-20056-1-git-send-email-anup.patel@linaro.org> References: <1396435347-20056-1-git-send-email-anup.patel@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140402_065055_546968_B56C5511 X-CRM114-Status: GOOD ( 12.89 ) X-Spam-Score: -1.9 (-) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-1.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [209.85.192.170 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: Mark Rutland , Rob Herring , linaro-kernel@lists.linaro.org, Anup Patel , Marc Zyngier , patches@apm.com, Ashwin Chaugule , linux-arm-kernel@lists.infradead.org, Christoffer Dall , Pranavkumar Sawargaonkar X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: , List-Help: , List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patch=linaro.org@lists.infradead.org X-Removed-Original-Auth: Dkim didn't pass. X-Original-Sender: anup.patel@linaro.org X-Original-Authentication-Results: mx.google.com; spf=neutral (google.com: 209.85.220.177 is neither permitted nor denied by best guess record for domain of patch+caf_=patchwork-forward=linaro.org@linaro.org) smtp.mail=patch+caf_=patchwork-forward=linaro.org@linaro.org Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org X-Google-Group-Id: 836684582541 Currently, we don't have an exit reason to notify user space about a system-level event (for e.g. system reset or shutdown) triggered by the VCPU. This patch adds exit reason KVM_EXIT_SYSTEM_EVENT for this purpose. We can also inform user space about the 'type' and architecture specific 'flags' of a system-level event using the kvm_run structure. This newly added KVM_EXIT_SYSTEM_EVENT will be used by KVM ARM/ARM64 in-kernel PSCI v0.2 support to reset/shutdown VMs. Signed-off-by: Anup Patel Signed-off-by: Pranavkumar Sawargaonkar Reviewed-by: Christoffer Dall --- Documentation/virtual/kvm/api.txt | 15 +++++++++++++++ include/uapi/linux/kvm.h | 8 ++++++++ 2 files changed, 23 insertions(+) diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index 0114d5b..e675ec2 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -2721,6 +2721,21 @@ It gets triggered whenever both KVM_CAP_PPC_EPR are enabled and an external interrupt has just been delivered into the guest. User space should put the acknowledged interrupt vector into the 'epr' field. + /* KVM_EXIT_SYSTEM_EVENT */ + struct { +#define KVM_SYSTEM_EVENT_SHUTDOWN 1 +#define KVM_SYSTEM_EVENT_RESET 2 + __u32 type; + __u64 flags; + } system_event; + +If exit_reason is KVM_EXIT_SYSTEM_EVENT then the vcpu has triggered +a system-level event using some architecture specific mechanism (hypercall +or some special instruction). In case of ARM/ARM64, this is triggered using +HVC instruction based PSCI call from the vcpu. The 'type' field describes +the system-level event type. The 'flags' field describes architecture +specific flags for the system-level event. + /* Fix the size of the union. */ char padding[256]; }; diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 260d3ae..0cf2882 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -171,6 +171,7 @@ struct kvm_pit_config { #define KVM_EXIT_WATCHDOG 21 #define KVM_EXIT_S390_TSCH 22 #define KVM_EXIT_EPR 23 +#define KVM_EXIT_SYSTEM_EVENT 24 /* For KVM_EXIT_INTERNAL_ERROR */ /* Emulate instruction failed. */ @@ -301,6 +302,13 @@ struct kvm_run { struct { __u32 epr; } epr; + /* KVM_EXIT_SYSTEM_EVENT */ + struct { +#define KVM_SYSTEM_EVENT_SHUTDOWN 1 +#define KVM_SYSTEM_EVENT_RESET 2 + __u32 type; + __u64 flags; + } system_event; /* Fix the size of the union. */ char padding[256]; };