From patchwork Thu Feb 6 11:31:37 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anup Patel X-Patchwork-Id: 24246 Return-Path: X-Original-To: linaro@patches.linaro.org Delivered-To: linaro@patches.linaro.org Received: from mail-ob0-f199.google.com (mail-ob0-f199.google.com [209.85.214.199]) by ip-10-151-82-157.ec2.internal (Postfix) with ESMTPS id 8057620445 for ; Thu, 6 Feb 2014 11:32:46 +0000 (UTC) Received: by mail-ob0-f199.google.com with SMTP id vb8sf8361736obc.6 for ; Thu, 06 Feb 2014 03:32:45 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:delivered-to:from:to:cc:subject :date:message-id:in-reply-to:references:x-original-sender :x-original-authentication-results:precedence:mailing-list:list-id :list-post:list-help:list-archive:list-unsubscribe; bh=08qnx85Va+0QUZSI1mccbSrOROldF9oyzZpq4pM7tj8=; b=h63nKvzEimAFLXE9Yd3GBRkNnDE+PuiZKCRSFV4n8C6mS3VBzQ88bqpwDKCtroas6h zgLPGe5QLuU5Y7u8AipRVDFASTZIJIovsM1GiRGgrgInyT5QVKeOJqAHhjyLLOqjaLOC uvMVTmxS7ZW2Oy8Xp6+WjB/724UaaPrSWpxx8HJtdZHQuw9b+SfyntEJaDg7CtLvEZN3 NzW8aQM3ka+SzWJEeY/zYiBmYGxE+ciWcaflglrf31NFXOTFz9kbOuLCCTjUkC/jTbTr KKH/Q4iDgi/3cJ2syiu3JBZVzksC04IHcK8LUkG2400VZj+ISikQB4K05kVMBvxpm9hb +RKw== X-Gm-Message-State: ALoCoQmvmCgHgxoebgqDTpHGQpiAZwuODsZLDUPmp5WqQblGMZmwmWTiXYZMtrkQvoCt11PCGe0K X-Received: by 10.182.98.230 with SMTP id el6mr3298628obb.10.1391686365578; Thu, 06 Feb 2014 03:32:45 -0800 (PST) MIME-Version: 1.0 X-BeenThere: patchwork-forward@linaro.org Received: by 10.140.85.35 with SMTP id m32ls494018qgd.81.gmail; Thu, 06 Feb 2014 03:32:45 -0800 (PST) X-Received: by 10.52.95.233 with SMTP id dn9mr4527539vdb.3.1391686365484; Thu, 06 Feb 2014 03:32:45 -0800 (PST) Received: from mail-ve0-f173.google.com (mail-ve0-f173.google.com [209.85.128.173]) by mx.google.com with ESMTPS id sq4si164582vdc.54.2014.02.06.03.32.45 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 06 Feb 2014 03:32:45 -0800 (PST) Received-SPF: neutral (google.com: 209.85.128.173 is neither permitted nor denied by best guess record for domain of patch+caf_=patchwork-forward=linaro.org@linaro.org) client-ip=209.85.128.173; Received: by mail-ve0-f173.google.com with SMTP id oz11so1392066veb.32 for ; Thu, 06 Feb 2014 03:32:45 -0800 (PST) X-Received: by 10.220.159.4 with SMTP id h4mr5468894vcx.1.1391686365411; Thu, 06 Feb 2014 03:32:45 -0800 (PST) X-Forwarded-To: patchwork-forward@linaro.org X-Forwarded-For: patch@linaro.org patchwork-forward@linaro.org Delivered-To: patches@linaro.org Received: by 10.220.174.196 with SMTP id u4csp5258vcz; Thu, 6 Feb 2014 03:32:44 -0800 (PST) X-Received: by 10.66.164.229 with SMTP id yt5mr78104pab.67.1391686364245; Thu, 06 Feb 2014 03:32:44 -0800 (PST) Received: from mail-pa0-f46.google.com (mail-pa0-f46.google.com [209.85.220.46]) by mx.google.com with ESMTPS id tq3si761658pab.328.2014.02.06.03.32.43 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 06 Feb 2014 03:32:44 -0800 (PST) Received-SPF: neutral (google.com: 209.85.220.46 is neither permitted nor denied by best guess record for domain of anup.patel@linaro.org) client-ip=209.85.220.46; Received: by mail-pa0-f46.google.com with SMTP id rd3so1559318pab.5 for ; Thu, 06 Feb 2014 03:32:43 -0800 (PST) X-Received: by 10.68.204.161 with SMTP id kz1mr12046258pbc.156.1391686363644; Thu, 06 Feb 2014 03:32:43 -0800 (PST) Received: from pnqlab006.amcc.com ([182.73.239.130]) by mx.google.com with ESMTPSA id yd4sm2594758pbc.13.2014.02.06.03.32.38 for (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 06 Feb 2014 03:32:42 -0800 (PST) From: Anup Patel To: kvmarm@lists.cs.columbia.edu Cc: linux-arm-kernel@lists.infradead.org, linaro-kernel@lists.linaro.org, patches@linaro.org, patches@apm.com, Marc Zyngier , Christoffer Dall , Mark Rutland , Pranavkumar Sawargaonkar , Anup Patel Subject: [PATCH v4 05/10] KVM: Add KVM_EXIT_SYSTEM_EVENT to user space API header Date: Thu, 6 Feb 2014 17:01:37 +0530 Message-Id: <1391686302-19451-6-git-send-email-anup.patel@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1391686302-19451-1-git-send-email-anup.patel@linaro.org> References: <1391686302-19451-1-git-send-email-anup.patel@linaro.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: 209.85.128.173 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 Precedence: list Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org List-ID: X-Google-Group-Id: 836684582541 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , 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 73cb211..0f70625 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -2707,6 +2707,21 @@ 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 fb3c3f3..0723853 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]; };