From patchwork Mon Apr 9 21:36:33 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dongjiu Geng X-Patchwork-Id: 10331353 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 54AD36022E for ; Mon, 9 Apr 2018 13:33:43 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4110728A9D for ; Mon, 9 Apr 2018 13:33:43 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 35BD328AA8; Mon, 9 Apr 2018 13:33:43 +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=-1.0 required=2.0 tests=BAYES_00, DATE_IN_FUTURE_06_12, DKIM_SIGNED, DKIM_VALID, MAILING_LIST_MULTI autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id B56EF28A9D for ; Mon, 9 Apr 2018 13:33:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=d3zlrimjsSamxbB/KmWuHgg9kNol8uYorlIDFUZuQcM=; b=LZaITasgnK/ZRl HATudfWeJT0Xd/eXgqotVeDwI54ewOiIA5oEGY1rx8JreawBB050efVZRSq5vVnn3gp2pxdyLjO0t FV70vnaJP/VUEUd+YdU8lpAN0zicG9Zb+j7BhfsmbNUzQ5dQSvL8FqnWJFkxT9fi2ssM6pzZ58Ni2 drQsXaC6zcA0qPyIa6cRCL7X4nx6nrXM6Cm4DxXsZo4whSb4f5oIh0gzTGF2BIXAV0yI9Ryii8kiQ wWKPD1tQXOQo5KGhI3JDNQQt3hXhJdAdAmSYqRWO4e/Ahey/WJ/USkNiVScm6J2pQ8xxlINlQJ2yZ Fcap8KeSL8S2x5Pm5z8g==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1f5WvM-0001Vm-Bp; Mon, 09 Apr 2018 13:33:32 +0000 Received: from szxga05-in.huawei.com ([45.249.212.191] helo=huawei.com) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1f5WtL-0000QD-7o for linux-arm-kernel@lists.infradead.org; Mon, 09 Apr 2018 13:31:33 +0000 Received: from DGGEMS403-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id C5968AF65E691; Mon, 9 Apr 2018 21:31:00 +0800 (CST) Received: from localhost.localdomain (10.143.28.90) by DGGEMS403-HUB.china.huawei.com (10.3.19.203) with Microsoft SMTP Server id 14.3.361.1; Mon, 9 Apr 2018 21:30:53 +0800 From: Dongjiu Geng To: , , , , , , , , , , , , , , , , Subject: [PATCH v11 1/4] arm64: KVM: export the capability to set guest SError syndrome Date: Tue, 10 Apr 2018 05:36:33 +0800 Message-ID: <1523309796-36423-2-git-send-email-gengdongjiu@huawei.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1523309796-36423-1-git-send-email-gengdongjiu@huawei.com> References: <1523309796-36423-1-git-send-email-gengdongjiu@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.143.28.90] X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180409_063127_528175_44CAF608 X-CRM114-Status: GOOD ( 12.91 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: zhengxiang9@huawei.com, huangshaoyu@huawei.com, gengdongjiu@huawei.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Before user space injects a SError, it needs to know whether it can specify the guest Exception Syndrome, so KVM should tell user space whether it has such capability. Signed-off-by: Dongjiu Geng Reviewed-by: James Morse --- Documentation/virtual/kvm/api.txt | 11 +++++++++++ arch/arm64/kvm/reset.c | 3 +++ include/uapi/linux/kvm.h | 1 + 3 files changed, 15 insertions(+) diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index fc3ae95..8a3d708 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -4415,3 +4415,14 @@ Parameters: none This capability indicates if the flic device will be able to get/set the AIS states for migration via the KVM_DEV_FLIC_AISM_ALL attribute and allows to discover this without having to create a flic device. + +8.14 KVM_CAP_ARM_SET_SERROR_ESR + +Architectures: arm, arm64 + +This capability indicates that userspace can specify syndrome value reported to +guest OS when guest takes a virtual SError interrupt exception. +If KVM has this capability, userspace can only specify the ISS field for the ESR +syndrome, can not specify the EC field which is not under control by KVM. +If this virtual SError is taken to EL1 using AArch64, this value will be reported +into ISS filed of ESR_EL1. diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c index 3256b92..38c8a64 100644 --- a/arch/arm64/kvm/reset.c +++ b/arch/arm64/kvm/reset.c @@ -77,6 +77,9 @@ int kvm_arch_dev_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_ARM_PMU_V3: r = kvm_arm_support_pmu_v3(); break; + case KVM_CAP_ARM_INJECT_SERROR_ESR: + r = cpus_have_const_cap(ARM64_HAS_RAS_EXTN); + break; case KVM_CAP_SET_GUEST_DEBUG: case KVM_CAP_VCPU_ATTRIBUTES: r = 1; diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 8fb90a0..3587b33 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -934,6 +934,7 @@ struct kvm_ppc_resize_hpt { #define KVM_CAP_S390_AIS_MIGRATION 150 #define KVM_CAP_PPC_GET_CPU_CHAR 151 #define KVM_CAP_S390_BPB 152 +#define KVM_CAP_ARM_INJECT_SERROR_ESR 153 #ifdef KVM_CAP_IRQ_ROUTING