From patchwork Sat Jan 6 16:02:52 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dongjiu Geng X-Patchwork-Id: 10147691 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 81698601BE for ; Sat, 6 Jan 2018 07:59:02 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5F01C28974 for ; Sat, 6 Jan 2018 07:59:02 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 53742289BF; Sat, 6 Jan 2018 07:59:02 +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=-5.0 required=2.0 tests=BAYES_00, DATE_IN_FUTURE_06_12, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EE53028974 for ; Sat, 6 Jan 2018 07:59:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752629AbeAFH6M (ORCPT ); Sat, 6 Jan 2018 02:58:12 -0500 Received: from szxga05-in.huawei.com ([45.249.212.191]:3745 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752264AbeAFH6J (ORCPT ); Sat, 6 Jan 2018 02:58:09 -0500 Received: from DGGEMS412-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 79722554E30C8; Sat, 6 Jan 2018 15:57:51 +0800 (CST) Received: from localhost.localdomain (10.143.28.90) by DGGEMS412-HUB.china.huawei.com (10.3.19.212) with Microsoft SMTP Server id 14.3.361.1; Sat, 6 Jan 2018 15:57:44 +0800 From: Dongjiu Geng To: , , , , , , , , , , , , , , , , CC: , Subject: [PATCH v9 2/7] KVM: arm64: Save ESR_EL2 on guest SError Date: Sun, 7 Jan 2018 00:02:52 +0800 Message-ID: <1515254577-6460-3-git-send-email-gengdongjiu@huawei.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1515254577-6460-1-git-send-email-gengdongjiu@huawei.com> References: <1515254577-6460-1-git-send-email-gengdongjiu@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.143.28.90] X-CFilter-Loop: Reflected Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: James Morse When we exit a guest due to an SError the vcpu fault info isn't updated with the ESR. Today this is only done for traps. The v8.2 RAS Extensions define ISS values for SError. Update the vcpu's fault_info with the ESR on SError so that handle_exit() can determine if this was a RAS SError and decode its severity. Signed-off-by: James Morse --- arch/arm64/kvm/hyp/switch.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c index 945e79c..fb5a538 100644 --- a/arch/arm64/kvm/hyp/switch.c +++ b/arch/arm64/kvm/hyp/switch.c @@ -228,11 +228,12 @@ static bool __hyp_text __translate_far_to_hpfar(u64 far, u64 *hpfar) static bool __hyp_text __populate_fault_info(struct kvm_vcpu *vcpu) { - u64 esr = read_sysreg_el2(esr); - u8 ec = ESR_ELx_EC(esr); + u8 ec; + u64 esr; u64 hpfar, far; - vcpu->arch.fault.esr_el2 = esr; + esr = vcpu->arch.fault.esr_el2; + ec = ESR_ELx_EC(esr); if (ec != ESR_ELx_EC_DABT_LOW && ec != ESR_ELx_EC_IABT_LOW) return true; @@ -313,6 +314,8 @@ int __hyp_text __kvm_vcpu_run(struct kvm_vcpu *vcpu) exit_code = __guest_enter(vcpu, host_ctxt); /* And we're baaack! */ + if (ARM_EXCEPTION_CODE(exit_code) != ARM_EXCEPTION_IRQ) + vcpu->arch.fault.esr_el2 = read_sysreg_el2(esr); /* * We're using the raw exception code in order to only process * the trap if no SError is pending. We will come back to the