From patchwork Thu Aug 31 08:29:58 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: zhaotianrui X-Patchwork-Id: 13371096 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id ECED6C83F10 for ; Thu, 31 Aug 2023 08:30:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242247AbjHaIa7 (ORCPT ); Thu, 31 Aug 2023 04:30:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58356 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245053AbjHaIao (ORCPT ); Thu, 31 Aug 2023 04:30:44 -0400 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 45755CEE; Thu, 31 Aug 2023 01:30:35 -0700 (PDT) Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8BxbOqlT_BkLF4dAA--.32672S3; Thu, 31 Aug 2023 16:30:29 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8Ax3c6gT_BkOPVnAA--.55892S10; Thu, 31 Aug 2023 16:30:29 +0800 (CST) From: Tianrui Zhao To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: Paolo Bonzini , Huacai Chen , WANG Xuerui , Greg Kroah-Hartman , loongarch@lists.linux.dev, Jens Axboe , Mark Brown , Alex Deucher , Oliver Upton , maobibo@loongson.cn, Xi Ruoyao , zhaotianrui@loongson.cn Subject: [PATCH v20 08/30] LoongArch: KVM: Implement vcpu handle exit interface Date: Thu, 31 Aug 2023 16:29:58 +0800 Message-Id: <20230831083020.2187109-9-zhaotianrui@loongson.cn> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230831083020.2187109-1-zhaotianrui@loongson.cn> References: <20230831083020.2187109-1-zhaotianrui@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf8Ax3c6gT_BkOPVnAA--.55892S10 X-CM-SenderInfo: p2kd03xldq233l6o00pqjv00gofq/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Implement vcpu handle exit interface, getting the exit code by ESTAT register and using kvm exception vector to handle it. Reviewed-by: Bibo Mao Signed-off-by: Tianrui Zhao --- arch/loongarch/kvm/vcpu.c | 41 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c index 83f2988ea6..ca4e8d074e 100644 --- a/arch/loongarch/kvm/vcpu.c +++ b/arch/loongarch/kvm/vcpu.c @@ -103,6 +103,47 @@ static int kvm_pre_enter_guest(struct kvm_vcpu *vcpu) return ret; } +/* + * Return 1 for resume guest and "<= 0" for resume host. + */ +static int _kvm_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu) +{ + unsigned long exst = vcpu->arch.host_estat; + u32 intr = exst & 0x1fff; /* ignore NMI */ + u32 exccode = (exst & CSR_ESTAT_EXC) >> CSR_ESTAT_EXC_SHIFT; + int ret = RESUME_GUEST; + + vcpu->mode = OUTSIDE_GUEST_MODE; + + /* Set a default exit reason */ + run->exit_reason = KVM_EXIT_UNKNOWN; + + guest_timing_exit_irqoff(); + guest_state_exit_irqoff(); + local_irq_enable(); + + trace_kvm_exit(vcpu, exccode); + if (exccode) { + ret = _kvm_handle_fault(vcpu, exccode); + } else { + WARN(!intr, "vm exiting with suspicious irq\n"); + ++vcpu->stat.int_exits; + } + + if (ret == RESUME_GUEST) + ret = kvm_pre_enter_guest(vcpu); + + if (ret != RESUME_GUEST) { + local_irq_disable(); + return ret; + } + + guest_timing_enter_irqoff(); + guest_state_enter_irqoff(); + trace_kvm_reenter(vcpu); + return RESUME_GUEST; +} + int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu) { unsigned long timer_hz;