From patchwork Fri Apr 7 01:59:41 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: zhaotianrui X-Patchwork-Id: 80619 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:b0ea:0:b0:3b6:4342:cba0 with SMTP id b10csp1430357vqo; Thu, 6 Apr 2023 19:04:45 -0700 (PDT) X-Google-Smtp-Source: AKy350Z6wXYoc62fqTgAB9NcdegfX/Y1152A8Z5rBWpcXaSmdAxij8ul0bhn15wAzzYQLlM7sD+q X-Received: by 2002:a17:906:2710:b0:878:72f7:bd87 with SMTP id z16-20020a170906271000b0087872f7bd87mr809801ejc.6.1680833085513; Thu, 06 Apr 2023 19:04:45 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1680833085; cv=none; d=google.com; s=arc-20160816; b=XET7ldAxv6uhWDGB9FnYex/U9zcnmWbjm3xzeEZD1NrfxeCaF8XpjazbFz5V+fEljV 6lquZFXytBG4q4i2Qx0fV0q4A0qeU+K4sT3CUL1cC2EZCNbi02GoRf6yduA/2NYFPZEH i2LEaFfmwH/GZeKjI2anuH5unHbgKHQCxwgCy4Vlp2evpwukbR2VjOZ6Bfr077pF7YUL CZdM1nbQ1b+VUAR0MK9tvocGKVronEBYNeMx7XeYUfGpBH9xEk3z1zr+T+pY0INI7scS LlvnUpwDgXrhBzyAhPKpJO7k1LRB2wG2gE9i2BlFsJx4xVqz7JC/qz+lMXqQtHrcXG7w BtFA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=ae5C0bxQoD/2cMV/9BpPV5GVgF+qgxKfYFH0SQ3H2XE=; b=roI8wtNvS36mSWzr/1RlQmQ6CnP5M7eCwcQtBMRD9Szsm2r5+bQu1LUClf/kk21mgx skIXqi+aEZ3H4ltS3FiZKlRWjujKgNIPG5B6mJ2eLPi8gOAs/joXr4fTIcQNnF3hVkfQ LSNTfyG+M+X7L6pmbIhzPvuFBq8vbwhPL9vlaMWXtUpvO5enbAizJymIlU45RGqK9XqB doI0sH55FukPSzSwdcsE/WCfFjwoOfBMBOfenEDu6XjjE+i37ayErO3RSTF3L8sNFl7R Ebhec764pzPTPUtQdXO2Skb52+tyYrW05g2Kx8ycdfgSML8XCNMrifqH0GPhVd2m3kod 34AQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id sa39-20020a1709076d2700b0092be21ff08dsi2816354ejc.536.2023.04.06.19.04.21; Thu, 06 Apr 2023 19:04:45 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240051AbjDGCAr (ORCPT + 99 others); Thu, 6 Apr 2023 22:00:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48906 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239666AbjDGCAU (ORCPT ); Thu, 6 Apr 2023 22:00:20 -0400 Received: from loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 350CD9ED1; Thu, 6 Apr 2023 19:00:10 -0700 (PDT) Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8BxIk4peS9kvqYXAA--.36488S3; Fri, 07 Apr 2023 10:00:09 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8BxLL4jeS9k17sXAA--.23369S10; Fri, 07 Apr 2023 10:00:08 +0800 (CST) From: Tianrui Zhao To: Paolo Bonzini Cc: Huacai Chen , WANG Xuerui , Greg Kroah-Hartman , loongarch@lists.linux.dev, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Jens Axboe , Mark Brown , Alex Deucher , Oliver Upton , maobibo@loongson.cn, Xi Ruoyao , zhaotianrui@loongson.cn Subject: [PATCH v5 08/30] LoongArch: KVM: Implement vcpu handle exit interface Date: Fri, 7 Apr 2023 09:59:41 +0800 Message-Id: <20230407020003.3651096-9-zhaotianrui@loongson.cn> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230407020003.3651096-1-zhaotianrui@loongson.cn> References: <20230407020003.3651096-1-zhaotianrui@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf8BxLL4jeS9k17sXAA--.23369S10 X-CM-SenderInfo: p2kd03xldq233l6o00pqjv00gofq/ X-Coremail-Antispam: 1Uk129KBjvJXoW7WF17ArW5CFyrCF15uw17Jrb_yoW8Cr4Dpr 4xCr1Ygw4rG34xJ3sayrs0qr4Yq3s7Kr17ZrZxX3y2yFsFvas0qr48KrZFyFyrWw1FqF1f Xr1rG3Z09F4jywUanT9S1TB71UUUUjJqnTZGkaVYY2UrUUUUj1kv1TuYvTs0mT0YCTnIWj qI5I8CrVACY4xI64kE6c02F40Ex7xfYxn0WfASr-VFAUDa7-sFnT9fnUUIcSsGvfJTRUUU bx8Fc2x0x2IEx4CE42xK8VAvwI8IcIk0rVWrJVCq3wA2ocxC64kIII0Yj41l84x0c7CEw4 AK67xGY2AK021l84ACjcxK6xIIjxv20xvE14v26w1j6s0DM28EF7xvwVC0I7IYx2IY6xkF 7I0E14v26r4UJVWxJr1l84ACjcxK6I8E87Iv67AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aV CY1x0267AKxVW8Jr0_Cr1UM2kKe7AKxVWUAVWUtwAS0I0E0xvYzxvE52x082IY62kv0487 Mc804VCY07AIYIkI8VC2zVCFFI0UMc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VCjz48v1s IEY20_WwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41lc7CjxVAaw2AFwI0_ JF0_Jw1l42xK82IYc2Ij64vIr41l42xK82IY6x8ErcxFaVAv8VWrMxC20s026xCaFVCjc4 AY6r1j6r4UMxCIbckI1I0E14v26r126r1DMI8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCj r7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUtVW8ZwCIc40Y0x0EwIxGrwCI42IY6x IIjxv20xvE14v26w1j6s0DMIIF0xvE2Ix0cI8IcVCY1x0267AKxVW8Jr0_Cr1UMIIF0xvE 42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVWxJVW8Jr1lIxAIcVC2z280aV CY1x0267AKxVW8Jr0_Cr1UYxBIdaVFxhVjvjDU0xZFpf9x0zR9iSdUUUUU= X-Spam-Status: No, score=-0.0 required=5.0 tests=SPF_HELO_PASS,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1762481233857153863?= X-GMAIL-MSGID: =?utf-8?q?1762481233857153863?= Implement vcpu handle exit interface, getting the exit code by ESTAT register and using kvm exception vector to handle it. Signed-off-by: Tianrui Zhao --- arch/loongarch/kvm/vcpu.c | 46 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c index bc9e3889f..651ae5ca0 100644 --- a/arch/loongarch/kvm/vcpu.c +++ b/arch/loongarch/kvm/vcpu.c @@ -56,6 +56,52 @@ static void kvm_pre_enter_guest(struct kvm_vcpu *vcpu) vcpu->arch.aux_inuse &= ~KVM_LARCH_CSR; } +/* + * 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; + run->ready_for_interrupt_injection = 1; + + local_irq_enable(); + guest_state_exit_irqoff(); + + trace_kvm_exit(vcpu, exccode); + if (exccode) { + ret = _kvm_handle_fault(vcpu, exccode); + } else { + WARN(!intr, "suspicious vm exiting"); + ++vcpu->stat.int_exits; + } + + cond_resched(); + local_irq_disable(); + + if (ret == RESUME_HOST) + return ret; + + /* Only check for signals if not already exiting to userspace */ + if (signal_pending(current)) { + vcpu->run->exit_reason = KVM_EXIT_INTR; + ++vcpu->stat.signal_exits; + return -EINTR; + } + + kvm_pre_enter_guest(vcpu); + trace_kvm_reenter(vcpu); + guest_state_enter_irqoff(); + return RESUME_GUEST; +} + int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu) { unsigned long timer_hz;