From patchwork Mon Jun 26 08:47:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: zhaotianrui X-Patchwork-Id: 112805 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:994d:0:b0:3d9:f83d:47d9 with SMTP id k13csp7343915vqr; Mon, 26 Jun 2023 02:10:16 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ5yV0NIpvPCRfBbuSG6gMa99ThWlSRSojPD4MNQqNCoCC5Ch15leu3T6zqJGXg3VmSuNppA X-Received: by 2002:a17:906:ef03:b0:974:183a:54b6 with SMTP id f3-20020a170906ef0300b00974183a54b6mr23958703ejs.33.1687770615623; Mon, 26 Jun 2023 02:10:15 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1687770615; cv=none; d=google.com; s=arc-20160816; b=F9+dN3JUkuetIEPDVEC2TL7/f++aLV5fNdUm8KovHwYFd8mVVNNp4RoAKoj/le6wCl RbSDEAuS6NGSPxvyNMy/EbhswRCvdsBxhFkGwgB/OkDfdW3dft75oYvRWhDZK5EVFk7H 6JoMFgOP6lwoGg/35z4ylXDtzST6CV+1WYi1r4dyNqXGTnt7qt9CX2UPEX+bgww42zwp /LvV2G/qwGIvEVcJPm49e3zWAnZvJka8UHmEOvf2Gs/S/c67T8rCK705iHIpURkXQ+Cz DclX/tYu2oqQBUCXoXJBmlM/b51tQgyAOt4qIAZQCXk+ImiL0ETbj9/qmvLqQOLJ9CcJ oPTA== 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=WGxADIiFAVIQzJWVkF14hjD3AhDr9yfrIT8Ffbh+XCw=; fh=FJJE1KfQOXNgUCxk/Gxke8tBG9gBLo3aFI+sNzAMBeU=; b=j8VWxmWlUicfe9yP+JailAL5tbJmkOLJkOagmyXtF0fElDw5dfxKfGi6vDPKfEMpnV L5lNjdsSXEMqYcK51a261PF0MHhTRPEWwHljVNt0DgRkdc8VYtXMh3DPIkwdl0ptatc6 +5f92KFqqz27sy+Hwmkl6mV6PNAZmph3EuVLbpEECFEeiIthiQlK8JZtDjJKeoRwLYXu FhytQRgcZ7i17dfXaPPzLHnz7WUOkcTGXWZK1Jur5eG+HUWiecn63Ph2tKK65ak27MeM OALwqjlmAeGuY3kRB9vlJGC22o3Z6c7/bgX+YWx0NM46H2N/Lv4BmU8XimqcNVwrtwNV z8/w== 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 ba14-20020a0564021ace00b0051d9ddf2888si471044edb.68.2023.06.26.02.09.51; Mon, 26 Jun 2023 02:10:15 -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 S230503AbjFZIuL (ORCPT + 99 others); Mon, 26 Jun 2023 04:50:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40152 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230513AbjFZIs4 (ORCPT ); Mon, 26 Jun 2023 04:48:56 -0400 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 216FA172B; Mon, 26 Jun 2023 01:48:11 -0700 (PDT) Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8CxLMfCUJlkCjUCAA--.3326S3; Mon, 26 Jun 2023 16:48:02 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8Bxxsy5UJlk4hQJAA--.19269S24; Mon, 26 Jun 2023 16:48:02 +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, tangyouling@loongson.cn Subject: [PATCH v15 22/30] LoongArch: KVM: Implement handle idle exception Date: Mon, 26 Jun 2023 16:47:44 +0800 Message-Id: <20230626084752.1138621-23-zhaotianrui@loongson.cn> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230626084752.1138621-1-zhaotianrui@loongson.cn> References: <20230626084752.1138621-1-zhaotianrui@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf8Bxxsy5UJlk4hQJAA--.19269S24 X-CM-SenderInfo: p2kd03xldq233l6o00pqjv00gofq/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,SPF_HELO_NONE, SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham 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?1769755761202010876?= X-GMAIL-MSGID: =?utf-8?q?1769755761202010876?= Implement kvm handle LoongArch vcpu idle exception, using kvm_vcpu_block to emulate it. Reviewed-by: Bibo Mao Signed-off-by: Tianrui Zhao --- arch/loongarch/kvm/exit.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/arch/loongarch/kvm/exit.c b/arch/loongarch/kvm/exit.c index 32edd915ebcb..30748238c78c 100644 --- a/arch/loongarch/kvm/exit.c +++ b/arch/loongarch/kvm/exit.c @@ -188,3 +188,23 @@ int _kvm_complete_iocsr_read(struct kvm_vcpu *vcpu, struct kvm_run *run) return er; } + +int _kvm_emu_idle(struct kvm_vcpu *vcpu) +{ + ++vcpu->stat.idle_exits; + trace_kvm_exit_idle(vcpu, KVM_TRACE_EXIT_IDLE); + + if (!kvm_arch_vcpu_runnable(vcpu)) { + /* + * Switch to the software timer before halt-polling/blocking as + * the guest's timer may be a break event for the vCPU, and the + * hypervisor timer runs only when the CPU is in guest mode. + * Switch before halt-polling so that KVM recognizes an expired + * timer before blocking. + */ + kvm_save_timer(vcpu); + kvm_vcpu_block(vcpu); + } + + return EMULATE_DONE; +}