From patchwork Mon May 22 03:11:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: zhaotianrui X-Patchwork-Id: 13249705 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 EC492C77B73 for ; Mon, 22 May 2023 03:12:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231582AbjEVDMa (ORCPT ); Sun, 21 May 2023 23:12:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41946 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230164AbjEVDMX (ORCPT ); Sun, 21 May 2023 23:12:23 -0400 Received: from loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 1B12CE0; Sun, 21 May 2023 20:12:20 -0700 (PDT) Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8CxNumU3WpkDssKAA--.18847S3; Mon, 22 May 2023 11:12:20 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8DxMMiR3WpkJIFuAA--.54000S8; Mon, 22 May 2023 11:12:19 +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 v11 06/31] LoongArch: KVM: Implement vcpu create and destroy interface Date: Mon, 22 May 2023 11:11:52 +0800 Message-Id: <20230522031217.956464-7-zhaotianrui@loongson.cn> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230522031217.956464-1-zhaotianrui@loongson.cn> References: <20230522031217.956464-1-zhaotianrui@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf8DxMMiR3WpkJIFuAA--.54000S8 X-CM-SenderInfo: p2kd03xldq233l6o00pqjv00gofq/ X-Coremail-Antispam: 1Uk129KBjvJXoWxur1fAw1xCrW7Wr1ktw4UCFg_yoW5Cr47pF 4xCw15Ww48Jry7Gw1fXrn0vrn0qrW8uF12ga47X3ySyr1DtryFvF4vkrWDAFW3XayfZF1S qF1rJF1Uuw4UAw7anT9S1TB71UUUUjJqnTZGkaVYY2UrUUUUj1kv1TuYvTs0mT0YCTnIWj qI5I8CrVACY4xI64kE6c02F40Ex7xfYxn0WfASr-VFAUDa7-sFnT9fnUUIcSsGvfJTRUUU b4xFc2x0x2IEx4CE42xK8VAvwI8IcIk0rVWrJVCq3wA2ocxC64kIII0Yj41l84x0c7CEw4 AK67xGY2AK021l84ACjcxK6xIIjxv20xvE14v26F1j6w1UM28EF7xvwVC0I7IYx2IY6xkF 7I0E14v26F4j6r4UJwA2z4x0Y4vEx4A2jsIE14v26r4UJVWxJr1l84ACjcxK6I8E87Iv6x kF7I0E14v26r4UJVWxJr1ln4kS14v26r126r1DM2AIxVAIcxkEcVAq07x20xvEncxIr21l 57IF6xkI12xvs2x26I8E6xACxx1l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6x8ErcxFaV Av8VWrMcvjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwCY1x0262kKe7AKxVWU AVWUtwCF04k20xvY0x0EwIxGrwCF04k20xvE74AGY7Cv6cx26rWl4I8I3I0E4IkC6x0Yz7 v_Jr0_Gr1l4IxYO2xFxVAFwI0_JF0_Jw1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8G jcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0xvE2I x0cI8IcVAFwI0_Ar0_tr1lIxAIcVC0I7IYx2IY6xkF7I0E14v26F4j6r4UJwCI42IY6xAI w20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Cr0_Gr1UMIIF0xvEx4A2jsIEc7 CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x0zR9iSdUUUUU= Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Implement vcpu create and destroy interface, saving some info into vcpu arch structure such as vcpu exception entrance, vcpu enter guest pointer, etc. Init vcpu timer and set address translation mode when vcpu create. Signed-off-by: Tianrui Zhao --- arch/loongarch/kvm/vcpu.c | 88 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 88 insertions(+) create mode 100644 arch/loongarch/kvm/vcpu.c diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c new file mode 100644 index 000000000000..24b5b00266a1 --- /dev/null +++ b/arch/loongarch/kvm/vcpu.c @@ -0,0 +1,88 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2020-2023 Loongson Technology Corporation Limited + */ + +#include +#include +#include +#include +#include + +#define CREATE_TRACE_POINTS +#include "trace.h" + +int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id) +{ + return 0; +} + +int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu) +{ + unsigned long timer_hz; + struct loongarch_csrs *csr; + + vcpu->arch.vpid = 0; + + hrtimer_init(&vcpu->arch.swtimer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS_PINNED); + vcpu->arch.swtimer.function = kvm_swtimer_wakeup; + vcpu->kvm->arch.online_vcpus = vcpu->vcpu_id + 1; + + vcpu->arch.guest_eentry = (unsigned long)kvm_loongarch_ops->guest_eentry; + vcpu->arch.handle_exit = _kvm_handle_exit; + vcpu->arch.csr = kzalloc(sizeof(struct loongarch_csrs), GFP_KERNEL); + if (!vcpu->arch.csr) + return -ENOMEM; + + /* + * kvm all exceptions share one exception entry, and host <-> guest switch + * also switch excfg.VS field, keep host excfg.VS info here + */ + vcpu->arch.host_ecfg = (read_csr_ecfg() & CSR_ECFG_VS); + + /* Init */ + vcpu->arch.last_sched_cpu = -1; + vcpu->arch.last_exec_cpu = -1; + + /* + * Initialize guest register state to valid architectural reset state. + */ + timer_hz = calc_const_freq(); + kvm_init_timer(vcpu, timer_hz); + + /* Set Initialize mode for GUEST */ + csr = vcpu->arch.csr; + kvm_write_sw_gcsr(csr, LOONGARCH_CSR_CRMD, CSR_CRMD_DA); + + /* Set cpuid */ + kvm_write_sw_gcsr(csr, LOONGARCH_CSR_TMID, vcpu->vcpu_id); + + /* start with no pending virtual guest interrupts */ + csr->csrs[LOONGARCH_CSR_GINTC] = 0; + + return 0; +} + +void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) +{ +} + +void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) +{ + int cpu; + struct kvm_context *context; + + hrtimer_cancel(&vcpu->arch.swtimer); + kvm_mmu_free_memory_cache(&vcpu->arch.mmu_page_cache); + kfree(vcpu->arch.csr); + + /* + * If the vCPU is freed and reused as another vCPU, we don't want the + * matching pointer wrongly hanging around in last_vcpu. + */ + for_each_possible_cpu(cpu) { + context = per_cpu_ptr(vcpu->kvm->arch.vmcs, cpu); + if (context->last_vcpu == vcpu) + context->last_vcpu = NULL; + } +}