From mboxrd@z Thu Jan 1 00:00:00 1970 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 7EBB7C7EE2A for ; Mon, 5 Jun 2023 12:27:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232440AbjFEM1Y (ORCPT ); Mon, 5 Jun 2023 08:27:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54906 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231495AbjFEM1W (ORCPT ); Mon, 5 Jun 2023 08:27:22 -0400 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 26BF9A1; Mon, 5 Jun 2023 05:27:19 -0700 (PDT) Received: from loongson.cn (unknown [10.20.42.170]) by gateway (Coremail) with SMTP id _____8CxZPCm1H1kKBUAAA--.177S3; Mon, 05 Jun 2023 20:27:18 +0800 (CST) Received: from [10.20.42.170] (unknown [10.20.42.170]) by localhost.localdomain (Coremail) with SMTP id AQAAf8Bx+OSl1H1kP3YAAA--.2228S3; Mon, 05 Jun 2023 20:27:18 +0800 (CST) Message-ID: Date: Mon, 5 Jun 2023 20:27:17 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.10.0 Subject: Re: [PATCH v12 02/31] LoongArch: KVM: Implement kvm module related interface Content-Language: en-US To: Tianrui Zhao , 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 , Xi Ruoyao References: <20230530015223.147755-1-zhaotianrui@loongson.cn> <20230530015223.147755-3-zhaotianrui@loongson.cn> From: "bibo, mao" In-Reply-To: <20230530015223.147755-3-zhaotianrui@loongson.cn> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-CM-TRANSID: AQAAf8Bx+OSl1H1kP3YAAA--.2228S3 X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBj93XoW3Cw1rArWkZF17KrWxZw48Xwc_yoWkAFyrpr W8CrWUAry3KFnrWa4rXw1Y9w4rJrWI9a9YvF15trWktwnFyrWrWa4Ikr1UJa45Jr1IvF4j k3Z5Crs3uFs2qacCm3ZEXasCq-sJn29KB7ZKAUJUUUUf529EdanIXcx71UUUUU7KY7ZEXa sCq-sGcSsGvfJ3Ic02F40EFcxC0VAKzVAqx4xG6I80ebIjqfuFe4nvWSU5nxnvy29KBjDU 0xBIdaVrnRJUUUPIb4IE77IF4wAFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2 IYs7xG6rWj6s0DM7CIcVAFz4kK6r1Y6r17M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48v e4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Gr0_Xr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI 0_Gr0_Cr1l84ACjcxK6I8E87Iv67AKxVWxJVW8Jr1l84ACjcxK6I8E87Iv6xkF7I0E14v2 6r4UJVWxJr1ln4kS14v26r126r1DM2AIxVAIcxkEcVAq07x20xvEncxIr21l57IF6xkI12 xvs2x26I8E6xACxx1l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r1q 6rW5McIj6I8E87Iv67AKxVW8JVWxJwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IY64vIr4 1lc7I2V7IY0VAS07AlzVAYIcxG8wCY1x0262kKe7AKxVWUAVWUtwCF04k20xvY0x0EwIxG rwCFx2IqxVCFs4IE7xkEbVWUJVW8JwCFI7km07C267AKxVWUAVWUtwC20s026c02F40E14 v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIxkG c2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVW8JVW5JwCI42IY6xIIjxv20xvEc7CjxVAFwI 0_Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r4j6F4U MIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x07jz5lbUUU UU= Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Reviewed-by: Bibo, Mao 在 2023/5/30 09:51, Tianrui Zhao 写道: > Implement LoongArch kvm module init, module exit interface, > using kvm context to save the vpid info and vcpu world switch > interface pointer. > > Signed-off-by: Tianrui Zhao > --- > arch/loongarch/kvm/main.c | 276 ++++++++++++++++++++++++++++++++++++++ > 1 file changed, 276 insertions(+) > create mode 100644 arch/loongarch/kvm/main.c > > diff --git a/arch/loongarch/kvm/main.c b/arch/loongarch/kvm/main.c > new file mode 100644 > index 000000000000..228d21dc40ae > --- /dev/null > +++ b/arch/loongarch/kvm/main.c > @@ -0,0 +1,276 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Copyright (C) 2020-2023 Loongson Technology Corporation Limited > + */ > + > +#include > +#include > +#include > +#include > + > +static struct kvm_context __percpu *vmcs; > +struct kvm_world_switch *kvm_loongarch_ops; > +unsigned long vpid_mask; > +static int gcsr_flag[CSR_MAX_NUMS]; > + > +int get_gcsr_flag(int csr) > +{ > + return gcsr_flag[csr]; > +} > + > +static inline void set_gcsr_sw_flag(int csr) > +{ > + gcsr_flag[csr] |= SW_GCSR; > +} > + > +static inline void set_gcsr_hw_flag(int csr) > +{ > + gcsr_flag[csr] |= HW_GCSR; > +} > + > +/* > + * The default value of gcsr_flag[CSR] is 0(INVALID_GCSR), and we use this > + * function to set the flag to 1(SW_GCSR) or 2(HW_GCSR) if the gcsr is software > + * or hardware. It will be used by get/set_gcsr, if gcsr_flag is HW we should > + * use gcsrrd/gcsrwr to access it, else use sw csr to emulate it. > + */ > +static void _kvm_init_gcsr_flag(void) > +{ > + set_gcsr_hw_flag(LOONGARCH_CSR_CRMD); > + set_gcsr_hw_flag(LOONGARCH_CSR_PRMD); > + set_gcsr_hw_flag(LOONGARCH_CSR_EUEN); > + set_gcsr_hw_flag(LOONGARCH_CSR_MISC); > + set_gcsr_hw_flag(LOONGARCH_CSR_ECFG); > + set_gcsr_hw_flag(LOONGARCH_CSR_ESTAT); > + set_gcsr_hw_flag(LOONGARCH_CSR_ERA); > + set_gcsr_hw_flag(LOONGARCH_CSR_BADV); > + set_gcsr_hw_flag(LOONGARCH_CSR_BADI); > + set_gcsr_hw_flag(LOONGARCH_CSR_EENTRY); > + set_gcsr_hw_flag(LOONGARCH_CSR_TLBIDX); > + set_gcsr_hw_flag(LOONGARCH_CSR_TLBEHI); > + set_gcsr_hw_flag(LOONGARCH_CSR_TLBELO0); > + set_gcsr_hw_flag(LOONGARCH_CSR_TLBELO1); > + set_gcsr_hw_flag(LOONGARCH_CSR_ASID); > + set_gcsr_hw_flag(LOONGARCH_CSR_PGDL); > + set_gcsr_hw_flag(LOONGARCH_CSR_PGDH); > + set_gcsr_hw_flag(LOONGARCH_CSR_PWCTL0); > + set_gcsr_hw_flag(LOONGARCH_CSR_PWCTL1); > + set_gcsr_hw_flag(LOONGARCH_CSR_STLBPGSIZE); > + set_gcsr_hw_flag(LOONGARCH_CSR_RVACFG); > + set_gcsr_hw_flag(LOONGARCH_CSR_CPUID); > + set_gcsr_hw_flag(LOONGARCH_CSR_PRCFG1); > + set_gcsr_hw_flag(LOONGARCH_CSR_PRCFG2); > + set_gcsr_hw_flag(LOONGARCH_CSR_PRCFG3); > + set_gcsr_hw_flag(LOONGARCH_CSR_KS0); > + set_gcsr_hw_flag(LOONGARCH_CSR_KS1); > + set_gcsr_hw_flag(LOONGARCH_CSR_KS2); > + set_gcsr_hw_flag(LOONGARCH_CSR_KS3); > + set_gcsr_hw_flag(LOONGARCH_CSR_KS4); > + set_gcsr_hw_flag(LOONGARCH_CSR_KS5); > + set_gcsr_hw_flag(LOONGARCH_CSR_KS6); > + set_gcsr_hw_flag(LOONGARCH_CSR_KS7); > + set_gcsr_hw_flag(LOONGARCH_CSR_TMID); > + set_gcsr_hw_flag(LOONGARCH_CSR_TCFG); > + set_gcsr_hw_flag(LOONGARCH_CSR_TVAL); > + set_gcsr_hw_flag(LOONGARCH_CSR_CNTC); > + set_gcsr_hw_flag(LOONGARCH_CSR_LLBCTL); > + set_gcsr_hw_flag(LOONGARCH_CSR_TLBRENTRY); > + set_gcsr_hw_flag(LOONGARCH_CSR_TLBRBADV); > + set_gcsr_hw_flag(LOONGARCH_CSR_TLBRERA); > + set_gcsr_hw_flag(LOONGARCH_CSR_TLBRSAVE); > + set_gcsr_hw_flag(LOONGARCH_CSR_TLBRELO0); > + set_gcsr_hw_flag(LOONGARCH_CSR_TLBRELO1); > + set_gcsr_hw_flag(LOONGARCH_CSR_TLBREHI); > + set_gcsr_hw_flag(LOONGARCH_CSR_TLBRPRMD); > + set_gcsr_hw_flag(LOONGARCH_CSR_DMWIN0); > + set_gcsr_hw_flag(LOONGARCH_CSR_DMWIN1); > + set_gcsr_hw_flag(LOONGARCH_CSR_DMWIN2); > + set_gcsr_hw_flag(LOONGARCH_CSR_DMWIN3); > + set_gcsr_hw_flag(LOONGARCH_CSR_MWPS); > + set_gcsr_hw_flag(LOONGARCH_CSR_FWPS); > + > + set_gcsr_sw_flag(LOONGARCH_CSR_IMPCTL1); > + set_gcsr_sw_flag(LOONGARCH_CSR_IMPCTL2); > + set_gcsr_sw_flag(LOONGARCH_CSR_MERRCTL); > + set_gcsr_sw_flag(LOONGARCH_CSR_MERRINFO1); > + set_gcsr_sw_flag(LOONGARCH_CSR_MERRINFO2); > + set_gcsr_sw_flag(LOONGARCH_CSR_MERRENTRY); > + set_gcsr_sw_flag(LOONGARCH_CSR_MERRERA); > + set_gcsr_sw_flag(LOONGARCH_CSR_MERRSAVE); > + set_gcsr_sw_flag(LOONGARCH_CSR_CTAG); > + set_gcsr_sw_flag(LOONGARCH_CSR_DEBUG); > + set_gcsr_sw_flag(LOONGARCH_CSR_DERA); > + set_gcsr_sw_flag(LOONGARCH_CSR_DESAVE); > + set_gcsr_sw_flag(LOONGARCH_CSR_PRCFG1); > + set_gcsr_sw_flag(LOONGARCH_CSR_PRCFG2); > + set_gcsr_sw_flag(LOONGARCH_CSR_PRCFG3); > + set_gcsr_sw_flag(LOONGARCH_CSR_PGD); > + set_gcsr_sw_flag(LOONGARCH_CSR_TINTCLR); > + > + set_gcsr_sw_flag(LOONGARCH_CSR_FWPS); > + set_gcsr_sw_flag(LOONGARCH_CSR_FWPC); > + set_gcsr_sw_flag(LOONGARCH_CSR_MWPS); > + set_gcsr_sw_flag(LOONGARCH_CSR_MWPC); > + > + set_gcsr_sw_flag(LOONGARCH_CSR_DB0ADDR); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB0MASK); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB0CTRL); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB0ASID); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB1ADDR); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB1MASK); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB1CTRL); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB1ASID); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB2ADDR); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB2MASK); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB2CTRL); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB2ASID); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB3ADDR); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB3MASK); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB3CTRL); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB3ASID); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB4ADDR); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB4MASK); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB4CTRL); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB4ASID); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB5ADDR); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB5MASK); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB5CTRL); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB5ASID); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB6ADDR); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB6MASK); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB6CTRL); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB6ASID); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB7ADDR); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB7MASK); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB7CTRL); > + set_gcsr_sw_flag(LOONGARCH_CSR_DB7ASID); > + > + set_gcsr_sw_flag(LOONGARCH_CSR_IB0ADDR); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB0MASK); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB0CTRL); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB0ASID); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB1ADDR); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB1MASK); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB1CTRL); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB1ASID); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB2ADDR); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB2MASK); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB2CTRL); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB2ASID); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB3ADDR); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB3MASK); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB3CTRL); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB3ASID); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB4ADDR); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB4MASK); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB4CTRL); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB4ASID); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB5ADDR); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB5MASK); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB5CTRL); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB5ASID); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB6ADDR); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB6MASK); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB6CTRL); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB6ASID); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB7ADDR); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB7MASK); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB7CTRL); > + set_gcsr_sw_flag(LOONGARCH_CSR_IB7ASID); > + > + set_gcsr_sw_flag(LOONGARCH_CSR_PERFCTRL0); > + set_gcsr_sw_flag(LOONGARCH_CSR_PERFCNTR0); > + set_gcsr_sw_flag(LOONGARCH_CSR_PERFCTRL1); > + set_gcsr_sw_flag(LOONGARCH_CSR_PERFCNTR1); > + set_gcsr_sw_flag(LOONGARCH_CSR_PERFCTRL2); > + set_gcsr_sw_flag(LOONGARCH_CSR_PERFCNTR2); > + set_gcsr_sw_flag(LOONGARCH_CSR_PERFCTRL3); > + set_gcsr_sw_flag(LOONGARCH_CSR_PERFCNTR3); > +} > + > +static int kvm_loongarch_env_init(void) > +{ > + struct kvm_context *context; > + int cpu, order; > + void *addr; > + > + vmcs = alloc_percpu(struct kvm_context); > + if (!vmcs) { > + pr_err("kvm: failed to allocate percpu kvm_context\n"); > + return -ENOMEM; > + } > + > + kvm_loongarch_ops = kzalloc(sizeof(*kvm_loongarch_ops), GFP_KERNEL); > + if (!kvm_loongarch_ops) > + return -ENOMEM; > + > + /* > + * There will be problem in world switch code if there > + * is page fault reenter, since pgd register is shared > + * between root kernel and kvm hypervisor. World switch > + * entry need be unmapped area, cannot be tlb mapped area. > + * In future if hw pagetable walking is supported, or there > + * is separate pgd registers between root kernel and kvm > + * hypervisor, copying about world switch code will not be used. > + */ > + > + order = get_order(kvm_vector_size + kvm_enter_guest_size); > + addr = (void *)__get_free_pages(GFP_KERNEL, order); > + if (!addr) { > + free_percpu(vmcs); > + return -ENOMEM; > + } > + > + memcpy(addr, kvm_vector_entry, kvm_vector_size); > + memcpy(addr + kvm_vector_size, kvm_enter_guest, kvm_enter_guest_size); > + flush_icache_range((unsigned long)addr, (unsigned long)addr + > + kvm_vector_size + kvm_enter_guest_size); > + kvm_loongarch_ops->guest_eentry = addr; > + kvm_loongarch_ops->enter_guest = addr + kvm_vector_size; > + kvm_loongarch_ops->page_order = order; > + > + vpid_mask = read_csr_gstat(); > + vpid_mask = (vpid_mask & CSR_GSTAT_GIDBIT) >> CSR_GSTAT_GIDBIT_SHIFT; > + if (vpid_mask) > + vpid_mask = GENMASK(vpid_mask - 1, 0); > + > + for_each_possible_cpu(cpu) { > + context = per_cpu_ptr(vmcs, cpu); > + context->vpid_cache = vpid_mask + 1; > + context->last_vcpu = NULL; > + } > + > + _kvm_init_fault(); > + _kvm_init_gcsr_flag(); > + > + return 0; > +} > + > +static void kvm_loongarch_env_exit(void) > +{ > + free_pages((unsigned long)kvm_loongarch_ops->guest_eentry, kvm_loongarch_ops->page_order); > + free_percpu(vmcs); > +} > + > +static int kvm_loongarch_init(void) > +{ > + int r; > + > + if (!cpu_has_lvz) > + return 0; > + > + r = kvm_loongarch_env_init(); > + if (r) > + return r; > + > + return kvm_init(sizeof(struct kvm_vcpu), 0, THIS_MODULE); > +} > + > +static void kvm_loongarch_exit(void) > +{ > + kvm_exit(); > + kvm_loongarch_env_exit(); > +} > + > +module_init(kvm_loongarch_init); > +module_exit(kvm_loongarch_exit);