From patchwork Thu Aug 17 12:59:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: zhaotianrui X-Patchwork-Id: 13356422 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 DF8DEC2FC34 for ; Thu, 17 Aug 2023 13:00:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351147AbjHQNAX (ORCPT ); Thu, 17 Aug 2023 09:00:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45784 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1351106AbjHQNAI (ORCPT ); Thu, 17 Aug 2023 09:00:08 -0400 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 7752F30D1; Thu, 17 Aug 2023 06:00:06 -0700 (PDT) Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8AxqOjOGd5kVoYZAA--.16433S3; Thu, 17 Aug 2023 20:59:58 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8BxniPIGd5kmchcAA--.55665S19; Thu, 17 Aug 2023 20:59:58 +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 v19 17/30] LoongArch: KVM: Implement virtual machine tlb operations Date: Thu, 17 Aug 2023 20:59:38 +0800 Message-Id: <20230817125951.1126909-18-zhaotianrui@loongson.cn> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230817125951.1126909-1-zhaotianrui@loongson.cn> References: <20230817125951.1126909-1-zhaotianrui@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf8BxniPIGd5kmchcAA--.55665S19 X-CM-SenderInfo: p2kd03xldq233l6o00pqjv00gofq/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Implement LoongArch virtual machine tlb operations such as flush tlb by specific gpa parameter and flush all of the virt machines tlb. Reviewed-by: Bibo Mao Signed-off-by: Tianrui Zhao --- arch/loongarch/kvm/tlb.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 arch/loongarch/kvm/tlb.c diff --git a/arch/loongarch/kvm/tlb.c b/arch/loongarch/kvm/tlb.c new file mode 100644 index 000000000000..0bcbd80ac631 --- /dev/null +++ b/arch/loongarch/kvm/tlb.c @@ -0,0 +1,34 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2020-2023 Loongson Technology Corporation Limited + */ + +#include +#include +#include + +int kvm_flush_tlb_gpa(struct kvm_vcpu *vcpu, unsigned long gpa) +{ + unsigned long flags; + + local_irq_save(flags); + gpa &= (PAGE_MASK << 1); + invtlb(INVTLB_GID_ADDR, read_csr_gstat() & CSR_GSTAT_GID, gpa); + local_irq_restore(flags); + return 0; +} + +/** + * kvm_flush_tlb_all() - Flush all root TLB entries for + * guests. + * + * Invalidate all entries including GVA-->GPA and GPA-->HPA mappings. + */ +void kvm_flush_tlb_all(void) +{ + unsigned long flags; + + local_irq_save(flags); + invtlb_all(INVTLB_ALLGID, 0, 0); + local_irq_restore(flags); +}