From patchwork Wed Jun 16 09:51:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yanan Wang X-Patchwork-Id: 12324681 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1D89AC48BE6 for ; Wed, 16 Jun 2021 09:52:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0ACA161356 for ; Wed, 16 Jun 2021 09:52:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232113AbhFPJy6 (ORCPT ); Wed, 16 Jun 2021 05:54:58 -0400 Received: from szxga02-in.huawei.com ([45.249.212.188]:4948 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232328AbhFPJyy (ORCPT ); Wed, 16 Jun 2021 05:54:54 -0400 Received: from dggemv711-chm.china.huawei.com (unknown [172.30.72.55]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4G4gQ91274z70PJ; Wed, 16 Jun 2021 17:49:37 +0800 (CST) Received: from dggpemm500023.china.huawei.com (7.185.36.83) by dggemv711-chm.china.huawei.com (10.1.198.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Wed, 16 Jun 2021 17:52:46 +0800 Received: from DESKTOP-TMVL5KK.china.huawei.com (10.174.187.128) by dggpemm500023.china.huawei.com (7.185.36.83) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Wed, 16 Jun 2021 17:52:45 +0800 From: Yanan Wang To: Marc Zyngier , Will Deacon , "Quentin Perret" , Alexandru Elisei , , , , CC: Catalin Marinas , James Morse , Julien Thierry , "Suzuki K Poulose" , Gavin Shan , , , , Yanan Wang Subject: [PATCH v6 1/4] KVM: arm64: Introduce cache maintenance callbacks for guest stage-2 Date: Wed, 16 Jun 2021 17:51:57 +0800 Message-ID: <20210616095200.38008-2-wangyanan55@huawei.com> X-Mailer: git-send-email 2.8.4.windows.1 In-Reply-To: <20210616095200.38008-1-wangyanan55@huawei.com> References: <20210616095200.38008-1-wangyanan55@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.187.128] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To dggpemm500023.china.huawei.com (7.185.36.83) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org To prepare for performing guest CMOs in the fault handlers in pgtable.c, introduce two cache maintenance callbacks in struct kvm_pgtable_mm_ops. The new callbacks are specific for guest stage-2, so they will only be initialized in 'struct kvm_pgtable_mm_ops kvm_s2_mm_ops'. Signed-off-by: Yanan Wang Reviewed-by: Fuad Tabba --- arch/arm64/include/asm/kvm_pgtable.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/arm64/include/asm/kvm_pgtable.h b/arch/arm64/include/asm/kvm_pgtable.h index c3674c47d48c..302eca32e0af 100644 --- a/arch/arm64/include/asm/kvm_pgtable.h +++ b/arch/arm64/include/asm/kvm_pgtable.h @@ -44,6 +44,11 @@ typedef u64 kvm_pte_t; * in the current context. * @virt_to_phys: Convert a virtual address mapped in the current context * into a physical address. + * @flush_dcache: Clean data cache for a guest page address range before + * creating the corresponding stage-2 mapping. + * @flush_icache: Invalidate instruction cache for a guest page address + * range before creating or updating the corresponding + * stage-2 mapping. */ struct kvm_pgtable_mm_ops { void* (*zalloc_page)(void *arg); @@ -54,6 +59,8 @@ struct kvm_pgtable_mm_ops { int (*page_count)(void *addr); void* (*phys_to_virt)(phys_addr_t phys); phys_addr_t (*virt_to_phys)(void *addr); + void (*flush_dcache)(void *addr, size_t size); + void (*flush_icache)(void *addr, size_t size); }; /**