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 X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 9A245C433E1 for ; Thu, 27 Aug 2020 08:24:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7AA7E20738 for ; Thu, 27 Aug 2020 08:24:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728341AbgH0IYC (ORCPT ); Thu, 27 Aug 2020 04:24:02 -0400 Received: from szxga07-in.huawei.com ([45.249.212.35]:45902 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726395AbgH0IXz (ORCPT ); Thu, 27 Aug 2020 04:23:55 -0400 Received: from DGGEMS402-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 6EE67404E57DEB67FD5B; Thu, 27 Aug 2020 16:23:53 +0800 (CST) Received: from huawei.com (10.174.187.31) by DGGEMS402-HUB.china.huawei.com (10.3.19.202) with Microsoft SMTP Server id 14.3.487.0; Thu, 27 Aug 2020 16:23:43 +0800 From: Yifei Jiang To: , , , , , , CC: , , , , , , , , , Yifei Jiang Subject: [PATCH RFC 2/2] target/kvm: Add interfaces needed for log dirty Date: Thu, 27 Aug 2020 16:22:51 +0800 Message-ID: <20200827082251.1591-3-jiangyifei@huawei.com> X-Mailer: git-send-email 2.26.2.windows.1 In-Reply-To: <20200827082251.1591-1-jiangyifei@huawei.com> References: <20200827082251.1591-1-jiangyifei@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain X-Originating-IP: [10.174.187.31] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add two interfaces of log dirty for kvm_main.c, and detele the interface kvm_vm_ioctl_get_dirty_log which is redundantly defined. CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT is added in defconfig. Signed-off-by: Yifei Jiang Signed-off-by: Yipeng Yin --- arch/riscv/configs/defconfig | 1 + arch/riscv/kvm/Kconfig | 1 + arch/riscv/kvm/mmu.c | 43 ++++++++++++++++++++++++++++++++++++ arch/riscv/kvm/vm.c | 6 ----- 4 files changed, 45 insertions(+), 6 deletions(-) diff --git a/arch/riscv/configs/defconfig b/arch/riscv/configs/defconfig index d36e1000bbd3..857d799672c2 100644 --- a/arch/riscv/configs/defconfig +++ b/arch/riscv/configs/defconfig @@ -19,6 +19,7 @@ CONFIG_SOC_VIRT=y CONFIG_SMP=y CONFIG_VIRTUALIZATION=y CONFIG_KVM=y +CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT=y CONFIG_HOTPLUG_CPU=y CONFIG_MODULES=y CONFIG_MODULE_UNLOAD=y diff --git a/arch/riscv/kvm/Kconfig b/arch/riscv/kvm/Kconfig index 2356dc52ebb3..91fcffc70e5d 100644 --- a/arch/riscv/kvm/Kconfig +++ b/arch/riscv/kvm/Kconfig @@ -26,6 +26,7 @@ config KVM select KVM_MMIO select HAVE_KVM_VCPU_ASYNC_IOCTL select SRCU + select KVM_GENERIC_DIRTYLOG_READ_PROTECT help Support hosting virtualized guest machines. diff --git a/arch/riscv/kvm/mmu.c b/arch/riscv/kvm/mmu.c index 88bce80ee983..df2a470c25e4 100644 --- a/arch/riscv/kvm/mmu.c +++ b/arch/riscv/kvm/mmu.c @@ -358,6 +358,43 @@ void stage2_wp_memory_region(struct kvm *kvm, int slot) kvm_flush_remote_tlbs(kvm); } +/** + * kvm_mmu_write_protect_pt_masked() - write protect dirty pages + * @kvm: The KVM pointer + * @slot: The memory slot associated with mask + * @gfn_offset: The gfn offset in memory slot + * @mask: The mask of dirty pages at offset 'gfn_offset' in this memory + * slot to be write protected + * + * Walks bits set in mask write protects the associated pte's. Caller must + * acquire kvm_mmu_lock. + */ +static void kvm_mmu_write_protect_pt_masked(struct kvm *kvm, + struct kvm_memory_slot *slot, + gfn_t gfn_offset, unsigned long mask) +{ + phys_addr_t base_gfn = slot->base_gfn + gfn_offset; + phys_addr_t start = (base_gfn + __ffs(mask)) << PAGE_SHIFT; + phys_addr_t end = (base_gfn + __fls(mask) + 1) << PAGE_SHIFT; + + stage2_wp_range(kvm, start, end); +} + +/* + * kvm_arch_mmu_enable_log_dirty_pt_masked - enable dirty logging for selected + * dirty pages. + * + * It calls kvm_mmu_write_protect_pt_masked to write protect selected pages to + * enable dirty logging for them. + */ +void kvm_arch_mmu_enable_log_dirty_pt_masked(struct kvm *kvm, + struct kvm_memory_slot *slot, + gfn_t gfn_offset, unsigned long mask) +{ + kvm_mmu_write_protect_pt_masked(kvm, slot, gfn_offset, mask); +} + + int stage2_ioremap(struct kvm *kvm, gpa_t gpa, phys_addr_t hpa, unsigned long size, bool writable) { @@ -433,6 +470,12 @@ void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot) { } +void kvm_arch_flush_remote_tlbs_memslot(struct kvm *kvm, + struct kvm_memory_slot *memslot) +{ + kvm_flush_remote_tlbs(kvm); +} + void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free) { } diff --git a/arch/riscv/kvm/vm.c b/arch/riscv/kvm/vm.c index 4f2498198cb5..f7405676903b 100644 --- a/arch/riscv/kvm/vm.c +++ b/arch/riscv/kvm/vm.c @@ -12,12 +12,6 @@ #include #include -int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) -{ - /* TODO: To be added later. */ - return -ENOTSUPP; -} - int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) { int r; -- 2.19.1