From patchwork Wed Apr 14 14:49:39 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tianyu Lan X-Patchwork-Id: 12203053 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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,USER_AGENT_GIT autolearn=unavailable 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 EC3C3C43470 for ; Wed, 14 Apr 2021 14:51:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C6C7B6117A for ; Wed, 14 Apr 2021 14:51:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1352113AbhDNOvX (ORCPT ); Wed, 14 Apr 2021 10:51:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38904 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1351963AbhDNOuw (ORCPT ); Wed, 14 Apr 2021 10:50:52 -0400 Received: from mail-pl1-x636.google.com (mail-pl1-x636.google.com [IPv6:2607:f8b0:4864:20::636]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AB1F2C06138D; Wed, 14 Apr 2021 07:50:30 -0700 (PDT) Received: by mail-pl1-x636.google.com with SMTP id u15so1688487plf.10; Wed, 14 Apr 2021 07:50:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=CewzcGN2queQHJd+J82WZLFtEsY18cNfiGHIrQj3GfM=; b=nOk4uGV2612icoE6KiiMnihVY5JHClv+KaiNAxHeX6msxOQj9xeFgeyXgzuV9Sd7Ij 3EGstiuG7E5ZaMqZazQ8zFoKTzoT62iMzgmBH+tZh+iYpEEsK600XCCcKCclZh0Y0x/u lPI4sDQZdZAMWqD+sOUOmLSztUBF0emqbSbT/bkw4pOBBCkruQo/ok2VzdifznwsKJMs ocsgxtRZuZhwa/4H3uMNQQH/MJK+ZGYBL5Une8lbE2Hi2dVG9kDPFVwgbdYojKKilNwO hZojnsV4Uidmr/W8cT1MCoZwuTcUd6+620Huo4X0ZKIUTvMpEIF6giQ2Vs7uJP0RlbHX V1IA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=CewzcGN2queQHJd+J82WZLFtEsY18cNfiGHIrQj3GfM=; b=A2zSNmAY/eNh5iTFCqMjc0M/4kLDDRmqA3/NStBj5XrJAmzjjRSqHDnLv4z1u5OikC ZziqdwZTqEM1Nhfq5+ogcI+tnzhPFInfkSrKi4LiTgPE8LT7rxqKylt8GS5zZNDWA7Ac bG4s8GjJiXwuYREhwknBxWvks0LxqvnAPIqLtEbrlF0XCsm/85uhVW7588aWZ9PJbFih r+5CFLd05zckaqfqYhFPrOx8pP7I3fSVFH1bR4N/R+4/jX3T972kHGWFzHBWgeuy3Top iDhq1zrPx8snO8fl7hJxuiX6cbd0F2uCuCQinE12Zjfd35F0mVtnYtnuRNdjjXQ0guPI +RyQ== X-Gm-Message-State: AOAM5320WSVKha8CREFKYGwvPHXJSx8RlmNzdB4gp5i3eNeOneaLgjsg fFWY45IQBzE0lOM+VcgNrnk= X-Google-Smtp-Source: ABdhPJwbB1PldwXbeyiSuCQkyOEtifm++hxPqnW8Qh9Ekcj5s31E29ArK58tbba9T8p/t1IP5sOX7w== X-Received: by 2002:a17:90a:5306:: with SMTP id x6mr4089960pjh.39.1618411830278; Wed, 14 Apr 2021 07:50:30 -0700 (PDT) Received: from ubuntu-Virtual-Machine.corp.microsoft.com ([2001:4898:80e8:35:ebad:12c1:f579:e332]) by smtp.gmail.com with ESMTPSA id w67sm17732522pgb.87.2021.04.14.07.50.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Apr 2021 07:50:29 -0700 (PDT) From: Tianyu Lan To: kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, arnd@arndb.de, akpm@linux-foundation.org, gregkh@linuxfoundation.org, konrad.wilk@oracle.com, hch@lst.de, m.szyprowski@samsung.com, robin.murphy@arm.com, joro@8bytes.org, will@kernel.org, davem@davemloft.net, kuba@kernel.org, jejb@linux.ibm.com, martin.petersen@oracle.com Cc: Tianyu Lan , iommu@lists.linux-foundation.org, linux-arch@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-scsi@vger.kernel.org, netdev@vger.kernel.org, vkuznets@redhat.com, thomas.lendacky@amd.com, brijesh.singh@amd.com, sunilmut@microsoft.com Subject: [Resend RFC PATCH V2 06/12] HV/Vmbus: Add SNP support for VMbus channel initiate message Date: Wed, 14 Apr 2021 10:49:39 -0400 Message-Id: <20210414144945.3460554-7-ltykernel@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210414144945.3460554-1-ltykernel@gmail.com> References: <20210414144945.3460554-1-ltykernel@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-State: RFC From: Tianyu Lan The physical address of monitor pages in the CHANNELMSG_INITIATE_CONTACT msg should be in the extra address space for SNP support and these pages also should be accessed via the extra address space inside Linux guest and remap the extra address by ioremap function. Signed-off-by: Tianyu Lan --- drivers/hv/connection.c | 62 +++++++++++++++++++++++++++++++++++++++ drivers/hv/hyperv_vmbus.h | 1 + 2 files changed, 63 insertions(+) diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c index 79bca653dce9..a0be9c11d737 100644 --- a/drivers/hv/connection.c +++ b/drivers/hv/connection.c @@ -101,6 +101,12 @@ int vmbus_negotiate_version(struct vmbus_channel_msginfo *msginfo, u32 version) msg->monitor_page1 = virt_to_phys(vmbus_connection.monitor_pages[0]); msg->monitor_page2 = virt_to_phys(vmbus_connection.monitor_pages[1]); + + if (hv_isolation_type_snp()) { + msg->monitor_page1 += ms_hyperv.shared_gpa_boundary; + msg->monitor_page2 += ms_hyperv.shared_gpa_boundary; + } + msg->target_vcpu = hv_cpu_number_to_vp_number(VMBUS_CONNECT_CPU); /* @@ -145,6 +151,29 @@ int vmbus_negotiate_version(struct vmbus_channel_msginfo *msginfo, u32 version) return -ECONNREFUSED; } + if (hv_isolation_type_snp()) { + vmbus_connection.monitor_pages_va[0] + = vmbus_connection.monitor_pages[0]; + vmbus_connection.monitor_pages[0] + = ioremap_cache(msg->monitor_page1, HV_HYP_PAGE_SIZE); + if (!vmbus_connection.monitor_pages[0]) + return -ENOMEM; + + vmbus_connection.monitor_pages_va[1] + = vmbus_connection.monitor_pages[1]; + vmbus_connection.monitor_pages[1] + = ioremap_cache(msg->monitor_page2, HV_HYP_PAGE_SIZE); + if (!vmbus_connection.monitor_pages[1]) { + vunmap(vmbus_connection.monitor_pages[0]); + return -ENOMEM; + } + + memset(vmbus_connection.monitor_pages[0], 0x00, + HV_HYP_PAGE_SIZE); + memset(vmbus_connection.monitor_pages[1], 0x00, + HV_HYP_PAGE_SIZE); + } + return ret; } @@ -156,6 +185,7 @@ int vmbus_connect(void) struct vmbus_channel_msginfo *msginfo = NULL; int i, ret = 0; __u32 version; + u64 pfn[2]; /* Initialize the vmbus connection */ vmbus_connection.conn_state = CONNECTING; @@ -213,6 +243,16 @@ int vmbus_connect(void) goto cleanup; } + if (hv_isolation_type_snp()) { + pfn[0] = virt_to_hvpfn(vmbus_connection.monitor_pages[0]); + pfn[1] = virt_to_hvpfn(vmbus_connection.monitor_pages[1]); + if (hv_mark_gpa_visibility(2, pfn, + VMBUS_PAGE_VISIBLE_READ_WRITE)) { + ret = -EFAULT; + goto cleanup; + } + } + msginfo = kzalloc(sizeof(*msginfo) + sizeof(struct vmbus_channel_initiate_contact), GFP_KERNEL); @@ -279,6 +319,8 @@ int vmbus_connect(void) void vmbus_disconnect(void) { + u64 pfn[2]; + /* * First send the unload request to the host. */ @@ -298,6 +340,26 @@ void vmbus_disconnect(void) vmbus_connection.int_page = NULL; } + if (hv_isolation_type_snp()) { + if (vmbus_connection.monitor_pages_va[0]) { + vunmap(vmbus_connection.monitor_pages[0]); + vmbus_connection.monitor_pages[0] + = vmbus_connection.monitor_pages_va[0]; + vmbus_connection.monitor_pages_va[0] = NULL; + } + + if (vmbus_connection.monitor_pages_va[1]) { + vunmap(vmbus_connection.monitor_pages[1]); + vmbus_connection.monitor_pages[1] + = vmbus_connection.monitor_pages_va[1]; + vmbus_connection.monitor_pages_va[1] = NULL; + } + + pfn[0] = virt_to_hvpfn(vmbus_connection.monitor_pages[0]); + pfn[1] = virt_to_hvpfn(vmbus_connection.monitor_pages[1]); + hv_mark_gpa_visibility(2, pfn, VMBUS_PAGE_NOT_VISIBLE); + } + hv_free_hyperv_page((unsigned long)vmbus_connection.monitor_pages[0]); hv_free_hyperv_page((unsigned long)vmbus_connection.monitor_pages[1]); vmbus_connection.monitor_pages[0] = NULL; diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h index 9416e09ebd58..0778add21a9c 100644 --- a/drivers/hv/hyperv_vmbus.h +++ b/drivers/hv/hyperv_vmbus.h @@ -240,6 +240,7 @@ struct vmbus_connection { * is child->parent notification */ struct hv_monitor_page *monitor_pages[2]; + void *monitor_pages_va[2]; struct list_head chn_msg_list; spinlock_t channelmsg_lock;