From patchwork Wed Oct 6 06:36:44 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tianyu Lan X-Patchwork-Id: 12538711 X-Patchwork-Delegate: kuba@kernel.org 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8F52CC433FE for ; Wed, 6 Oct 2021 06:37:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 74B0D60F70 for ; Wed, 6 Oct 2021 06:37:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237615AbhJFGjO (ORCPT ); Wed, 6 Oct 2021 02:39:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40676 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237441AbhJFGiw (ORCPT ); Wed, 6 Oct 2021 02:38:52 -0400 Received: from mail-pg1-x52a.google.com (mail-pg1-x52a.google.com [IPv6:2607:f8b0:4864:20::52a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1EF45C061753; Tue, 5 Oct 2021 23:37:01 -0700 (PDT) Received: by mail-pg1-x52a.google.com with SMTP id q201so1562769pgq.12; Tue, 05 Oct 2021 23:37:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=gk3y4o1zrzwzioXRZ+sUIEPrVPIRY8dyF+dFv2fpgHU=; b=RfrGcxAfl3guN11qnVS9QwZhjd914k9yzaNTf+UVckuU5Oyb6M9LaXHeXSeCiD0A7Q boiN7hUrNgqEkNDU2y82kkkleMOlHHbCGTgiqUXxct2IYK1w1WLQ8wBuCj0mk0eVUf+t xxL8jYc1ZhhenEkszd9whQZBDT1B+Z5dGfU4LsxTCF+aKtQhdv7Rk84Nf5bj9iveVS4h qIS5PoCZ2q+gq5iRcT70wi9HmU62CURRiHhHrsHS09UF6HYDUUzlm0/erQwplhoq5cO/ Gl6evVo+RP8NUhNOUEsMiQF0OV5xHShcFwY7PFbXJNWd5uZ7h4unzAG0INfVpwsUUayL M5ww== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=gk3y4o1zrzwzioXRZ+sUIEPrVPIRY8dyF+dFv2fpgHU=; b=as6r0+sRJdYAkvLqII3BDkczpMtj8z14TTe7uCoqgEmUL6bn/JUxc108AQ4MeVNBeZ qYjFnT6rKB9AFvpOQSc5bL9vV9bxJDFdp1J4Vvv7a5u2LlTk0KXu6pJlXKet9w3A+v6r 2p5GwSJpuSPYvNoEyZVuF8SPcyX9yHahuFLv7t1V8M5ykY77EvepUZ0Lwq9FDwBCUTBg nYxkAwQiarsWygF+fuagC8AfrbNLaM38s5G8DaD5SjGqnjQN8HKm86vqEMNZNlZYErHp B2I9+UBUMbTh2mg8GxBMeFAgOwGVo7UdTB6MttSGB5JA/GzTumeNDdk+jbORCIGXiQU/ bObA== X-Gm-Message-State: AOAM5309bNxA6Dn12Ols9woctPcCdYjavuNiQt+SJ0gTOX6s+OrYfl4Z nDFugxXueEntvXtC8hY+vcY= X-Google-Smtp-Source: ABdhPJxcCWVZGCDq6ULp1XWkbcqqjrfdAhqNiSZFwCyVMf/NOhM/stqOIEuNtauqgWB84OvK6w6ufQ== X-Received: by 2002:a62:1683:0:b0:3f3:814f:4367 with SMTP id 125-20020a621683000000b003f3814f4367mr34880454pfw.68.1633502220609; Tue, 05 Oct 2021 23:37:00 -0700 (PDT) Received: from ubuntu-Virtual-Machine.corp.microsoft.com ([2001:4898:80e8:37:357b:c418:cfef:30b1]) by smtp.gmail.com with ESMTPSA id l185sm19886413pfd.29.2021.10.05.23.36.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 05 Oct 2021 23:37:00 -0700 (PDT) From: Tianyu Lan To: kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, davem@davemloft.net, kuba@kernel.org, gregkh@linuxfoundation.org, arnd@arndb.de, jroedel@suse.de, brijesh.singh@amd.com, Tianyu.Lan@microsoft.com, thomas.lendacky@amd.com, pgonda@google.com, akpm@linux-foundation.org, kirill.shutemov@linux.intel.com, rppt@kernel.org, tj@kernel.org, aneesh.kumar@linux.ibm.com, saravanand@fb.com, hannes@cmpxchg.org, rientjes@google.com, michael.h.kelley@microsoft.com Cc: linux-arch@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, vkuznets@redhat.com, konrad.wilk@oracle.com, hch@lst.de, robin.murphy@arm.com, joro@8bytes.org, parri.andrea@gmail.com, dave.hansen@intel.com Subject: [PATCH V7 4/9] Drivers: hv: vmbus: Mark vmbus ring buffer visible to host in Isolation VM Date: Wed, 6 Oct 2021 02:36:44 -0400 Message-Id: <20211006063651.1124737-5-ltykernel@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211006063651.1124737-1-ltykernel@gmail.com> References: <20211006063651.1124737-1-ltykernel@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Tianyu Lan Mark vmbus ring buffer visible with set_memory_decrypted() when establish gpadl handle. Signed-off-by: Tianyu Lan --- Change since v5: * Replace HVPFN_UP() with PFN_UP() in the __vmbus_establish_gpadl() * Remove unused variable gpadl in the __vmbus_open() and vmbus_close_ internal() * Clean gpadl_handle in the vmbus_teardown_gpadl(). Change since v4 * Change gpadl handle in netvsc and uio driver from u32 to struct vmbus_gpadl. * Change vmbus_establish_gpadl()'s gpadl_handle parameter to vmbus_gpadl data structure. Change since v3: * Change vmbus_teardown_gpadl() parameter and put gpadl handle, buffer and buffer size in the struct vmbus_gpadl. --- drivers/hv/channel.c | 53 +++++++++++++++++++++++---------- drivers/net/hyperv/hyperv_net.h | 5 ++-- drivers/net/hyperv/netvsc.c | 15 +++++----- drivers/uio/uio_hv_generic.c | 18 +++++------ include/linux/hyperv.h | 12 ++++++-- 5 files changed, 65 insertions(+), 38 deletions(-) diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c index f3761c73b074..b37ff4a39224 100644 --- a/drivers/hv/channel.c +++ b/drivers/hv/channel.c @@ -17,6 +17,7 @@ #include #include #include +#include #include #include @@ -456,7 +457,7 @@ static int create_gpadl_header(enum hv_gpadl_type type, void *kbuffer, static int __vmbus_establish_gpadl(struct vmbus_channel *channel, enum hv_gpadl_type type, void *kbuffer, u32 size, u32 send_offset, - u32 *gpadl_handle) + struct vmbus_gpadl *gpadl) { struct vmbus_channel_gpadl_header *gpadlmsg; struct vmbus_channel_gpadl_body *gpadl_body; @@ -474,6 +475,15 @@ static int __vmbus_establish_gpadl(struct vmbus_channel *channel, if (ret) return ret; + ret = set_memory_decrypted((unsigned long)kbuffer, + PFN_UP(size)); + if (ret) { + dev_warn(&channel->device_obj->device, + "Failed to set host visibility for new GPADL %d.\n", + ret); + return ret; + } + init_completion(&msginfo->waitevent); msginfo->waiting_channel = channel; @@ -537,7 +547,10 @@ static int __vmbus_establish_gpadl(struct vmbus_channel *channel, } /* At this point, we received the gpadl created msg */ - *gpadl_handle = gpadlmsg->gpadl; + gpadl->gpadl_handle = gpadlmsg->gpadl; + gpadl->buffer = kbuffer; + gpadl->size = size; + cleanup: spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); @@ -549,6 +562,11 @@ static int __vmbus_establish_gpadl(struct vmbus_channel *channel, } kfree(msginfo); + + if (ret) + set_memory_encrypted((unsigned long)kbuffer, + PFN_UP(size)); + return ret; } @@ -561,10 +579,10 @@ static int __vmbus_establish_gpadl(struct vmbus_channel *channel, * @gpadl_handle: some funky thing */ int vmbus_establish_gpadl(struct vmbus_channel *channel, void *kbuffer, - u32 size, u32 *gpadl_handle) + u32 size, struct vmbus_gpadl *gpadl) { return __vmbus_establish_gpadl(channel, HV_GPADL_BUFFER, kbuffer, size, - 0U, gpadl_handle); + 0U, gpadl); } EXPORT_SYMBOL_GPL(vmbus_establish_gpadl); @@ -675,7 +693,7 @@ static int __vmbus_open(struct vmbus_channel *newchannel, goto error_clean_ring; /* Establish the gpadl for the ring buffer */ - newchannel->ringbuffer_gpadlhandle = 0; + newchannel->ringbuffer_gpadlhandle.gpadl_handle = 0; err = __vmbus_establish_gpadl(newchannel, HV_GPADL_RING, page_address(newchannel->ringbuffer_page), @@ -701,7 +719,8 @@ static int __vmbus_open(struct vmbus_channel *newchannel, open_msg->header.msgtype = CHANNELMSG_OPENCHANNEL; open_msg->openid = newchannel->offermsg.child_relid; open_msg->child_relid = newchannel->offermsg.child_relid; - open_msg->ringbuffer_gpadlhandle = newchannel->ringbuffer_gpadlhandle; + open_msg->ringbuffer_gpadlhandle + = newchannel->ringbuffer_gpadlhandle.gpadl_handle; /* * The unit of ->downstream_ringbuffer_pageoffset is HV_HYP_PAGE and * the unit of ->ringbuffer_send_offset (i.e. send_pages) is PAGE, so @@ -759,8 +778,7 @@ static int __vmbus_open(struct vmbus_channel *newchannel, error_free_info: kfree(open_info); error_free_gpadl: - vmbus_teardown_gpadl(newchannel, newchannel->ringbuffer_gpadlhandle); - newchannel->ringbuffer_gpadlhandle = 0; + vmbus_teardown_gpadl(newchannel, &newchannel->ringbuffer_gpadlhandle); error_clean_ring: hv_ringbuffer_cleanup(&newchannel->outbound); hv_ringbuffer_cleanup(&newchannel->inbound); @@ -806,7 +824,7 @@ EXPORT_SYMBOL_GPL(vmbus_open); /* * vmbus_teardown_gpadl -Teardown the specified GPADL handle */ -int vmbus_teardown_gpadl(struct vmbus_channel *channel, u32 gpadl_handle) +int vmbus_teardown_gpadl(struct vmbus_channel *channel, struct vmbus_gpadl *gpadl) { struct vmbus_channel_gpadl_teardown *msg; struct vmbus_channel_msginfo *info; @@ -825,7 +843,7 @@ int vmbus_teardown_gpadl(struct vmbus_channel *channel, u32 gpadl_handle) msg->header.msgtype = CHANNELMSG_GPADL_TEARDOWN; msg->child_relid = channel->offermsg.child_relid; - msg->gpadl = gpadl_handle; + msg->gpadl = gpadl->gpadl_handle; spin_lock_irqsave(&vmbus_connection.channelmsg_lock, flags); list_add_tail(&info->msglistentry, @@ -845,6 +863,8 @@ int vmbus_teardown_gpadl(struct vmbus_channel *channel, u32 gpadl_handle) wait_for_completion(&info->waitevent); + gpadl->gpadl_handle = 0; + post_msg_err: /* * If the channel has been rescinded; @@ -859,6 +879,12 @@ int vmbus_teardown_gpadl(struct vmbus_channel *channel, u32 gpadl_handle) spin_unlock_irqrestore(&vmbus_connection.channelmsg_lock, flags); kfree(info); + + ret = set_memory_encrypted((unsigned long)gpadl->buffer, + PFN_UP(gpadl->size)); + if (ret) + pr_warn("Fail to set mem host visibility in GPADL teardown %d.\n", ret); + return ret; } EXPORT_SYMBOL_GPL(vmbus_teardown_gpadl); @@ -933,9 +959,8 @@ static int vmbus_close_internal(struct vmbus_channel *channel) } /* Tear down the gpadl for the channel's ring buffer */ - else if (channel->ringbuffer_gpadlhandle) { - ret = vmbus_teardown_gpadl(channel, - channel->ringbuffer_gpadlhandle); + else if (channel->ringbuffer_gpadlhandle.gpadl_handle) { + ret = vmbus_teardown_gpadl(channel, &channel->ringbuffer_gpadlhandle); if (ret) { pr_err("Close failed: teardown gpadl return %d\n", ret); /* @@ -943,8 +968,6 @@ static int vmbus_close_internal(struct vmbus_channel *channel) * it is perhaps better to leak memory. */ } - - channel->ringbuffer_gpadlhandle = 0; } if (!ret) diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h index bc48855dff10..315278a7cf88 100644 --- a/drivers/net/hyperv/hyperv_net.h +++ b/drivers/net/hyperv/hyperv_net.h @@ -1075,14 +1075,15 @@ struct netvsc_device { /* Receive buffer allocated by us but manages by NetVSP */ void *recv_buf; u32 recv_buf_size; /* allocated bytes */ - u32 recv_buf_gpadl_handle; + struct vmbus_gpadl recv_buf_gpadl_handle; u32 recv_section_cnt; u32 recv_section_size; u32 recv_completion_cnt; /* Send buffer allocated by us */ void *send_buf; - u32 send_buf_gpadl_handle; + u32 send_buf_size; + struct vmbus_gpadl send_buf_gpadl_handle; u32 send_section_cnt; u32 send_section_size; unsigned long *send_section_map; diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c index 7bd935412853..396bc1c204e6 100644 --- a/drivers/net/hyperv/netvsc.c +++ b/drivers/net/hyperv/netvsc.c @@ -278,9 +278,9 @@ static void netvsc_teardown_recv_gpadl(struct hv_device *device, { int ret; - if (net_device->recv_buf_gpadl_handle) { + if (net_device->recv_buf_gpadl_handle.gpadl_handle) { ret = vmbus_teardown_gpadl(device->channel, - net_device->recv_buf_gpadl_handle); + &net_device->recv_buf_gpadl_handle); /* If we failed here, we might as well return and have a leak * rather than continue and a bugchk @@ -290,7 +290,6 @@ static void netvsc_teardown_recv_gpadl(struct hv_device *device, "unable to teardown receive buffer's gpadl\n"); return; } - net_device->recv_buf_gpadl_handle = 0; } } @@ -300,9 +299,9 @@ static void netvsc_teardown_send_gpadl(struct hv_device *device, { int ret; - if (net_device->send_buf_gpadl_handle) { + if (net_device->send_buf_gpadl_handle.gpadl_handle) { ret = vmbus_teardown_gpadl(device->channel, - net_device->send_buf_gpadl_handle); + &net_device->send_buf_gpadl_handle); /* If we failed here, we might as well return and have a leak * rather than continue and a bugchk @@ -312,7 +311,6 @@ static void netvsc_teardown_send_gpadl(struct hv_device *device, "unable to teardown send buffer's gpadl\n"); return; } - net_device->send_buf_gpadl_handle = 0; } } @@ -380,7 +378,7 @@ static int netvsc_init_buf(struct hv_device *device, memset(init_packet, 0, sizeof(struct nvsp_message)); init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF; init_packet->msg.v1_msg.send_recv_buf. - gpadl_handle = net_device->recv_buf_gpadl_handle; + gpadl_handle = net_device->recv_buf_gpadl_handle.gpadl_handle; init_packet->msg.v1_msg. send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID; @@ -463,6 +461,7 @@ static int netvsc_init_buf(struct hv_device *device, ret = -ENOMEM; goto cleanup; } + net_device->send_buf_size = buf_size; /* Establish the gpadl handle for this buffer on this * channel. Note: This call uses the vmbus connection rather @@ -482,7 +481,7 @@ static int netvsc_init_buf(struct hv_device *device, memset(init_packet, 0, sizeof(struct nvsp_message)); init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_SEND_BUF; init_packet->msg.v1_msg.send_send_buf.gpadl_handle = - net_device->send_buf_gpadl_handle; + net_device->send_buf_gpadl_handle.gpadl_handle; init_packet->msg.v1_msg.send_send_buf.id = NETVSC_SEND_BUFFER_ID; trace_nvsp_send(ndev, init_packet); diff --git a/drivers/uio/uio_hv_generic.c b/drivers/uio/uio_hv_generic.c index 652fe2547587..c08a6cfd119f 100644 --- a/drivers/uio/uio_hv_generic.c +++ b/drivers/uio/uio_hv_generic.c @@ -58,11 +58,11 @@ struct hv_uio_private_data { atomic_t refcnt; void *recv_buf; - u32 recv_gpadl; + struct vmbus_gpadl recv_gpadl; char recv_name[32]; /* "recv_4294967295" */ void *send_buf; - u32 send_gpadl; + struct vmbus_gpadl send_gpadl; char send_name[32]; }; @@ -179,15 +179,13 @@ hv_uio_new_channel(struct vmbus_channel *new_sc) static void hv_uio_cleanup(struct hv_device *dev, struct hv_uio_private_data *pdata) { - if (pdata->send_gpadl) { - vmbus_teardown_gpadl(dev->channel, pdata->send_gpadl); - pdata->send_gpadl = 0; + if (pdata->send_gpadl.gpadl_handle) { + vmbus_teardown_gpadl(dev->channel, &pdata->send_gpadl); vfree(pdata->send_buf); } - if (pdata->recv_gpadl) { - vmbus_teardown_gpadl(dev->channel, pdata->recv_gpadl); - pdata->recv_gpadl = 0; + if (pdata->recv_gpadl.gpadl_handle) { + vmbus_teardown_gpadl(dev->channel, &pdata->recv_gpadl); vfree(pdata->recv_buf); } } @@ -303,7 +301,7 @@ hv_uio_probe(struct hv_device *dev, /* put Global Physical Address Label in name */ snprintf(pdata->recv_name, sizeof(pdata->recv_name), - "recv:%u", pdata->recv_gpadl); + "recv:%u", pdata->recv_gpadl.gpadl_handle); pdata->info.mem[RECV_BUF_MAP].name = pdata->recv_name; pdata->info.mem[RECV_BUF_MAP].addr = (uintptr_t)pdata->recv_buf; @@ -324,7 +322,7 @@ hv_uio_probe(struct hv_device *dev, } snprintf(pdata->send_name, sizeof(pdata->send_name), - "send:%u", pdata->send_gpadl); + "send:%u", pdata->send_gpadl.gpadl_handle); pdata->info.mem[SEND_BUF_MAP].name = pdata->send_name; pdata->info.mem[SEND_BUF_MAP].addr = (uintptr_t)pdata->send_buf; diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index ddc8713ce57b..a9e0bc3b1511 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -803,6 +803,12 @@ struct vmbus_device { #define VMBUS_DEFAULT_MAX_PKT_SIZE 4096 +struct vmbus_gpadl { + u32 gpadl_handle; + u32 size; + void *buffer; +}; + struct vmbus_channel { struct list_head listentry; @@ -822,7 +828,7 @@ struct vmbus_channel { bool rescind_ref; /* got rescind msg, got channel reference */ struct completion rescind_event; - u32 ringbuffer_gpadlhandle; + struct vmbus_gpadl ringbuffer_gpadlhandle; /* Allocated memory for ring buffer */ struct page *ringbuffer_page; @@ -1192,10 +1198,10 @@ extern int vmbus_sendpacket_mpb_desc(struct vmbus_channel *channel, extern int vmbus_establish_gpadl(struct vmbus_channel *channel, void *kbuffer, u32 size, - u32 *gpadl_handle); + struct vmbus_gpadl *gpadl); extern int vmbus_teardown_gpadl(struct vmbus_channel *channel, - u32 gpadl_handle); + struct vmbus_gpadl *gpadl); void vmbus_reset_channel_cb(struct vmbus_channel *channel);