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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 579A0C433FE for ; Sat, 19 Nov 2022 03:48:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232303AbiKSDsD (ORCPT ); Fri, 18 Nov 2022 22:48:03 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37372 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231864AbiKSDrG (ORCPT ); Fri, 18 Nov 2022 22:47:06 -0500 Received: from mail-pj1-x102c.google.com (mail-pj1-x102c.google.com [IPv6:2607:f8b0:4864:20::102c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5CB88BFF67; Fri, 18 Nov 2022 19:46:54 -0800 (PST) Received: by mail-pj1-x102c.google.com with SMTP id m14so6119104pji.0; Fri, 18 Nov 2022 19:46:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=eHfQ2xg7TSoUMJoNFBa3Rt6P1l7onXyfXsIWqOdHwnM=; b=p7wzlQcXuRaSIC6PeeE++lmR7XnrDFVT5YTYvnC4lth3AZIUOaMSkbgVGFQqOKOtz1 q/kfQynPzZLbZtNfW+R3Vs6Uprf/d1Ub4tp0hdsMRVMHNBNiXVVdoldrZN6vD7leJ46N ks3cVYzKSAEozqNDHUx0mQZnacluhbffwbLvSF58+MQkXZO3xFecGg9/xhPTfMm9oBVh lQHQ6zon6yB6Ve8DW352Gxi85rH6/MSzEdWS7rpv3BxYYvd5hbrFaGPGMSO24pUhqrLa nzZGkTN9VwCi+nojCKLDkLlUsvyPaaZR3NfA0KCUsn/xkOyfgRvz2dLA4GS/mGffCLcb fm7A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=eHfQ2xg7TSoUMJoNFBa3Rt6P1l7onXyfXsIWqOdHwnM=; b=cay6VYGaXIabscLFgUGcnVM4RmP0AiKFKfXXC7InbUBAr8Z5TaTSxMJq5zEl3UbZWE rzU8A7JltSZivoC/i391Y2a3VKz1wfun2LI30CgugS1wHp6vQ8i32WDM3fZBm5cGySGd eGNCPBA8ELx97GUcjiksctWk6nuHHM2wCv3QthElGyKO4/vrdtyTzoHP1XyXcDL8hxjs AygV52KgAmE42McMPh9i0DfmKZxNUA4pmEY/3dWQq2U7f5cqJoVVMb6UIgpOLG9aidCm bWUl3+8XgUv/C7Nlpb2oj4bxAmMz7uTKizcpH08a1ndlqmbCVK1wTX2F1KS8xTNEq3BW 2/iQ== X-Gm-Message-State: ANoB5plTy0SW38+qQJTnbAPBNc5SuPazyfdTU6eFUS1zgnh6VtoZQ6fY EAnSQs266Ufe/Z5UhEcZdIQ= X-Google-Smtp-Source: AA0mqf7Klwt7zuSS5Bc0Ck/gVlzg6wPps8ApHYVA792N13f9ScivIPhHN4zDt0S1CpfGCmrimlbxdw== X-Received: by 2002:a17:902:d88d:b0:186:cb27:4e01 with SMTP id b13-20020a170902d88d00b00186cb274e01mr2334256plz.139.1668829613896; Fri, 18 Nov 2022 19:46:53 -0800 (PST) Received: from ubuntu-Virtual-Machine.corp.microsoft.com ([2001:4898:80e8:38:f087:1794:92c5:f8f0]) by smtp.gmail.com with ESMTPSA id e5-20020a056a0000c500b005360da6b26bsm3913892pfj.159.2022.11.18.19.46.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 18 Nov 2022 19:46:53 -0800 (PST) From: Tianyu Lan To: luto@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, seanjc@google.com, pbonzini@redhat.com, jgross@suse.com, tiala@microsoft.com, kirill@shutemov.name, jiangshan.ljs@antgroup.com, peterz@infradead.org, ashish.kalra@amd.com, srutherford@google.com, akpm@linux-foundation.org, anshuman.khandual@arm.com, pawan.kumar.gupta@linux.intel.com, adrian.hunter@intel.com, daniel.sneddon@linux.intel.com, alexander.shishkin@linux.intel.com, sandipan.das@amd.com, ray.huang@amd.com, brijesh.singh@amd.com, michael.roth@amd.com, thomas.lendacky@amd.com, venu.busireddy@oracle.com, sterritt@google.com, tony.luck@intel.com, samitolvanen@google.com, fenghua.yu@intel.com Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-arch@vger.kernel.org Subject: [RFC PATCH V2 11/18] Drivers: hv: vmbus: Decrypt vmbus ring buffer Date: Fri, 18 Nov 2022 22:46:25 -0500 Message-Id: <20221119034633.1728632-12-ltykernel@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221119034633.1728632-1-ltykernel@gmail.com> References: <20221119034633.1728632-1-ltykernel@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-hyperv@vger.kernel.org From: Tianyu Lan The ring buffer is remapped in the hv_ringbuffer_init() and it should be with decrypt flag in order to share it with hypervisor in sev-snp enlightened guest. Signed-off-by: Tianyu Lan --- drivers/hv/ring_buffer.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/hv/ring_buffer.c b/drivers/hv/ring_buffer.c index 59a4aa86d1f3..391995c76be7 100644 --- a/drivers/hv/ring_buffer.c +++ b/drivers/hv/ring_buffer.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include "hyperv_vmbus.h" @@ -233,14 +234,18 @@ int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info, ring_info->ring_buffer = (struct hv_ring_buffer *) vmap(pages_wraparound, page_cnt * 2 - 1, VM_MAP, + hv_isolation_type_en_snp() ? + pgprot_decrypted(PAGE_KERNEL_NOENC) : PAGE_KERNEL); + if (hv_isolation_type_en_snp()) + memset(ring_info->ring_buffer, 0x00, page_cnt * PAGE_SIZE); + kfree(pages_wraparound); if (!ring_info->ring_buffer) return -ENOMEM; } - ring_info->ring_buffer->read_index = ring_info->ring_buffer->write_index = 0; -- 2.25.1