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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9FB5DC369D1 for ; Fri, 25 Apr 2025 06:33:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=vc7IvitSvTFGyb/MOLTvZQtrYIUAGbu2AsxINhlGFEM=; b=Sp1GR3Q2/w20YqBu+BXiD8yeaB RFejvHE/i31EKoF4xALVgMLOUzGUbid8zkVckNMlTasHRI/obIsDGWsfd2RKo2TdAaVYjYPsn2sJR A8z144xDhji/QaoDeZbAHPU6PzfSyX0Hn0pS6TqTLjzVzXSLVfs9pyyDdDog7yEmqFezG9CFXiE0G N5gWQjta1AepXYQMwfzyrfiwFNJBkA3wE5pe7GrRRpEGfRpv9r/15dTfLBkP//LkrHE20djAEPjzr kYCYSpaLjbpYPZfZuiGz27vbOg9s7o0KJlJPahtSvxrsZSQbMShrR/GBkGC1e8cMefOhvF3x8POtS jemZIFEg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1u8Ccb-0000000G4v3-1gdd; Fri, 25 Apr 2025 06:33:13 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1u8Cak-0000000G4kC-1Kqu for linux-arm-kernel@lists.infradead.org; Fri, 25 Apr 2025 06:31:19 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id F284E435AD; Fri, 25 Apr 2025 06:31:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DB92CC4CEE4; Fri, 25 Apr 2025 06:31:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1745562677; bh=GIqQZ1dCRUDCHo4FeFANi+6joS0iyejlHj27N/oETyw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=ofAFvxRb3i1wsdHnPsZon3UzTa0HMqQEAs49Z8Whb/D8lHfG5gPiZatwVWz7pB/NW dp9oTLlRjQ9fVjS6J4KItmgYIvEwGX43Ns9FUTndfBIOUBIFCLzFFvlvs8MpE0FGo/ bwXc6kNmKTGh6CYL8sLsEoBumcqbn1l3cFyBPNiittw3T6RviJqRh0vBuDkl8CAiV6 bdcDIzSfiFbdAAbp2wkqpMfpccQgxQiU1BpHvZbCQHeK3ql4xFSHBThRB8+ZP35ZRY 3g3Vvn9ckTeisZyBBJytUOX9pIH415/yQ1zvu0pzExHTwVZBfwVYA8KXAQRM50hwOL ++ZgGFIEhlT8w== Date: Fri, 25 Apr 2025 06:31:15 +0000 From: Wei Liu To: Roman Kisel Cc: aleksander.lobakin@intel.com, andriy.shevchenko@linux.intel.com, arnd@arndb.de, bp@alien8.de, catalin.marinas@arm.com, corbet@lwn.net, dakr@kernel.org, dan.j.williams@intel.com, dave.hansen@linux.intel.com, decui@microsoft.com, gregkh@linuxfoundation.org, haiyangz@microsoft.com, hch@lst.de, hpa@zytor.com, James.Bottomley@hansenpartnership.com, Jonathan.Cameron@huawei.com, kys@microsoft.com, leon@kernel.org, lukas@wunner.de, luto@kernel.org, m.szyprowski@samsung.com, martin.petersen@oracle.com, mingo@redhat.com, peterz@infradead.org, quic_zijuhu@quicinc.com, robin.murphy@arm.com, tglx@linutronix.de, wei.liu@kernel.org, will@kernel.org, iommu@lists.linux.dev, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, x86@kernel.org, apais@microsoft.com, benhill@microsoft.com, bperkins@microsoft.com, sunilmut@microsoft.com Subject: Re: [PATCH hyperv-next 1/6] Documentation: hyperv: Confidential VMBus Message-ID: References: <20250409000835.285105-1-romank@linux.microsoft.com> <20250409000835.285105-2-romank@linux.microsoft.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250409000835.285105-2-romank@linux.microsoft.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250424_233118_375770_5F84FE88 X-CRM114-Status: GOOD ( 14.81 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Apr 08, 2025 at 05:08:30PM -0700, Roman Kisel wrote: > Define what the confidential VMBus is and describe what advantages > it offers on the capable hardware. > > Signed-off-by: Roman Kisel > --- > Documentation/virt/hyperv/vmbus.rst | 41 +++++++++++++++++++++++++++++ > 1 file changed, 41 insertions(+) > > diff --git a/Documentation/virt/hyperv/vmbus.rst b/Documentation/virt/hyperv/vmbus.rst > index 1dcef6a7fda3..f600e3d09800 100644 > --- a/Documentation/virt/hyperv/vmbus.rst > +++ b/Documentation/virt/hyperv/vmbus.rst > @@ -324,3 +324,44 @@ rescinded, neither Hyper-V nor Linux retains any state about > its previous existence. Such a device might be re-added later, > in which case it is treated as an entirely new device. See > vmbus_onoffer_rescind(). > + > +Confidential VMBus > +------------------ > + > +The confidential VMBus provides the control and data planes where > +the guest doesn't talk to either the hypervisor or the host. Instead, > +it relies on the trusted paravisor. The hardware (SNP or TDX) encrypts > +the guest memory and the register state also measuring the paravisor > +image via using the platform security processor to ensure trsuted and > +confidential computing. > + > +To support confidential communication with the paravisor, a VmBus client Please be consistent. In this document I see VMBus and VmBus. We should stick with only one form. Wei.