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Thu, 10 Apr 2025 16:55:10 +0000 Received: from DS7PR10MB5328.namprd10.prod.outlook.com ([fe80::ea13:c6c1:9956:b29c]) by DS7PR10MB5328.namprd10.prod.outlook.com ([fe80::ea13:c6c1:9956:b29c%6]) with mapi id 15.20.8632.017; Thu, 10 Apr 2025 16:55:10 +0000 Message-ID: <724f9f7d-137b-4cf5-aff5-bbb9727c23c1@oracle.com> Date: Thu, 10 Apr 2025 22:24:56 +0530 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH hyperv-next 1/6] Documentation: hyperv: Confidential VMBus To: Roman Kisel , 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 Cc: apais@microsoft.com, benhill@microsoft.com, bperkins@microsoft.com, sunilmut@microsoft.com References: <20250409000835.285105-1-romank@linux.microsoft.com> <20250409000835.285105-2-romank@linux.microsoft.com> Content-Language: en-US From: ALOK TIWARI In-Reply-To: <20250409000835.285105-2-romank@linux.microsoft.com> Content-Type: text/plain; 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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. > + typo trsuted -> trusted > +To support confidential communication with the paravisor, a VmBus client > +will first attempt to use regular, non-isolated mechanisms for communication. > +To do this, it must: Thanks, Alok