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([2404:f801:9000:1a:efea::75b]) by smtp.gmail.com with ESMTPSA id r12-20020a63ec4c000000b0046ae818b626sm896747pgj.30.2022.11.03.08.07.34 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 03 Nov 2022 08:07:45 -0700 (PDT) Message-ID: <900971fc-e8c0-b81b-8836-c416554a4c22@gmail.com> Date: Thu, 3 Nov 2022 23:07:34 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.4.1 Subject: Re: [PATCH 08/12] Drivers: hv: vmbus: Remove second way of mapping ring buffers Content-Language: en-US To: Michael Kelley , hpa@zytor.com, kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, luto@kernel.org, peterz@infradead.org, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, lpieralisi@kernel.org, robh@kernel.org, kw@linux.com, bhelgaas@google.com, arnd@arndb.de, hch@infradead.org, m.szyprowski@samsung.com, robin.murphy@arm.com, thomas.lendacky@amd.com, brijesh.singh@amd.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, Tianyu.Lan@microsoft.com, kirill.shutemov@linux.intel.com, sathyanarayanan.kuppuswamy@linux.intel.com, ak@linux.intel.com, isaku.yamahata@intel.com, dan.j.williams@intel.com, jane.chu@oracle.com, seanjc@google.com, tony.luck@intel.com, x86@kernel.org, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org, netdev@vger.kernel.org, linux-pci@vger.kernel.org, linux-arch@vger.kernel.org, iommu@lists.linux.dev References: <1666288635-72591-1-git-send-email-mikelley@microsoft.com> <1666288635-72591-9-git-send-email-mikelley@microsoft.com> From: Tianyu Lan In-Reply-To: <1666288635-72591-9-git-send-email-mikelley@microsoft.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org On 10/21/2022 1:57 AM, Michael Kelley wrote: > With changes to how Hyper-V guest VMs flip memory between private > (encrypted) and shared (decrypted), it's no longer necessary to > have separate code paths for mapping VMBus ring buffers for > for normal VMs and for Confidential VMs. > > As such, remove the code path that uses vmap_pfn(), and set > the protection flags argument to vmap() to account for the > difference between normal and Confidential VMs. > > Signed-off-by: Michael Kelley > --- Reviewed-by: Tianyu Lan