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[172.254.253.57]) by smtp.gmail.com with ESMTPSA id h2sm11881672qkf.106.2021.11.02.03.01.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 02 Nov 2021 03:01:52 -0700 (PDT) Subject: Re: [PATCH v2] hvf: arm: Ignore cache operations on MMIO To: Peter Maydell References: <20211026071241.74889-1-agraf@csgraf.de> <0cd15efa-d00e-fa85-47c7-6e3d11058cf4@linaro.org> From: Richard Henderson Message-ID: <47d35b2d-bfbf-6ee8-a004-ad74e713db13@linaro.org> Date: Tue, 2 Nov 2021 06:01:50 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.13.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=2607:f8b0:4864:20::82e; envelope-from=richard.henderson@linaro.org; helo=mail-qt1-x82e.google.com X-Spam_score_int: -31 X-Spam_score: -3.2 X-Spam_bar: --- X-Spam_report: (-3.2 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-1.14, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kettenis@openbsd.org, =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= , Cameron Esfahani , qemu-devel@nongnu.org, Roman Bolshakov , Alexander Graf , Paolo Bonzini Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 11/1/21 3:35 PM, Peter Maydell wrote: > On Mon, 1 Nov 2021 at 19:28, Richard Henderson > wrote: >> >> On 10/26/21 3:12 AM, Alexander Graf wrote: >>> Apple's Hypervisor.Framework forwards cache operations as MMIO traps >>> into user space. For MMIO however, these have no meaning: There is no >>> cache attached to them. >>> >>> So let's just treat cache data exits as nops. >>> >>> This fixes OpenBSD booting as guest. >>> >>> Signed-off-by: Alexander Graf >>> Reported-by: AJ Barris >>> Reference: https://github.com/utmapp/UTM/issues/3197 >>> --- >>> target/arm/hvf/hvf.c | 7 +++++++ >>> 1 file changed, 7 insertions(+) >> >> Thanks, applied to target-arm.next > > ...did you see my email saying I think we also need > to test S1PTW ? That arrived afterward. r~