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([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.gmail.com with ESMTPSA id pk19sm2403616ejb.32.2020.11.27.03.21.53 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 27 Nov 2020 03:21:53 -0800 (PST) Subject: Re: [PATCH 4/8] arm: Synchronize CPU on PSCI on To: Alexander Graf , Peter Maydell References: <20201126213600.40654-1-agraf@csgraf.de> <20201126213600.40654-5-agraf@csgraf.de> <785c216b-d4b5-b65f-1ddf-4c6374b72ece@csgraf.de> <284d0cd2-268b-b937-3a6e-d074ce28baee@csgraf.de> <3594db71-c72f-2946-ffa5-47da737900c6@redhat.com> From: Paolo Bonzini Message-ID: <6260c875-bda1-35f3-20fa-a1c05396250d@redhat.com> Date: Fri, 27 Nov 2020 12:21:52 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.4.0 MIME-Version: 1.0 In-Reply-To: Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=pbonzini@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=63.128.21.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Eduardo Habkost , Richard Henderson , QEMU Developers , Cameron Esfahani , Roman Bolshakov , qemu-arm Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 27/11/20 11:58, Alexander Graf wrote: > Mostly because there is a lot of super fragile logic all over resets > atm. Init setts dirty, post-init clears it. Then the arch reset handlers > assume that state is not dirty and fiddle with KVM reset ioctls and KVM > register modification ioctls directly. Mostly because KVM for the most > part implements its own reset logic. > > I'm fairy sure I'd break someone unintentionally if I just throw this > into the common reset handler. > > However, if we're happy to fix the fallout when it arises, I'm happy to > do so. I'll decline the offer. ;) Paolo