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[91.219.240.2]) by smtp.gmail.com with ESMTPSA id h10sm1461833wro.57.2020.07.21.01.58.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 21 Jul 2020 01:58:12 -0700 (PDT) From: Vitaly Kuznetsov To: Eduardo Habkost Subject: Re: [PATCH] i386/kvm: correct the meaning of '0xffffffff' value for hv-spinlocks In-Reply-To: <20200720194039.GX1274972@habkost.net> References: <20200515114847.74523-1-vkuznets@redhat.com> <20200720194039.GX1274972@habkost.net> Date: Tue, 21 Jul 2020 10:58:11 +0200 Message-ID: <87r1t5p7mk.fsf@vitty.brq.redhat.com> MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain Received-SPF: pass client-ip=207.211.31.120; envelope-from=vkuznets@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/21 01:46:39 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, 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: Paolo Bonzini , Marcelo Tosatti , qemu-devel@nongnu.org, Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Eduardo Habkost writes: > On Fri, May 15, 2020 at 01:48:47PM +0200, Vitaly Kuznetsov wrote: >> Hyper-V TLFS prior to version 6.0 had a mistake in it: special value >> '0xffffffff' for CPUID 0x40000004.EBX was called 'never to retry', this >> looked weird (like why it's not '0' which supposedly have the same effect?) >> but nobody raised the question. In TLFS version 6.0 the mistake was >> corrected to 'never notify' which sounds logical. Fix QEMU accordingly. >> >> Signed-off-by: Vitaly Kuznetsov > > I've just found this buried in my inbox, sorry for missing it! Better late than never! (And, to be honest, I completely forgot about it as well :-) > > Queued for 5.2. > Thanks! -- Vitaly