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x68: acpi: trigger SMI before sending hotplug Notify event to OSPM Date: Tue, 8 Sep 2020 10:24:44 -0400 Message-Id: <20200908142444.546924-1-imammedo@redhat.com> In-Reply-To: <20200907112348.530921-10-imammedo@redhat.com> References: <20200907112348.530921-10-imammedo@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=imammedo@redhat.com X-Mimecast-Spam-Score: 0.001 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=207.211.31.81; envelope-from=imammedo@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/08 03:00:34 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] 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, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-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: lersek@redhat.com, mst@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Add comment explaining why while_ctx2 restarts from the last processed CPU. Signed-off-by: Igor Mammedov Reviewed-by: Laszlo Ersek Tested-by: Laszlo Ersek --- hw/acpi/cpu.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/hw/acpi/cpu.c b/hw/acpi/cpu.c index 1283972001..8dd4d8ebbf 100644 --- a/hw/acpi/cpu.c +++ b/hw/acpi/cpu.c @@ -601,6 +601,15 @@ void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts, aml_append(while_ctx, aml_increment(cpu_idx)); } aml_append(while_ctx2, while_ctx); + /* + * If another batch is needed, then it will resume scanning + * exactly at -- and not after -- the last CPU that's currently + * in CPU_ADDED_LIST. In other words, the last CPU in + * CPU_ADDED_LIST is going to be re-checked. That's OK: we've + * just cleared the insert event for *all* CPUs in + * CPU_ADDED_LIST, including the last one. So the scan will + * simply seek past it. + */ } aml_append(method, while_ctx2); aml_append(method, aml_release(ctrl_lock));