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Tsirkin" , Ani Sinha Subject: [PATCH 31/40] pcihp: isolate rule whether slot should be described in DSDT Date: Thu, 12 Jan 2023 15:03:03 +0100 Message-Id: <20230112140312.3096331-32-imammedo@redhat.com> In-Reply-To: <20230112140312.3096331-1-imammedo@redhat.com> References: <20230112140312.3096331-1-imammedo@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.2 Received-SPF: pass client-ip=170.10.133.124; envelope-from=imammedo@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, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Signed-off-by: Igor Mammedov --- hw/i386/acpi-build.c | 83 +++++++++++++++++++++++--------------------- 1 file changed, 43 insertions(+), 40 deletions(-) diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index 5b4f453395..56a4d0549c 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -385,6 +385,42 @@ static void build_append_pcihp_notify_entry(Aml *method, int slot) aml_append(method, if_ctx); } +static bool is_devfn_ignored(const int devfn, const PCIBus *bus, + bool bus_has_hotplug) +{ + const PCIDevice *pdev = bus->devices[devfn]; + + if (pdev) { + if (PCI_FUNC(devfn)) { + if (IS_PCI_BRIDGE(pdev)) { + /* + * Ignore only hotplugged PCI bridges on !0 functions, but + * allow describing cold plugged bridges on all functions + */ + if (DEVICE(pdev)->hotplugged) { + return true; + } + } else if (!get_dev_aml_func(DEVICE(pdev))) { + /* + * Ignore all other devices on !0 functions unless they + * have AML description (i.e have get_dev_aml_func() != 0) + */ + return true; + } + } + } else { /* non populated slots */ + /* + * hotplug is supported only for non-multifunction device + * so generate device description only for function 0 + */ + if (!bus_has_hotplug || PCI_FUNC(devfn) || + (pci_bus_is_express(bus) && PCI_SLOT(devfn) > 0)) { + return true; + } + } + return false; +} + void build_append_pci_bus_devices(Aml *parent_scope, PCIBus *bus) { Aml *dev, *notify_method = NULL, *method; @@ -400,59 +436,26 @@ void build_append_pci_bus_devices(Aml *parent_scope, PCIBus *bus) } for (devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) { - DeviceClass *dc; PCIDevice *pdev = bus->devices[devfn]; int slot = PCI_SLOT(devfn); int func = PCI_FUNC(devfn); /* ACPI spec: 1.0b: Table 6-2 _ADR Object Bus Types, PCI type */ int adr = slot << 16 | func; - bool hotpluggbale_slot = false; - bool cold_plugged_bridge = false; + bool hotpluggbale_slot = true; - if (pdev) { - dc = DEVICE_GET_CLASS(pdev); + if (is_devfn_ignored(devfn, bus, !!bsel)) { + continue; + } + if (pdev) { /* * Cold plugged bridges aren't themselves hot-pluggable. * Hotplugged bridges *are* hot-pluggable. */ - cold_plugged_bridge = IS_PCI_BRIDGE(pdev) && + bool cold_plugged_bridge = IS_PCI_BRIDGE(pdev) && !DEVICE(pdev)->hotplugged; - - hotpluggbale_slot = bsel && dc->hotpluggable && + hotpluggbale_slot = bsel && DEVICE_GET_CLASS(pdev)->hotpluggable && !cold_plugged_bridge; - - if (func) { - if (IS_PCI_BRIDGE(pdev)) { - /* - * Ignore only hotplugged PCI bridges on !0 functions, but - * allow describing cold plugged bridges on all functions - */ - if (DEVICE(pdev)->hotplugged) { - continue; - } - } else if (!get_dev_aml_func(DEVICE(pdev))) { - /* - * Ignore all other devices on !0 functions unless they - * have AML description (i.e have get_dev_aml_func() != 0) - */ - continue; - } - } - } else { - /* - * hotplug is supported only for non-multifunction device - * so generate device description only for function 0 - */ - if (bsel && !func) { - if (pci_bus_is_express(bus) && slot > 0) { - break; - } - /* mark it as empty hotpluggable slot */ - hotpluggbale_slot = true; - } else { - continue; - } } /* start to compose PCI device descriptor */