[Qemu-devel] [PULL 21/36] hw/acpi: fix a DSDT table issue when a pxb is present.

From: "Michael S. Tsirkin" <mst@redhat.com>
To: qemu-devel@nongnu.org
Cc: Peter Maydell <peter.maydell@linaro.org>,
	Marcel Apfelbaum <marcel@redhat.com>,
	Igor Mammedov <imammedo@redhat.com>,
	Laszlo Ersek <lersek@redhat.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Richard Henderson <rth@twiddle.net>,
	Eduardo Habkost <ehabkost@redhat.com>
Subject: [Qemu-devel] [PULL 21/36] hw/acpi: fix a DSDT table issue when a pxb is present.
Date: Mon, 4 Jul 2016 19:47:25 +0300	[thread overview]
Message-ID: <20160704194725-mutt-send-email-mst@redhat.com> (raw)
In-Reply-To: <1467650742-17580-1-git-send-email-mst@redhat.com>

From: Marcel Apfelbaum <marcel@redhat.com>

PXBs do not support hotplug so they don't have a PCNT function.
Since the PXB's PCI root-bus is a child bus of bus 0, the
build_dsdt code will add a call to the corresponding PCNT function.

Fix this by skipping the PCNT call for the above case.
While at it skip also PCIe child buses.

Reported-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/i386/acpi-build.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index fbba461..5ed2bbd 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -597,6 +597,10 @@ static void build_append_pci_bus_devices(Aml *parent_scope, PCIBus *bus,
         QLIST_FOREACH(sec, &bus->child, sibling) {
             int32_t devfn = sec->parent_dev->devfn;
 
+            if (pci_bus_is_root(sec) || pci_bus_is_express(sec)) {
+                continue;
+            }
+
             aml_append(method, aml_name("^S%.02X.PCNT", devfn));
         }
     }
-- 
MST
