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[Qemu-devel] [PATCH V4 3/6] hw/acpi: fix a DSDT table issue when a pxb i

From: Marcel Apfelbaum
Subject: [Qemu-devel] [PATCH V4 3/6] hw/acpi: fix a DSDT table issue when a pxb is present.
Date: Thu, 30 Jun 2016 22:07:17 +0300

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 <address@hidden>
Signed-off-by: Marcel Apfelbaum <address@hidden>
 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 5a594be..675a3dc 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -596,6 +596,10 @@ 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));

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