[PATCH] hw/i386/acpi-build: adjust q35 IO addr range for acpi pci hotplug

[Ani Sinha]

Change caf108bc58790 ("hw/i386/acpi-build: Add ACPI PCI hot-plug methods to 
Q35")
selects an IO address range for acpi based PCI hotplug for q35 arbitrarily. It
starts at address 0x0cc4 and ends at 0x0cdb. It was assumed that this address
range was free and available. However, upon more testing, it seems this address
range to be not available for some latest versions of windows. Hence, this
change modifies the IO address range so that windows can allocate the address
range without any conflict. The new address range would start at 0x0dd4 and end
at address 0x0deb.

This change has been tested using a Windows Server 2019 guest VM.

Fixes: caf108bc58790 ("hw/i386/acpi-build: Add ACPI PCI hot-plug methods to 
Q35")
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/561

Signed-off-by: Ani Sinha <ani@anisinha.ca>
---
 include/hw/acpi/ich9.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/hw/acpi/ich9.h b/include/hw/acpi/ich9.h
index a329ce43ab..b68c5a2174 100644
--- a/include/hw/acpi/ich9.h
+++ b/include/hw/acpi/ich9.h
@@ -29,7 +29,7 @@
 #include "hw/acpi/acpi_dev_interface.h"
 #include "hw/acpi/tco.h"
 
-#define ACPI_PCIHP_ADDR_ICH9 0x0cc4
+#define ACPI_PCIHP_ADDR_ICH9 0x0dd4
 
 typedef struct ICH9LPCPMRegs {
     /*
-- 
2.25.1