[Qemu-devel] [PATCH 7/9] pc: ACPI: expose PRST IO range via _CRS

[Igor Mammedov]

.. so OSPM could notice resource conflict if there is any.

Signed-off-by: Igor Mammedov <address@hidden>
---
 hw/i386/acpi-dsdt-cpu-hotplug.dsl | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/hw/i386/acpi-dsdt-cpu-hotplug.dsl 
b/hw/i386/acpi-dsdt-cpu-hotplug.dsl
index 1dfbb4f..869aa00 100644
--- a/hw/i386/acpi-dsdt-cpu-hotplug.dsl
+++ b/hw/i386/acpi-dsdt-cpu-hotplug.dsl
@@ -52,7 +52,8 @@ Scope(\_SB) {
         Sleep(200)
     }
 
-    OperationRegion(PRST, SystemIO, CPU_STATUS_BASE, 32)
+#define CPU_STATUS_LEN 32
+    OperationRegion(PRST, SystemIO, CPU_STATUS_BASE, CPU_STATUS_LEN)
     Field(PRST, ByteAcc, NoLock, Preserve) {
         PRS, 256
     }
@@ -89,4 +90,12 @@ Scope(\_SB) {
             Increment(Local0)
         }
     }
+
+    Device(PRES) {
+        Name(_HID, "ACPI0004")
+
+        Name(_CRS, ResourceTemplate() {
+            IO(Decode16, CPU_STATUS_BASE, CPU_STATUS_BASE, 0, CPU_STATUS_LEN)
+        })
+    }
 }
-- 
1.8.4.2