[Qemu-devel] [RFC PATCH v2 05/12] acpi: build static _PRT

[Chao Peng <chao.p.peng@linux.intel.com>]

...to reduce the interpretation burden for guest ACPI component.

Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com>
---
 hw/i386/acpi-build.c | 31 ++++++++++++++++++++++++++++++-
 hw/i386/pc.c         |  1 +
 include/hw/i386/pc.h |  2 ++
 3 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index a26a4bb..60c0896 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -1772,6 +1772,31 @@ static void build_q35_pci0_int(Aml *table)
     aml_append(table, sb_scope);
 }
 
+static void build_static_q35_pci0_int(Aml *table)
+{
+    int i, j;
+    Aml *method, *res, *pkg;
+    Aml *sb_scope = aml_scope("_SB");
+    Aml *pci0_scope = aml_scope("PCI0");
+
+    method = aml_method("_PRT", 0, AML_NOTSERIALIZED);
+    res = aml_package(128);
+    for (i = 0; i < 32; i++) {
+        for (j = 0; j < 4; j++) {
+            pkg = aml_package(4);
+            aml_append(pkg, aml_int((i << 16) | 0xffff));
+            aml_append(pkg, aml_int(j));
+            aml_append(pkg, aml_int(0));
+            aml_append(pkg, aml_int(0x10 + j));
+            aml_append(res, pkg);
+        }
+    }
+
+    aml_append(method, aml_return(res));
+    aml_append(pci0_scope, method);
+    aml_append(sb_scope, pci0_scope);
+}
+
 static void build_q35_isa_bridge(Aml *table)
 {
     Aml *dev;
@@ -2007,7 +2032,11 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
         build_hpet_aml(dsdt);
         build_q35_isa_bridge(dsdt);
         build_isa_devices_aml(dsdt);
-        build_q35_pci0_int(dsdt);
+        if (pcms->static_prt) {
+            build_static_q35_pci0_int(dsdt);
+        } else {
+            build_q35_pci0_int(dsdt);
+        }
     }
 
     if (pcmc->legacy_cpu_hotplug) {
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 1d62957..f479697 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -2196,6 +2196,7 @@ static void pc_machine_initfn(Object *obj)
     PC_MACHINE_DEFINE_PROP_BOOL(pcms, PC_MACHINE_SATA, sata, true);
     PC_MACHINE_DEFINE_PROP_BOOL(pcms, PC_MACHINE_PIC, pic, true);
     PC_MACHINE_DEFINE_PROP_BOOL(pcms, PC_MACHINE_PIT, pit, true);
+    PC_MACHINE_DEFINE_PROP_BOOL(pcms, PC_MACHINE_STATIC_PRT, static_prt, false);
 }
 
 static void pc_machine_reset(void)
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 1dc7954..55ab09a 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -81,6 +81,7 @@ struct PCMachineState {
     bool sata;
     bool pic;
     bool pit;
+    bool static_prt;
 };
 
 #define PC_MACHINE_ACPI_DEVICE_PROP "acpi-device"
@@ -93,6 +94,7 @@ struct PCMachineState {
 #define PC_MACHINE_SATA             "sata"
 #define PC_MACHINE_PIC              "pic"
 #define PC_MACHINE_PIT              "pit"
+#define PC_MACHINE_STATIC_PRT       "static-prt"
 
 /**
  * PCMachineClass:
-- 
1.8.3.1