[Qemu-devel] [PATCH v5 04/16] pc: acpi: drop manual hole punching for GPE0 resources

[Igor Mammedov]

Drops manual hole punching in PCI0._CRS on PIIX4 machine type
for GPE0 resources. Resources will be consumed by Device(GPE0)
that is attached to PCI namespace.
There is GPE device with HID ACPI0006 since ACPI2.0
that should be used for this purpose but none of Windows
versions support it and show it as "unknown device",
so reserve resource in old fashioned way with PNP0A06
device to make windows happy and actually reserve resources.

Along with last hole _CRS layout of PIIX4 machine becomes
the same as Q35 one, so merge them together and use the same
_CRS for both machine types.

Signed-off-by: Igor Mammedov <address@hidden>
---
 hw/i386/acpi-build.c | 32 +++++++++++++++++---------------
 1 file changed, 17 insertions(+), 15 deletions(-)

diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 0de261a..2700154 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -876,21 +876,10 @@ build_ssdt(GArray *table_data, GArray *linker,
         aml_word_io(aml_min_fixed, aml_max_fixed,
                     aml_pos_decode, aml_entire_range,
                     0x0000, 0x0000, 0x0CF7, 0x0000, 0x0CF8));
-    if (ich9_lpc_find()) { /* Q35 */
-        aml_append(crs,
-            aml_word_io(aml_min_fixed, aml_max_fixed,
-                        aml_pos_decode, aml_entire_range,
-                        0x0000, 0x0D00, 0xFFFF, 0x0000, 0xF300));
-    } else { /* piix4 */
-        aml_append(crs,
-            aml_word_io(aml_min_fixed, aml_max_fixed,
-                        aml_pos_decode, aml_entire_range,
-                        0x0000, 0x0D00, 0xAFDF, 0x0000, 0xA2E0));
-        aml_append(crs,
-            aml_word_io(aml_min_fixed, aml_max_fixed,
-                        aml_pos_decode, aml_entire_range,
-                        0x0000, 0xAFE4, 0xFFFF, 0x0000, 0x501C));
-    }
+    aml_append(crs,
+        aml_word_io(aml_min_fixed, aml_max_fixed,
+                    aml_pos_decode, aml_entire_range,
+                    0x0000, 0x0D00, 0xFFFF, 0x0000, 0xF300));
     aml_append(crs,
         aml_dword_memory(aml_pos_decode, aml_min_fixed, aml_max_fixed,
                          aml_cacheable, aml_ReadWrite,
@@ -909,6 +898,19 @@ build_ssdt(GArray *table_data, GArray *linker,
     }
     aml_append(scope, aml_name_decl("_CRS", crs));
 
+    /* reserve GPE0 block resources */
+    dev = aml_device("GPE0");
+    aml_append(dev, aml_name_decl("_HID", aml_string("PNP0A06")));
+    aml_append(dev, aml_name_decl("_UID", aml_string("GPE0 resources")));
+    /* device present, functioning, decoding, not shown in UI */
+    aml_append(dev, aml_name_decl("_STA", aml_int(0xB)));
+    crs = aml_resource_template();
+    aml_append(crs,
+        aml_io(aml_decode16, pm->gpe0_blk, pm->gpe0_blk, 1, pm->gpe0_blk_len)
+    );
+    aml_append(dev, aml_name_decl("_CRS", crs));
+    aml_append(scope, dev);
+
     /* reserve PCIHP resources */
     if (pm->pcihp_io_len) {
         dev = aml_device("PHPR");
-- 
1.8.3.1