qemu: bios: provide gpe _L0x methods (Glauber Costa)

provide methods for gpe blk 0, even though they do nothing atm
    
Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

Index: bochs/bios/acpi-dsdt.dsl
===================================================================
--- bochs.orig/bios/acpi-dsdt.dsl
+++ bochs/bios/acpi-dsdt.dsl
@@ -597,4 +597,59 @@ DefinitionBlock (
         Zero,  /* reserved */
         Zero   /* reserved */
     })
+
+    Scope (\_GPE)
+    {
+        Name(_HID, "ACPI0006")
+
+        Method(_L00) {
+            Return(0x01)
+        }
+        Method(_L01) {
+            Return(0x01)
+        }
+        Method(_L02) {
+            Return(0x01)
+        }
+        Method(_L03) {
+            Return(0x01)
+        }
+        Method(_L04) {
+            Return(0x01)
+        }
+        Method(_L05) {
+            Return(0x01)
+        }
+        Method(_L06) {
+            Return(0x01)
+        }
+        Method(_L07) {
+            Return(0x01)
+        }
+        Method(_L08) {
+            Return(0x01)
+        }
+        Method(_L09) {
+            Return(0x01)
+        }
+        Method(_L0A) {
+            Return(0x01)
+        }
+        Method(_L0B) {
+            Return(0x01)
+        }
+        Method(_L0C) {
+            Return(0x01)
+        }
+        Method(_L0D) {
+            Return(0x01)
+        }
+        Method(_L0E) {
+            Return(0x01)
+        }
+        Method(_L0F) {
+            Return(0x01)
+        }
+    }
+
 }
Index: bochs/bios/rombios32.c
===================================================================
--- bochs.orig/bios/rombios32.c
+++ bochs/bios/rombios32.c
@@ -1647,6 +1647,8 @@ void acpi_bios_init(void)
     fadt->pm_tmr_len = 4;
     fadt->plvl2_lat = cpu_to_le16(0xfff); // C2 state not supported
     fadt->plvl3_lat = cpu_to_le16(0xfff); // C3 state not supported
+    fadt->gpe0_blk = cpu_to_le32(0xafe0);
+    fadt->gpe0_blk_len = 4;
     /* WBINVD + PROC_C1 + PWR_BUTTON + SLP_BUTTON + FIX_RTC */
     fadt->flags = cpu_to_le32((1 << 0) | (1 << 2) | (1 << 4) | (1 << 5) | (1 << 6));
     acpi_build_table_header((struct acpi_table_header *)fadt, "FACP",

--