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-rw-r--r--hw/acpi/aml-build.c8
-rw-r--r--hw/i386/acpi-build.c8
-rw-r--r--include/hw/acpi/acpi-defs.h1
-rw-r--r--include/hw/input/i8042.h15
4 files changed, 31 insertions, 1 deletions
diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index 8966e16320..1773cf55f1 100644
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -2152,7 +2152,13 @@ void build_fadt(GArray *tbl, BIOSLinker *linker, const AcpiFadtData *f,
     build_append_int_noprefix(tbl, 0, 1); /* DAY_ALRM */
     build_append_int_noprefix(tbl, 0, 1); /* MON_ALRM */
     build_append_int_noprefix(tbl, f->rtc_century, 1); /* CENTURY */
-    build_append_int_noprefix(tbl, 0, 2); /* IAPC_BOOT_ARCH */
+    /* IAPC_BOOT_ARCH */
+    if (f->rev == 1) {
+        build_append_int_noprefix(tbl, 0, 2);
+    } else {
+        /* since ACPI v2.0 */
+        build_append_int_noprefix(tbl, f->iapc_boot_arch, 2);
+    }
     build_append_int_noprefix(tbl, 0, 1); /* Reserved */
     build_append_int_noprefix(tbl, f->flags, 4); /* Flags */
 
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index ebd47aa26f..4ad4d7286c 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -38,6 +38,7 @@
 #include "hw/nvram/fw_cfg.h"
 #include "hw/acpi/bios-linker-loader.h"
 #include "hw/isa/isa.h"
+#include "hw/input/i8042.h"
 #include "hw/block/fdc.h"
 #include "hw/acpi/memory_hotplug.h"
 #include "sysemu/tpm.h"
@@ -192,6 +193,13 @@ static void init_common_fadt_data(MachineState *ms, Object *o,
             .address = object_property_get_uint(o, ACPI_PM_PROP_GPE0_BLK, NULL)
         },
     };
+
+    /*
+     * ACPI v2, Table 5-10 - Fixed ACPI Description Table Boot Architecture
+     * Flags, bit offset 1 - 8042.
+     */
+    fadt.iapc_boot_arch = iapc_boot_arch_8042();
+
     *data = fadt;
 }
 
diff --git a/include/hw/acpi/acpi-defs.h b/include/hw/acpi/acpi-defs.h
index c97e8633ad..2b42e4192b 100644
--- a/include/hw/acpi/acpi-defs.h
+++ b/include/hw/acpi/acpi-defs.h
@@ -77,6 +77,7 @@ typedef struct AcpiFadtData {
     uint16_t plvl2_lat;        /* P_LVL2_LAT */
     uint16_t plvl3_lat;        /* P_LVL3_LAT */
     uint16_t arm_boot_arch;    /* ARM_BOOT_ARCH */
+    uint16_t iapc_boot_arch;   /* IAPC_BOOT_ARCH */
     uint8_t minor_ver;         /* FADT Minor Version */
 
     /*
diff --git a/include/hw/input/i8042.h b/include/hw/input/i8042.h
index 1d90432dae..e070f546e4 100644
--- a/include/hw/input/i8042.h
+++ b/include/hw/input/i8042.h
@@ -23,4 +23,19 @@ void i8042_mm_init(qemu_irq kbd_irq, qemu_irq mouse_irq,
 void i8042_isa_mouse_fake_event(ISAKBDState *isa);
 void i8042_setup_a20_line(ISADevice *dev, qemu_irq a20_out);
 
+static inline bool i8042_present(void)
+{
+    bool amb = false;
+    return object_resolve_path_type("", TYPE_I8042, &amb) || amb;
+}
+
+/*
+ * ACPI v2, Table 5-10 - Fixed ACPI Description Table Boot Architecture
+ * Flags, bit offset 1 - 8042.
+ */
+static inline uint16_t iapc_boot_arch_8042(void)
+{
+    return i8042_present() ? 0x1 << 1 : 0x0 ;
+}
+
 #endif /* HW_INPUT_I8042_H */