[PATCH 2/4] acpi: set fadt.smi_cmd to zero when SMM is not supported

[isaku . yamahata]

From: Isaku Yamahata <isaku.yamahata@intel.com>

>From table 5.9 SMI_CMD of ACPI spec
> This field is reserved and must be zero on system
> that does not support System Management mode.

So when smm is not enabled, set it to zero to comform to the spec.

Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com>
---
 hw/i386/acpi-build.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index f56d699c7f..005bcc2886 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -139,6 +139,8 @@ const struct AcpiGenericAddress x86_nvdimm_acpi_dsmio = {
 static void init_common_fadt_data(MachineState *ms, Object *o,
                                   AcpiFadtData *data)
 {
+    X86MachineState *x86ms = X86_MACHINE(ms);
+    bool smm_enabled = x86_machine_is_smm_enabled(x86ms);
     uint32_t io = object_property_get_uint(o, ACPI_PM_PROP_PM_IO_BASE, NULL);
     AmlAddressSpace as = AML_AS_SYSTEM_IO;
     AcpiFadtData fadt = {
@@ -159,12 +161,12 @@ static void init_common_fadt_data(MachineState *ms, 
Object *o,
         .rtc_century = RTC_CENTURY,
         .plvl2_lat = 0xfff /* C2 state not supported */,
         .plvl3_lat = 0xfff /* C3 state not supported */,
-        .smi_cmd = ACPI_PORT_SMI_CMD,
+        .smi_cmd = smm_enabled ? ACPI_PORT_SMI_CMD : 0,
         .sci_int = object_property_get_uint(o, ACPI_PM_PROP_SCI_INT, NULL),
         .acpi_enable_cmd =
-            object_property_get_uint(o, ACPI_PM_PROP_ACPI_ENABLE_CMD, NULL),
+            smm_enabled ? object_property_get_uint(o, 
ACPI_PM_PROP_ACPI_ENABLE_CMD, NULL) : 0,
         .acpi_disable_cmd =
-            object_property_get_uint(o, ACPI_PM_PROP_ACPI_DISABLE_CMD, NULL),
+            smm_enabled ? object_property_get_uint(o, 
ACPI_PM_PROP_ACPI_DISABLE_CMD, NULL) : 0,
         .pm1a_evt = { .space_id = as, .bit_width = 4 * 8, .address = io },
         .pm1a_cnt = { .space_id = as, .bit_width = 2 * 8,
                       .address = io + 0x04 },
-- 
2.17.1