From: Isaku Yamahata <isaku.yamahata@xxxxxxxxx>
Disable S3/S4 unconditionally when TDX is enabled. Because cpu state is
protected, it's not allowed to reset cpu state. So S3/S4 can't be
supported.
Signed-off-by: Isaku Yamahata <isaku.yamahata@xxxxxxxxx>
---
target/i386/kvm/tdx.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/target/i386/kvm/tdx.c b/target/i386/kvm/tdx.c
index 0621317b0a..0dd6d94c2a 100644
--- a/target/i386/kvm/tdx.c
+++ b/target/i386/kvm/tdx.c
@@ -31,6 +31,9 @@
#include "sysemu/tdx.h"
#include "tdx.h"
+#include "hw/southbridge/piix.h"
+#include "hw/i386/ich9.h"
+
#define TDX1_TD_ATTRIBUTE_DEBUG BIT_ULL(0)
#define TDX1_TD_ATTRIBUTE_PERFMON BIT_ULL(63)
#define TDX1_MIN_TSC_FREQUENCY_KHZ (100 * 1000)
@@ -103,10 +106,27 @@ static TdxFirmwareEntry *tdx_get_hob_entry(TdxGuest *tdx)
static void tdx_finalize_vm(Notifier *notifier, void *unused)
{
+ Object *pm;
+ bool ambig;
MachineState *ms = MACHINE(qdev_get_machine());
TdxGuest *tdx = TDX_GUEST(ms->cgs);
TdxFirmwareEntry *entry;
+ /*
+ * object look up logic is copied from acpi_get_pm_info()
+ * @ hw/ie86/acpi-build.c
+ * This property override needs to be done after machine initialization
+ * as there is no ordering of creation of objects/properties.
+ */
+ pm = object_resolve_path_type("", TYPE_PIIX4_PM, &ambig);
+ if (ambig || !pm) {
+ pm = object_resolve_path_type("", TYPE_ICH9_LPC_DEVICE, &ambig);
+ }
+ if (!ambig && pm) {
+ object_property_set_uint(pm, ACPI_PM_PROP_S3_DISABLED, 1, NULL);
+ object_property_set_uint(pm, ACPI_PM_PROP_S4_DISABLED, 1, NULL);
+ }
+
tdvf_hob_create(tdx, tdx_get_hob_entry(tdx));
for_each_fw_entry(&tdx->fw, entry) {
--
2.25.1
