diff mbox series

[v4,5/5] tpm: add a fake ACPI memory clear interface

Message ID 20180621115530.11069-6-marcandre.lureau@redhat.com
State New
Headers show
Series Add support for TPM Physical Presence interface | expand

Commit Message

Marc-André Lureau June 21, 2018, 11:55 a.m. UTC 
This allows to pass the last failing test from the Windows HLK TPM 2.0
TCG PPI 1.3 tests.

The interface is described in the "TCG Platform Reset Attack
Mitigation Specification", chapter 6 "ACPI _DSM Function". Whether or
not we should have a real implementation remains an open question to me.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 hw/i386/acpi-build.c | 9 +++++++++
 1 file changed, 9 insertions(+)
diff mbox series

Patch

diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 4cb3ac9000..fafc61c9dd 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -2072,6 +2072,15 @@  build_tpm_ppi(Aml *dev)
             aml_append(ifctx, aml_return(aml_buffer(1, zerobyte)));
         }
         aml_append(method, ifctx);
+
+       /* dummy MOR Memory Clear for the sake of WLK PPI test */
+        ifctx = aml_if(
+            aml_equal(aml_arg(0),
+                      aml_touuid("376054ED-CC13-4675-901C-4756D7F2D45D")));
+        {
+            aml_append(ifctx, aml_return(aml_int(0)));
+        }
+        aml_append(method, ifctx);
     }
     aml_append(dev, method);
 }