TPM2 ACPI table support

Add a TPM2 ACPI table if a TPM 2 is used in the backend.
Also add an SSDT for the TPM 2.

Rename tpm_find() to tpm_get_version() and have this function
return the version of the TPM found, TPMVersion_Unspec if
no TPM is found. Use the version number to build version
specific ACPI tables.

Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

hw/i386/Makefile.objs

@@ -9,7 +9,7 @@ obj-y += kvmvapic.o
 obj-y += acpi-build.o
 hw/i386/acpi-build.o: hw/i386/acpi-build.c \
 	hw/i386/acpi-dsdt.hex hw/i386/q35-acpi-dsdt.hex \
-	hw/i386/ssdt-tpm.hex
+	hw/i386/ssdt-tpm.hex hw/i386/ssdt-tpm2.hex
 
 iasl-option=$(shell if test -z "`$(1) $(2) 2>&1 > /dev/null`" \
     ; then echo "$(2)"; else echo "$(3)"; fi ;)

hw/i386/acpi-build.c

@@ -41,6 +41,7 @@
 #include "hw/acpi/memory_hotplug.h"
 #include "sysemu/tpm.h"
 #include "hw/acpi/tpm.h"
+#include "sysemu/tpm_backend.h"
 
 /* Supported chipsets: */
 #include "hw/acpi/piix4.h"
@@ -106,7 +107,7 @@ typedef struct AcpiPmInfo {
 
 typedef struct AcpiMiscInfo {
     bool has_hpet;
-    bool has_tpm;
+    TPMVersion tpm_version;
     const unsigned char *dsdt_code;
     unsigned dsdt_size;
     uint16_t pvpanic_port;
@@ -234,7 +235,7 @@ static void acpi_get_pm_info(AcpiPmInfo *pm)
 static void acpi_get_misc_info(AcpiMiscInfo *info)
 {
     info->has_hpet = hpet_find();
-    info->has_tpm = tpm_find();
+    info->tpm_version = tpm_get_version();
     info->pvpanic_port = pvpanic_port();
     info->applesmc_io_base = applesmc_port();
 }
@@ -414,6 +415,7 @@ build_madt(GArray *table_data, GArray *linker, AcpiCpuInfo *cpu,
 }
 
 #include "hw/i386/ssdt-tpm.hex"
+#include "hw/i386/ssdt-tpm2.hex"
 
 /* Assign BSEL property to all buses.  In the future, this can be changed
  * to only assign to buses that support hotplug.
@@ -1029,6 +1031,25 @@ build_tpm_ssdt(GArray *table_data, GArray *linker)
     memcpy(tpm_ptr, ssdt_tpm_aml, sizeof(ssdt_tpm_aml));
 }
 
+static void
+build_tpm2(GArray *table_data, GArray *linker)
+{
+    Acpi20TPM2 *tpm2_ptr;
+    void *tpm_ptr;
+
+    tpm_ptr = acpi_data_push(table_data, sizeof(ssdt_tpm2_aml));
+    memcpy(tpm_ptr, ssdt_tpm2_aml, sizeof(ssdt_tpm2_aml));
+
+    tpm2_ptr = acpi_data_push(table_data, sizeof *tpm2_ptr);
+
+    tpm2_ptr->platform_class = cpu_to_le16(TPM2_ACPI_CLASS_CLIENT);
+    tpm2_ptr->control_area_address = cpu_to_le64(0);
+    tpm2_ptr->start_method = cpu_to_le32(TPM2_START_METHOD_MMIO);
+
+    build_header(linker, table_data,
+                 (void *)tpm2_ptr, "TPM2", sizeof(*tpm2_ptr), 4);
+}
+
 typedef enum {
     MEM_AFFINITY_NOFLAGS      = 0,
     MEM_AFFINITY_ENABLED      = (1 << 0),
@@ -1343,12 +1364,21 @@ void acpi_build(PcGuestInfo *guest_info, AcpiBuildTables *tables)
         acpi_add_table(table_offsets, tables_blob);
         build_hpet(tables_blob, tables->linker);
     }
-    if (misc.has_tpm) {
+    if (misc.tpm_version != TPM_VERSION_UNSPEC) {
         acpi_add_table(table_offsets, tables_blob);
         build_tpm_tcpa(tables_blob, tables->linker, tables->tcpalog);
 
         acpi_add_table(table_offsets, tables_blob);
-        build_tpm_ssdt(tables_blob, tables->linker);
+        switch (misc.tpm_version) {
+        case TPM_VERSION_1_2:
+            build_tpm_ssdt(tables_blob, tables->linker);
+            break;
+        case TPM_VERSION_2_0:
+            build_tpm2(tables_blob, tables->linker);
+            break;
+        default:
+            assert(false);
+        }
     }
     if (guest_info->numa_nodes) {
         acpi_add_table(table_offsets, tables_blob);

hw/i386/ssdt-tpm.dsl

@@ -25,19 +25,5 @@ DefinitionBlock (
     0x1                 // OEM Revision
     )
 {
-    Scope(\_SB) {
+#include "ssdt-tpm-common.dsl"
-        /* TPM with emulated TPM TIS interface */
-        Device (TPM) {
-            Name (_HID, EisaID ("PNP0C31"))
-            Name (_CRS, ResourceTemplate ()
-            {
-                Memory32Fixed (ReadWrite, TPM_TIS_ADDR_BASE, TPM_TIS_ADDR_SIZE)
-                // older Linux tpm_tis drivers do not work with IRQ
-                //IRQNoFlags () {TPM_TIS_IRQ}
-            })
-            Method (_STA, 0, NotSerialized) {
-                Return (0x0F)
-            }
-        }
-    }
 }

hw/i386/ssdt-tpm.hex.generated

@@ -3,12 +3,12 @@ static unsigned char ssdt_tpm_aml[] = {
 0x53,
 0x44,
 0x54,
-0x5d,
+0x6b,
 0x0,
 0x0,
 0x0,
 0x1,
-0x1c,
+0x37,
 0x42,
 0x58,
 0x50,
@@ -36,15 +36,26 @@ static unsigned char ssdt_tpm_aml[] = {
 0x14,
 0x20,
 0x10,
-0x38,
+0x46,
+0x4,
 0x5c,
+0x2f,
+0x3,
 0x5f,
 0x53,
 0x42,
 0x5f,
+0x50,
+0x43,
+0x49,
+0x30,
+0x49,
+0x53,
+0x41,
+0x5f,
 0x5b,
 0x82,
-0x30,
+0x33,
 0x54,
 0x50,
 0x4d,
@@ -65,9 +76,9 @@ static unsigned char ssdt_tpm_aml[] = {
 0x52,
 0x53,
 0x11,
-0x11,
+0x14,
 0xa,
-0xe,
+0x11,
 0x86,
 0x9,
 0x0,
@@ -80,6 +91,9 @@ static unsigned char ssdt_tpm_aml[] = {
 0x50,
 0x0,
 0x0,
+0x22,
+0x20,
+0x0,
 0x79,
 0x0,
 0x14,

hw/i386/ssdt-tpm2.dsl

@@ -0,0 +1,29 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+#include "hw/acpi/tpm.h"
+
+ACPI_EXTRACT_ALL_CODE ssdt_tpm2_aml
+
+DefinitionBlock (
+    "ssdt-tpm2.aml",    // Output Filename
+    "SSDT",             // Signature
+    0x01,               // SSDT Compliance Revision
+    "BXPC",             // OEMID
+    "BXSSDT",           // TABLE ID
+    0x1                 // OEM Revision
+    )
+{
+#include "ssdt-tpm-common.dsl"
+}

hw/i386/ssdt-tpm2.hex.generated

@@ -0,0 +1,109 @@
+static unsigned char ssdt_tpm2_aml[] = {
+0x53,
+0x53,
+0x44,
+0x54,
+0x6b,
+0x0,
+0x0,
+0x0,
+0x1,
+0x37,
+0x42,
+0x58,
+0x50,
+0x43,
+0x0,
+0x0,
+0x42,
+0x58,
+0x53,
+0x53,
+0x44,
+0x54,
+0x0,
+0x0,
+0x1,
+0x0,
+0x0,
+0x0,
+0x49,
+0x4e,
+0x54,
+0x4c,
+0x7,
+0x11,
+0x14,
+0x20,
+0x10,
+0x46,
+0x4,
+0x5c,
+0x2f,
+0x3,
+0x5f,
+0x53,
+0x42,
+0x5f,
+0x50,
+0x43,
+0x49,
+0x30,
+0x49,
+0x53,
+0x41,
+0x5f,
+0x5b,
+0x82,
+0x33,
+0x54,
+0x50,
+0x4d,
+0x5f,
+0x8,
+0x5f,
+0x48,
+0x49,
+0x44,
+0xc,
+0x41,
+0xd0,
+0xc,
+0x31,
+0x8,
+0x5f,
+0x43,
+0x52,
+0x53,
+0x11,
+0x14,
+0xa,
+0x11,
+0x86,
+0x9,
+0x0,
+0x1,
+0x0,
+0x0,
+0xd4,
+0xfe,
+0x0,
+0x50,
+0x0,
+0x0,
+0x22,
+0x20,
+0x0,
+0x79,
+0x0,
+0x14,
+0x9,
+0x5f,
+0x53,
+0x54,
+0x41,
+0x0,
+0xa4,
+0xa,
+0xf
+};

hw/tpm/tpm_tis.c

@@ -32,6 +32,7 @@
 #include "tpm_tis.h"
 #include "qemu-common.h"
 #include "qemu/main-loop.h"
+#include "sysemu/tpm_backend.h"
 
 #define DEBUG_TIS 0
 
@@ -961,6 +962,16 @@ static int tpm_tis_do_startup_tpm(TPMState *s)
     return tpm_backend_startup_tpm(s->be_driver);
 }
 
+/*
+ * Get the TPMVersion of the backend device being used
+ */
+TPMVersion tpm_tis_get_tpm_version(Object *obj)
+{
+    TPMState *s = TPM(obj);
+
+    return tpm_backend_get_tpm_version(s->be_driver);
+}
+
 /*
  * This function is called when the machine starts, resets or due to
  * S3 resume.

include/hw/acpi/acpi-defs.h

@@ -450,6 +450,9 @@ typedef struct AcpiTableMcfg AcpiTableMcfg;
 
 /*
  * TCPA Description Table
+ *
+ * Following Level 00, Rev 00.37 of specs:
+ * http://www.trustedcomputinggroup.org/resources/tcg_acpi_specification
  */
 struct Acpi20Tcpa {
     ACPI_TABLE_HEADER_DEF                    /* ACPI common table header */
@@ -459,6 +462,21 @@ struct Acpi20Tcpa {
 } QEMU_PACKED;
 typedef struct Acpi20Tcpa Acpi20Tcpa;
 
+/*
+ * TPM2
+ *
+ * Following Level 00, Rev 00.37 of specs:
+ * http://www.trustedcomputinggroup.org/resources/tcg_acpi_specification
+ */
+struct Acpi20TPM2 {
+    ACPI_TABLE_HEADER_DEF
+    uint16_t platform_class;
+    uint16_t reserved;
+    uint64_t control_area_address;
+    uint32_t start_method;
+} QEMU_PACKED;
+typedef struct Acpi20TPM2 Acpi20TPM2;
+
 /* DMAR - DMA Remapping table r2.2 */
 struct AcpiTableDmar {
     ACPI_TABLE_HEADER_DEF

include/hw/acpi/tpm.h

@@ -26,4 +26,9 @@
 #define TPM_TCPA_ACPI_CLASS_CLIENT  0
 #define TPM_TCPA_ACPI_CLASS_SERVER  1
 
+#define TPM2_ACPI_CLASS_CLIENT      0
+#define TPM2_ACPI_CLASS_SERVER      1
+
+#define TPM2_START_METHOD_MMIO      6
+
 #endif /* HW_ACPI_TPM_H */

include/sysemu/tpm.h

@@ -26,11 +26,18 @@ typedef enum  TPMVersion {
     TPM_VERSION_2_0 = 2,
 } TPMVersion;
 
+TPMVersion tpm_tis_get_tpm_version(Object *obj);
+
 #define TYPE_TPM_TIS                "tpm-tis"
 
-static inline bool tpm_find(void)
+static inline TPMVersion tpm_get_version(void)
 {
-    return object_resolve_path_type("", TYPE_TPM_TIS, NULL);
+    Object *obj = object_resolve_path_type("", TYPE_TPM_TIS, NULL);
+
+    if (obj) {
+        return tpm_tis_get_tpm_version(obj);
+    }
+    return TPM_VERSION_UNSPEC;
 }
 
 #endif /* QEMU_TPM_H */