[PATCH 2/2] acpi: Add TPM2 interface definition.

[Jennifer Herbert <jennifer.herbert@xxxxxxxxxx>]

This patch introduces an optional TPM 2 interface definition to the ACPI table,
which is to be used as part of a vTPM 2 implementation.

Signed-off-by: Jennifer Herbert <jennifer.herbert@xxxxxxxxxx>
---
 tools/firmware/hvmloader/config.h |  1 +
 tools/firmware/hvmloader/util.c   |  7 ++++++
 tools/libacpi/Makefile            |  2 +-
 tools/libacpi/acpi2_0.h           | 26 ++++++++++++++++++++++
 tools/libacpi/build.c             | 35 ++++++++++++++++++++++++++++++
 tools/libacpi/libacpi.h           |  1 +
 tools/libacpi/ssdt_tpm2.asl       | 36 +++++++++++++++++++++++++++++++
 7 files changed, 107 insertions(+), 1 deletion(-)
 create mode 100644 tools/libacpi/ssdt_tpm2.asl

diff --git a/tools/firmware/hvmloader/config.h 
b/tools/firmware/hvmloader/config.h
index c82adf6dc5..4dec7195f0 100644
--- a/tools/firmware/hvmloader/config.h
+++ b/tools/firmware/hvmloader/config.h
@@ -56,6 +56,7 @@ extern uint8_t ioapic_version;
 #define PCI_ISA_IRQ_MASK    0x0c20U /* ISA IRQs 5,10,11 are PCI connected */
 
 #define ACPI_TIS_HDR_ADDRESS 0xFED40F00UL
+#define ACPI_CRB_HDR_ADDRESS 0xFED40034UL
 
 extern uint32_t pci_mem_start;
 extern const uint32_t pci_mem_end;
diff --git a/tools/firmware/hvmloader/util.c b/tools/firmware/hvmloader/util.c
index 87bc2d677f..6e5d3609b9 100644
--- a/tools/firmware/hvmloader/util.c
+++ b/tools/firmware/hvmloader/util.c
@@ -1009,6 +1009,13 @@ void hvmloader_acpi_build_tables(struct acpi_config 
*config,
         config->table_flags |= ACPI_HAS_TPM;
         config->tis_hdr = (uint16_t *)ACPI_TIS_HDR_ADDRESS;
         break;
+    case 2:
+        config->table_flags |= ACPI_HAS_TPM;
+        config->crb_hdr = (uint16_t *)ACPI_CRB_HDR_ADDRESS;
+
+        mem_hole_populate_ram(TPM_LOG_AREA_ADDRESS >> PAGE_SHIFT, TPM_LOG_SIZE 
>> PAGE_SHIFT);
+        memset((void *)(TPM_LOG_AREA_ADDRESS), 0, TPM_LOG_SIZE);
+        break;
     }
 
     config->numa.nr_vmemranges = nr_vmemranges;
diff --git a/tools/libacpi/Makefile b/tools/libacpi/Makefile
index 60860eaa00..125f29fb54 100644
--- a/tools/libacpi/Makefile
+++ b/tools/libacpi/Makefile
@@ -25,7 +25,7 @@ C_SRC-$(CONFIG_X86) = dsdt_anycpu.c dsdt_15cpu.c 
dsdt_anycpu_qemu_xen.c dsdt_pvh
 C_SRC-$(CONFIG_ARM_64) = dsdt_anycpu_arm.c
 DSDT_FILES ?= $(C_SRC-y)
 C_SRC = $(addprefix $(ACPI_BUILD_DIR)/, $(DSDT_FILES))
-H_SRC = $(addprefix $(ACPI_BUILD_DIR)/, ssdt_s3.h ssdt_s4.h ssdt_pm.h 
ssdt_tpm.h ssdt_laptop_slate.h)
+H_SRC = $(addprefix $(ACPI_BUILD_DIR)/, ssdt_s3.h ssdt_s4.h ssdt_pm.h 
ssdt_tpm.h ssdt_tpm2.h ssdt_laptop_slate.h)
 
 MKDSDT_CFLAGS-$(CONFIG_ARM_64) = -DCONFIG_ARM_64
 MKDSDT_CFLAGS-$(CONFIG_X86) = -DCONFIG_X86
diff --git a/tools/libacpi/acpi2_0.h b/tools/libacpi/acpi2_0.h
index 2619ba32db..f4eb4d715b 100644
--- a/tools/libacpi/acpi2_0.h
+++ b/tools/libacpi/acpi2_0.h
@@ -121,6 +121,30 @@ struct acpi_20_tcpa {
 };
 #define ACPI_2_0_TCPA_LAML_SIZE (64*1024)
 
+/*
+ * TPM2
+ */
+struct acpi_20_tpm2 {
+    struct acpi_header header;
+    uint16_t platform_class;
+    uint16_t reserved;
+    uint64_t control_area_address;
+    uint32_t start_method;
+    uint8_t start_method_params[12];
+    uint32_t log_area_minimum_length;
+    uint64_t log_area_start_address;
+};
+#define TPM2_ACPI_CLASS_CLIENT      0
+#define TPM2_START_METHOD_CRB       7
+
+#define TPM_CRB_ADDR_BASE           0xFED40000
+#define TPM_CRB_ADDR_CTRL           (TPM_CRB_ADDR_BASE + 0x40)
+
+#define TPM_LOG_AREA_ADDRESS        0xFED50000
+
+#define TPM_LOG_AREA_MINIMUM_SIZE   (64 << 10)
+#define TPM_LOG_SIZE                (64 << 10)
+
 /*
  * Fixed ACPI Description Table Structure (FADT) in ACPI 1.0.
  */
@@ -431,6 +455,7 @@ struct acpi_20_slit {
 #define ACPI_2_0_RSDT_SIGNATURE ASCII32('R','S','D','T')
 #define ACPI_2_0_XSDT_SIGNATURE ASCII32('X','S','D','T')
 #define ACPI_2_0_TCPA_SIGNATURE ASCII32('T','C','P','A')
+#define ACPI_2_0_TPM2_SIGNATURE ASCII32('T','P','M','2')
 #define ACPI_2_0_HPET_SIGNATURE ASCII32('H','P','E','T')
 #define ACPI_2_0_WAET_SIGNATURE ASCII32('W','A','E','T')
 #define ACPI_2_0_SRAT_SIGNATURE ASCII32('S','R','A','T')
@@ -444,6 +469,7 @@ struct acpi_20_slit {
 #define ACPI_2_0_RSDT_REVISION 0x01
 #define ACPI_2_0_XSDT_REVISION 0x01
 #define ACPI_2_0_TCPA_REVISION 0x02
+#define ACPI_2_0_TPM2_REVISION 0x04
 #define ACPI_2_0_HPET_REVISION 0x01
 #define ACPI_2_0_WAET_REVISION 0x01
 #define ACPI_1_0_FADT_REVISION 0x01
diff --git a/tools/libacpi/build.c b/tools/libacpi/build.c
index d313ccd8cf..d4f25a68d2 100644
--- a/tools/libacpi/build.c
+++ b/tools/libacpi/build.c
@@ -19,6 +19,7 @@
 #include "ssdt_s3.h"
 #include "ssdt_s4.h"
 #include "ssdt_tpm.h"
+#include "ssdt_tpm2.h"
 #include "ssdt_pm.h"
 #include "ssdt_laptop_slate.h"
 #include <xen/hvm/hvm_info_table.h>
@@ -352,6 +353,7 @@ static int construct_secondary_tables(struct acpi_ctxt 
*ctxt,
     struct acpi_20_tcpa *tcpa;
     unsigned char *ssdt;
     void *lasa;
+    struct acpi_20_tpm2 *tpm2;
 
     /* MADT. */
     if ( (config->hvminfo->nr_vcpus > 1) || config->hvminfo->apic_mode )
@@ -449,6 +451,39 @@ static int construct_secondary_tables(struct acpi_ctxt 
*ctxt,
                              tcpa->header.length);
             }
             break;
+
+        case 2:
+            if (!config->crb_hdr ||
+                config->crb_hdr[0] == 0 || config->crb_hdr[0] == 0xffff)
+                break;
+
+            ssdt = ctxt->mem_ops.alloc(ctxt, sizeof(ssdt_tpm2), 16);
+            if (!ssdt) return -1;
+            memcpy(ssdt, ssdt_tpm2, sizeof(ssdt_tpm2));
+            table_ptrs[nr_tables++] = ctxt->mem_ops.v2p(ctxt, ssdt);
+
+            tpm2 = ctxt->mem_ops.alloc(ctxt, sizeof(struct acpi_20_tpm2), 16);
+            if (!tpm2) return -1;
+            memset(tpm2, 0, sizeof(*tpm2));
+            table_ptrs[nr_tables++] = ctxt->mem_ops.v2p(ctxt, tpm2);
+
+            tpm2->header.signature = ACPI_2_0_TPM2_SIGNATURE;
+            tpm2->header.length    = sizeof(*tpm2);
+            tpm2->header.revision  = ACPI_2_0_TPM2_REVISION;
+            fixed_strcpy(tpm2->header.oem_id, ACPI_OEM_ID);
+            fixed_strcpy(tpm2->header.oem_table_id, ACPI_OEM_TABLE_ID);
+            tpm2->header.oem_revision = ACPI_OEM_REVISION;
+            tpm2->header.creator_id   = ACPI_CREATOR_ID;
+            tpm2->header.creator_revision = ACPI_CREATOR_REVISION;
+            tpm2->platform_class = TPM2_ACPI_CLASS_CLIENT;
+            tpm2->control_area_address = TPM_CRB_ADDR_CTRL;
+            tpm2->start_method = TPM2_START_METHOD_CRB;
+            tpm2->log_area_minimum_length = TPM_LOG_AREA_MINIMUM_SIZE;
+            tpm2->log_area_start_address = TPM_LOG_AREA_ADDRESS;
+
+            set_checksum(tpm2,
+                         offsetof(struct acpi_header, checksum),
+                         tpm2->header.length);
         }
     }
 
diff --git a/tools/libacpi/libacpi.h b/tools/libacpi/libacpi.h
index 9143616130..b5d08ff09b 100644
--- a/tools/libacpi/libacpi.h
+++ b/tools/libacpi/libacpi.h
@@ -80,6 +80,7 @@ struct acpi_config {
 
     uint8_t tpm_version;
     const uint16_t *tis_hdr;
+    const uint16_t *crb_hdr;
     /*
      * Address where acpi_info should be placed.
      * This must match the OperationRegion(BIOS, SystemMemory, ....)
diff --git a/tools/libacpi/ssdt_tpm2.asl b/tools/libacpi/ssdt_tpm2.asl
new file mode 100644
index 0000000000..1801c338df
--- /dev/null
+++ b/tools/libacpi/ssdt_tpm2.asl
@@ -0,0 +1,36 @@
+/*
+ * ssdt_tpm2.asl
+ *
+ * Copyright (c) 2018-2022, Citrix Systems, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; version 2.1 only. with the special
+ * exception on linking described in file LICENSE.
+ *
+ * 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 Lesser General Public License for more details.
+ */
+
+/* SSDT for TPM CRB Interface for Xen with Qemu device model. */
+
+DefinitionBlock ("SSDT_TPM2.aml", "SSDT", 2, "Xen", "HVM", 0)
+{
+    Device (TPM)
+    {
+        Name (_HID, "MSFT0101" /* TPM 2.0 Security Device */)  // _HID: 
Hardware ID
+        Name (_CRS, ResourceTemplate ()  // _CRS: Current Resource Settings
+        {
+            Memory32Fixed (ReadWrite,
+                0xFED40000,         // Address Base
+                0x00001000,         // Address Length
+                )
+        })
+        Method (_STA, 0, NotSerialized)  // _STA: Status
+        {
+            Return (0x0F)
+        }
+    }
+}
-- 
2.31.1