===================================================================
@@ -0,0 +1,22 @@
+DefinitionBlock (
+ "acpi-tpm-ssdt.aml",// Output Filename
+ "SSDT", // Signature
+ 0x01, // SSDT Compliance Revision
+ "BXPC", // OEMID
+ "BXSSDT", // TABLE ID
+ 0x1 // OEM Revision
+ )
+{
+ /* TPM with emulated TPM TIS interface */
+ Device (TPM) {
+ Name (_HID, EisaID ("PNP0C31"))
+ Name (_CRS, ResourceTemplate ()
+ {
+ Memory32Fixed (ReadWrite, 0xFED40000, 0x00005000)
+ //IRQNoFlags () {11}
+ })
+ Method (_STA, 0, NotSerialized) {
+ Return (0x0F)
+ }
+ }
+}
===================================================================
@@ -0,0 +1,26 @@
+/*
+ *
+ * Intel ACPI Component Architecture
+ * ASL Optimizing Compiler version 20101013-64 [Nov 21 2010]
+ * Copyright (c) 2000 - 2010 Intel Corporation
+ *
+ * Compilation of "out/.dsl.i" - Mon Apr 4 15:44:33 2011
+ *
+ * C source code output
+ * AML code block contains 0x56 bytes
+ *
+ */
+unsigned char AmlCode_TPM[] =
+{
+ 0x53,0x53,0x44,0x54,0x56,0x00,0x00,0x00, /* 00000000 "SSDTV..." */
+ 0x01,0x13,0x42,0x58,0x50,0x43,0x00,0x00, /* 00000008 "..BXPC.." */
+ 0x42,0x58,0x53,0x53,0x44,0x54,0x00,0x00, /* 00000010 "BXSSDT.." */
+ 0x01,0x00,0x00,0x00,0x49,0x4E,0x54,0x4C, /* 00000018 "....INTL" */
+ 0x13,0x10,0x10,0x20,0x5B,0x82,0x30,0x54, /* 00000020 "... [.0T" */
+ 0x50,0x4D,0x5F,0x08,0x5F,0x48,0x49,0x44, /* 00000028 "PM_._HID" */
+ 0x0C,0x41,0xD0,0x0C,0x31,0x08,0x5F,0x43, /* 00000030 ".A..1._C" */
+ 0x52,0x53,0x11,0x11,0x0A,0x0E,0x86,0x09, /* 00000038 "RS......" */
+ 0x00,0x01,0x00,0x00,0xD4,0xFE,0x00,0x50, /* 00000040 ".......P" */
+ 0x00,0x00,0x79,0x00,0x14,0x09,0x5F,0x53, /* 00000048 "..y..._S" */
+ 0x54,0x41,0x00,0xA4,0x0A,0x0F /* 00000050 "TA...." */
+};
===================================================================
@@ -20,7 +20,7 @@ SRC16=$(SRCBOTH) system.c disk.c font.c
SRC32FLAT=$(SRCBOTH) post.c shadow.c memmap.c coreboot.c boot.c \
acpi.c smm.c mptable.c smbios.c pciinit.c optionroms.c mtrr.c \
lzmadecode.c bootsplash.c jpeg.c usb-hub.c paravirt.c dev-i440fx.c \
- pci_region.c
+ pci_region.c tcgbios.c tpm_drivers.c
SRC32SEG=util.c output.c pci.c pcibios.c apm.c stacks.c
cc-option = $(shell if test -z "`$(1) $(2) -S -o /dev/null -xc \
@@ -192,13 +192,20 @@ $(OUT)vgabios.bin: $(OUT)vgabios.bin.raw
$(Q)./tools/buildrom.py $< $@
####### dsdt build rules
+src/acpi-tpm-ssdt.hex: src/acpi-tpm-ssdt.dsl
+ @echo "Compiling TPM SSDT"
+ $(Q)cpp -P $< > $(OUT)$*.dsl.i
+ $(Q)iasl -tc -p $(OUT)$* $(OUT)$*.dsl.i
+ $(Q)cp $(OUT)$*.hex $@
+ $(Q)sed -i 's/AmlCode/AmlCode_TPM/' $@
+
src/%.hex: src/%.dsl
@echo "Compiling DSDT"
$(Q)cpp -P $< > $(OUT)$*.dsl.i
$(Q)iasl -tc -p $(OUT)$* $(OUT)$*.dsl.i
$(Q)cp $(OUT)$*.hex $@
-$(OUT)ccode32flat.o: src/acpi-dsdt.hex
+$(OUT)ccode32flat.o: src/acpi-dsdt.hex src/acpi-tpm-ssdt.hex
####### Kconfig rules
export HOSTCC := $(CC)
===================================================================
@@ -13,6 +13,8 @@
#include "pci_regs.h" // PCI_INTERRUPT_LINE
#include "paravirt.h"
#include "dev-i440fx.h" // piix4_fadt_init
+#include "acpi-tpm-ssdt.hex"
+#include "tcgbios.h" // has_working_tpm
/****************************************************/
/* ACPI tables init */
@@ -586,6 +588,39 @@ static const struct pci_device_id acpi_f
PCI_DEVICE_END,
};
+
+static u32 add_tpm_device(void **tpm_addr, void **tcpa_addr)
+{
+ struct tcpa_descriptor_rev2 *tcpa;
+
+ *tpm_addr = NULL;
+ *tcpa_addr = NULL;
+
+ if (has_working_tpm()) {
+ u32 laml = 64 * 1024;
+ *tpm_addr = malloc_high(sizeof(AmlCode_TPM));
+
+ tcpa = malloc_high(sizeof(*tcpa) + laml);
+ if (!tcpa || !*tpm_addr) {
+ warn_noalloc();
+ return 1;
+ }
+
+ if (*tpm_addr)
+ memcpy(*tpm_addr, AmlCode_TPM, sizeof(AmlCode_TPM));
+
+ memset(tcpa, 0x0, sizeof(*tcpa) + laml);
+ u64 lasa = (u32)tcpa + sizeof(*tcpa);
+
+ tcpa->laml = laml;
+ tcpa->lasa = lasa;
+ build_header((void*)tcpa, TCPA_SIGNATURE, sizeof(*tcpa), 2);
+
+ *tcpa_addr = tcpa;
+ }
+ return 0;
+}
+
struct rsdp_descriptor *RsdpAddr;
#define MAX_ACPI_TABLES 20
@@ -642,6 +677,12 @@ acpi_bios_init(void)
}
}
+ void *tcpa, *tpm;
+ if (add_tpm_device(&tpm, &tcpa))
+ return;
+ ACPI_INIT_TABLE(tpm);
+ ACPI_INIT_TABLE(tcpa);
+
struct rsdt_descriptor_rev1 *rsdt;
size_t rsdt_len = sizeof(*rsdt) + sizeof(u32) * tbl_idx;
rsdt = malloc_high(rsdt_len);
===================================================================
@@ -98,4 +98,24 @@ struct fadt_descriptor_rev1
#endif
} PACKED;
+
+struct rsdt_descriptor {
+ ACPI_TABLE_HEADER_DEF
+ u32 entry[1];
+} PACKED;
+
+#define TCPA_SIGNATURE 0x41504354
+struct tcpa_descriptor_rev2
+{
+ ACPI_TABLE_HEADER_DEF
+ u16 platform_class;
+ u32 laml;
+ u64 lasa;
+} PACKED;
+
+/* TCPA ACPI definitions */
+#define TCPA_ACPI_CLASS_CLIENT 0
+#define TCPA_ACPI_CLASS_SERVER 1
+
+
#endif // acpi.h
===================================================================
@@ -26,7 +26,7 @@
// Space to reserve in f-segment for dynamic allocations
#define CONFIG_MAX_BIOSTABLE 2048
// Space to reserve in high-memory for tables
-#define CONFIG_MAX_HIGHTABLE (64*1024)
+#define CONFIG_MAX_HIGHTABLE (96*1024)
// Largest supported externaly facing drive id
#define CONFIG_MAX_EXTDRIVE 16
===================================================================
@@ -0,0 +1,72 @@
+// Implementation of the TCG BIOS extension according to the specification
+// described in
+// https://www.trustedcomputinggroup.org/specs/PCClient/TCG_PCClientImplementationforBIOS_1-20_1-00.pdf
+//
+// Copyright (C) 2006-2011 IBM Corporation
+// Copyright (C) 2006-2011 Stefan Berger <stefanb@us.ibm.com>
+//
+// This file may be distributed under the terms of the GNU LGPLv3 license.
+
+
+#include "config.h"
+
+#include "types.h"
+#include "tpm_drivers.h" // tpm_drivers[]
+
+
+typedef struct {
+ u8 tpm_probed:1;
+ u8 tpm_found:1;
+ u8 tpm_working:1;
+ u8 if_shutdown:1;
+ u8 tpm_driver_to_use:4;
+} tcpa_state_t;
+
+
+static tcpa_state_t tcpa_state = {
+ .tpm_driver_to_use = TPM_INVALID_DRIVER,
+};
+
+extern struct tpm_driver tpm_drivers[];
+
+
+/********************************************************
+ Extensions for TCG-enabled BIOS
+ *******************************************************/
+
+
+static u32
+is_tpm_present(void)
+{
+ u32 rc = 0;
+ unsigned int i;
+
+ for (i = 0; i < TPM_NUM_DRIVERS; i++) {
+ struct tpm_driver *td = &tpm_drivers[i];
+ if (td->probe() != 0) {
+ td->init();
+ tcpa_state.tpm_driver_to_use = i;
+ rc = 1;
+ break;
+ }
+ }
+
+ return rc;
+}
+
+
+int
+has_working_tpm(void)
+{
+ if (!tcpa_state.tpm_probed) {
+ tcpa_state.tpm_probed = 1;
+ tcpa_state.tpm_found = (is_tpm_present() != 0);
+ tcpa_state.tpm_working = 1;
+ }
+ if (!tcpa_state.tpm_working)
+ return 0;
+
+ return tcpa_state.tpm_found;
+}
+
+
===================================================================
@@ -0,0 +1,57 @@
+#ifndef TCGBIOS_H
+#define TCGBIOS_H
+
+
+#define TPM_OK 0x0
+#define TPM_RET_BASE 0x1
+#define TCG_GENERAL_ERROR (TPM_RET_BASE + 0x0)
+#define TCG_TPM_IS_LOCKED (TPM_RET_BASE + 0x1)
+#define TCG_NO_RESPONSE (TPM_RET_BASE + 0x2)
+#define TCG_INVALID_RESPONSE (TPM_RET_BASE + 0x3)
+#define TCG_INVALID_ACCESS_REQUEST (TPM_RET_BASE + 0x4)
+#define TCG_FIRMWARE_ERROR (TPM_RET_BASE + 0x5)
+#define TCG_INTEGRITY_CHECK_FAILED (TPM_RET_BASE + 0x6)
+#define TCG_INVALID_DEVICE_ID (TPM_RET_BASE + 0x7)
+#define TCG_INVALID_VENDOR_ID (TPM_RET_BASE + 0x8)
+#define TCG_UNABLE_TO_OPEN (TPM_RET_BASE + 0x9)
+#define TCG_UNABLE_TO_CLOSE (TPM_RET_BASE + 0xa)
+#define TCG_RESPONSE_TIMEOUT (TPM_RET_BASE + 0xb)
+#define TCG_INVALID_COM_REQUEST (TPM_RET_BASE + 0xc)
+#define TCG_INVALID_ADR_REQUEST (TPM_RET_BASE + 0xd)
+#define TCG_WRITE_BYTE_ERROR (TPM_RET_BASE + 0xe)
+#define TCG_READ_BYTE_ERROR (TPM_RET_BASE + 0xf)
+#define TCG_BLOCK_WRITE_TIMEOUT (TPM_RET_BASE + 0x10)
+#define TCG_CHAR_WRITE_TIMEOUT (TPM_RET_BASE + 0x11)
+#define TCG_CHAR_READ_TIMEOUT (TPM_RET_BASE + 0x12)
+#define TCG_BLOCK_READ_TIMEOUT (TPM_RET_BASE + 0x13)
+#define TCG_TRANSFER_ABORT (TPM_RET_BASE + 0x14)
+#define TCG_INVALID_DRV_FUNCTION (TPM_RET_BASE + 0x15)
+#define TCG_OUTPUT_BUFFER_TOO_SHORT (TPM_RET_BASE + 0x16)
+#define TCG_FATAL_COM_ERROR (TPM_RET_BASE + 0x17)
+#define TCG_INVALID_INPUT_PARA (TPM_RET_BASE + 0x18)
+#define TCG_TCG_COMMAND_ERROR (TPM_RET_BASE + 0x19)
+#define TCG_INTERFACE_SHUTDOWN (TPM_RET_BASE + 0x20)
+//define TCG_PC_UNSUPPORTED (TPM_RET_BASE + 0x21)
+#define TCG_PC_TPM_NOT_PRESENT (TPM_RET_BASE + 0x22)
+#define TCG_PC_TPM_DEACTIVATED (TPM_RET_BASE + 0x23)
+
+
+#define TPM_INVALID_ADR_REQUEST TCG_INVALID_ADR_REQUEST
+#define TPM_IS_LOCKED TCG_TPM_IS_LOCKED
+#define TPM_INVALID_DEVICE_ID TCG_INVALID_DEVICE_ID
+#define TPM_INVALID_VENDOR_ID TCG_INVALID_VENDOR_ID
+//define TPM_RESERVED_REG_INVALID
+#define TPM_FIRMWARE_ERROR TCG_FIRMWARE_ERROR
+#define TPM_UNABLE_TO_OPEN TCG_UNABLE_TO_OPEN
+#define TPM_UNABLE_TO_CLOSE TCG_UNABLE_TO_CLOSE
+#define TPM_INVALID_RESPONSE TCG_INVALID_RESPONSE
+#define TPM_RESPONSE_TIMEOUT TCG_RESPONSE_TIMEOUT
+#define TPM_INVALID_ACCESS_REQUEST TCG_INVALID_ACCESS_REQUEST
+#define TPM_TRANSFER_ABORT TCG_TRANSFER_ABORT
+#define TPM_GENERAL_ERROR TCG_GENERAL_ERROR
+
+
+int has_working_tpm(void);
+
+
+#endif /* TCGBIOS_H */
This patch provides ACPI support for the TPM device. It probes for the TPM device and only if a TPM device is found then the TPM's SSDT and TCPA table are created. This patch also connects them to the RSDT. Since the logging area in the TCPA table requires 64kb, the memory reserved for ACPI tables (config.h) is increased to 96kb. This patch requires the subsequent patch for it to compile and work. The IRQ description in the TPM's SSDT is commented since it will be 'safer' to run the TPM in polling mode - the Linux TPM TIS driver for example has too many issues when run in interrupt mode. The description of the TCPA (client) table can be found here: http://www.trustedcomputinggroup.org/resources/server_work_group_acpi_general_specification_version_10 The compiled SSDT description is also part of this patch. v2: - Increasing the CONFIG_MAX_HIGHTABLE to 96kb - Adding cut-down tcgbios.c|h to keep SeaBIOS compiling - Build tpm_drivers.c and tcgbios.c -> TPM's SSDT and TCPA tables are now visible in Linux Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> --- Makefile | 11 ++++++- src/acpi-tpm-ssdt.dsl | 22 +++++++++++++++ src/acpi-tpm-ssdt.hex | 26 ++++++++++++++++++ src/acpi.c | 41 ++++++++++++++++++++++++++++ src/acpi.h | 20 +++++++++++++ src/config.h | 2 - src/tcgbios.c | 72 ++++++++++++++++++++++++++++++++++++++++++++++++++ src/tcgbios.h | 57 +++++++++++++++++++++++++++++++++++++++ 8 files changed, 248 insertions(+), 3 deletions(-)