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-rw-r--r--hw/acpi/tpm.c404
1 files changed, 404 insertions, 0 deletions
diff --git a/hw/acpi/tpm.c b/hw/acpi/tpm.c
new file mode 100644
index 0000000000..9f205378f2
--- /dev/null
+++ b/hw/acpi/tpm.c
@@ -0,0 +1,404 @@
+/* Support for generating ACPI TPM tables
+ *
+ * Copyright (C) 2018 IBM, Corp.
+ * Copyright (C) 2018 Red Hat Inc
+ *
+ * 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 "qemu/osdep.h"
+#include "qapi/error.h"
+#include "hw/acpi/tpm.h"
+
+void tpm_build_ppi_acpi(TPMIf *tpm, Aml *dev)
+{
+ Aml *method, *field, *ifctx, *ifctx2, *ifctx3, *func_mask,
+ *not_implemented, *pak, *tpm2, *tpm3, *pprm, *pprq, *zero, *one;
+
+ if (!object_property_get_bool(OBJECT(tpm), "ppi", &error_abort)) {
+ return;
+ }
+
+ zero = aml_int(0);
+ one = aml_int(1);
+ func_mask = aml_int(TPM_PPI_FUNC_MASK);
+ not_implemented = aml_int(TPM_PPI_FUNC_NOT_IMPLEMENTED);
+
+ /*
+ * TPP2 is for the registers that ACPI code used to pass
+ * the PPI code and parameter (PPRQ, PPRM) to the firmware.
+ */
+ aml_append(dev,
+ aml_operation_region("TPP2", AML_SYSTEM_MEMORY,
+ aml_int(TPM_PPI_ADDR_BASE + 0x100),
+ 0x5A));
+ field = aml_field("TPP2", AML_ANY_ACC, AML_NOLOCK, AML_PRESERVE);
+ aml_append(field, aml_named_field("PPIN", 8));
+ aml_append(field, aml_named_field("PPIP", 32));
+ aml_append(field, aml_named_field("PPRP", 32));
+ aml_append(field, aml_named_field("PPRQ", 32));
+ aml_append(field, aml_named_field("PPRM", 32));
+ aml_append(field, aml_named_field("LPPR", 32));
+ aml_append(dev, field);
+ pprq = aml_name("PPRQ");
+ pprm = aml_name("PPRM");
+
+ /*
+ * DerefOf in Windows is broken with SYSTEM_MEMORY. Use a dynamic
+ * operation region inside of a method for getting FUNC[op].
+ */
+ method = aml_method("TPFN", 1, AML_SERIALIZED);
+ {
+ Aml *op = aml_arg(0);
+ ifctx = aml_if(aml_lgreater_equal(op, aml_int(0x100)));
+ {
+ aml_append(ifctx, aml_return(zero));
+ }
+ aml_append(method, ifctx);
+
+ aml_append(method,
+ aml_operation_region("TPP1", AML_SYSTEM_MEMORY,
+ aml_add(aml_int(TPM_PPI_ADDR_BASE), op, NULL), 0x1));
+ field = aml_field("TPP1", AML_BYTE_ACC, AML_NOLOCK, AML_PRESERVE);
+ aml_append(field, aml_named_field("TPPF", 8));
+ aml_append(method, field);
+ aml_append(method, aml_return(aml_name("TPPF")));
+ }
+ aml_append(dev, method);
+
+ /*
+ * Use global TPM2 & TPM3 variables to workaround Windows ACPI bug
+ * when returning packages.
+ */
+ pak = aml_package(2);
+ aml_append(pak, zero);
+ aml_append(pak, zero);
+ aml_append(dev, aml_name_decl("TPM2", pak));
+ tpm2 = aml_name("TPM2");
+
+ pak = aml_package(3);
+ aml_append(pak, zero);
+ aml_append(pak, zero);
+ aml_append(pak, zero);
+ aml_append(dev, aml_name_decl("TPM3", pak));
+ tpm3 = aml_name("TPM3");
+
+ method = aml_method("_DSM", 4, AML_SERIALIZED);
+ {
+ uint8_t zerobyte[1] = { 0 };
+ Aml *function, *arguments, *rev, *op, *op_arg, *op_flags, *uuid;
+
+ uuid = aml_arg(0);
+ rev = aml_arg(1);
+ function = aml_arg(2);
+ arguments = aml_arg(3);
+ op = aml_local(0);
+ op_flags = aml_local(1);
+
+ /* Physical Presence Interface */
+ ifctx = aml_if(
+ aml_equal(uuid,
+ aml_touuid("3DDDFAA6-361B-4EB4-A424-8D10089D1653")));
+ {
+ /* standard DSM query function */
+ ifctx2 = aml_if(aml_equal(function, zero));
+ {
+ uint8_t byte_list[2] = { 0xff, 0x01 }; /* functions 1-8 */
+
+ aml_append(ifctx2,
+ aml_return(aml_buffer(sizeof(byte_list),
+ byte_list)));
+ }
+ aml_append(ifctx, ifctx2);
+
+ /*
+ * PPI 1.0: 2.1.1 Get Physical Presence Interface Version
+ *
+ * Arg 2 (Integer): Function Index = 1
+ * Arg 3 (Package): Arguments = Empty Package
+ * Returns: Type: String
+ */
+ ifctx2 = aml_if(aml_equal(function, one));
+ {
+ aml_append(ifctx2, aml_return(aml_string("1.3")));
+ }
+ aml_append(ifctx, ifctx2);
+
+ /*
+ * PPI 1.0: 2.1.3 Submit TPM Operation Request to Pre-OS Environment
+ *
+ * Arg 2 (Integer): Function Index = 2
+ * Arg 3 (Package): Arguments = Package: Type: Integer
+ * Operation Value of the Request
+ * Returns: Type: Integer
+ * 0: Success
+ * 1: Operation Value of the Request Not Supported
+ * 2: General Failure
+ */
+ ifctx2 = aml_if(aml_equal(function, aml_int(2)));
+ {
+ /* get opcode */
+ aml_append(ifctx2,
+ aml_store(aml_derefof(aml_index(arguments,
+ zero)), op));
+
+ /* get opcode flags */
+ aml_append(ifctx2,
+ aml_store(aml_call1("TPFN", op), op_flags));
+
+ /* if func[opcode] & TPM_PPI_FUNC_NOT_IMPLEMENTED */
+ ifctx3 = aml_if(
+ aml_equal(
+ aml_and(op_flags, func_mask, NULL),
+ not_implemented));
+ {
+ /* 1: Operation Value of the Request Not Supported */
+ aml_append(ifctx3, aml_return(one));
+ }
+ aml_append(ifctx2, ifctx3);
+
+ aml_append(ifctx2, aml_store(op, pprq));
+ aml_append(ifctx2, aml_store(zero, pprm));
+ /* 0: success */
+ aml_append(ifctx2, aml_return(zero));
+ }
+ aml_append(ifctx, ifctx2);
+
+ /*
+ * PPI 1.0: 2.1.4 Get Pending TPM Operation Requested By the OS
+ *
+ * Arg 2 (Integer): Function Index = 3
+ * Arg 3 (Package): Arguments = Empty Package
+ * Returns: Type: Package of Integers
+ * Integer 1: Function Return code
+ * 0: Success
+ * 1: General Failure
+ * Integer 2: Pending operation requested by the OS
+ * 0: None
+ * >0: Operation Value of the Pending Request
+ * Integer 3: Optional argument to pending operation
+ * requested by the OS
+ * 0: None
+ * >0: Argument Value of the Pending Request
+ */
+ ifctx2 = aml_if(aml_equal(function, aml_int(3)));
+ {
+ /*
+ * Revision ID of 1, no integer parameter beyond
+ * parameter two are expected
+ */
+ ifctx3 = aml_if(aml_equal(rev, one));
+ {
+ /* TPM2[1] = PPRQ */
+ aml_append(ifctx3,
+ aml_store(pprq, aml_index(tpm2, one)));
+ aml_append(ifctx3, aml_return(tpm2));
+ }
+ aml_append(ifctx2, ifctx3);
+
+ /*
+ * A return value of {0, 23, 1} indicates that
+ * operation 23 with argument 1 is pending.
+ */
+ ifctx3 = aml_if(aml_equal(rev, aml_int(2)));
+ {
+ /* TPM3[1] = PPRQ */
+ aml_append(ifctx3,
+ aml_store(pprq, aml_index(tpm3, one)));
+ /* TPM3[2] = PPRM */
+ aml_append(ifctx3,
+ aml_store(pprm, aml_index(tpm3, aml_int(2))));
+ aml_append(ifctx3, aml_return(tpm3));
+ }
+ aml_append(ifctx2, ifctx3);
+ }
+ aml_append(ifctx, ifctx2);
+
+ /*
+ * PPI 1.0: 2.1.5 Get Platform-Specific Action to Transition to
+ * Pre-OS Environment
+ *
+ * Arg 2 (Integer): Function Index = 4
+ * Arg 3 (Package): Arguments = Empty Package
+ * Returns: Type: Integer
+ * 0: None
+ * 1: Shutdown
+ * 2: Reboot
+ * 3: OS Vendor-specific
+ */
+ ifctx2 = aml_if(aml_equal(function, aml_int(4)));
+ {
+ /* reboot */
+ aml_append(ifctx2, aml_return(aml_int(2)));
+ }
+ aml_append(ifctx, ifctx2);
+
+ /*
+ * PPI 1.0: 2.1.6 Return TPM Operation Response to OS Environment
+ *
+ * Arg 2 (Integer): Function Index = 5
+ * Arg 3 (Package): Arguments = Empty Package
+ * Returns: Type: Package of Integer
+ * Integer 1: Function Return code
+ * 0: Success
+ * 1: General Failure
+ * Integer 2: Most recent operation request
+ * 0: None
+ * >0: Operation Value of the most recent request
+ * Integer 3: Response to the most recent operation request
+ * 0: Success
+ * 0x00000001..0x00000FFF: Corresponding TPM
+ * error code
+ * 0xFFFFFFF0: User Abort or timeout of dialog
+ * 0xFFFFFFF1: firmware Failure
+ */
+ ifctx2 = aml_if(aml_equal(function, aml_int(5)));
+ {
+ /* TPM3[1] = LPPR */
+ aml_append(ifctx2,
+ aml_store(aml_name("LPPR"),
+ aml_index(tpm3, one)));
+ /* TPM3[2] = PPRP */
+ aml_append(ifctx2,
+ aml_store(aml_name("PPRP"),
+ aml_index(tpm3, aml_int(2))));
+ aml_append(ifctx2, aml_return(tpm3));
+ }
+ aml_append(ifctx, ifctx2);
+
+ /*
+ * PPI 1.0: 2.1.7 Submit preferred user language
+ *
+ * Arg 2 (Integer): Function Index = 6
+ * Arg 3 (Package): Arguments = String Package
+ * Preferred language code
+ * Returns: Type: Integer
+ * Function Return Code
+ * 3: Not implemented
+ */
+ ifctx2 = aml_if(aml_equal(function, aml_int(6)));
+ {
+ /* 3 = not implemented */
+ aml_append(ifctx2, aml_return(aml_int(3)));
+ }
+ aml_append(ifctx, ifctx2);
+
+ /*
+ * PPI 1.1: 2.1.7 Submit TPM Operation Request to
+ * Pre-OS Environment 2
+ *
+ * Arg 2 (Integer): Function Index = 7
+ * Arg 3 (Package): Arguments = Package: Type: Integer
+ * Integer 1: Operation Value of the Request
+ * Integer 2: Argument for Operation (optional)
+ * Returns: Type: Integer
+ * 0: Success
+ * 1: Not Implemented
+ * 2: General Failure
+ * 3: Operation blocked by current firmware settings
+ */
+ ifctx2 = aml_if(aml_equal(function, aml_int(7)));
+ {
+ /* get opcode */
+ aml_append(ifctx2, aml_store(aml_derefof(aml_index(arguments,
+ zero)),
+ op));
+
+ /* get opcode flags */
+ aml_append(ifctx2, aml_store(aml_call1("TPFN", op),
+ op_flags));
+ /* if func[opcode] & TPM_PPI_FUNC_NOT_IMPLEMENTED */
+ ifctx3 = aml_if(
+ aml_equal(
+ aml_and(op_flags, func_mask, NULL),
+ not_implemented));
+ {
+ /* 1: not implemented */
+ aml_append(ifctx3, aml_return(one));
+ }
+ aml_append(ifctx2, ifctx3);
+
+ /* if func[opcode] & TPM_PPI_FUNC_BLOCKED */
+ ifctx3 = aml_if(
+ aml_equal(
+ aml_and(op_flags, func_mask, NULL),
+ aml_int(TPM_PPI_FUNC_BLOCKED)));
+ {
+ /* 3: blocked by firmware */
+ aml_append(ifctx3, aml_return(aml_int(3)));
+ }
+ aml_append(ifctx2, ifctx3);
+
+ /* revision to integer */
+ ifctx3 = aml_if(aml_equal(rev, one));
+ {
+ /* revision 1 */
+ /* PPRQ = op */
+ aml_append(ifctx3, aml_store(op, pprq));
+ /* no argument, PPRM = 0 */
+ aml_append(ifctx3, aml_store(zero, pprm));
+ }
+ aml_append(ifctx2, ifctx3);
+
+ ifctx3 = aml_if(aml_equal(rev, aml_int(2)));
+ {
+ /* revision 2 */
+ /* PPRQ = op */
+ op_arg = aml_derefof(aml_index(arguments, one));
+ aml_append(ifctx3, aml_store(op, pprq));
+ /* PPRM = arg3[1] */
+ aml_append(ifctx3, aml_store(op_arg, pprm));
+ }
+ aml_append(ifctx2, ifctx3);
+ /* 0: success */
+ aml_append(ifctx2, aml_return(zero));
+ }
+ aml_append(ifctx, ifctx2);
+
+ /*
+ * PPI 1.1: 2.1.8 Get User Confirmation Status for Operation
+ *
+ * Arg 2 (Integer): Function Index = 8
+ * Arg 3 (Package): Arguments = Package: Type: Integer
+ * Operation Value that may need user confirmation
+ * Returns: Type: Integer
+ * 0: Not implemented
+ * 1: Firmware only
+ * 2: Blocked for OS by firmware configuration
+ * 3: Allowed and physically present user required
+ * 4: Allowed and physically present user not required
+ */
+ ifctx2 = aml_if(aml_equal(function, aml_int(8)));
+ {
+ /* get opcode */
+ aml_append(ifctx2,
+ aml_store(aml_derefof(aml_index(arguments,
+ zero)),
+ op));
+
+ /* get opcode flags */
+ aml_append(ifctx2, aml_store(aml_call1("TPFN", op),
+ op_flags));
+ /* return confirmation status code */
+ aml_append(ifctx2,
+ aml_return(
+ aml_and(op_flags, func_mask, NULL)));
+ }
+ aml_append(ifctx, ifctx2);
+
+ aml_append(ifctx, aml_return(aml_buffer(1, zerobyte)));
+ }
+ aml_append(method, ifctx);
+ }
+ aml_append(dev, method);
+}
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