b23571c18e
<types.h> already provides <commonlib/bsd/cb_err.h>, <limits.h>, <stdbool.h>, <stdint.h> and <stddef.h> headers. Change-Id: I700b3f0e864ecce3f8b3b66f3bf6c8f1040acee1 Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/c/coreboot/+/60437 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Julius Werner <jwerner@chromium.org>
132 lines
3 KiB
C
132 lines
3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#include <types.h>
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#include <acpi/acpi.h>
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#include <acpi/acpigen.h>
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#include <acpi/acpi_device.h>
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#include "tpm_ppi.h"
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static void tpm_ppi_func0_cb(void *arg)
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{
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/* Functions 1-8. */
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u8 buf[] = {0xff, 0x01};
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acpigen_write_return_byte_buffer(buf, sizeof(buf));
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}
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static void tpm_ppi_func1_cb(void *arg)
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{
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if (CONFIG(TPM2))
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/* Interface version: 1.3 */
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acpigen_write_return_string("1.3");
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else
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/* Interface version: 1.2 */
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acpigen_write_return_string("1.2");
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}
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static void tpm_ppi_func2_cb(void *arg)
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{
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/* Submit operations: drop on the floor and return success. */
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acpigen_write_return_byte(PPI2_RET_SUCCESS);
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}
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static void tpm_ppi_func3_cb(void *arg)
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{
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/* Pending operation: none. */
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acpigen_emit_byte(RETURN_OP);
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acpigen_write_package(2);
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acpigen_write_byte(0);
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acpigen_write_byte(0);
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acpigen_pop_len();
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}
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static void tpm_ppi_func4_cb(void *arg)
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{
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/* Pre-OS transition method: reboot. */
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acpigen_write_return_byte(2);
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}
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static void tpm_ppi_func5_cb(void *arg)
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{
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/* Operation response: no operation executed. */
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acpigen_emit_byte(RETURN_OP);
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acpigen_write_package(3);
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acpigen_write_byte(0);
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acpigen_write_byte(0);
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acpigen_write_byte(0);
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acpigen_pop_len();
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}
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static void tpm_ppi_func6_cb(void *arg)
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{
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/*
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* Set preferred user language: deprecated and must return 3 AKA
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* "not implemented".
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*/
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acpigen_write_return_byte(PPI6_RET_NOT_IMPLEMENTED);
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}
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static void tpm_ppi_func7_cb(void *arg)
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{
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/* Submit operations: deny. */
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acpigen_write_return_byte(PPI7_RET_BLOCKED_BY_FIRMWARE);
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}
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static void tpm_ppi_func8_cb(void *arg)
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{
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/* All actions are forbidden. */
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acpigen_write_return_byte(PPI8_RET_FIRMWARE_ONLY);
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}
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static void (*tpm_ppi_callbacks[])(void *) = {
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tpm_ppi_func0_cb,
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tpm_ppi_func1_cb,
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tpm_ppi_func2_cb,
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tpm_ppi_func3_cb,
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tpm_ppi_func4_cb,
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tpm_ppi_func5_cb,
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tpm_ppi_func6_cb,
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tpm_ppi_func7_cb,
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tpm_ppi_func8_cb,
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};
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static void tpm_mci_func0_cb(void *arg)
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{
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/* Function 1. */
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acpigen_write_return_singleton_buffer(0x3);
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}
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static void tpm_mci_func1_cb(void *arg)
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{
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/* Just return success. */
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acpigen_write_return_byte(0);
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}
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static void (*tpm_mci_callbacks[])(void *) = {
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tpm_mci_func0_cb,
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tpm_mci_func1_cb,
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};
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void tpm_ppi_acpi_fill_ssdt(const struct device *dev)
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{
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/*
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* _DSM method
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*/
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struct dsm_uuid ids[] = {
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/* Physical presence interface.
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* This is used to submit commands like "Clear TPM" to
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* be run at next reboot provided that user confirms
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* them. Spec allows user to cancel all commands and/or
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* configure BIOS to reject commands. So we pretend that
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* user did just this: cancelled everything. If user
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* really wants to clear TPM the only option now is to
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* do it manually in payload.
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*/
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DSM_UUID(TPM_PPI_UUID, tpm_ppi_callbacks,
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ARRAY_SIZE(tpm_ppi_callbacks), NULL),
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/* Memory clearing on boot: just a dummy. */
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DSM_UUID(TPM_MCI_UUID, tpm_mci_callbacks,
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ARRAY_SIZE(tpm_mci_callbacks), NULL),
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};
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acpigen_write_dsm_uuid_arr(ids, ARRAY_SIZE(ids));
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}
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