change wifi driver to cypress

hc

2024-01-05 071106ecf68c401173c58808b1cf5f68cc50d390

 kernel/drivers/char/tpm/eventlog/efi.c
..
..
@@ -1,14 +1,9 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * Copyright (C) 2017 Google
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  *
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  * Authors:
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  *      Thiebaud Weksteen <tweek@google.com>
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License
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- * as published by the Free Software Foundation; either version
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- * 2 of the License, or (at your option) any later version.
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- *
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  */
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8
 
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 #include <linux/efi.h>
..
..
@@ -21,10 +16,14 @@
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 int tpm_read_log_efi(struct tpm_chip *chip)
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 {
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18
 
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+	struct efi_tcg2_final_events_table *final_tbl = NULL;
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+	int final_events_log_size = efi_tpm_final_log_size;
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 	struct linux_efi_tpm_eventlog *log_tbl;
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 	struct tpm_bios_log *log;
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 	u32 log_size;
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 	u8 tpm_log_version;
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+	void *tmp;
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+	int ret;
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27
 
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 	if (!(chip->flags & TPM_CHIP_FLAG_TPM2))
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 		return -ENODEV;
..
..
@@ -57,15 +56,69 @@
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56
 
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 	/* malloc EventLog space */
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 	log->bios_event_log = kmemdup(log_tbl->log, log_size, GFP_KERNEL);
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-	if (!log->bios_event_log)
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-		goto err_memunmap;
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+	if (!log->bios_event_log) {
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+		ret = -ENOMEM;
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+		goto out;
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+	}
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+
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 	log->bios_event_log_end = log->bios_event_log + log_size;
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-
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 	tpm_log_version = log_tbl->version;
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-	memunmap(log_tbl);
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-	return tpm_log_version;
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66
 
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-err_memunmap:
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+	ret = tpm_log_version;
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+
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+	if (efi.tpm_final_log == EFI_INVALID_TABLE_ADDR ||
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+	    final_events_log_size == 0 ||
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+	    tpm_log_version != EFI_TCG2_EVENT_LOG_FORMAT_TCG_2)
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+		goto out;
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+
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+	final_tbl = memremap(efi.tpm_final_log,
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+			     sizeof(*final_tbl) + final_events_log_size,
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+			     MEMREMAP_WB);
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+	if (!final_tbl) {
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+		pr_err("Could not map UEFI TPM final log\n");
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+		kfree(log->bios_event_log);
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+		ret = -ENOMEM;
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+		goto out;
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+	}
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+
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+	/*
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+	 * The 'final events log' size excludes the 'final events preboot log'
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+	 * at its beginning.
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+	 */
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+	final_events_log_size -= log_tbl->final_events_preboot_size;
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+
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+	/*
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+	 * Allocate memory for the 'combined log' where we will append the
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+	 * 'final events log' to.
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+	 */
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+	tmp = krealloc(log->bios_event_log,
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+		       log_size + final_events_log_size,
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+		       GFP_KERNEL);
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+	if (!tmp) {
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+		kfree(log->bios_event_log);
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+		ret = -ENOMEM;
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+		goto out;
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+	}
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+
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+	log->bios_event_log = tmp;
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+
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+	/*
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+	 * Append any of the 'final events log' that didn't also end up in the
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+	 * 'main log'. Events can be logged in both if events are generated
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+	 * between GetEventLog() and ExitBootServices().
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+	 */
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+	memcpy((void *)log->bios_event_log + log_size,
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+	       final_tbl->events + log_tbl->final_events_preboot_size,
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+	       final_events_log_size);
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+	/*
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+	 * The size of the 'combined log' is the size of the 'main log' plus
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+	 * the size of the 'final events log'.
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+	 */
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+	log->bios_event_log_end = log->bios_event_log +
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+		log_size + final_events_log_size;
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+
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+out:
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+	memunmap(final_tbl);
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 	memunmap(log_tbl);
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-	return -ENOMEM;
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+	return ret;
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 }