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Updates in the format described in section 9.11 of the Intel SDM can now be applied as one of the first steps in booting the kernel. Updates that are loaded this way are automatically re-applied upon exit from ACPI sleep states, in contrast with the existing cpucontrol(8)-based method. For the time being only Intel updates are supported. Microcode update files are passed to the kernel via loader(8). The file type must be "cpu_microcode" in order for the file to be recognized as a candidate microcode update. Updates for multiple CPU types may be concatenated together into a single file, in which case the kernel will select and apply a matching update. Memory used to store the update file will be freed back to the system once the update is applied, so this approach will not consume more memory than required. Reviewed by: kib MFC after: 6 weeks Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D16370
67 lines
2.3 KiB
C
67 lines
2.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2018 The FreeBSD Foundation
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*
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* This software was developed by Mark Johnston under sponsorship from
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* the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_UCODE_H_
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#define _MACHINE_UCODE_H_
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struct ucode_intel_header {
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uint32_t header_version;
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int32_t update_revision;
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uint32_t dat;
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uint32_t processor_signature;
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uint32_t checksum;
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uint32_t loader_revision;
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uint32_t processor_flags;
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#define UCODE_INTEL_DEFAULT_DATA_SIZE 2000
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uint32_t data_size;
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uint32_t total_size;
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uint32_t reserved[3];
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};
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struct ucode_intel_extsig_table {
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uint32_t signature_count;
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uint32_t signature_table_checksum;
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uint32_t reserved[3];
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struct ucode_intel_extsig {
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uint32_t processor_signature;
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uint32_t processor_flags;
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uint32_t checksum;
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} entries[0];
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};
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int ucode_intel_load(void *data, bool unsafe);
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size_t ucode_load_bsp(uintptr_t free);
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void ucode_load_ap(int cpu);
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void ucode_reload(void);
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void * ucode_update(void *data);
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#endif /* _MACHINE_UCODE_H_ */
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