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b72ae900d4
The way we got the kernel metadata pointer was by calling preload_search_by_type with one of the following three: "elf kernel", "elf32 kernel" and "elf64 kernel". Which one(s) we used wasn't consistent though. Sometimes we would only try "elf kernel", and other times we would try one of the latter two if the first failed. However, the loader only ever sets "elf kernel" as the kernel type. Now, the kmdp is a global, preload_kmdp, and it's initialized using preload_initkmdp in machdep.c (or machdep_boot.c on arm/64). preload_initkmdp takes a single boolean argument that tells us whether not finding the kmdp is fatal or not. Reviewed by: imp, kib Pull Request: https://github.com/freebsd/freebsd-src/pull/1394
68 lines
2.1 KiB
C
68 lines
2.1 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2021 Vladimir Kondratyev <wulf@FreeBSD.org>
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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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*
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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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _LINUXKPI_LINUX_EFI_H_
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#define _LINUXKPI_LINUX_EFI_H_
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <sys/linker.h>
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#include <sys/systm.h>
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#include <machine/md_var.h>
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#include <machine/metadata.h>
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#define EFI_BOOT 0
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static inline bool
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__efi_enabled(int feature)
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{
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bool enabled = false;
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switch (feature) {
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case EFI_BOOT:
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#ifdef __amd64__
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/* Use cached value on amd64 */
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enabled = efi_boot;
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#elif defined(MODINFOMD_EFI_MAP)
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enabled = preload_search_info(preload_kmdp,
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MODINFO_METADATA | MODINFOMD_EFI_MAP) != NULL;
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#endif
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break;
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default:
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break;
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}
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return (enabled);
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}
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#define efi_enabled(x) ({ \
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_Static_assert((x) == EFI_BOOT, "unsupported feature"); \
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__efi_enabled(x); \
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})
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#endif /* _LINUXKPI_LINUX_EFI_H_ */
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