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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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ceb1813224
Currently one requires to test four kernel configurations to test the firmware API completely: 0) CONFIG_FW_LOADER=y 1) o CONFIG_FW_LOADER=y o CONFIG_FW_LOADER_USER_HELPER=y 2) o CONFIG_FW_LOADER=y o CONFIG_FW_LOADER_USER_HELPER=y o CONFIG_FW_LOADER_USER_HELPER_FALLBACK=y 3) When CONFIG_FW_LOADER=m the built-in stuff is disabled, we have no current tests for this. We can reduce the requirements to three kernel configurations by making fw_config.force_sysfs_fallback a proc knob we flip on off. For kernels that disable CONFIG_IKCONFIG_PROC this can also enable one to inspect if CONFIG_FW_LOADER_USER_HELPER_FALLBACK was enabled at build time by checking the proc value at boot time. Acked-by: Kees Cook <keescook@chromium.org> Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
47 lines
1022 B
C
47 lines
1022 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/types.h>
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#include <linux/kconfig.h>
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#include <linux/list.h>
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#include <linux/slab.h>
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#include <linux/security.h>
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#include <linux/highmem.h>
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#include <linux/umh.h>
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#include <linux/sysctl.h>
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#include "fallback.h"
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#include "firmware.h"
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/*
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* firmware fallback configuration table
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*/
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/* Module or buit-in */
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#ifdef CONFIG_FW_LOADER_USER_HELPER
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static unsigned int zero;
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static unsigned int one = 1;
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struct firmware_fallback_config fw_fallback_config = {
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.force_sysfs_fallback = IS_ENABLED(CONFIG_FW_LOADER_USER_HELPER_FALLBACK),
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.loading_timeout = 60,
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.old_timeout = 60,
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};
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EXPORT_SYMBOL_GPL(fw_fallback_config);
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struct ctl_table firmware_config_table[] = {
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{
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.procname = "force_sysfs_fallback",
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.data = &fw_fallback_config.force_sysfs_fallback,
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.maxlen = sizeof(unsigned int),
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.mode = 0644,
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.proc_handler = proc_douintvec_minmax,
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.extra1 = &zero,
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.extra2 = &one,
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},
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{ }
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};
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EXPORT_SYMBOL_GPL(firmware_config_table);
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#endif
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