764cedc563
In preparation for FORTIFY_SOURCE performing compile-time and run-time field bounds checking for memcpy(), avoid intentionally writing across neighboring fields. Use struct_group() in struct art around members weight, and ac[0-9]_max, so they can be referenced together. This will allow memcpy() and sizeof() to more easily reason about sizes, improve readability, and avoid future warnings about writing beyond the end of weight. "pahole" shows no size nor member offset changes to struct art. "objdump -d" shows no meaningful object code changes (i.e. only source line number induced differences). Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
90 lines
2.0 KiB
C
90 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ACPI_ACPI_THERMAL_H
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#define __ACPI_ACPI_THERMAL_H
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#include <asm/ioctl.h>
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#define ACPI_THERMAL_MAGIC 's'
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#define ACPI_THERMAL_GET_TRT_LEN _IOR(ACPI_THERMAL_MAGIC, 1, unsigned long)
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#define ACPI_THERMAL_GET_ART_LEN _IOR(ACPI_THERMAL_MAGIC, 2, unsigned long)
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#define ACPI_THERMAL_GET_TRT_COUNT _IOR(ACPI_THERMAL_MAGIC, 3, unsigned long)
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#define ACPI_THERMAL_GET_ART_COUNT _IOR(ACPI_THERMAL_MAGIC, 4, unsigned long)
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#define ACPI_THERMAL_GET_TRT _IOR(ACPI_THERMAL_MAGIC, 5, unsigned long)
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#define ACPI_THERMAL_GET_ART _IOR(ACPI_THERMAL_MAGIC, 6, unsigned long)
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struct art {
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acpi_handle source;
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acpi_handle target;
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struct_group(data,
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u64 weight;
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u64 ac0_max;
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u64 ac1_max;
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u64 ac2_max;
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u64 ac3_max;
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u64 ac4_max;
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u64 ac5_max;
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u64 ac6_max;
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u64 ac7_max;
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u64 ac8_max;
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u64 ac9_max;
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);
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} __packed;
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struct trt {
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acpi_handle source;
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acpi_handle target;
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u64 influence;
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u64 sample_period;
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u64 reserved1;
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u64 reserved2;
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u64 reserved3;
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u64 reserved4;
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} __packed;
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#define ACPI_NR_ART_ELEMENTS 13
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/* for usrspace */
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union art_object {
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struct {
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char source_device[8]; /* ACPI single name */
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char target_device[8]; /* ACPI single name */
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struct_group(data,
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u64 weight;
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u64 ac0_max_level;
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u64 ac1_max_level;
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u64 ac2_max_level;
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u64 ac3_max_level;
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u64 ac4_max_level;
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u64 ac5_max_level;
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u64 ac6_max_level;
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u64 ac7_max_level;
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u64 ac8_max_level;
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u64 ac9_max_level;
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);
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};
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u64 __data[ACPI_NR_ART_ELEMENTS];
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};
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union trt_object {
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struct {
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char source_device[8]; /* ACPI single name */
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char target_device[8]; /* ACPI single name */
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u64 influence;
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u64 sample_period;
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u64 reserved[4];
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};
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u64 __data[8];
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};
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#ifdef __KERNEL__
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int acpi_thermal_rel_misc_device_add(acpi_handle handle);
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int acpi_thermal_rel_misc_device_remove(acpi_handle handle);
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int acpi_parse_art(acpi_handle handle, int *art_count, struct art **arts,
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bool create_dev);
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int acpi_parse_trt(acpi_handle handle, int *trt_count, struct trt **trts,
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bool create_dev);
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#endif
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#endif /* __ACPI_ACPI_THERMAL_H */
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