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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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Magnus Lindholm
a182df7cea
The ES40 Service Guide, Table D-19, documents a correctable frame with its system area at 0x58 and total size 0x80. The existing EV6 decoder interprets system words as extended CPU registers and reads past its end. This establishes the layout for ES40; whether Titan and Nautilus PALcode also emits this short frame has not been verified. Validate the processor area before decoding it and only print extended registers when present. Preserve rejected frames with a raw dump rather than trusting their invalid offsets. Cap the dump at 1 KiB and round down to complete quadwords. This still relies on firmware supplying an accessible frame of its advertised size; the cap is not pointer validation. Signed-off-by: Magnus Lindholm <linmag7@gmail.com> Reviewed-by: Matt Turner <mattst88@gmail.com> Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
90 lines
2.7 KiB
C
90 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* linux/arch/alpha/kernel/err_impl.h
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*
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* Copyright (C) 2000 Jeff Wiedemeier (Compaq Computer Corporation)
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*
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* Contains declarations and macros to support Alpha error handling
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* implementations.
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*/
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#include <asm/mce.h>
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union el_timestamp;
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struct el_subpacket;
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struct ev7_lf_subpackets;
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struct el_subpacket_annotation {
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struct el_subpacket_annotation *next;
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u16 class;
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u16 type;
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u16 revision;
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char *description;
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char **annotation;
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};
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#define SUBPACKET_ANNOTATION(c, t, r, d, a) {NULL, (c), (t), (r), (d), (a)}
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struct el_subpacket_handler {
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struct el_subpacket_handler *next;
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u16 class;
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struct el_subpacket *(*handler)(struct el_subpacket *);
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};
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#define SUBPACKET_HANDLER_INIT(c, h) {NULL, (c), (h)}
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/*
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* Manipulate a field from a register given it's name. defines
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* for the LSB (__S - shift count) and bitmask (__M) are required
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*
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* EXTRACT(u, f) - extracts the field and places it at bit position 0
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* GEN_MASK(f) - creates an in-position mask for the field
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*/
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#define EXTRACT(u, f) (((u) >> f##__S) & f##__M)
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#define GEN_MASK(f) ((u64)f##__M << f##__S)
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/*
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* err_common.c
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*/
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extern char *err_print_prefix;
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extern void mchk_dump_mem(void *, size_t, char **);
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extern void mchk_dump_logout_frame_raw(struct el_common *header);
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extern void mchk_dump_logout_frame(struct el_common *);
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extern void el_print_timestamp(union el_timestamp *);
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extern void el_process_subpackets(struct el_subpacket *, int);
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extern struct el_subpacket *el_process_subpacket(struct el_subpacket *);
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extern void el_annotate_subpacket(struct el_subpacket *);
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extern void cdl_check_console_data_log(void);
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extern int cdl_register_subpacket_annotation(struct el_subpacket_annotation *);
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extern int cdl_register_subpacket_handler(struct el_subpacket_handler *);
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/*
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* err_ev7.c
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*/
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extern struct ev7_lf_subpackets *
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ev7_collect_logout_frame_subpackets(struct el_subpacket *,
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struct ev7_lf_subpackets *);
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extern void ev7_register_error_handlers(void);
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extern void ev7_machine_check(unsigned long, unsigned long);
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/*
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* err_ev6.c
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*/
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extern void ev6_register_error_handlers(void);
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extern int ev6_process_logout_frame(struct el_common *, int);
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extern void ev6_machine_check(unsigned long, unsigned long);
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/*
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* err_marvel.c
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*/
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extern void marvel_machine_check(unsigned long, unsigned long);
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extern void marvel_register_error_handlers(void);
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/*
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* err_titan.c
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*/
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extern int titan_process_logout_frame(struct el_common *, int);
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extern void titan_machine_check(unsigned long, unsigned long);
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extern void titan_register_error_handlers(void);
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extern int privateer_process_logout_frame(struct el_common *, int);
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extern void privateer_machine_check(unsigned long, unsigned long);
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