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ANDROID: arm64: add vendor hooks for unusal abort cases

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Add hooks to gather data of unsual aborts and summarize it with
other information.

Bug: 177483057

Signed-off-by: Sangmoon Kim <sangmoon.kim@samsung.com>
Change-Id: I5f44b12770ae4976a6e3b098bd95a05dea347764
This commit is contained in:
Sangmoon Kim
2021-01-19 21:24:58 +09:00
committed by Todd Kjos
parent 5f1e1f42a5
commit 9108e9ba66
3 changed files with 42 additions and 0 deletions
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6
arch/arm64/kernel/traps.c
View File

@@ -46,6 +46,8 @@
#include <asm/system_misc.h>
#include <asm/sysreg.h>
#include <trace/hooks/traps.h>
static const char *handler[]= {
"Synchronous Abort",
"IRQ",
@@ -404,6 +406,7 @@ void do_undefinstr(struct pt_regs *regs)
if (call_undef_hook(regs) == 0)
return;
trace_android_rvh_do_undefinstr(regs, user_mode(regs));
BUG_ON(!user_mode(regs));
force_signal_inject(SIGILL, ILL_ILLOPC, regs->pc, 0);
}
@@ -765,6 +768,7 @@ asmlinkage void notrace bad_mode(struct pt_regs *regs, int reason, unsigned int
handler[reason], smp_processor_id(), esr,
esr_get_class_string(esr));
trace_android_rvh_bad_mode(regs, esr, reason);
__show_regs(regs);
local_daif_mask();
panic("bad mode");
@@ -830,6 +834,8 @@ void __noreturn arm64_serror_panic(struct pt_regs *regs, u32 esr)
pr_crit("SError Interrupt on CPU%d, code 0x%08x -- %s\n",
smp_processor_id(), esr, esr_get_class_string(esr));
trace_android_rvh_arm64_serror_panic(regs, esr);
if (regs)
__show_regs(regs);

4
drivers/android/vendor_hooks.c
View File

@@ -40,6 +40,7 @@
#include <trace/hooks/ufshcd.h>
#include <trace/hooks/cgroup.h>
#include <trace/hooks/sys.h>
#include <trace/hooks/traps.h>
/*
* Export tracepoints that act as a bare tracehook (ie: have no trace event
@@ -179,3 +180,6 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_syscall_prctl_finished);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_alter_mutex_list_add);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_mutex_unlock_slowpath);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_rwsem_wake_finish);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_do_undefinstr);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_bad_mode);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_arm64_serror_panic);

32
include/trace/hooks/traps.h Normal file
View File

@@ -0,0 +1,32 @@
/* SPDX-License-Identifier: GPL-2.0 */
#undef TRACE_SYSTEM
#define TRACE_SYSTEM traps
#define TRACE_INCLUDE_PATH trace/hooks
#if !defined(_TRACE_HOOK_TRAPS_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_HOOK_TRAPS_H
#include <linux/tracepoint.h>
#include <trace/hooks/vendor_hooks.h>
/*
* Following tracepoints are not exported in tracefs and provide a
* mechanism for vendor modules to hook and extend functionality
*/
struct pt_regs;
DECLARE_RESTRICTED_HOOK(android_rvh_do_undefinstr,
TP_PROTO(struct pt_regs *regs, bool user),
TP_ARGS(regs, user),
TP_CONDITION(!user));
DECLARE_RESTRICTED_HOOK(android_rvh_bad_mode,
TP_PROTO(struct pt_regs *regs, unsigned int esr, int reason),
TP_ARGS(regs, reason, esr), 1);
DECLARE_RESTRICTED_HOOK(android_rvh_arm64_serror_panic,
TP_PROTO(struct pt_regs *regs, unsigned int esr),
TP_ARGS(regs, esr), 1);
/* macro versions of hooks are no longer required */
#endif /* _TRACE_HOOK_TRAPS_H */
/* This part must be outside protection */
#include <trace/define_trace.h>