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firmware: arm_sdei: Prohibit probing in '_sdei_handler' 

Functions called in '_sdei_handler' are needed to be marked as
'nokprobe'. Because these functions are called in NMI context and
neither the arch-code's debug infrastructure nor kprobes core supports
this.

Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Reviewed-by: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Xiongfeng Wang 2019-04-26 10:16:36 +08:00 committed by Will Deacon
parent f08cae2f28
commit 2f1d4e24d9
1 changed files with 3 additions and 0 deletions
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3
drivers/firmware/arm_sdei.c
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@ -165,6 +165,7 @@ static int invoke_sdei_fn(unsigned long function_id, unsigned long arg0,
return err; return err;
} }
NOKPROBE_SYMBOL(invoke_sdei_fn);
static struct sdei_event *sdei_event_find(u32 event_num) static struct sdei_event *sdei_event_find(u32 event_num)
{ {
@ -879,6 +880,7 @@ static void sdei_smccc_smc(unsigned long function_id,
{ {
arm_smccc_smc(function_id, arg0, arg1, arg2, arg3, arg4, 0, 0, res); arm_smccc_smc(function_id, arg0, arg1, arg2, arg3, arg4, 0, 0, res);
} }
NOKPROBE_SYMBOL(sdei_smccc_smc);
static void sdei_smccc_hvc(unsigned long function_id, static void sdei_smccc_hvc(unsigned long function_id,
unsigned long arg0, unsigned long arg1, unsigned long arg0, unsigned long arg1,
@ -887,6 +889,7 @@ static void sdei_smccc_hvc(unsigned long function_id,
{ {
arm_smccc_hvc(function_id, arg0, arg1, arg2, arg3, arg4, 0, 0, res); arm_smccc_hvc(function_id, arg0, arg1, arg2, arg3, arg4, 0, 0, res);
} }
NOKPROBE_SYMBOL(sdei_smccc_hvc);
int sdei_register_ghes(struct ghes *ghes, sdei_event_callback *normal_cb, int sdei_register_ghes(struct ghes *ghes, sdei_event_callback *normal_cb,
sdei_event_callback *critical_cb) sdei_event_callback *critical_cb)