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coresight: Doesn't save and restore ETMs state while CPU hot-plug

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Doesn't save and restore ETMs state while CPU being offline and
online hot-plug. Since ETM driver can save and restore ETMs state
in hot-plug process. If JTAG driver save and restore ETMs state
as well, there could be some conflicts with ETM driver.

Change-Id: Ib4de3c0e3d0abb4cb15946fc444e0c1fc9188fd1
Signed-off-by: Tao,Zhang <taozha@codeaurora.org>
This commit is contained in:
Tao,Zhang 2020-11-23 16:05:15 +08:00
commit dee26de962
2 changed files with 13 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

20
drivers/soc/qcom/jtagv8.c
View file

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2014-2019, The Linux Foundation. All rights reserved.
* Copyright (c) 2014-2020, The Linux Foundation. All rights reserved.
*
*/
@ -865,7 +865,7 @@ static void dbg_init_arch_data(void)
*
* In all cases we will run on the same cpu for the entire duration.
*/
void msm_jtag_save_state(void)
void msm_jtag_save_state(bool is_hotcpu_cb)
{
int cpu;
@ -875,13 +875,14 @@ void msm_jtag_save_state(void)
/* ensure counter is updated before moving forward */
mb();
msm_jtag_etm_save_state();
if (!is_hotcpu_cb)
msm_jtag_etm_save_state();
if (dbg.save_restore_enabled)
dbg_save_state(cpu);
}
EXPORT_SYMBOL(msm_jtag_save_state);
void msm_jtag_restore_state(void)
void msm_jtag_restore_state(bool is_hotcpu_cb)
{
int cpu;
@ -907,7 +908,8 @@ void msm_jtag_restore_state(void)
if (dbg.save_restore_enabled)
dbg_restore_state(cpu);
msm_jtag_etm_restore_state();
if (!is_hotcpu_cb)
msm_jtag_etm_restore_state();
}
EXPORT_SYMBOL(msm_jtag_restore_state);
@ -925,13 +927,13 @@ static inline bool dbg_arch_supported(uint8_t arch)
static int jtag_hotcpu_save_callback(unsigned int cpu)
{
msm_jtag_save_state();
msm_jtag_save_state(true);
return 0;
}
static int jtag_hotcpu_restore_callback(unsigned int cpu)
{
msm_jtag_restore_state();
msm_jtag_restore_state(true);
return 0;
}
@ -940,11 +942,11 @@ static int jtag_cpu_pm_callback(struct notifier_block *nfb,
{
switch (action) {
case CPU_PM_ENTER:
msm_jtag_save_state();
msm_jtag_save_state(false);
break;
case CPU_PM_ENTER_FAILED:
case CPU_PM_EXIT:
msm_jtag_restore_state();
msm_jtag_restore_state(false);
break;
}
return NOTIFY_OK;

4
include/soc/qcom/jtag.h
View file

@ -12,8 +12,8 @@ struct notifier_block;
#if defined(CONFIG_MSM_JTAG) || defined(CONFIG_MSM_JTAG_MM) || \
defined(CONFIG_MSM_JTAGV8)
extern void msm_jtag_save_state(void);
extern void msm_jtag_restore_state(void);
extern void msm_jtag_save_state(bool is_hotcpu_cb);
extern void msm_jtag_restore_state(bool is_hotcpu_cb);
extern void msm_jtag_etm_save_state(void);
extern void msm_jtag_etm_restore_state(void);
extern bool msm_jtag_fuse_apps_access_disabled(void);