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| author | Andrey Zhizhikin <andrey.z@gmail.com> | 2020-08-11 07:21:50 +0000 |
|---|---|---|
| committer | Andrey Zhizhikin <andrey.z@gmail.com> | 2020-08-11 07:21:50 +0000 |
| commit | 6ae0a6e3c2e959d4b96c49e5d6aa475ed6932c43 (patch) | |
| tree | b35d197a144f4857ec29c2fd479721fd8d6677cb /arch/arm64/kernel | |
| parent | 188eac302f18174c537f3142e103f75bcf9d8a6d (diff) | |
| parent | 4e9688ad3d36e8f73c73e435f53da5ae1cd91a70 (diff) | |
Merge tag 'v5.4.49' into 5.4-2.1.x-imx
This is the 5.4.49 stable release
Conflicts (manual resolve, NXP version taken):
sound/soc/fsl/fsl_esai.c
Commit 53057bd4ac84f upstream addresses the problem of endless isr in
case if exception interrupt is enabled and tasklet is scheduled. Since
NXP implementation has tasklet removed with commit 2bbe95fe6c0dd,
upstream fix does not match the main implementation, hence we keep the
NXP version here.
Signed-off-by: Andrey Zhizhikin <andrey.z@gmail.com>
Diffstat (limited to 'arch/arm64/kernel')
| -rw-r--r-- | arch/arm64/kernel/hw_breakpoint.c | 44 |
1 files changed, 26 insertions, 18 deletions
diff --git a/arch/arm64/kernel/hw_breakpoint.c b/arch/arm64/kernel/hw_breakpoint.c index 38ee1514cd9c..b4a160795824 100644 --- a/arch/arm64/kernel/hw_breakpoint.c +++ b/arch/arm64/kernel/hw_breakpoint.c @@ -730,6 +730,27 @@ static u64 get_distance_from_watchpoint(unsigned long addr, u64 val, return 0; } +static int watchpoint_report(struct perf_event *wp, unsigned long addr, + struct pt_regs *regs) +{ + int step = is_default_overflow_handler(wp); + struct arch_hw_breakpoint *info = counter_arch_bp(wp); + + info->trigger = addr; + + /* + * If we triggered a user watchpoint from a uaccess routine, then + * handle the stepping ourselves since userspace really can't help + * us with this. + */ + if (!user_mode(regs) && info->ctrl.privilege == AARCH64_BREAKPOINT_EL0) + step = 1; + else + perf_bp_event(wp, regs); + + return step; +} + static int watchpoint_handler(unsigned long addr, unsigned int esr, struct pt_regs *regs) { @@ -739,7 +760,6 @@ static int watchpoint_handler(unsigned long addr, unsigned int esr, u64 val; struct perf_event *wp, **slots; struct debug_info *debug_info; - struct arch_hw_breakpoint *info; struct arch_hw_breakpoint_ctrl ctrl; slots = this_cpu_ptr(wp_on_reg); @@ -777,25 +797,13 @@ static int watchpoint_handler(unsigned long addr, unsigned int esr, if (dist != 0) continue; - info = counter_arch_bp(wp); - info->trigger = addr; - perf_bp_event(wp, regs); - - /* Do we need to handle the stepping? */ - if (is_default_overflow_handler(wp)) - step = 1; + step = watchpoint_report(wp, addr, regs); } - if (min_dist > 0 && min_dist != -1) { - /* No exact match found. */ - wp = slots[closest_match]; - info = counter_arch_bp(wp); - info->trigger = addr; - perf_bp_event(wp, regs); - /* Do we need to handle the stepping? */ - if (is_default_overflow_handler(wp)) - step = 1; - } + /* No exact match found? */ + if (min_dist > 0 && min_dist != -1) + step = watchpoint_report(slots[closest_match], addr, regs); + rcu_read_unlock(); if (!step) |