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| author | Chris Metcalf <cmetcalf@ezchip.com> | 2015-03-23 21:23:58 +0300 |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@ezchip.com> | 2015-04-17 21:01:10 +0300 |
| commit | 49e4e15619cd7cd9fc275d460fae2a95c1337fcc (patch) | |
| tree | 700e24bb8f72a7662e7d4ae26d847e908d08de92 /arch/tile/kernel/single_step.c | |
| parent | b340c656af6317e28b466996a72cca019d97b42d (diff) | |
| download | linux-49e4e15619cd7cd9fc275d460fae2a95c1337fcc.tar.xz | |
tile: support CONTEXT_TRACKING and thus NOHZ_FULL
Add the TIF_NOHZ flag appropriately.
Add call to user_exit() on entry to do_work_pending() and on entry
to syscalls via do_syscall_trace_enter(), and also the top of
do_syscall_trace_exit() just because it's done in x86.
Add call to user_enter() at the bottom of do_work_pending() once we
have no more work to do before returning to userspace.
Wrap all the trap code in exception_enter() / exception_exit().
Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Diffstat (limited to 'arch/tile/kernel/single_step.c')
| -rw-r--r-- | arch/tile/kernel/single_step.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/tile/kernel/single_step.c b/arch/tile/kernel/single_step.c index 862973074bf9..53f7b9def07b 100644 --- a/arch/tile/kernel/single_step.c +++ b/arch/tile/kernel/single_step.c @@ -23,6 +23,7 @@ #include <linux/types.h> #include <linux/err.h> #include <linux/prctl.h> +#include <linux/context_tracking.h> #include <asm/cacheflush.h> #include <asm/traps.h> #include <asm/uaccess.h> @@ -738,6 +739,7 @@ static DEFINE_PER_CPU(unsigned long, ss_saved_pc); void gx_singlestep_handle(struct pt_regs *regs, int fault_num) { + enum ctx_state prev_state = exception_enter(); unsigned long *ss_pc = this_cpu_ptr(&ss_saved_pc); struct thread_info *info = (void *)current_thread_info(); int is_single_step = test_ti_thread_flag(info, TIF_SINGLESTEP); @@ -754,6 +756,7 @@ void gx_singlestep_handle(struct pt_regs *regs, int fault_num) __insn_mtspr(SPR_SINGLE_STEP_CONTROL_K, control); send_sigtrap(current, regs); } + exception_exit(prev_state); } |