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perf/arch/sh: Implement hw_breakpoint_arch_parse() 

Migrate to the new API in order to remove arch_validate_hwbkpt_settings()
that clumsily mixes up architecture validation and commit

Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Joel Fernandes <joel.opensrc@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rich Felker <dalias@libc.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: http://lkml.kernel.org/r/1529981939-8231-9-git-send-email-frederic@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Frederic Weisbecker 2018-06-26 04:58:55 +02:00 committed by Ingo Molnar
parent 9234428957
commit 551624d6fc
2 changed files with 24 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
arch/sh/include/asm/hw_breakpoint.h
View File

@ -40,6 +40,7 @@ struct sh_ubc {
struct clk *clk; /* optional interface clock / MSTP bit */
};
struct perf_event_attr;
struct perf_event;
struct task_struct;
struct pmu;
@ -54,7 +55,10 @@ static inline int hw_breakpoint_slots(int type)
/* arch/sh/kernel/hw_breakpoint.c */
extern int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw);
extern int arch_validate_hwbkpt_settings(struct perf_event *bp);
extern int hw_breakpoint_arch_parse(struct perf_event *bp,
const struct perf_event_attr *attr,
struct arch_hw_breakpoint *hw);
#define hw_breakpoint_arch_parse hw_breakpoint_arch_parse
extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
unsigned long val, void *data);

37
arch/sh/kernel/hw_breakpoint.c
View File

@ -173,40 +173,40 @@ int arch_bp_generic_fields(int sh_len, int sh_type,
return 0;
}
static int arch_build_bp_info(struct perf_event *bp)
static int arch_build_bp_info(struct perf_event *bp,
const struct perf_event_attr *attr,
struct arch_hw_breakpoint *hw)
{
struct arch_hw_breakpoint *info = counter_arch_bp(bp);
info->address = bp->attr.bp_addr;
hw->address = attr->bp_addr;
/* Len */
switch (bp->attr.bp_len) {
switch (attr->bp_len) {
case HW_BREAKPOINT_LEN_1:
info->len = SH_BREAKPOINT_LEN_1;
hw->len = SH_BREAKPOINT_LEN_1;
break;
case HW_BREAKPOINT_LEN_2:
info->len = SH_BREAKPOINT_LEN_2;
hw->len = SH_BREAKPOINT_LEN_2;
break;
case HW_BREAKPOINT_LEN_4:
info->len = SH_BREAKPOINT_LEN_4;
hw->len = SH_BREAKPOINT_LEN_4;
break;
case HW_BREAKPOINT_LEN_8:
info->len = SH_BREAKPOINT_LEN_8;
hw->len = SH_BREAKPOINT_LEN_8;
break;
default:
return -EINVAL;
}
/* Type */
switch (bp->attr.bp_type) {
switch (attr->bp_type) {
case HW_BREAKPOINT_R:
info->type = SH_BREAKPOINT_READ;
hw->type = SH_BREAKPOINT_READ;
break;
case HW_BREAKPOINT_W:
info->type = SH_BREAKPOINT_WRITE;
hw->type = SH_BREAKPOINT_WRITE;
break;
case HW_BREAKPOINT_W | HW_BREAKPOINT_R:
info->type = SH_BREAKPOINT_RW;
hw->type = SH_BREAKPOINT_RW;
break;
default:
return -EINVAL;
@ -218,19 +218,20 @@ static int arch_build_bp_info(struct perf_event *bp)
/*
* Validate the arch-specific HW Breakpoint register settings
*/
int arch_validate_hwbkpt_settings(struct perf_event *bp)
int hw_breakpoint_arch_parse(struct perf_event *bp,
const struct perf_event_attr *attr,
struct arch_hw_breakpoint *hw)
{
struct arch_hw_breakpoint *info = counter_arch_bp(bp);
unsigned int align;
int ret;
ret = arch_build_bp_info(bp);
ret = arch_build_bp_info(bp, attr, hw);
if (ret)
return ret;
ret = -EINVAL;
switch (info->len) {
switch (hw->len) {
case SH_BREAKPOINT_LEN_1:
align = 0;
break;
@ -251,7 +252,7 @@ int arch_validate_hwbkpt_settings(struct perf_event *bp)
* Check that the low-order bits of the address are appropriate
* for the alignment implied by len.
*/
if (info->address & align)
if (hw->address & align)
return -EINVAL;
return 0;