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>

diff --git a/arch/sh/include/asm/hw_breakpoint.h b/arch/sh/include/asm/hw_breakpoint.h
index dae622d..867edcc 100644 (file)
--- a/arch/sh/include/asm/hw_breakpoint.h
+++ b/arch/sh/include/asm/hw_breakpoint.h
@@ -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);
 

diff --git a/arch/sh/kernel/hw_breakpoint.c b/arch/sh/kernel/hw_breakpoint.c
index c453a0c..d9ff3b4 100644 (file)
--- a/arch/sh/kernel/hw_breakpoint.c
+++ b/arch/sh/kernel/hw_breakpoint.c
@@ -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;