[PATCH 2/4] perf/amd/uncore: Allow F17h user threadmask and slicemask specification

[Kim Phillips]

Continue to fully populate either one of threadmask or slicemask if the
user doesn't.

Signed-off-by: Kim Phillips <kim.phill...@amd.com>
Cc: Alexander Shishkin <alexander.shish...@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <a...@kernel.org>
Cc: Borislav Petkov <b...@alien8.de>
Cc: "H. Peter Anvin" <h...@zytor.com>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: Jiri Olsa <jo...@redhat.com>
Cc: Mark Rutland <mark.rutl...@arm.com>
Cc: Michael Petlan <mpet...@redhat.com>
Cc: Namhyung Kim <namhy...@kernel.org>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Stephane Eranian <eran...@google.com>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: x...@kernel.org
Cc: linux-kernel@vger.kernel.org
---
 arch/x86/events/amd/uncore.c | 23 ++++++++++++++++-------
 1 file changed, 16 insertions(+), 7 deletions(-)

diff --git a/arch/x86/events/amd/uncore.c b/arch/x86/events/amd/uncore.c
index 15c7982b1c58..1e35c934fe7c 100644
--- a/arch/x86/events/amd/uncore.c
+++ b/arch/x86/events/amd/uncore.c
@@ -181,13 +181,14 @@ static void amd_uncore_del(struct perf_event *event, int 
flags)
 }
 
 /*
- * Return a full thread and slice mask until per-CPU is
- * properly supported.
+ * Return a full thread and slice mask unless user
+ * has provided them
  */
-static u64 l3_thread_slice_mask(void)
+static u64 l3_thread_slice_mask(u64 config)
 {
        if (boot_cpu_data.x86 <= 0x18)
-               return AMD64_L3_SLICE_MASK | AMD64_L3_THREAD_MASK;
+               return ((config & AMD64_L3_SLICE_MASK) ? : AMD64_L3_SLICE_MASK) 
|
+                      ((config & AMD64_L3_THREAD_MASK) ? : 
AMD64_L3_THREAD_MASK);
 
        return AMD64_L3_EN_ALL_SLICES | AMD64_L3_EN_ALL_CORES |
               AMD64_L3_F19H_THREAD_MASK;
@@ -220,7 +221,7 @@ static int amd_uncore_event_init(struct perf_event *event)
         * For other events, the two fields do not affect the count.
         */
        if (l3_mask && is_llc_event(event))
-               hwc->config |= l3_thread_slice_mask();
+               hwc->config |= l3_thread_slice_mask(event->attr.config);
 
        uncore = event_to_amd_uncore(event);
        if (!uncore)
@@ -277,6 +278,8 @@ DEFINE_UNCORE_FORMAT_ATTR(event12,  event,          
"config:0-7,32-35");
 DEFINE_UNCORE_FORMAT_ATTR(event14,     event,          
"config:0-7,32-35,59-60"); /* F17h+ DF */
 DEFINE_UNCORE_FORMAT_ATTR(event8,      event,          "config:0-7");          
   /* F17h+ L3 */
 DEFINE_UNCORE_FORMAT_ATTR(umask,       umask,          "config:8-15");
+DEFINE_UNCORE_FORMAT_ATTR(slicemask,   slicemask,      "config:48-51");        
   /* F17h L3 */
+DEFINE_UNCORE_FORMAT_ATTR(threadmask8, threadmask,     "config:56-63");        
   /* F17h L3 */
 
 static struct attribute *amd_uncore_df_format_attr[] = {
        &format_attr_event12.attr, /* event14 if F17h+ */
@@ -287,6 +290,8 @@ static struct attribute *amd_uncore_df_format_attr[] = {
 static struct attribute *amd_uncore_l3_format_attr[] = {
        &format_attr_event12.attr, /* event8 if F17h+ */
        &format_attr_umask.attr,
+       NULL, /* slicemask if F17h */
+       NULL, /* threadmask8 if F17h */
        NULL,
 };
 
@@ -578,8 +583,12 @@ static int __init amd_uncore_init(void)
        }
 
        if (boot_cpu_has(X86_FEATURE_PERFCTR_LLC)) {
-               if (boot_cpu_data.x86 >= 0x17)
-                       *l3_attr = &format_attr_event8.attr;
+               if (boot_cpu_data.x86 >= 0x17) {
+                       *l3_attr++ = &format_attr_event8.attr;
+                       *l3_attr++ = &format_attr_umask.attr;
+                       *l3_attr++ = &format_attr_slicemask.attr;
+                       *l3_attr++ = &format_attr_threadmask8.attr;
+               }
 
                amd_uncore_llc = alloc_percpu(struct amd_uncore *);
                if (!amd_uncore_llc) {
-- 
2.27.0