Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
IronPort-SDR: EMjnzsXmWfnN3naYcEFsUxeV74Yh5Gk+jAslhuPpvDQVACUCfrIIycBZUYwAxrYBmZuc5nWgLc
 CkAu8rfTM5Jw==
IronPort-SDR: m7jxQrHW3vI2vckkzyo4Q+tVf4h5Gl2uodbMnhG29Pvll9O7TeS0K+ktfGlJ3wyjaOLmh6tXnY
 bQpZgN3q+n5A==
From:   kan.liang@linux.intel.com
To:     peterz@infradead.org, acme@redhat.com, mingo@kernel.org,
        linux-kernel@vger.kernel.org
Cc:     jolsa@kernel.org, eranian@google.com,
        alexander.shishkin@linux.intel.com, ak@linux.intel.com,
        like.xu@linux.intel.com, Kan Liang <kan.liang@linux.intel.com>
Subject: [PATCH V7 02/14] perf/x86/intel: Name the global status bit in NMI handler
Date:   Thu, 23 Jul 2020 10:11:05 -0700
Message-Id: <20200723171117.9918-3-kan.liang@linux.intel.com>
In-Reply-To: <20200723171117.9918-1-kan.liang@linux.intel.com>
References: <20200723171117.9918-1-kan.liang@linux.intel.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

From: Kan Liang <kan.liang@linux.intel.com>

Magic numbers are used in the current NMI handler for the global status
bit. Use a meaningful name to replace the magic numbers to improve the
readability of the code.

Remove a Tab for all GLOBAL_STATUS_* and INTEL_PMC_IDX_FIXED_BTS macros
to reduce the length of the line.

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
---
 arch/x86/events/intel/core.c      |  4 ++--
 arch/x86/include/asm/perf_event.h | 22 ++++++++++++----------
 2 files changed, 14 insertions(+), 12 deletions(-)

diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 50963472ee85..ac1408fe1aee 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -2389,7 +2389,7 @@ static int handle_pmi_common(struct pt_regs *regs, u64 status)
 	/*
 	 * PEBS overflow sets bit 62 in the global status register
 	 */
-	if (__test_and_clear_bit(62, (unsigned long *)&status)) {
+	if (__test_and_clear_bit(GLOBAL_STATUS_BUFFER_OVF_BIT, (unsigned long *)&status)) {
 		u64 pebs_enabled = cpuc->pebs_enabled;
 
 		handled++;
@@ -2410,7 +2410,7 @@ static int handle_pmi_common(struct pt_regs *regs, u64 status)
 	/*
 	 * Intel PT
 	 */
-	if (__test_and_clear_bit(55, (unsigned long *)&status)) {
+	if (__test_and_clear_bit(GLOBAL_STATUS_TRACE_TOPAPMI_BIT, (unsigned long *)&status)) {
 		handled++;
 		if (unlikely(perf_guest_cbs && perf_guest_cbs->is_in_guest() &&
 			perf_guest_cbs->handle_intel_pt_intr))
diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h
index 0c1b13720525..fd3eba65337f 100644
--- a/arch/x86/include/asm/perf_event.h
+++ b/arch/x86/include/asm/perf_event.h
@@ -225,16 +225,18 @@ struct x86_pmu_capability {
  * values are used by actual fixed events and higher values are used
  * to indicate other overflow conditions in the PERF_GLOBAL_STATUS msr.
  */
-#define INTEL_PMC_IDX_FIXED_BTS				(INTEL_PMC_IDX_FIXED + 16)
-
-#define GLOBAL_STATUS_COND_CHG				BIT_ULL(63)
-#define GLOBAL_STATUS_BUFFER_OVF			BIT_ULL(62)
-#define GLOBAL_STATUS_UNC_OVF				BIT_ULL(61)
-#define GLOBAL_STATUS_ASIF				BIT_ULL(60)
-#define GLOBAL_STATUS_COUNTERS_FROZEN			BIT_ULL(59)
-#define GLOBAL_STATUS_LBRS_FROZEN_BIT			58
-#define GLOBAL_STATUS_LBRS_FROZEN			BIT_ULL(GLOBAL_STATUS_LBRS_FROZEN_BIT)
-#define GLOBAL_STATUS_TRACE_TOPAPMI			BIT_ULL(55)
+#define INTEL_PMC_IDX_FIXED_BTS			(INTEL_PMC_IDX_FIXED + 16)
+
+#define GLOBAL_STATUS_COND_CHG			BIT_ULL(63)
+#define GLOBAL_STATUS_BUFFER_OVF_BIT		62
+#define GLOBAL_STATUS_BUFFER_OVF		BIT_ULL(GLOBAL_STATUS_BUFFER_OVF_BIT)
+#define GLOBAL_STATUS_UNC_OVF			BIT_ULL(61)
+#define GLOBAL_STATUS_ASIF			BIT_ULL(60)
+#define GLOBAL_STATUS_COUNTERS_FROZEN		BIT_ULL(59)
+#define GLOBAL_STATUS_LBRS_FROZEN_BIT		58
+#define GLOBAL_STATUS_LBRS_FROZEN		BIT_ULL(GLOBAL_STATUS_LBRS_FROZEN_BIT)
+#define GLOBAL_STATUS_TRACE_TOPAPMI_BIT		55
+#define GLOBAL_STATUS_TRACE_TOPAPMI		BIT_ULL(GLOBAL_STATUS_TRACE_TOPAPMI_BIT)
 
 /*
  * We model guest LBR event tracing as another fixed-mode PMC like BTS.
-- 
2.17.1