linux-kernel - [PATCH v2 5/6] MIPS: perf: Fold vpe_id() macro into it's one last usage

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1523525786-29153-6-git-send-email-matt.redfearn@mips.com>
Date:   Thu, 12 Apr 2018 10:36:25 +0100
From:   Matt Redfearn <matt.redfearn@...s.com>
To:     James Hogan <jhogan@...nel.org>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Florian Fainelli <f.fainelli@...il.com>
CC:     <linux-mips@...ux-mips.org>,
        Matt Redfearn <matt.redfearn@...s.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...hat.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>
Subject: [PATCH v2 5/6] MIPS: perf: Fold vpe_id() macro into it's one last usage

The vpe_id() macro is now used only in mipsxx_pmu_enable_event when
CONFIG_CPU_BMIPS5000 is defined. Fold the one used definition of the
macro into it's usage and remove the now unused definitions.

Since we know that cpu_has_mipsmt_pertccounters == 0 on BMIPS5000,
remove the test on it and just set the counter to count the relevant
VPE.

Signed-off-by: Matt Redfearn <matt.redfearn@...s.com>

---

Changes in v2:
Since BMIPS5000 does not implement per TC counters, we can remove the
check on cpu_has_mipsmt_pertccounters.

 arch/mips/kernel/perf_event_mipsxx.c | 18 ++++--------------
 1 file changed, 4 insertions(+), 14 deletions(-)

diff --git a/arch/mips/kernel/perf_event_mipsxx.c b/arch/mips/kernel/perf_event_mipsxx.c
index 6c9b5d64a9ef..389e346e9cf3 100644
--- a/arch/mips/kernel/perf_event_mipsxx.c
+++ b/arch/mips/kernel/perf_event_mipsxx.c
@@ -134,18 +134,6 @@ static int cpu_has_mipsmt_pertccounters;
 static DEFINE_SPINLOCK(core_counters_lock);
 
 static DEFINE_RWLOCK(pmuint_rwlock);
-
-#if defined(CONFIG_CPU_BMIPS5000)
-#define vpe_id()	(cpu_has_mipsmt_pertccounters ? \
-			 0 : (smp_processor_id() & MIPS_CPUID_TO_COUNTER_MASK))
-#else
-#define vpe_id()	(cpu_has_mipsmt_pertccounters ? \
-			 0 : cpu_vpe_id(&current_cpu_data))
-#endif
-
-#else /* !CONFIG_MIPS_PERF_SHARED_TC_COUNTERS */
-#define vpe_id()	0
-
 #endif /* CONFIG_MIPS_PERF_SHARED_TC_COUNTERS */
 
 static void resume_local_counters(void);
@@ -381,8 +369,10 @@ static void mipsxx_pmu_enable_event(struct hw_perf_event *evt, int idx)
 #ifdef CONFIG_CPU_BMIPS5000
 	{
 		/* enable the counter for the calling thread */
-		cpuc->saved_ctrl[idx] |=
-			(1 << (12 + vpe_id())) | BRCM_PERFCTRL_TC;
+		unsigned int vpe_id;
+
+		vpe_id = smp_processor_id() & MIPS_CPUID_TO_COUNTER_MASK;
+		cpuc->saved_ctrl[idx] |= BIT(12 + vpe_id) | BRCM_PERFCTRL_TC;
 	}
 #else
 #ifdef CONFIG_MIPS_MT_SMP
-- 
2.7.4