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From:   Anshuman Khandual <anshuman.khandual@arm.com>
To:     linux-arm-kernel@lists.infradead.org
Cc:     Anshuman Khandual <anshuman.khandual@arm.com>,
        Will Deacon <will@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        linux-kernel@vger.kernel.org
Subject: [PATCH] drivers: perf: arm_pmuv3: Update 'pmc_width' based on actual HW event width
Date:   Mon,  9 Oct 2023 10:07:24 +0530
Message-Id: <20231009043724.175100-1-anshuman.khandual@arm.com>
MIME-Version: 1.0
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This updates 'perf_event_mmap_page->pmc_width' based on actual HW event's
width that are currently missing i.e ARMPMU_EVT_63BIT and ARMPMU_EVT_47BIT.

Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
This applies on v6.6-rc5.

 drivers/perf/arm_pmuv3.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/perf/arm_pmuv3.c b/drivers/perf/arm_pmuv3.c
index fe4db1831662..94723d00548e 100644
--- a/drivers/perf/arm_pmuv3.c
+++ b/drivers/perf/arm_pmuv3.c
@@ -1375,6 +1375,10 @@ void arch_perf_update_userpage(struct perf_event *event,
 	if (userpg->cap_user_rdpmc) {
 		if (event->hw.flags & ARMPMU_EVT_64BIT)
 			userpg->pmc_width = 64;
+		else if (event->hw.flags & ARMPMU_EVT_63BIT)
+			userpg->pmc_width = 63;
+		else if (event->hw.flags & ARMPMU_EVT_47BIT)
+			userpg->pmc_width = 47;
 		else
 			userpg->pmc_width = 32;
 	}
-- 
2.25.1