From: "guojinhui.liam" <guojinhui.liam@bytedance.com>
To: will@kernel.org, mark.rutland@arm.com
Cc: lizefan.x@bytedance.com, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
"guojinhui.liam" <guojinhui.liam@bytedance.com>
Subject: [PATCH] perf/arm-cmn: Fix CMN_DTM_UNIT_INFO offset in CMN700
Date: Tue, 12 Sep 2023 12:03:09 +0800 [thread overview]
Message-ID: <20230912040309.1789-1-guojinhui.liam@bytedance.com> (raw)
The por_dtm_unit_info's offest is 0x0960 in CMN700 according to
the CMN700 spec.
CMN700 spec link:
https://developer.arm.com/documentation/102308/0302/?lang=en
por_dtm_unit_info can be found in section [4.3.13.10 por_dtm_unit_info].
Signed-off-by: guojinhui.liam <guojinhui.liam@bytedance.com>
---
drivers/perf/arm-cmn.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c
index 913dc04b3a40..6f3fafee0ac9 100644
--- a/drivers/perf/arm-cmn.c
+++ b/drivers/perf/arm-cmn.c
@@ -113,6 +113,7 @@
#define CMN_DTM_PMEVCNTSR 0x240
#define CMN_DTM_UNIT_INFO 0x0910
+#define CMN700_DTM_UNIT_INFO 0x0960
#define CMN_DTM_NUM_COUNTERS 4
/* Want more local counters? Why not replicate the whole DTM! Ugh... */
@@ -2247,6 +2248,8 @@ static int arm_cmn_discover(struct arm_cmn *cmn, unsigned int rgn_offset)
if (cmn->part == PART_CMN600)
xp->dtc = 0xf;
+ else if (cmn->part == PART_CMN700)
+ xp->dtc = 1 << readl_relaxed(xp_region + CMN700_DTM_UNIT_INFO);
else
xp->dtc = 1 << readl_relaxed(xp_region + CMN_DTM_UNIT_INFO);
--
2.20.1
next reply other threads:[~2023-09-12 4:03 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-12 4:03 guojinhui.liam [this message]
2023-09-12 8:08 ` Robin Murphy
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