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From: "allen.wang" <allen.wang@hj-micro.com>
To: Robin Murphy <robin.murphy@arm.com>, will@kernel.org
Cc: linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, mark.rutland@arm.com,
	peter.du@hj-micro.com, andy.xu@hj-micro.com,
	allen.wang@hj-micro.com
Subject: Re: [PATCH] perf/arm-cmn: Fix {wp_dev_sel2, wp_dev_sel} limited to 0/1 when MXP_MULTIPLE_DTM_EN is TRUE
Date: Wed, 9 Sep 2026 10:01:22 +0800	[thread overview]
Message-ID: <d1c64269-63b3-40ed-9efd-1ba545f8cb2e@hj-micro.com> (raw)
In-Reply-To: <58adffd2-6ef4-4a4c-ba3a-3f510522d928@arm.com>

Hi Robin:

Yes, that's exactly what I'm saying. I've tested this on actual
multi-DTM hardware, and the hardware does not ignore wp_dev_sel2
automatically — it must be correctly configured by software.

Thanks!
Allen

On 9/8/2026 11:04 PM, Robin Murphy wrote:
> https://support.arm.com/documentation/102308/0307/Debug-trace-and-PMU/
> Debug-Trace-system-overview/DTM-watchpoint?lang=en



  reply	other threads:[~2026-09-09  2:01 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-08-19 10:54 [PATCH] perf/arm-cmn: Fix {wp_dev_sel2, wp_dev_sel} limited to 0/1 when MXP_MULTIPLE_DTM_EN is TRUE Shouping Wang
2026-09-08  8:15 ` allen.wang
2026-09-08 15:04   ` Robin Murphy
2026-09-09  2:01     ` allen.wang [this message]
2026-09-09 16:19 ` Robin Murphy
2026-09-10 11:46   ` [PATCH v2] perf/arm-cmn: Fix wp_dev_sel2 setting for multi-DTM configurations Shouping Wang
2026-09-10 11:54     ` sashiko-bot
2026-09-10 12:37     ` Robin Murphy
2026-09-11 13:44     ` Will Deacon

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