linux-kernel - Re: [PATCH 28/33] arm_mpam: Consider overflow in bandwidth counter state

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Message-ID: <20251110173259.00002c88@huawei.com>
Date: Mon, 10 Nov 2025 17:32:59 +0000
From: Jonathan Cameron <jonathan.cameron@...wei.com>
To: Ben Horgan <ben.horgan@....com>
CC: <james.morse@....com>, <amitsinght@...vell.com>,
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	<xhao@...ux.alibaba.com>, Zeng Heng <zengheng4@...wei.com>
Subject: Re: [PATCH 28/33] arm_mpam: Consider overflow in bandwidth counter
 state

On Fri, 7 Nov 2025 12:34:45 +0000
Ben Horgan <ben.horgan@....com> wrote:

> Use the overflow status bit to track overflow on each bandwidth counter
> read and add the counter size to the correction when overflow is detected.
> 
> This assumes that only a single overflow has occurred since the last read
> of the counter. Overflow interrupts, on hardware that supports them could
> be used to remove this limitation.
> 
> Cc: Zeng Heng <zengheng4@...wei.com>
> Signed-off-by: Ben Horgan <ben.horgan@....com>

Reviewed-by: Jonathan Cameron <jonathan.cameron@...wei.com>