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From: Marc Zyngier <maz@kernel.org>
To: Fuad Tabba <tabba@google.com>
Cc: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org,
	oliver.upton@linux.dev, will@kernel.org, joey.gouly@arm.com,
	suzuki.poulose@arm.com, yuzenghui@huawei.com,
	catalin.marinas@arm.com, james.morse@arm.com,
	jingzhangos@google.com, anshuman.khandual@arm.com,
	shameerali.kolothum.thodi@huawei.com, gshan@redhat.com
Subject: Re: [PATCH v1] arm64: head.S: Do not trap access to MPAMSM_EL1
Date: Wed, 05 Feb 2025 17:02:22 +0000	[thread overview]
Message-ID: <86tt98tjdt.wl-maz@kernel.org> (raw)
In-Reply-To: <20250205164630.1706058-1-tabba@google.com>

On Wed, 05 Feb 2025 16:46:27 +0000,
Fuad Tabba <tabba@google.com> wrote:
> 
> Bit 50 of MPAM2_EL2, EnMPAMSM, traps access to MPAMSM_EL1 when 0,
> as per ARM ARM DDI DDI0487L.a, section D24.12.3. Therefore,
> ensure it is set to 1 for the host to disable the traps.

But what makes use of this register in the kernel? I can't find any
trace of it in 6.14-rc1.

Thanks,

	M.

-- 
Without deviation from the norm, progress is not possible.

  reply	other threads:[~2025-02-05 17:02 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-02-05 16:46 [PATCH v1] arm64: head.S: Do not trap access to MPAMSM_EL1 Fuad Tabba
2025-02-05 17:02 ` Marc Zyngier [this message]
2025-02-06 10:06   ` Fuad Tabba

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