linux-kernel - Re: [PATCH] KVM: arm64: Writable TGRAN*

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Message-ID: <868qpeoydz.wl-maz@kernel.org>
Date: Sun, 09 Mar 2025 18:24:40 +0000
From: Marc Zyngier <maz@...nel.org>
To: Sebastian Ott <sebott@...hat.com>
Cc: Oliver Upton <oliver.upton@...ux.dev>,
	Joey Gouly <joey.gouly@....com>,
	Suzuki K Poulose <suzuki.poulose@....com>,
	Zenghui Yu <yuzenghui@...wei.com>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>,
	linux-arm-kernel@...ts.infradead.org,
	kvmarm@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] KVM: arm64: Writable TGRAN*_2

On Thu, 06 Mar 2025 18:40:13 +0000,
Sebastian Ott <sebott@...hat.com> wrote:
> 
> Allow userspace to write the safe (NI) value for ID_AA64MMFR0_EL1.TGRAN*_2.
> Disallow to change these fields for NV since kvm provides a sanitized view
> for them based on the PAGE_SIZE.
> Also add these bits to the set_id_regs selftest.
> 
> Signed-off-by: Sebastian Ott <sebott@...hat.com>

Acked-by: Marc Zyngier <maz@...nel.org>

	M.

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