linux-kernel - Re: [PATCH] KVM: arm64: nv: Fix MI line level calculation in vgic_v3_nested_update

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Message-Id: <175092436132.7925.6436811848886215951.b4-ty@kernel.org>
Date: Thu, 26 Jun 2025 08:52:50 +0100
From: Marc Zyngier <maz@...nel.org>
To: linux-arm-kernel@...ts.infradead.org,
	kvmarm@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Wei-Lin Chang <r09922117@...e.ntu.edu.tw>
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>,
	Jintack Lim <jintack@...columbia.edu>,
	Christoffer Dall <christoffer.dall@....com>
Subject: Re: [PATCH] KVM: arm64: nv: Fix MI line level calculation in vgic_v3_nested_update_mi()

On Wed, 25 Jun 2025 16:47:09 +0800, Wei-Lin Chang wrote:
> The state of the vcpu's MI line should be asserted when its
> ICH_HCR_EL2.En is set and ICH_MISR_EL2 is non-zero. Using bitwise AND
> (&=) directly for this calculation will not give us the correct result
> when the LSB of the vcpu's ICH_MISR_EL2 isn't set. Correct this by first
> adjusting the return value of vgic_v3_get_misr() into 1 if it is
> non-zero.
> 
> [...]

Applied to fixes, thanks!

[1/1] KVM: arm64: nv: Fix MI line level calculation in vgic_v3_nested_update_mi()
      commit: af040a9a296044fd4b748786c2516f172a7617f1

Cheers,

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