linux-kernel - Re: [PATCH v10 08/43] kvm: arm64: Don't expose debug capabilities for realm guests

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Message-ID: <86ikgyzrzj.wl-maz@kernel.org>
Date: Wed, 01 Oct 2025 14:11:44 +0100
From: Marc Zyngier <maz@...nel.org>
To: Steven Price <steven.price@....com>
Cc: kvm@...r.kernel.org,
	kvmarm@...ts.linux.dev,
	Suzuki K Poulose <suzuki.poulose@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>,
	James Morse <james.morse@....com>,
	Oliver Upton <oliver.upton@...ux.dev>,
	Zenghui Yu <yuzenghui@...wei.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Joey Gouly <joey.gouly@....com>,
	Alexandru Elisei <alexandru.elisei@....com>,
	Christoffer Dall <christoffer.dall@....com>,
	Fuad Tabba <tabba@...gle.com>,
	linux-coco@...ts.linux.dev,
	Ganapatrao Kulkarni <gankulkarni@...amperecomputing.com>,
	Gavin Shan <gshan@...hat.com>,
	Shanker Donthineni <sdonthineni@...dia.com>,
	Alper Gun <alpergun@...gle.com>,
	"Aneesh Kumar K . V" <aneesh.kumar@...nel.org>,
	Emi Kisanuki <fj0570is@...itsu.com>,
	Vishal Annapurve <vannapurve@...gle.com>
Subject: Re: [PATCH v10 08/43] kvm: arm64: Don't expose debug capabilities for realm guests

On Wed, 20 Aug 2025 15:55:28 +0100,
Steven Price <steven.price@....com> wrote:
> 
> From: Suzuki K Poulose <suzuki.poulose@....com>
> 
> RMM v1.0 provides no mechanism for the host to perform debug operations
> on the guest. So don't expose KVM_CAP_SET_GUEST_DEBUG and report 0
> breakpoints and 0 watch points.

What is the guest seeing for the same things?

	M.

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