linux-kernel - Re: [PATCH v8 12/43] KVM: arm64: vgic: Provide helper for number of list registers

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <0a13ff01-c5f4-40c1-93b4-60e58b0b4ae4@arm.com>
Date: Thu, 1 May 2025 17:51:51 +0100
From: Suzuki K Poulose <suzuki.poulose@....com>
To: Steven Price <steven.price@....com>, kvm@...r.kernel.org,
 kvmarm@...ts.linux.dev
Cc: Catalin Marinas <catalin.marinas@....com>, Marc Zyngier <maz@...nel.org>,
 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>
Subject: Re: [PATCH v8 12/43] KVM: arm64: vgic: Provide helper for number of
 list registers

On 16/04/2025 14:41, Steven Price wrote:
> Currently the number of list registers available is stored in a global
> (kvm_vgic_global_state.nr_lr). With Arm CCA the RMM is permitted to
> reserve list registers for its own use and so the number of available
> list registers can be fewer for a realm VM. Provide a wrapper function
> to fetch the global in preparation for restricting nr_lr when dealing
> with a realm VM.
> 
> Signed-off-by: Steven Price <steven.price@....com>

Reviewed-by: Suzuki K Poulose <suzuki.poulose@....com>