linux-kernel - Re: [PATCH v3 1/3] KVM: arm64: Add pre_fault

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: <ff581325-199a-4bcb-bf5b-43a6f5ec64be@arm.com>
Date: Mon, 24 Nov 2025 10:38:49 +0000
From: Vladimir Murzin <vladimir.murzin@....com>
To: Jack Thomson <jackabt.amazon@...il.com>, maz@...nel.org,
 oliver.upton@...ux.dev, pbonzini@...hat.com
Cc: joey.gouly@....com, suzuki.poulose@....com, yuzenghui@...wei.com,
 catalin.marinas@....com, will@...nel.org, shuah@...nel.org,
 linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev,
 linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
 isaku.yamahata@...el.com, xmarcalx@...zon.co.uk, kalyazin@...zon.co.uk,
 jackabt@...zon.com
Subject: Re: [PATCH v3 1/3] KVM: arm64: Add pre_fault_memory implementation

Hi Jack,

On 11/19/25 15:49, Jack Thomson wrote:
> From: Jack Thomson <jackabt@...zon.com>
> 
> Add kvm_arch_vcpu_pre_fault_memory() for arm64. The implementation hands
> off the stage-2 faulting logic to either gmem_abort() or
> user_mem_abort().
> 
> Add an optional page_size output parameter to user_mem_abort() to
> return the VMA page size, which is needed when pre-faulting.
> 
> Update the documentation to clarify x86 specific behaviour.
> 
> Signed-off-by: Jack Thomson <jackabt@...zon.com>

It works quite well for a few cases I have, so FWIW

Tested-by: Vladimir Murzin <vladimir.murzin@....com>

Cheers
Vladimir