From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 12E1E21A449; Mon, 24 Nov 2025 10:39:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763980762; cv=none; b=kAU+EeVwoYDeAV3kMyb/hHBv19UGMteBP96qcJTT9QRfKFbkl5sp2QxhTvY/k/PZsmFbTZ4snDfAQGV4ySk272jy+WsJqkM9a1tcH4LlBzM57m7zx+bJPUZU5hyHs4MIczOAQ+1pndOCGdlAEQAA6s6x+rfco9fiBicXGHLx9uc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763980762; c=relaxed/simple; bh=sKzSYKgfcLzAIYddODcCTT28lZBov8xUXigByO0kSKk=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=tfwXqNugZFhRtOT4fkHMLAT7FIMpUQMbTwg/Jxi2ROK2uDaTzksr5PpywsSQICSOqH0sV92OGLOWgrKBIgJr4nPDpVRcE9l434r3uZRjEgJ5utq7PI5e4epavlz5Y+ZnKJMqKzz7wADkmdEcaikVw/5XpAp6YdQ9+apLWWMqObk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 923C0497; Mon, 24 Nov 2025 02:39:11 -0800 (PST) Received: from [10.1.39.148] (e121487-lin.cambridge.arm.com [10.1.39.148]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id C6B8C3F6A8; Mon, 24 Nov 2025 02:39:15 -0800 (PST) Message-ID: Date: Mon, 24 Nov 2025 10:38:49 +0000 Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 1/3] KVM: arm64: Add pre_fault_memory implementation To: Jack Thomson , maz@kernel.org, oliver.upton@linux.dev, pbonzini@redhat.com Cc: joey.gouly@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, catalin.marinas@arm.com, will@kernel.org, shuah@kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, isaku.yamahata@intel.com, xmarcalx@amazon.co.uk, kalyazin@amazon.co.uk, jackabt@amazon.com References: <20251119154910.97716-1-jackabt.amazon@gmail.com> <20251119154910.97716-2-jackabt.amazon@gmail.com> Content-Language: en-GB From: Vladimir Murzin In-Reply-To: <20251119154910.97716-2-jackabt.amazon@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Hi Jack, On 11/19/25 15:49, Jack Thomson wrote: > From: Jack Thomson > > 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 It works quite well for a few cases I have, so FWIW Tested-by: Vladimir Murzin Cheers Vladimir