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Date:   Wed, 12 Jun 2019 11:38:49 +0100
From:   Catalin Marinas <catalin.marinas@arm.com>
To:     Andrey Konovalov <andreyknvl@google.com>
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Subject: Re: [PATCH v16 15/16] vfio/type1, arm64: untag user pointers in
 vaddr_get_pfn
Message-ID: <20190612103848.GA28951@C02TF0J2HF1T.local>
References: <cover.1559580831.git.andreyknvl@google.com>
 <c529e1eeea7700beff197c4456da6a882ce2efb7.1559580831.git.andreyknvl@google.com>
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On Mon, Jun 03, 2019 at 06:55:17PM +0200, Andrey Konovalov wrote:
> This patch is a part of a series that extends arm64 kernel ABI to allow to
> pass tagged user pointers (with the top byte set to something else other
> than 0x00) as syscall arguments.
> 
> vaddr_get_pfn() uses provided user pointers for vma lookups, which can
> only by done with untagged pointers.
> 
> Untag user pointers in this function.
> 
> Signed-off-by: Andrey Konovalov <andreyknvl@google.com>

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>