linux-kernel - Re: [PATCH v8 04/14] x86/kasan: Add arch specific kasan functions

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Message-ID: <901fa77a-b23d-4268-81aa-fc76846ac73b@gmail.com>
Date: Fri, 16 Jan 2026 14:35:24 +0100
From: Andrey Ryabinin <ryabinin.a.a@...il.com>
To: Maciej Wieczor-Retman <m.wieczorretman@...me>,
 Alexander Potapenko <glider@...gle.com>,
 Andrey Konovalov <andreyknvl@...il.com>, Dmitry Vyukov <dvyukov@...gle.com>,
 Vincenzo Frascino <vincenzo.frascino@....com>,
 Thomas Gleixner <tglx@...nel.org>, Ingo Molnar <mingo@...hat.com>,
 Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>,
 x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>,
 Andrew Morton <akpm@...ux-foundation.org>,
 David Hildenbrand <david@...nel.org>,
 Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
 "Liam R. Howlett" <Liam.Howlett@...cle.com>, Vlastimil Babka
 <vbabka@...e.cz>, Mike Rapoport <rppt@...nel.org>,
 Suren Baghdasaryan <surenb@...gle.com>, Michal Hocko <mhocko@...e.com>,
 Axel Rasmussen <axelrasmussen@...gle.com>, Yuanchu Xie <yuanchu@...gle.com>,
 Wei Xu <weixugc@...gle.com>
Cc: Maciej Wieczor-Retman <maciej.wieczor-retman@...el.com>,
 kasan-dev@...glegroups.com, linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH v8 04/14] x86/kasan: Add arch specific kasan functions

On 1/12/26 6:27 PM, Maciej Wieczor-Retman wrote:
> From: Maciej Wieczor-Retman <maciej.wieczor-retman@...el.com>
> 
> KASAN's software tag-based mode needs multiple macros/functions to
> handle tag and pointer interactions - to set, retrieve and reset tags
> from the top bits of a pointer.
> 
> Mimic functions currently used by arm64 but change the tag's position to
> bits [60:57] in the pointer.
> 
> Signed-off-by: Maciej Wieczor-Retman <maciej.wieczor-retman@...el.com>
> ---

Reviewed-by: Andrey Ryabinin <ryabinin.a.a@...il.com>