linux-kernel - Re: [PATCH v2 8/8] riscv: mm: Add support for ZONE

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Message-ID: <87pltntv4p.fsf@all.your.base.are.belong.to.us>
Date: Wed, 15 May 2024 09:03:02 +0200
From: Björn Töpel <bjorn@...nel.org>
To: Alexandre Ghiti <alexghiti@...osinc.com>, Albert Ou
 <aou@...s.berkeley.edu>, David Hildenbrand <david@...hat.com>, Palmer
 Dabbelt <palmer@...belt.com>, Paul Walmsley <paul.walmsley@...ive.com>,
 linux-riscv@...ts.infradead.org
Cc: Björn Töpel <bjorn@...osinc.com>, Andrew Bresticker
 <abrestic@...osinc.com>, Chethan Seshadri
 <Chethan.Seshadri@...alinasystems.io>, Lorenzo Stoakes
 <lstoakes@...il.com>, Oscar Salvador <osalvador@...e.de>, Santosh Mamila
 <santosh.mamila@...alinasystems.io>, Sivakumar Munnangi
 <siva.munnangi@...alinasystems.io>, Sunil V L <sunilvl@...tanamicro.com>,
 linux-kernel@...r.kernel.org, linux-mm@...ck.org,
 virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH v2 8/8] riscv: mm: Add support for ZONE_DEVICE

Björn Töpel <bjorn@...nel.org> writes:

> From: Björn Töpel <bjorn@...osinc.com>
>
> ZONE_DEVICE pages need DEVMAP PTEs support to function
> (ARCH_HAS_PTE_DEVMAP). Claim another RSW (reserved for software) bit
> in the PTE for DEVMAP mark, add the corresponding helpers, and enable
> ARCH_HAS_PTE_DEVMAP for riscv64.

..and this patch has rv32 build issues. Will fix as well.