linux-kernel - Re: [PATCH] loongarch: wire up memfd

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] [day] [month] [year] [list]

Message-ID: <aXXpYqDyTeftKV2c@kernel.org>
Date: Sun, 25 Jan 2026 11:58:58 +0200
From: Mike Rapoport <rppt@...nel.org>
To: Huacai Chen <chenhuacai@...nel.org>
Cc: Lain Fearyncess Yang <fearyncess@...c.io>,
	WANG Xuerui <kernel@...0n.name>, Kexy Biscuit <kexybiscuit@...c.io>,
	Mingcong Bai <jeffbai@...c.io>,
	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>,
	Suren Baghdasaryan <surenb@...gle.com>,
	Michal Hocko <mhocko@...e.com>, Shuah Khan <shuah@...nel.org>,
	Paul Walmsley <pjw@...nel.org>, Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>, Alexandre Ghiti <alex@...ti.fr>,
	Arnd Bergmann <arnd@...db.de>,
	Jiaxun Yang <jiaxun.yang@...goat.com>, loongarch@...ts.linux.dev,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-kselftest@...r.kernel.org, linux-riscv@...ts.infradead.org
Subject: Re: [PATCH] loongarch: wire up memfd_secret system call

On Sun, Jan 25, 2026 at 12:03:25PM +0800, Huacai Chen wrote:
> On Fri, Jan 9, 2026 at 4:21 PM Mike Rapoport <rppt@...nel.org> wrote:
> >
> > On Fri, Jan 09, 2026 at 01:10:51PM +0800, Lain Fearyncess Yang wrote:
> > > From: "Lain \"Fearyncess\" Yang" <fearyncess@...c.io>
> > >
> > > LoongArch supports ARCH_HAS_SET_DIRECT_MAP, therefore wire up the
> > > memfd_secret system call, which depends on it.
> >
> > LoongArch version of set_memory* does not support splitting of leaf PMD
> > entries. Does LoongArch always use PTE-level mappings in the direct map?
> No PMD level mappings now.

Thanks for the clarification. You can add

Acked-by: Mike Rapoport (Microsoft) <rppt@...nel.org>

if it's not too late :)

> Huacai

-- 
Sincerely yours,
Mike.