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[104.155.118.152]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c1c32a78229sm131383566b.1.2026.07.22.08.17.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 22 Jul 2026 08:17:22 -0700 (PDT) Date: Wed, 22 Jul 2026 15:17:19 +0000 From: Adrian =?utf-8?Q?Barna=C5=9B?= To: "Mike Rapoport (Microsoft)" Cc: linux-mm@kvack.org, Albert Ou , Andrew Morton , Andy Lutomirski , Borislav Petkov , Brendan Jackman , Catalin Marinas , Dave Hansen , David Hildenbrand , Huacai Chen , Ingo Molnar , Ingo Molnar , Kevin Brodsky , "Liam R. Howlett" , Lorenzo Stoakes , Michal Hocko , Palmer Dabbelt , Paul Walmsley , Peter Zijlstra , "H. Peter Anvin" , Suren Baghdasaryan , Thomas Gleixner , Vlastimil Babka , Will Deacon , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, loongarch@lists.linux.dev, x86@kernel.org, Dave Hansen , Juergen Gross Subject: Re: [PATCH RFC 00/18] arch, mm: create a generic set_memory/change_page_attr core Message-ID: References: <20260721-generic-set-memory-v0-1-v1-0-2c1fc62306b3@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: <20260721-generic-set-memory-v0-1-v1-0-2c1fc62306b3@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260722_081726_801279_01B5D19E X-CRM114-Status: GOOD ( 11.63 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Jul 21, 2026 at 07:23:23PM +0300, Mike Rapoport (Microsoft) wrote: Hi Mike, >Once this settles, the next step I'm planning is to convert arm64. This >would be much more involved than loongarch and riscv together, so I >didn't even aspire to include arm64 in the first RFC. That said, I have >a very ugly arm64 prototype that rewrites arch/arm64/pageattr.c to use >the generic CPA infrastructure and replaces the existing implementation >of page table splits for systems that support bbml2. But there's a lot >of yak shaving there to get from a PoC to actual patches. Could you share your PoC for ARM64. I can help you with that and align my execmem rox cache for ARM64 changes to the desired shape of this API. Best regards, Adrian