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Thu, 2 Jan 2025 11:52:44 +0000 (UTC) Date: Thu, 2 Jan 2025 12:52:37 +0100 From: Borislav Petkov To: Rik van Riel Cc: x86@kernel.org, linux-kernel@vger.kernel.org, kernel-team@meta.com, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, akpm@linux-foundation.org, nadav.amit@gmail.com, zhengqi.arch@bytedance.com, linux-mm@kvack.org Subject: Re: [PATCH 01/12] x86/mm: make MMU_GATHER_RCU_TABLE_FREE unconditional Message-ID: <20250102115237.GGZ3Z-BUqBauHEfB10@fat_crate.local> References: <20241230175550.4046587-1-riel@surriel.com> <20241230175550.4046587-2-riel@surriel.com> <20241230184118.GMZ3LpTn3dHvu_bq-p@fat_crate.local> <20241231161931.GFZ3QZk8kSgiImE90y@fat_crate.local> <8aa196d4c781444cf55993faea56161b926cb311.camel@surriel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <8aa196d4c781444cf55993faea56161b926cb311.camel@surriel.com> X-Rspamd-Queue-Id: 413BE14000A X-Rspam-User: X-Rspamd-Server: rspam07 X-Stat-Signature: bbu5ir5hny7pebphf8dp6btscq5zrx3o X-HE-Tag: 1735818749-623259 X-HE-Meta: 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 o1WTGLZG YNkBqbHaekVOMe5qf21Rro8lnsf5W/8cpaA5S+Lkv4Xy0znpwOJBrT2C96ktrDHDlyLt48+phtNKUN8GFR2T7bh8xZahah4fff5jcyslVJlu2JOV/1Io4N39SoF0V2Ipeq3FY2QynviAM1jK3bhyij+FJdsvm9w3tccoZoy/bJfFCF5dPLfepKU4It0v9LvqN3wKoWlDpj4VeQOMaARaeiY98pK8w7Ww5S7iNtvFnk0T5tbFLGzKLjVD9JeD15yzOIthmAR/1RQZfwYUzB+uSNLPKV3Q8fS9cbL0qOvJGHWtGckQL8LwESP2VQ2PPlFPOyi76rKF1kV6xdoqX2HUPSKIjejCat/lJd5eBF/kV245EFiyUT978qJpwig== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, Dec 31, 2024 at 11:30:48AM -0500, Rik van Riel wrote: > I'll wait for you to finish making your way > through before coming up with a v4 :) Thanks! > It looks like with this patch the translation cache > extensions get enabled (when I read back the MSR), > but the AMD manual suggests I may need to enable > EFER.TCE separately on every CPU? Yes, you do. EFER is a per-thread MSR. cpu/amd.c is where we usually do enable features. Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette