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AJvYcCWogClYsZ0HT/dv6Vw22VU6BgRL00+jq7dX4qUX1cvdH5gPfYQ7LhtK4NnYQK1pUfDxYrKOzsM/QAxWWpVwXbbbAno= X-Gm-Message-State: AOJu0YzYkjZZKt2rPN3PEeZfLIUkrdc2WuvMtLn7f3U+3Ks+cBJEqOGb zDWL/qKUhdDdk60v4n8GLo8az4NmIaAs6FulXd4ypVrqrtW5Ku5QBwh6Hv1EiqCO3BkOh4NLEA3 qsRpNtP2o+b9da61fjp2gwhdzn1LZiLFvEZY5lugIWEvTW1kZoI0= X-Google-Smtp-Source: AGHT+IHeyRQcXRicFrSlT78VEU+Vzn8mFeWtih7N+0UKFhl1TiJbXhDluQaV4kTzz7cFxWm7uIPajzR+MoCnf8A5Y2k= X-Received: by 2002:a05:622a:411:b0:432:f652:1a52 with SMTP id n17-20020a05622a041100b00432f6521a52mr1067238qtx.55.1712189851730; Wed, 03 Apr 2024 17:17:31 -0700 (PDT) MIME-Version: 1.0 References: <20240402051154.476244-1-rmclure@linux.ibm.com> <20240402051154.476244-12-rmclure@linux.ibm.com> In-Reply-To: <20240402051154.476244-12-rmclure@linux.ibm.com> From: Pasha Tatashin Date: Wed, 3 Apr 2024 20:16:54 -0400 Message-ID: Subject: Re: [PATCH v12 11/11] powerpc: mm: Support page table check To: Rohan McLure Cc: linuxppc-dev@lists.ozlabs.org, mpe@ellerman.id.au, christophe.leroy@csgroup.eu, linux-mm@kvack.org, linux-riscv@lists.infradead.org, linux-arm-kernel@lists.infradead.org, x86@kernel.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 799FD20017 X-Stat-Signature: azwhwkujzc6mjijpmqxnh8hxsjnr1z4m X-HE-Tag: 1712189852-979462 X-HE-Meta: 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 3aoCdLeb Wh0YhCftXDd8jcggE7P3yIckKe+yHQBHLzJSv6HqUSa5sy0S2fIp81wN55yrGPIa9dP+L7h2IHdiDJre4pLaQKEgqUJIRV3fp1YozM0aCtCQs1WRtM+FlGehkA+rTmhzKCIjfQlzMqvvqaGZSIP+54w/sQwQIhyRu/7vPmEvUtF/+7rBGAdIXrc7CeI8QCxaVi5+fdKJcqjz67m2V8RqUDEPu4elhUd6d/n5akYtvLYKcoGcLV8Bo8i/p0nbBPEHTl2k2tt5NZdcAyAKV64UgkZBQq+/AP2AFmhi8CmTqKQTzLClWW++ToVv3i15bAeJ0Jfh5y6GfEOwk8hAmKrGF7JCNe8N2OQg9pOQICsvWmXrUa6cV3ZqnLMzptD29BehbtjjvXSk4zAfdcBiMk1k2Pj2RSVRL3vhO9sqI9CpcroJ7C0w= X-Bogosity: Ham, tests=bogofilter, spamicity=0.003218, 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, Apr 2, 2024 at 1:13=E2=80=AFAM Rohan McLure = wrote: > > On creation and clearing of a page table mapping, instrument such calls > by invoking page_table_check_pte_set and page_table_check_pte_clear > respectively. These calls serve as a sanity check against illegal > mappings. > > Enable ARCH_SUPPORTS_PAGE_TABLE_CHECK for all platforms. > > See also: > > riscv support in commit 3fee229a8eb9 ("riscv/mm: enable > ARCH_SUPPORTS_PAGE_TABLE_CHECK") > arm64 in commit 42b2547137f5 ("arm64/mm: enable > ARCH_SUPPORTS_PAGE_TABLE_CHECK") > x86_64 in commit d283d422c6c4 ("x86: mm: add x86_64 support for page tabl= e > check") > > Reviewed-by: Christophe Leroy > Signed-off-by: Rohan McLure Reviewed-by: Pasha Tatashin Thank you for this work! Pasha