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Wed, 21 Feb 2024 09:49:42 -0800 (PST) Received: from draig (localhost [IPv6:::1]) by draig.lan (Postfix) with ESMTP id BE5275F875; Wed, 21 Feb 2024 17:49:41 +0000 (GMT) From: =?utf-8?Q?Alex_Benn=C3=A9e?= To: Richard Henderson Cc: qemu-devel@nongnu.org, Ilya Leoshkevich , Pierrick Bouvier , Helge Deller Subject: Re: [PATCH v4 02/36] linux-user: Adjust SVr4 NULL page mapping In-Reply-To: <63284092-627d-4411-a21d-179b8dbf24e9@linaro.org> (Richard Henderson's message of "Tue, 20 Feb 2024 16:07:40 -1000") References: <20240215062018.795056-1-richard.henderson@linaro.org> <20240215062018.795056-3-richard.henderson@linaro.org> <87sf1s4p6a.fsf@draig.linaro.org> <63284092-627d-4411-a21d-179b8dbf24e9@linaro.org> User-Agent: mu4e 1.11.28; emacs 29.1 Date: Wed, 21 Feb 2024 17:49:41 +0000 Message-ID: <87o7c9aeru.fsf@draig.linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=2a00:1450:4864:20::332; envelope-from=alex.bennee@linaro.org; helo=mail-wm1-x332.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Richard Henderson writes: > On 2/16/24 01:35, Alex Benn=C3=A9e wrote: >> Richard Henderson writes: >>=20 >>> Use TARGET_PAGE_SIZE and MAP_FIXED_NOREPLACE. >>> >>> We really should be attending to this earlier during >>> probe_guest_base, as well as better detection and >>> emulation of various Linux personalities. >> Do we know all our supported systems support this flag now? > > We know that target_mmap() itself supports it, even if by emulation. Ahh ok Reviewed-by: Alex Benn=C3=A9e --=20 Alex Benn=C3=A9e Virtualisation Tech Lead @ Linaro