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bh=4Omb9fL9pYBVNmsBr/NUGlX2X/ezKCtai37AGxThYSk=; b=cO2BuV+MLqrFuREJEEwO3KZE7Ek+IeoLVa63q692S4j2xBUbfff5OCT9Gd3yu+Zcs9G8Py AJg/N8Y1TI5zRADg== Received: by hawking.nue2.suse.org (Postfix, from userid 17005) id 0C83B4A0561; Tue, 18 Mar 2025 12:10:56 +0100 (CET) From: Andreas Schwab To: Helge Deller Cc: qemu-devel@nongnu.org Subject: Re: Generic way to detect qemu linux-user emulation In-Reply-To: (Helge Deller's message of "Tue, 18 Mar 2025 11:36:03 +0100") References: Date: Tue, 18 Mar 2025 12:10:56 +0100 Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spamd-Result: default: False [15.15 / 50.00]; SPAM_FLAG(5.00)[]; NEURAL_SPAM_LONG(3.50)[1.000]; BAYES_HAM(-3.00)[99.99%]; NEURAL_SPAM_SHORT(2.86)[0.952]; HFILTER_HOSTNAME_UNKNOWN(2.50)[]; RDNS_NONE(2.00)[]; ONCE_RECEIVED(1.20)[]; HFILTER_HELO_IP_A(1.00)[hawking.nue2.suse.org]; HFILTER_HELO_NORES_A_OR_MX(0.30)[hawking.nue2.suse.org]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; MIME_GOOD(-0.10)[text/plain]; RCVD_NO_TLS_LAST(0.10)[]; MX_GOOD(-0.01)[]; FUZZY_BLOCKED(0.00)[rspamd.com]; DIRECT_TO_MX(0.00)[Gnus/5.13 (Gnus v5.13)]; MIME_TRACE(0.00)[0:+]; ARC_NA(0.00)[]; FREEMAIL_TO(0.00)[gmx.de]; RCPT_COUNT_TWO(0.00)[2]; FREEMAIL_ENVRCPT(0.00)[gmx.de]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; MID_RHS_MATCH_FROM(0.00)[]; DKIM_TRACE(0.00)[suse.de:+]; RCVD_COUNT_ONE(0.00)[1]; TO_DN_SOME(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:dkim,suse.de:mid,suse.de:email] X-Rspamd-Queue-Id: 4F2121F770 X-Rspamd-Action: add header X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Spamd-Bar: +++++++++++++++ X-Spam: Yes Received-SPF: pass client-ip=195.135.223.131; envelope-from=schwab@suse.de; helo=smtp-out2.suse.de X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 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_MED=-2.3, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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 On Mär 18 2025, Helge Deller wrote: > My current (unreliable) way to detect it is using uname. > The kernel string and arch name don't match: > > (sid_hppa)root@paq:/# uname -a > Linux paq 6.1.0-31-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.128-1 (2025-02-07) parisc GNU/Linux > > (sid_hppa)root@paq:/# uname -r > 6.1.0-31-amd64 > > (sid_hppa)root@paq:/# uname -m > parisc > > This is a qemu-linux-user parisc(hppa) emulation running on x86-64. That is highly distribution specific, by default the release part does not contain anything arch specific. For riscv the most reliable way is to look for "uarch *: qemu" in /proc/cpuinfo. -- Andreas Schwab, SUSE Labs, schwab@suse.de GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7 "And now for something completely different."