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Fri, 19 Sep 2025 17:19:18 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id M0clO5aQzWjWYAAAD6G6ig (envelope-from ); Fri, 19 Sep 2025 17:19:18 +0000 From: Fabiano Rosas To: Cornelia Huck , qemu-arm@nongnu.org, qemu-devel@nongnu.org Cc: Peter Maydell , Eric Auger , Sebastian Ott , Cornelia Huck Subject: Re: [PATCH v3] arm/kvm: report registers we failed to set In-Reply-To: <20250911154159.158046-1-cohuck@redhat.com> References: <20250911154159.158046-1-cohuck@redhat.com> Date: Fri, 19 Sep 2025 14:19:16 -0300 Message-ID: <87jz1utl63.fsf@suse.de> MIME-Version: 1.0 Content-Type: text/plain X-Spamd-Result: default: False [-4.29 / 50.00]; BAYES_HAM(-2.99)[99.96%]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.20)[-0.999]; MIME_GOOD(-0.10)[text/plain]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; RCVD_TLS_ALL(0.00)[]; MISSING_XM_UA(0.00)[]; FUZZY_RATELIMITED(0.00)[rspamd.com]; MIME_TRACE(0.00)[0:+]; RCPT_COUNT_SEVEN(0.00)[7]; MID_RHS_MATCH_FROM(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:mid,imap1.dmz-prg2.suse.org:helo] Received-SPF: pass client-ip=195.135.223.130; envelope-from=farosas@suse.de; helo=smtp-out1.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_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-arm@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-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org Sender: qemu-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org Cornelia Huck writes: > If we fail migration because of a mismatch of some registers between > source and destination, the error message is not very informative: > > qemu-system-aarch64: error while loading state for instance 0x0 ofdevice 'cpu' > qemu-system-aarch64: Failed to put registers after init: Invalid argument Beats "load of migration failed: -5" Thank you for this, it's always good to improve these error messages. > > At least try to give the user a hint which registers had a problem, > even if they cannot really do anything about it right now. > > Sample output: > > Could not set register op0:3 op1:0 crn:0 crm:0 op2:0 to c00fac31 (is 413fd0c1) > > We could be even more helpful once we support writable ID registers, > at which point the user might actually be able to configure something > that is migratable. > > Suggested-by: Eric Auger > Reviewed-by: Sebastian Ott > Signed-off-by: Cornelia Huck