{"id":118740,"date":"2024-08-01T03:43:00","date_gmt":"2024-08-01T01:43:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-gipervizora-xen-4-19"},"modified":"2024-08-01T03:43:00","modified_gmt":"2024-08-01T01:43:00","slug":"vypusk-gipervizora-xen-4-19","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/vypusk-gipervizora-xen-4-19","title":{"rendered":"Uscita del hypervisor Xen 4.19","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Dopo 8 mesi di sviluppo, \u00e8 stata pubblicata la versione del hypervisor open source Xen 4.19. Tra le aziende che hanno partecipato allo sviluppo della nuova release ci sono Amazon, Arm, EPAM Systems e AMD. La serie di aggiornamenti per Xen 4.19 continuer\u00e0 fino a febbraio 2026, mentre la pubblicazione delle correzioni di vulnerabilit\u00e0 si protrarr\u00e0 fino ad agosto 2027.      <\/p>\n<p>Modifiche principali in Xen 4.19:   <\/p>\n<ul>\n<li class=\"l\"> Per i sistemi basati su architettura ARM \u00e8 stata aggiunta la supporto per il meccanismo di scambio dati asincrono \u00abFF-A Notifications\u00bb, descritto nella specifica FF-A (Firmware Framework for Arm A-profile). \u00c8 stata implementata la possibilit\u00e0 di aggiungere e rimuovere dinamicamente nodi nell'albero dei dispositivi Xen tramite file .dtbo.\n<li class=\"l\"> Per i sistemi basati su architettura x86 \u00e8 stato aggiunto un nuovo driver per il controller delle interruzioni x2APIC, che utilizza la modalit\u00e0 di indirizzamento logico (Cluster Logical) per le interruzioni interne (IPI, inter-processor interrupt) e la modalit\u00e0 di indirizzamento fisico per le interruzioni esterne.\n<li class=\"l\"> Il supporto per i processori Intel XeonPhi \u00e8 stato dichiarato obsoleto e verr\u00e0 interrotto nella prossima versione.\n<li class=\"l\"> \u00c8 stato aggiornato a \u00absupportato con riserve\u00bb la modalit\u00e0 di virtualizzazione PVH per dom0, che combina elementi delle modalit\u00e0 di paravirtualizzazione (PV) per input\/output, gestione delle interruzioni, caricamento e interazione con l'hardware, utilizzando la virtualizzazione completa (HVM) per limitare le istruzioni privilegiate, isolare le chiamate di sistema e virtualizzare le tabelle delle pagine di memoria. In PVH\/HVM \u00e8 stato aggiunto il supporto per il mapping delle pagine di memoria straniere (\u00abforeign pages\u00bb), consentendo di utilizzare QEMU stubdomain per isolare e gestire dispositivi in modalit\u00e0 PVH. Sono state apportate ottimizzazioni che accelerano il caricamento utilizzando PVH. \u00c8 stata aggiunta l'impostazione XENFEAT_hvm_pirqs, che consente di abilitare selettivamente il supporto pIRQ per i sistemi guest eseguiti in modalit\u00e0 HVM (virtualizzazione completa).\n<li class=\"l\"> \u00c8 stato aggiunto un nuovo backend 9pfs, che consente di utilizzare il file system di rete Plan 9 per l'accesso da una macchina virtuale all'altra. Il nuovo backend viene eseguito come processo in background nell'ambiente host (dom0). Questo backend \u00e8 gi\u00e0 attivo in Xenstore-stubdom per il supporto completo della tracciabilit\u00e0 di Xenstore.\n<li class=\"l\"> Il numero massimo di CPU utilizzabili in Xen \u00e8 stato aumentato da 4095 a 16383.\n<li class=\"l\"> Durante la compilazione con systemd (.\/configure \u2014enable-systemd), \u00e8 stata esclusa dalla dipendenza di compilazione la libreria libsystemd (il supporto per systemd-notify \u00e8 implementato attraverso una libreria ridotta personalizzata).\n<li class=\"l\"> Per analizzare le tracce per CPU AMD in xenalyze non \u00e8 pi\u00f9 necessario utilizzare l'opzione \u00ab\u2014svm-mode\u00bb.\n<li class=\"l\"> Continua l'implementazione dei requisiti per lo sviluppo di software sicuro e affidabile in linguaggio C, come specificato nelle specifiche MISRA-C per i sistemi critici.\n<li class=\"l\"> Proseguono i lavori sui port per le architetture RISC-V e Power (ppc64le).       <\/ul>\n<p>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=61640\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 8 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u0433\u0438\u043f\u0435\u0440\u0432\u0438\u0437\u043e\u0440\u0430 Xen 4.19. \u0412 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u043d\u043e\u0432\u043e\u0433\u043e \u0432\u044b\u043f\u0443\u0441\u043a\u0430 \u043f\u0440\u0438\u043d\u044f\u043b\u0438 \u0443\u0447\u0430\u0441\u0442\u0438\u0435 \u0442\u0430\u043a\u0438\u0435 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438, \u043a\u0430\u043a Amazon, Arm, EPAM Systems \u0438 AMD. \u0424\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0439 \u0434\u043b\u044f \u0432\u0435\u0442\u043a\u0438 Xen 4.19 \u043f\u0440\u043e\u0434\u043b\u0438\u0442\u0441\u044f \u0434\u043e \u0444\u0435\u0432\u0440\u0430\u043b\u044f 2026 \u0433\u043e\u0434\u0430, \u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u044f \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u0434\u043e \u0430\u0432\u0433\u0443\u0441\u0442\u0430 2027 \u0433\u043e\u0434\u0430. \u041a\u043b\u044e\u0447\u0435\u0432\u044b\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0432 Xen 4.19: \u0414\u043b\u044f \u0441\u0438\u0441\u0442\u0435\u043c \u043d\u0430 \u0431\u0430\u0437\u0435 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u044b ARM 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\u00e8 stato pubblicato il rilascio dell'hypervisor libero Xen 4.19. Aziende come Amazon, Arm, EPAM Systems e AMD hanno partecipato allo sviluppo della nuova versione. La creazione di aggiornamenti per il ramo Xen 4.19 continuer\u00e0 fino a febbraio 2026, mentre la pubblicazione delle patch per vulnerabilit\u00e0 proseguir\u00e0 fino ad agosto 2027. 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