{"id":99703,"date":"2021-04-12T10:23:04","date_gmt":"2021-04-12T08:23:04","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-gipervizora-xen-4-15"},"modified":"2021-04-12T10:23:04","modified_gmt":"2021-04-12T08:23:04","slug":"vypusk-gipervizora-xen-4-15","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/vypusk-gipervizora-xen-4-15","title":{"rendered":"Rilascio del hypervisor Xen 4.15","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Dopo otto mesi di sviluppo \u00e8 stata pubblicata la versione finale del hypervisor open source Xen 4.15. Allo sviluppo di questa nuova versione hanno partecipato aziende come Amazon, Arm, Bitdefender, Citrix ed EPAM Systems. L'uscita degli aggiornamenti per la serie Xen 4.15 durer\u00e0 fino all'8 ottobre 2022, mentre la pubblicazione delle correzioni per le vulnerabilit\u00e0 continuer\u00e0 fino all'8 aprile 2024.      <\/p>\n<p>Modifiche chiave in Xen 4.15:   <\/p>\n<ul>\n<li class=\"l\"> Nei processi Xenstored e oxenstored \u00e8 stata implementata un supporto sperimentale per gli aggiornamenti live, che consente di distribuire e applicare le correzioni delle vulnerabilit\u00e0 senza riavviare l'ambiente host.\n<li class=\"l\"> \u00c8 stato aggiunto il supporto per le immagini di avvio unificate, che consentono di creare immagini di sistema che includono anche componenti di Xen. Tali immagini sono confezionate come un unico file binario per EFI, utilizzabile per avviare direttamente un sistema Xen funzionante dal boot loader EFI, senza caricamenti intermedi come GRUB. Nell'immagine vengono inclusi componenti di Xen come l'hypervisor, il kernel per l'ambiente host (dom0), initrd, Xen KConfig, impostazioni XSM e Device Tree.\n<li class=\"l\"> Per la piattaforma ARM \u00e8 stata implementata la possibilit\u00e0 sperimentale di eseguire modelli di dispositivo lato host (dom0), permettendo di emulare dispositivi hardware arbitrari per sistemi guest basati su architettura ARM. Per ARM \u00e8 stato fornito anche supporto per SMMUv3 (System Memory Management Unit), che aumenta la sicurezza e l'affidabilit\u00e0 del passaggio dei dispositivi su sistemi ARM.\n<li class=\"l\"> \u00c8 stata aggiunta la possibilit\u00e0 di utilizzare il meccanismo di tracciamento hardware IPT (Intel Processor Trace), introdotto a partire dai CPU Intel Broadwell, per esportare dati dai sistemi guest a strumenti di debug in esecuzione lato host. Ad esempio, si possono utilizzare VMI Kernel Fuzzer o DRAKVUF Sandbox.\n<li class=\"l\"> \u00c8 stato aggiunto il supporto per gli ambienti Viridian (Hyper-V) per eseguire sistemi guest con Windows, utilizzando pi\u00f9 di 64 VCPU.\n<li class=\"l\"> \u00c8 stato modernizzato il layer PV Shim, utilizzato per eseguire sistemi guest paravirtualizzati (PV) non modificati in ambienti PVH e HVM (per garantire il funzionamento di sistemi guest obsoleti in ambienti pi\u00f9 sicuri che forniscono un'isolamento pi\u00f9 rigoroso). Nella nuova versione \u00e8 stato migliorato il supporto per l'avvio di sistemi guest PV in ambienti che supportano solo la modalit\u00e0 HVM. \u00c8 stata ridotta la dimensione del layer grazie alla diminuzione del codice specifico per HVM.\n<li class=\"l\"> Sono state ampliate le funzionalit\u00e0 dei driver VirtIO sui sistemi ARM. \u00c8 stata proposta un'implementazione per i sistemi ARM <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/server\/dts-los-angeles\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3700\">server<\/a> di IOREQ, che verr\u00e0 utilizzata in seguito per migliorare la virtualizzazione dell'input\/output utilizzando i protocolli VirtIO. \u00c8 stata aggiunta un'implementazione di riferimento di un dispositivo a blocchi VirtIO per ARM e fornita la possibilit\u00e0 di trasferire i dispositivi a blocchi VirtIO nei sistemi guest basati su architettura ARM. \u00c8 iniziato l'inclusione del supporto per la virtualizzazione PCIe per ARM.\n<li class=\"l\"> Continua il lavoro sull'implementazione del porting di Xen per i processori RISC-V. Attualmente \u00e8 in fase di sviluppo il codice per la gestione della memoria virtuale lato host e nei sistemi guest, oltre alla creazione di codice specifico per l'architettura RISC-V.\n<li class=\"l\"> Col progetto Zephyr, basato sullo standard MISRA_C, si sta sviluppando un insieme di requisiti e linee guida per la codifica che riducono i rischi di problemi di sicurezza. Per identificare eventuali discrepanze con le regole sviluppate vengono utilizzati analizzatori statici.\n<li class=\"l\"> \u00c8 stata presentata l'iniziativa Hyperlaunch, mirata a fornire strumenti flessibili per configurare l'avvio di un insieme statico <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/vps\/\"   title=\"macchine virtuali\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2049\">macchine virtuali<\/a> durante il caricamento del sistema. L'iniziativa propone il concetto di domB (boot domain, dom0less), che consente di avviare le macchine virtuali in una fase precoce del caricamento del server senza dover distribuire l'ambiente dom0.\n<li class=\"l\"> Nel sistema di integrazione continua \u00e8 stato garantito il testing di Xen su Alpine Linux e Ubuntu 20.04. \u00c8 stata interrotta la verifica di CentOS 6. Sono stati aggiunti test dom0 \/ domU basati su QEMU all'ambiente di integrazione continua per ARM.      <\/ul>\n<p>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=54949\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 \u0432\u043e\u0441\u044c\u043c\u0438 \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 4.15. \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, Bitdefender, Citrix \u0438 EPAM Systems. \u0412\u044b\u043f\u0443\u0441\u043a \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0439 \u0434\u043b\u044f \u0432\u0435\u0442\u043a\u0438 Xen 4.15 \u043f\u0440\u043e\u0434\u043b\u0438\u0442\u0441\u044f \u0434\u043e 8 \u043e\u043a\u0442\u044f\u0431\u0440\u044f 2022 \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 8 \u0430\u043f\u0440\u0435\u043b\u044f 2024 \u0433\u043e\u0434\u0430. \u041a\u043b\u044e\u0447\u0435\u0432\u044b\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0432 Xen 4.15: \u0412 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0430\u0445 Xenstored [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-99703","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - 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