{"id":103823,"date":"2022-04-20T09:36:41","date_gmt":"2022-04-20T07:36:41","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-emulyatora-qemu-7-0"},"modified":"2022-04-20T09:36:41","modified_gmt":"2022-04-20T07:36:41","slug":"vypusk-emulyatora-qemu-7-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/vypusk-emulyatora-qemu-7-0","title":{"rendered":"Rilascio dell'emulatore QEMU 7.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>\u00c8 stato rilasciato il progetto QEMU 7.0. Come emulatore, QEMU consente di eseguire un programma compilato per una piattaforma hardware su un sistema con un'architettura completamente diversa, ad esempio eseguire un'applicazione per ARM su un PC compatibile con x86. In modalit\u00e0 virtualizzazione, le prestazioni del codice in esecuzione in un ambiente isolato sono vicine a quelle di un sistema hardware grazie all'esecuzione diretta delle istruzioni sulla CPU e all'uso di un hypervisor Xen o del modulo KVM.       <\/p>\n<p>Il progetto \u00e8 stato inizialmente creato da Fabrice Bellard con l'obiettivo di consentire l'esecuzione di file eseguibili Linux compilati per la piattaforma x86 su architetture diverse da x86. Negli anni di sviluppo, \u00e8 stata aggiunta la supporto per l'emulazione completa di 14 architetture hardware, con oltre 400 dispositivi hardware emulati. Per la versione 7.0 sono stati effettuati pi\u00f9 di 2500 cambiamenti da 225 sviluppatori.     <\/p>\n<p>Miglioramenti chiave aggiunti in QEMU 7.0:   <\/p>\n<ul>\n<li class=\"l\"> Nell'emulatore dell'architettura x86 \u00e8 stata aggiunta la supporto per il set di istruzioni Intel AMX (Advanced Matrix Extensions), implementato nei processori server Intel Xeon Scalable. AMX offre nuovi registri configurabili TMM \u00abTILE\u00bb e istruzioni per manipolare i dati in questi registri, come TMUL (Tile matrix MULtiply) per la moltiplicazione di matrici.\n<li class=\"l\"> \u00c8 stata fornita la possibilit\u00e0 di registrare eventi ACPI dal sistema ospite tramite l'interfaccia ACPI ERST.\n<li class=\"l\"> Nel modulo virtiofs, utilizzato per il passaggio di parte del file system dell'ambiente host al sistema ospite, \u00e8 stato migliorato il supporto per le etichette di sicurezza. \u00c8 stata corretta la vulnerabilit\u00e0 CVE-2022-0358, che consentiva di elevare i propri privilegi nel sistema creando file eseguibili nelle directory passate tramite virtiofs, appartenenti a un'altra gruppo e dotate del flag SGID.\n<li class=\"l\"> \u00c8 aumentata la flessibilit\u00e0 del backup delle immagini di sistema attive in esecuzione (viene creato uno snapshot, quindi un filtro copy-before-write (CBW) \u00e8 applicato per aggiornare lo stato dello snapshot, copiando i dati dalle aree in cui il sistema ospite scrive). \u00c8 stata aggiunta la supporto per immagini nei formati diversi da qcow2. \u00c8 stata garantita la possibilit\u00e0 di accedere allo snapshot con il backup non direttamente, ma tramite il driver del dispositivo di blocco snapshot-access. Sono state ampliate le opzioni di gestione del funzionamento del filtro CBW, ad esempio, \u00e8 possibile escludere determinate bitmap dal trattamento.\n<li class=\"l\"> Nell'emulatore ARM per macchine 'virt' \u00e8 stata aggiunta la supporto per virtio-mem-pci, la definizione della topologia CPU per il sistema guest e l'attivazione di PAuth quando si utilizza un hypervisor. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/vps\/abuzoustojchivye-vps\/\"   title=\"KVM\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"4407\">KVM<\/a> con l'acceleratore hvf. Nell'emulatore delle schede 'xlnx-versal-virt' \u00e8 stata aggiunta la supporto per PMC SLCR e l'emulazione del controller di memoria Flash OSPI. Per le macchine emulate 'xlnx-zynqmp' sono stati aggiunti nuovi modelli di gestione CRF e APU. \u00c8 stata aggiunta l'emulazione delle estensioni FEAT_LVA2, FEAT_LVA (Large Virtual Address space) e FEAT_LPA (Large Physical Address space).\n<li class=\"l\"> Con il generatore di codice classico TCG (Tiny Code Generator) \u00e8 stata interrotta la supporto per gli host con CPU ARMv4 e ARMv5, che non supportano l'accesso alla memoria non allineato e hanno una quantit\u00e0 insufficiente di RAM per eseguire QEMU.\n<li class=\"l\"> Nell'emulatore dell'architettura RISC-V \u00e8 stata aggiunta la supporto per l'ipervisor KVM e implementate le estensioni vettoriali Vector 1.0, cos\u00ec come le istruzioni Zve64f, Zve32f, Zfhmin, Zfh, zfinx, zdinx e zhinx{min}. Per le macchine emulate 'spike' \u00e8 stata introdotta la supporto per il caricamento di file binari OpenSBI (RISC-V Supervisor Binary Interface). Per le macchine emulate 'virt' \u00e8 stata realizzata la possibilit\u00e0 di utilizzare fino a 32 core CPU e supporto AIA.\n<li class=\"l\"> Nell'emulatore dell'architettura HPPA \u00e8 stata fornita la possibilit\u00e0 di utilizzare fino a 16 vCPU e migliorato il driver grafico per ambienti utente HP-UX VDE\/CDE. \u00c8 stata aggiunta la possibilit\u00e0 di modificare l'ordine di avvio per i dispositivi SCSI.\n<li class=\"l\"> Nell'emulatore dell'architettura OpenRISC per le schede 'sim' \u00e8 stata aggiunta la supporto per l'uso di fino a 4 core CPU, il caricamento di un'immagine esterna initrd e la generazione automatica del device tree per il kernel caricato.\n<li class=\"l\"> Nell'emulatore dell'architettura PowerPC per le macchine emulate 'pseries' \u00e8 stata implementata la possibilit\u00e0 di avviare sistemi guest sotto la gestione di un ipervisor nidificato KVM. \u00c8 stata aggiunta la supporto per il dispositivo spapr-nvdimm. Per le macchine emulate 'powernv' \u00e8 stata introdotta la supporto per il controller delle interruzioni XIVE2 e i controller PHB5, migliorato il supporto per XIVE e PHB 3\/4.\n<li class=\"l\"> Nell'emulatore dell'architettura s390x \u00e8 stato aggiunto il supporto per le estensioni z15 (Miscellaneous-Instruction-Extensions Facility 3).    <\/ul>\n<p>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=57047\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u0440\u0435\u043b\u0438\u0437 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 QEMU 7.0. \u0412 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u044d\u043c\u0443\u043b\u044f\u0442\u043e\u0440\u0430 QEMU \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0437\u0430\u043f\u0443\u0441\u0442\u0438\u0442\u044c \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0443, \u0441\u043e\u0431\u0440\u0430\u043d\u043d\u0443\u044e \u0434\u043b\u044f \u043e\u0434\u043d\u043e\u0439 \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b, \u043d\u0430 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u0441 \u0441\u043e\u0432\u0435\u0440\u0448\u0435\u043d\u043d\u043e \u0438\u043d\u043e\u0439 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u043e\u0439, \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0435 \u0434\u043b\u044f ARM \u043d\u0430 x86-\u0441\u043e\u0432\u043c\u0435\u0441\u0442\u0438\u043c\u043e\u043c \u041f\u041a. \u0412 \u0440\u0435\u0436\u0438\u043c\u0435 \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u0432 QEMU \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043a\u043e\u0434\u0430 \u0432 \u0438\u0437\u043e\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u043c \u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u0438 \u0431\u043b\u0438\u0437\u043a\u0430 \u043a \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u0437\u0430 \u0441\u0447\u0451\u0442 \u043f\u0440\u044f\u043c\u043e\u0433\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u0438\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0438\u0439 \u043d\u0430 CPU \u0438 \u0437\u0430\u0434\u0435\u0439\u0441\u0442\u0432\u043e\u0432\u0430\u043d\u0438\u044f [&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-103823","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u0440\u0435\u043b\u0438\u0437 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 QEMU 7.0. \u0412 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u044d\u043c\u0443\u043b\u044f\u0442\u043e\u0440\u0430 QEMU \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0437\u0430\u043f\u0443\u0441\u0442\u0438\u0442\u044c \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0443, 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rilascio del progetto QEMU 7.0. 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