{"id":32296,"date":"2019-10-31T21:46:12","date_gmt":"2019-10-31T18:46:12","guid":{"rendered":"https:\/\/prohoster.info\/blog\/vypusk-emulyatora-qemu-4-0\/"},"modified":"2019-10-31T21:46:12","modified_gmt":"2019-10-31T18:46:12","slug":"vypusk-emulyatora-qemu-4-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/vypusk-emulyatora-qemu-4-0","title":{"rendered":"Lansarea emulatorului QEMU 4.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"http:\/\/lists.nongnu.org\/archive\/html\/qemu-devel\/2019-04\/msg03851.html\">Generat<\/a><\/noindex>  lansarea proiectului <noindex><a rel=\"nofollow\" href=\"http:\/\/wiki.qemu.org\/Download\">QEMU 4.0<\/a><\/noindex>. Ca emulator, QEMU permite rularea unei aplica\u021bii compilate pentru o platform\u0103 hardware pe un sistem cu o arhitectur\u0103 complet diferit\u0103, de exemplu, executarea unei aplica\u021bii pentru ARM pe un PC compatibil x86. \u00cen modul de virtualizare, performan\u021ba execut\u0103rii codului \u00eentr-un mediu izolat este apropiat\u0103 de cea a unui sistem nativ datorit\u0103 execut\u0103rii directe a instruc\u021biunilor pe CPU \u0219i folosirii hipervizorului Xen sau a modulului KVM. <\/p>\n<p>Ini\u021bial, proiectul a fost creat de Fabrice Bellard cu scopul de a permite rularea fi\u0219ierelor executabile Linux compilate pentru platforma x86 pe arhitecturi diferite de x86. De-a lungul anilor de dezvoltare, suportul pentru emularea complet\u0103 a fost extins pentru 14 arhitecturi hardware, num\u0103rul dispozitivelor hardware emulate a dep\u0103\u0219it 400. Pentru versiunea 4.0, au fost aduse mai mult de 3100 de modific\u0103ri de la 220 de dezvoltatori. <\/p>\n<p>Principalele <noindex><a rel=\"nofollow\" href=\"http:\/\/wiki.qemu.org\/ChangeLog\/4.0\">\u00eembun\u0103t\u0103\u021biri<\/a><\/noindex>, ad\u0103ugate \u00een QEMU 4.0: <\/p>\n<ul>\n<li class=\"l\"> \u00cen emulatorul arhitecturii ARM a fost ad\u0103ugat suport pentru extensiile de instruc\u021biuni ARMv8+: SB, PredInv, HPD, LOR, FHM, AA32HPD,<br \/>\n   PAuth, JSConv, CondM, FRINT \u0219i BTI. A fost ad\u0103ugat\u0103 suport pentru emularea pl\u0103cilor \u201eMusca\u201d \u0219i \u201eMPS2\u201d. A fost \u00eembun\u0103t\u0103\u021bit\u0103 emularea ARM PMU (Unitate de gestionare a energiei). Pe platform\u0103 <noindex><a rel=\"nofollow\" href=\"https:\/\/wiki.qemu.org\/Documentation\/Platforms\/ARM#Generic_ARM_system_emulation_with_the_virt_machine\">virt<\/a><\/noindex> a fost ad\u0103ugat\u0103 posibilitatea utiliz\u0103rii a peste 255 GB de RAM \u0219i suport pentru imagini u-boot de tip \u201enoload\u201d;<\/p>\n<li class=\"l\"> \u00cen emulatorul arhitecturii x86, \u00een motorul de accelerare a virtualiz\u0103rii <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/intel\/haxm\">HAX<\/a><\/noindex> (Intel Hardware Accelerated Execution) a fost ad\u0103ugat suport pentru gazde compatibile POSIX, cum ar fi Linux \u0219i NetBSD (anterior era acceptat\u0103 doar platforma Darwin). \u00cen emulatorul chipset-ului Q35 (ICH9) pentru porturile PCIe principale, acum poate fi op\u021bional declarat\u0103 viteza maxim\u0103 (16GT\/s) \u0219i num\u0103rul de linii de conexiune (x32), definite \u00een specifica\u021bia PCIe 4.0 (pentru a asigura compatibilitate implicit\u0103, pentru tipurile mai vechi de ma\u0219ini QEMU este setat la 2.5GT\/s \u0219i x1). S-a asigurat posibilitatea de a \u00eenc\u0103rca imagini Xen PVH cu op\u021biunea \u201e-kernel\u201d;\n<li class=\"l\"> \u00cen emulatorul arhitecturii MIPS a fost ad\u0103ugat suport pentru emularea multithread cu utilizarea generatorului de cod clasic TCG (Tiny Code Generator). De asemenea, a fost ad\u0103ugat suport pentru emularea CPU I7200 (nanoMIPS32 ISA) \u0219i I6500 (MIPS64R6 ISA), capacitatea de a gestiona cererile de tip CPU folosind protocolul QMP (QEMU Management Protocol), a fost ad\u0103ugat\u0103 suport pentru registrele de configurare SAARI \u0219i SAAR. A fost \u00eembun\u0103t\u0103\u021bit\u0103 func\u021bionarea ma\u0219inilor virtuale de tip Fulong 2E. A fost actualizat\u0103 implementarea Interthread Communication Unit;\n<li class=\"l\"> \u00cen emulatorul arhitecturii PowerPC a fost ad\u0103ugat suport pentru emularea controlerului de \u00eentrerupere XIVE, extins suportul pentru POWER9, pentru seria P a fost ad\u0103ugat\u0103 posibilitatea de conectare la cald a podurilor principale PCI (PHB, PCI host bridge). A fost activat\u0103 din start protec\u021bia \u00eempotriva atacurilor Spectre \u0219i Meltdown;\n<li class=\"l\">  \u00cen emulatorul arhitecturii RISC-V a fost ad\u0103ugat suport pentru emularea PCI \u0219i USB. \u00cen serverul de depanare \u00eencorporat (gdbserver) a fost implementat suportul pentru setarea listelor de registre \u00een fi\u0219iere XML. A fost ad\u0103ugat suport pentru c\u00e2mpurile mstatus TSR, TW \u0219i TVM;\n<li class=\"l\"> \u00cen emulatorul arhitecturii s390 a fost ad\u0103ugat\u0103 suport pentru modelul CPU z14 GA 2, precum \u0219i suport pentru simularea extensiilor instruc\u021biunilor pentru calcule cu virgul\u0103 mobil\u0103 \u0219i opera\u021bii vectoriale. \u00cen vfio-ap a fost ad\u0103ugat\u0103 posibilitatea de conectare la cald a dispozitivelor;\n<li class=\"l\"> \u00cen emulatorul procesoarelor din familia Tensilica Xtensa a fost \u00eembun\u0103t\u0103\u021bit\u0103 suportul SMP pentru Linux \u0219i a fost ad\u0103ugat\u0103 suport pentru extensia FLIX (Flexibil length instructions extension);\n<li class=\"l\"> \u00cen interfa\u021ba grafic\u0103 a fost ad\u0103ugat\u0103 op\u021biunea \u2018-display spice-app\u2019 pentru configurarea \u0219i lansarea variantei clientului de acces la distan\u021b\u0103 Spice cu un design similar cu interfa\u021ba GTK a QEMU;\n<li class=\"l\"> \u00cen implementarea serverului VNC a fost ad\u0103ugat\u0103 suport pentru controlul accesului prin op\u021biunile tls-authz\/sasl-authz;\n<li class=\"l\"> \u00cen QMP (QEMU Management Protocol) a fost ad\u0103ugat\u0103 suport pentru executarea centralizat\u0103\/extern\u0103 (Out-of-band) a comenzilor \u0219i au fost implementate comenzi suplimentare pentru lucrul cu dispozitivele bloc;\n<li class=\"l\"> \u00cen VFIO a fost ad\u0103ugat implementarea interfe\u021bei EDID pentru mdev suportat (Intel vGPU), permi\u021b\u00e2nd schimbarea rezolu\u021biei ecranului, folosind op\u021biunile xres \u0219i yres;\n<li class=\"l\"> Pentru Xen a fost ad\u0103ugat un nou dispozitiv \u2018xen-disk\u2019, care poate crea singur un backend de disc pentru Xen PV (f\u0103r\u0103 a apela la xenstore). A fost crescut\u0103 performan\u021ba backend-ului de disc pentru Xen PV \u0219i a fost ad\u0103ugat\u0103 posibilitatea de a modifica dimensiunea discului;\n<li class=\"l\"> \u00cen dispozitivele de blocare de re\u021bea au fost extinse capacit\u0103\u021bile de diagnosticare \u0219i de urm\u0103rire, a fost \u00eembun\u0103t\u0103\u021bit\u0103 compatibilitatea clientului cu realiz\u0103rile problematice ale serverului NBD. \u00cen qemu-nbd au fost ad\u0103ugate op\u021biunile \u2018--bitmap\u2019, \u2018--list\u2019 \u0219i \u2018--tls-authz\u2019;\n<li class=\"l\"> \u00cen dispozitivul emulat IDE\/via a fost ad\u0103ugat suport pentru modul PCI IDE;\n<li class=\"l\"> A fost ad\u0103ugat suport pentru utilizarea algoritmului lzfse pentru comprimarea imaginilor dmg. Pentru formatul qcow2 a fost ad\u0103ugat\u0103 suportul pentru conectarea fi\u0219ierelor externe cu date. Opera\u021biile de decomprimare qcow2 au fost mutate \u00eentr-un fir de execu\u021bie separat. \u00cen imaginile vmdk a fost ad\u0103ugat suportul pentru opera\u021bia \u2018blockdev-create\u2019;\n<li class=\"l\"> \u00cen dispozitivul bloc virtio-blk a fost ad\u0103ugat suport pentru opera\u021biile DISCARD (informarea despre eliberarea blocurilor) \u0219i WRITE_ZEROES (rescrierea unei game de blocuri logice);\n<li class=\"l\"> \u00cen dispozitivul pvrdma a fost implementat suport pentru RDMA Management Datagram services (MAD);\n<li class=\"l\"> Au fost introduse <noindex><a rel=\"nofollow\" href=\"https:\/\/wiki.qemu.org\/ChangeLog\/4.0#Incompatible_changes\">modific\u0103ri<\/a><\/noindex>, care \u00eencalc\u0103 compatibilitatea invers\u0103. De exemplu, \u00een loc de op\u021biunea \u2018handle\u2019 din \u2018-fsdev\u2019 \u0219i \u2018-virtfs\u2019 ar trebui folosite op\u021biunile \u2018local\u2019 sau \u2018proxy\u2019. Au fost eliminate op\u021biunile \u2018-virtioconsole\u2019 (\u00eenlocuit\u0103 cu \u2018-device virtconsole\u2019), \u2018-no-frame\u2019, \u2018-clock\u2019, \u2018-enable-hax\u2019 (\u00eenlocuit\u0103 cu \u2018-accel hax\u2019). Dispozitivul \u2018ivshmem\u2019 a fost eliminat (ar trebui folosit \u2018ivshmem-doorbell\u2019 sau \u2018ivshmem-plain\u2019). Suportul pentru compilarea cu SDL1.2 a fost terminat (trebuie folosit SDL2).\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Sursa: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=50567\">opennet.ro<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0421\u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 QEMU 4.0. \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 \u043d\u0430\u0442\u0438\u0432\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-32296","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2.1 - aioseo.com -->\n\t<meta name=\"description\" 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