{"id":53931,"date":"2019-12-13T00:00:00","date_gmt":"2019-12-12T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/vypusk-emulyatora-qemu-4-2"},"modified":"2020-02-18T14:01:52","modified_gmt":"2020-02-18T11:01:52","slug":"vypusk-emulyatora-qemu-4-2","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hr\/blog\/news\/vypusk-emulyatora-qemu-4-2","title":{"rendered":"Izdanje emulatora QEMU 4.2","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/lists.nongnu.org\/archive\/html\/qemu-devel\/2019-12\/msg02579.html\">Predstavljen<\/a><\/noindex> izdanje projekta <noindex><a rel=\"nofollow\" href=\"http:\/\/wiki.qemu.org\/Download\">QEMU 4.2<\/a><\/noindex>. Kao emulator, QEMU omogu\u0107uje pokretanje programa sastavljenih za jednu hardversku platformu na sustavu s potpuno druga\u010dijom arhitekturom, na primjer, izvr\u0161avanje aplikacije za ARM na x86-kompatibilnom PC-u. U na\u010dinu virtualizacije, izvedba koda u izoliranom okru\u017eenju bliska je nativnim sustavima zahvaljuju\u0107i izravnom izvr\u0161avanju instrukcija na CPU-u i kori\u0161tenju hipervizora Xen ili KVM modula. <\/p>\n<p>Izvorno je projekt stvorio Fabrice Bellard s ciljem omogu\u0107ivanja pokretanja izvr\u0161nih datoteka Linuxa sastavljenih za x86 platformu na arhitekturama koje se razlikuju od x86. Tijekom godina razvoja dodana je podr\u0161ka za potpunu emulaciju za 14 hardverskih arhitektura, a broj emuliranih hardverskih ure\u0111aja prema\u0161io je 400. Za pripremu verzije 4.2 uvedeno je vi\u0161e od 2200 izmjena od 198 programera. <\/p>\n<p>Klju\u010dne <noindex><a rel=\"nofollow\" href=\"http:\/\/wiki.qemu.org\/ChangeLog\/4.2\">pobolj\u0161anja<\/a><\/noindex>, dodani u QEMU 4.2:\n<\/p>\n<ul>\n<li class=\"l\"> U klasi\u010dnom generatoru koda TCG (Tiny Code Generator) implementirana je podr\u0161ka za dodatke za pra\u0107enje procesorskih instrukcija i adresa u memoriji;\n<li class=\"l\">  U upravlja\u010dkom programu blok ure\u0111aja <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/qemu\/qemu\/blob\/master\/qemu-nbd.c\">NBD<\/a><\/noindex> (Network Block Device) osigurana je u\u010dinkovitija obrada zahtjeva za kopiranje prilikom \u010ditanja (copy-on-read). Kod NBD poslu\u017eitelja optimiziran je za kopiranje praznih slika (s prazninama). Uvedena su op\u0107a pobolj\u0161anja u implementaciji NBD klijenta i poslu\u017eitelja;\n<li class=\"l\"> Pove\u0107ana je izvedba \u0161ifriranja LUKS diskova kori\u0161tenjem algoritma AES-XTS;\n<li class=\"l\"> U vfio-pci dodana je podr\u0161ka za svojstvo \"failover_pair_id\" za olak\u0161avanje migracije VFIO ure\u0111aja;\n<li class=\"l\"> U virtio-mmio dodana je podr\u0161ka za standard virtio-compatible 2 i odre\u0111eni u specifikaciji virtio 1.1 mehanizam pakiranih virtualnih redova (<noindex><a rel=\"nofollow\" href=\"https:\/\/docs.oasis-open.org\/virtio\/virtio\/v1.1\/csprd01\/virtio-v1.1-csprd01.html#x1-230005\">virtqueue<\/a><\/noindex>) za razmjenu podataka s virtualnim ure\u0111ajem ulaza\/izlaza u paketu;\n<li class=\"l\"> U emulatoru arhitekture x86 dodan je novi tip emuliranih strojeva \"microvm\", koji koristi virtio-mmio umjesto PCI za optimizaciju performansi. Implementirana je opcija za uklju\u010divanje i isklju\u010divanje VMX putem oznaka \"-cpu\". Dodana je podr\u0161ka za emulaciju AVX512 BFloat16 instrukcija. Osigurana je podr\u0161ka za nove modele procesora Denverton (poslu\u017eiteljski SoC temeljen na Atomu), Snowridge i Dhyana. Stabilizirana je podr\u0161ka za macOS Hypervisor Framework (\"-accel hvf\");\n<li class=\"l\"> U emulatoru arhitekture ARM dodana je podr\u0161ka za emulaciju SoC Aspeed AST2600 (\"ast2600-evb\"). Dodana je podr\u0161ka za Semihosting 2.0 tehnologiju s pro\u0161irenjima STDOUT_STDERR\/EXIT_EXTENDED, koja omogu\u0107ava emuliranom ure\u0111aju kori\u0161tenje stdout, stderr i stdin za stvaranje datoteka na strani doma\u0107ina. U KVM dodana je mogu\u0107nost kori\u0161tenja vi\u0161e od 256 CPU-a i osigurana podr\u0161ka za SIMD instrukcije SVE. U virtualnim strojevima tipa \"<noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/qemu\/qemu\/blob\/master\/hw\/arm\/virt.c\">virt<\/a><\/noindex>\" implementirana je podr\u0161ka za vru\u0107e povezivanje memorije. Pove\u0107ane su performanse emulacije kori\u0161tenjem TCG generatora koda.\n<li class=\"l\"> U emulatoru arhitekture PowerPC pojavila se mogu\u0107nost emulacije POWER9 instrukcija mffsce, mffscrn i mffscrni. U emuliranim strojevima \"powernv\" dodana je podr\u0161ka za sustavne ure\u0111aje Homer i OCC SRAM;\n<li class=\"l\"> U emulatoru arhitekture RISC-V dodana je opcija \"-initrd\" i mogu\u0107nost pregleda potpunog stanja arhitekture u debageru;\n<li class=\"l\"> U emulatoru arhitekture s390 implementirana je podr\u0161ka za instrukcije IEP (Instruction Execution Protection);\n<li class=\"l\"> U emulator arhitekture 68k dodana je po\u010detna mogu\u0107nost emulacije Macintosh Quadro 800 i klasi\u010dnih sustava NeXTcube;\n<li class=\"l\"> U emulatoru arhitekture xtensa dodan je novi tip emuliranih strojeva \"virt\" i implementirana je podr\u0161ka za ABI call0 za emulaciju u korisni\u010dkom prostoru.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Izvor: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52023\">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 4.2. \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-53931","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - 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.\" \/>\n\t<meta name=\"robots\" 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