{"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\/cs\/blog\/news\/vypusk-emulyatora-qemu-4-2","title":{"rendered":"Vyd\u00e1n\u00ed emul\u00e1toru 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\">P\u0159edstaven\u00ed<\/a><\/noindex> uvoln\u011bn\u00ed projektu <noindex><a rel=\"nofollow\" href=\"http:\/\/wiki.qemu.org\/Download\">QEMU 4.2<\/a><\/noindex>. Jako emul\u00e1tor QEMU umo\u017e\u0148uje spustit program sestaven\u00fd pro jednu hardwarovou platformu na syst\u00e9mu s \u00fapln\u011b jinou architekturou, nap\u0159\u00edklad spustit aplikaci pro ARM na po\u010d\u00edta\u010di kompatibiln\u00edm s x86. V re\u017eimu virtualizace m\u00e1 QEMU v\u00fdkon k\u00f3du b\u011b\u017e\u00edc\u00edho v izolovan\u00e9m prost\u0159ed\u00ed bl\u00edzk\u00fd nativn\u00edmu syst\u00e9mu d\u00edky p\u0159\u00edm\u00e9mu vykon\u00e1v\u00e1n\u00ed instrukc\u00ed na CPU a zapojen\u00ed hypervisoru Xen nebo modulu KVM. <\/p>\n<p>Projekt byl p\u016fvodn\u011b vytvo\u0159en Fabricem Bellardem s c\u00edlem umo\u017enit spou\u0161t\u011bn\u00ed textov\u00fdch soubor\u016f Linux ur\u010den\u00fdch pro platformu x86 na architektur\u00e1ch odli\u0161n\u00fdch od x86. B\u011bhem let v\u00fdvoje byla p\u0159id\u00e1na podpora pln\u00e9 emulace pro 14 hardwarov\u00fdch architektur a po\u010det emulovan\u00fdch hardwarov\u00fdch za\u0159\u00edzen\u00ed p\u0159es\u00e1hl 400. P\u0159i p\u0159\u00edprav\u011b verze 4.2 bylo provedeno v\u00edce ne\u017e 2200 zm\u011bn od 198 v\u00fdvoj\u00e1\u0159\u016f. <\/p>\n<p>Kl\u00ed\u010dov\u00e9 <noindex><a rel=\"nofollow\" href=\"http:\/\/wiki.qemu.org\/ChangeLog\/4.2\">vylep\u0161en\u00ed<\/a><\/noindex>, kter\u00e9 byly p\u0159id\u00e1ny do QEMU 4.2:\n<\/p>\n<ul>\n<li class=\"l\"> Ve klasick\u00e9m gener\u00e1toru k\u00f3du TCG (Tiny Code Generator) byla implementov\u00e1na podpora plugin\u016f pro sledov\u00e1n\u00ed instrukc\u00ed procesoru a adres v pam\u011bti;\n<li class=\"l\">  V ovlada\u010di blokov\u00fdch za\u0159\u00edzen\u00ed <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/qemu\/qemu\/blob\/master\/qemu-nbd.c\">NBD<\/a><\/noindex> (Network Block Device) byla zaji\u0161t\u011bna efektivn\u011bj\u0161\u00ed spr\u00e1va po\u017eadavk\u016f na kop\u00edrov\u00e1n\u00ed p\u0159i \u010dten\u00ed (copy-on-read). K\u00f3d NBD serveru byl optimalizov\u00e1n pro kop\u00edrov\u00e1n\u00ed sparse obraz\u016f (s pr\u00e1zdn\u00fdmi oblastmi). Byla provedena obecn\u00e1 zlep\u0161en\u00ed v realizaci klienta a serveru NBD;\n<li class=\"l\"> Byla zv\u00fd\u0161ena v\u00fdkonnost \u0161ifrov\u00e1n\u00ed disk\u016f LUKS s pou\u017eit\u00edm algoritmu AES-XTS;\n<li class=\"l\"> Ve vfio-pci byla p\u0159id\u00e1na podpora vlastnosti \u201efailover_pair_id\u201c pro usnadn\u011bn\u00ed migrace za\u0159\u00edzen\u00ed VFIO;\n<li class=\"l\"> Ve virtio-mmio byla p\u0159id\u00e1na podpora standardu virtio-compatible 2 a specifikovan\u00e9ho mechanismu zabalen\u00fdch virtu\u00e1ln\u00edch front (<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>) pro v\u00fdm\u011bnu dat s virtu\u00e1ln\u00edm za\u0159\u00edzen\u00edm vstupu\/v\u00fdstupu v d\u00e1vkov\u00e9m re\u017eimu;\n<li class=\"l\"> V emul\u00e1toru architektury x86 byl p\u0159id\u00e1n nov\u00fd typ emulovan\u00fdch stroj\u016f \u201emicrovm\u201c, kter\u00e9 pou\u017e\u00edvaj\u00ed virtio-mmio m\u00edsto PCI pro optimalizaci v\u00fdkonu. Byla implementov\u00e1na mo\u017enost zap\u00edn\u00e1n\u00ed a vyp\u00edn\u00e1n\u00ed VMX prost\u0159ednictv\u00edm p\u0159\u00edznak\u016f \u201e-cpu\u201c. Byla p\u0159id\u00e1na podpora emulace roz\u0161\u00ed\u0159en\u00ed AVX512 BFloat16. Zaji\u0161t\u011bna podpora nov\u00fdch model\u016f CPU Denverton (serverov\u00fd SoC na b\u00e1zi Atom), Snowridge a Dhyana. Byla stabilizov\u00e1na podpora macOS Hypervisor Framework (\u201e-accel hvf\u201c);\n<li class=\"l\"> V emul\u00e1toru architektury ARM byla p\u0159id\u00e1na podpora emulace SoC Aspeed AST2600 (\u201east2600-evb\u201c). Byla p\u0159id\u00e1na podpora technologie Semihosting 2.0 s roz\u0161\u00ed\u0159en\u00edmi STDOUT_STDERR\/EXIT_EXTENDED, kter\u00e1 umo\u017e\u0148uje emulovan\u00e9mu za\u0159\u00edzen\u00ed pou\u017e\u00edvat stdout, stderr a stdin pro vytv\u00e1\u0159en\u00ed soubor\u016f na stran\u011b hostitele. V KVM byla p\u0159id\u00e1na mo\u017enost pou\u017eit\u00ed v\u00edce ne\u017e 256 CPU a byla zaji\u0161t\u011bna podpora SIMD instrukc\u00ed SVE. Ve virtu\u00e1ln\u00edch stroj\u00edch s typem \u201e<noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/qemu\/qemu\/blob\/master\/hw\/arm\/virt.c\">virt<\/a><\/noindex>\u201c byla realizov\u00e1na podpora hork\u00e9ho p\u0159ipojen\u00ed pam\u011bti. Byla zv\u00fd\u0161ena v\u00fdkonnost emulace pomoc\u00ed gener\u00e1toru k\u00f3du TCG.\n<li class=\"l\"> V emul\u00e1toru architektury PowerPC byla p\u0159id\u00e1na mo\u017enost emulace POWER9 instrukc\u00ed mffsce, mffscrn a mffscrni. V emulovan\u00fdch stroj\u00edch \u201epowernv\u201c byla p\u0159id\u00e1na podpora syst\u00e9mov\u00fdch za\u0159\u00edzen\u00ed Homer a OCC SRAM;\n<li class=\"l\"> V emul\u00e1toru architektury RISC-V byla p\u0159id\u00e1na mo\u017enost \u201e-initrd\u201c a mo\u017enost zobrazen\u00ed \u00fapln\u00e9ho stavu architektury v ladic\u00edm programu;\n<li class=\"l\"> V emul\u00e1toru architektury s390 byla implementov\u00e1na podpora instrukc\u00ed IEP (Instruction Execution Protection);\n<li class=\"l\"> V emul\u00e1toru architektury 68k byla p\u0159id\u00e1na po\u010d\u00e1te\u010dn\u00ed podpora emulace Macintosh Quadro 800 a klasick\u00fdch syst\u00e9m\u016f NeXTcube;\n<li class=\"l\"> V emul\u00e1toru architektury xtensa byl p\u0159id\u00e1n nov\u00fd typ emulovan\u00fdch stroj\u016f \u201evirt\u201c a byla realizov\u00e1na podpora ABI call0 pro emulaci v u\u017eivatelsk\u00e9m prostoru.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Zdroj: <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 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d 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