{"id":115180,"date":"2024-04-19T14:30:12","date_gmt":"2024-04-19T12:30:12","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/dlya-xen-razvivaetsya-mehanizm-paravirtualizaczii-iommu"},"modified":"2024-04-19T14:30:12","modified_gmt":"2024-04-19T12:30:12","slug":"dlya-xen-razvivaetsya-mehanizm-paravirtualizaczii-iommu","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hr\/blog\/news\/dlya-xen-razvivaetsya-mehanizm-paravirtualizaczii-iommu","title":{"rendered":"Za Xen se razvija mehanizam para-virtualizacije IOMMU","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Programeri projekta XCP-NG, koji razvija slobodnu platformu za implementaciju i upravljanje oblacima, predstavili su projekt PV-IOMMU, koji omogu\u0107ava gostuju\u0107im sustavima pristup ograni\u010denoj funkcionalnosti IOMMU, implementiranoj kori\u0161tenjem infrastrukture para-virtualizacije Xen. U praksi, PV-IOMMU se mo\u017ee koristiti za implementaciju za\u0161tite DMA u Dom0 ili za osiguranje podr\u0161ke za Linux VFIO potpod sustav. Ranije je hipervizor Xen koristio IOMMU za propu\u0161tanje pristupa PCI ure\u0111ajima i ograni\u010davanje pristupa ure\u0111aja memoriji, ali iz razloga stabilnosti i sigurnosti gostuju\u0107i sustavi nisu mogli izravno pristupiti IOMMU bloku koji pru\u017ea oprema. <\/p>\n

IOMMU je specijalizirana jedinica za upravljanje memorijom koja izvr\u0161ava prevo\u0111enje virtualnih adresa, vidljivih hardveru, u fizi\u010dke adrese, omogu\u0107uju\u0107i izvo\u0111enje i filtriranje DMA operacija po virtualnim adresama, kao i ograni\u010davanje i izolaciju ulazno-izlaznih operacija. U kontekstu virtualizacije, IOMMU omogu\u0107ava gostuju\u0107im sustavima direktan pristup perifernim ure\u0111ajima, poput Ethernet adaptera, grafi\u010dkih kartica i kontrolera za pohranu podataka. Implementacija IOMMU od strane Intela nosi naziv VT-d (\u201eTehnologija virtualizacije za usmjerenu ulazno-izlaznu operaciju\u201c), AMD-ova verzija je AMD-Vi (virtualizacija ulazno-izlaznih operacija), dok ARM koristi SMMU (jedinica za upravljanje sistemskom memorijom). <\/p>\n

Predlo\u017eena para-virtualizirana implementacija (PV-IOMMU) omogu\u0107ava gostuju\u0107im sustavima kori\u0161tenje osnovnih mogu\u0107nosti IOMMU-a, ali pritom apstrahira sve niske hardverske detalje. Za uklju\u010divanje u Xen predlo\u017een je novi hipervizor (analog sustavnog poziva za hipervizore) HYPERVISOR_iommu_op, koji mogu koristiti gostuju\u0107i sustavi za izvo\u0111enje IOMMU operacija. Izme\u0111u ostalog, gostuju\u0107i sustavi sada mogu stvarati i mijenjati domene<\/a> IOMMU (IOMMU domena) se u Xen-u nazivaju IOMMU kontekstima kako bi se izbjegla zabuna s pojmom \u201edomena\u201c u Xen-u. IOMMU konteksti omogu\u0107avaju organiziranje pristupa gostuju\u0107eg sustava memoriji ure\u0111aja i definiranje operacija prevo\u0111enja memorije koje se primjenjuju na jedan ili vi\u0161e ure\u0111aja. <\/p>\n

U trenutnoj fazi razvoja, PV-IOMMU podr\u017eava samo Intel VT-d tehnologiju, ali u skoroj budu\u0107nosti planira se dodati podr\u0161ka za AMD-Vi i SMMUv3.
\n
Izvor: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 XCP-NG, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u044e\u0449\u0435\u0433\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u0443\u044e \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0443 \u0434\u043b\u044f \u0440\u0430\u0437\u0432\u0435\u0440\u0442\u044b\u0432\u0430\u043d\u0438\u044f \u0438 \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0440\u0430\u0431\u043e\u0442\u043e\u0439 \u043e\u0431\u043b\u0430\u0447\u043d\u043e\u0439 \u0438\u043d\u0444\u0440\u0430\u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u043e\u0439, \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u043b\u0438 \u043f\u0440\u043e\u0435\u043a\u0442 PV-IOMMU, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0439 \u0433\u043e\u0441\u0442\u0435\u0432\u044b\u043c \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u043c \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u0434\u043e\u0441\u0442\u0443\u043f \u043a \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u043d\u043e\u0439 \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u0438 IOMMU, \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u043e\u0439 \u0441 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c \u0438\u043d\u0444\u0440\u0430\u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u044b \u043f\u0430\u0440\u0430\u0432\u0438\u0440\u0442\u0443\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 Xen. \u041d\u0430 \u043f\u0440\u0430\u043a\u0442\u0438\u043a\u0435 PV-IOMMU \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0442\u044c\u0441\u044f \u0434\u043b\u044f \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u0437\u0430\u0449\u0438\u0442\u044b DMA \u0432 Dom0 \u0438\u043b\u0438 \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u044b \u044f\u0434\u0440\u0430 Linux VFIO. \u0420\u0430\u043d\u0435\u0435 \u0433\u0438\u043f\u0435\u0440\u0432\u0438\u0437\u043e\u0440 Xen \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043b IOMMU \u0434\u043b\u044f […]<\/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-115180","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Za Xen se razvija mehanizam paravirtualizacije IOMMU | 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