{"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\/pl\/blog\/news\/dlya-xen-razvivaetsya-mehanizm-paravirtualizaczii-iommu","title":{"rendered":"Dla Xen rozwijany jest mechanizm parawirtualizacji IOMMU","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Deweloperzy projektu XCP-NG, kt\u00f3ry rozwija otwart\u0105 platform\u0119 do wdra\u017cania i zarz\u0105dzania infrastruktur\u0105 chmurow\u0105, przedstawili projekt PV-IOMMU, umo\u017cliwiaj\u0105cy systemom go\u015bcinnym dost\u0119p do ograniczonej funkcjonalno\u015bci IOMMU, realizowanej z wykorzystaniem infrastruktury parawirtualizacji Xen. W praktyce PV-IOMMU mo\u017ce by\u0107 stosowane do wdra\u017cania ochrony DMA w Dom0 lub zapewnienia wsparcia dla podsystemu j\u0105dra Linux VFIO. Wcze\u015bniej hipernadzorca Xen u\u017cywa\u0142 IOMMU do przekazywania dost\u0119pu do urz\u0105dze\u0144 PCI i ograniczania dost\u0119pu urz\u0105dze\u0144 do pami\u0119ci, jednak z powod\u00f3w stabilno\u015bci i bezpiecze\u0144stwa systemy go\u015bcinne nie mog\u0142y bezpo\u015brednio odnosi\u0107 si\u0119 do dostarczonego sprz\u0119towego bloku IOMMU. <\/p>\n

IOMMU to specjalizowany blok zarz\u0105dzania pami\u0119ci\u0105, kt\u00f3ry t\u0142umaczy wirtualne adresy widoczne dla urz\u0105dzenia sprz\u0119towego na adresy fizyczne, umo\u017cliwiaj\u0105c wykonywanie i filtrowanie operacji DMA na wirtualnych adresach, a tak\u017ce ograniczanie i izolowanie operacji wej\u015bcia-wyj\u015bcia. W kontek\u015bcie wirtualizacji IOMMU pozwala systemom go\u015bci na bezpo\u015bredni dost\u0119p do urz\u0105dze\u0144 peryferyjnych, takich jak adaptery Ethernet, karty graficzne i kontrolery pami\u0119ci masowej. Implementacja IOMMU firmy Intel jest oferowana pod nazw\u0105 VT-d (Virtualization Technology for Directed I\/O), AMD \u2014 AMD-Vi (I\/O Virtualization), a ARM \u2014 SMMU (System Memory Management Unit). <\/p>\n

Proponowana parawirtualizowana implementacja (PV-IOMMU) pozwala systemom go\u015bcinnym korzysta\u0107 z podstawowych mo\u017cliwo\u015bci IOMMU, ale abstrahuje od wszelkich niskopoziomowych szczeg\u00f3\u0142\u00f3w sprz\u0119towych. Aby w\u0142\u0105czy\u0107 j\u0105 do sk\u0142adu Xen, zaproponowano nowy hipernadzorca (analog systemowego wywo\u0142ania dla hipernadzorc\u00f3w) HYPERVISOR_iommu_op, z kt\u00f3rego mog\u0105 korzysta\u0107 systemy go\u015bcinne do wykonywania operacji IOMMU. Mi\u0119dzy innymi, systemy go\u015bcinne mog\u0105 teraz tworzy\u0107 i modyfikowa\u0107 domeny<\/a> IOMMU (domena IOMMU), okre\u015blane w Xen jako konteksty IOMMU, aby unikn\u0105\u0107 zamieszania z terminem \u201edomena\u201d w Xen. Konteksty IOMMU pozwalaj\u0105 zorganizowa\u0107 dost\u0119p systemu go\u015bcia do pami\u0119ci urz\u0105dze\u0144 oraz definiowa\u0107 operacje t\u0142umaczenia pami\u0119ci stosowane do jednego lub kilku urz\u0105dze\u0144. <\/p>\n

Na obecnym etapie rozwoju w PV-IOMMU obs\u0142ugiwana jest tylko technologia Intel VT-d, ale wkr\u00f3tce planowane jest dodanie wsparcia dla AMD-Vi i SMMUv3.
\n
\u0179r\u00f3d\u0142o: 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\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\udd47Dla Xen rozwijany jest mechanizm parawirtualizacji IOMMU | 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