{"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\/et\/blog\/news\/dlya-xen-razvivaetsya-mehanizm-paravirtualizaczii-iommu","title":{"rendered":"Xen is developing a paravirtualization mechanism for IOMMU.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

XCP-NG projekti arendajad, kes loovad avatud platvormi pilveinfrastruktuuri juurutamiseks ja haldamiseks, esitlesid PV-IOMMU projekti, mis v\u00f5imaldab k\u00fclg-s\u00fcsteemidel kasutada piiratud IOMMU funktsioone, rakendades Xen'i paravirtuaalset infrastruktuuri. Praktikas saab PV-IOMMU-d kasutada DMA kaitse rakendamiseks Dom0-s v\u00f5i Linuxi tuuma VFIO alams\u00fcsteemi toe tagamiseks. Varem kasutas Xen h\u00fcperviisor IOMMU-d PCI-seadmete juurdep\u00e4\u00e4su edastamiseks ja seadmete juurdep\u00e4\u00e4su piiramiseks m\u00e4lule, kuid stabiilsuse ja turvalisuse kaalutlustel ei saanud k\u00fclgs\u00fcsteemid otse IOMMU-p\u00f5hisesse seadmesse saadud juurdep\u00e4\u00e4su kasutada. <\/p>\n

IOMMU on spetsialiseeritud m\u00e4lu juhtimisseade, mis teostab f\u00fc\u00fcsiliste aadresside t\u00f5lget, mida riistvara seadmed n\u00e4evad virtuaalsete aadresside kaudu. See v\u00f5imaldab DMA-operatsioonide teostamist ja filtreerimist virtuaalsete aadresside p\u00f5hjal ning piirata ja isoleerida sisendi- ja v\u00e4ljundioperatsioone. Virtuaalituse kontekstis v\u00f5imaldab IOMMU k\u00fclg s\u00fcsteemidel otse suhelda perifeersete seadmetega, nagu Ethernet-adapterid, graafikakaardid ja salvestusseadmete kontrollerid. Intel'i IOMMU rakendust tuntakse nime all VT-d (\u201eVirtualization Technology for Directed I\/O\u201d), AMD-l on see m\u00e4\u00e4ratletud kui AMD-Vi (I\/O Virtualization) ning ARM-i puhul SMMU (System Memory Management Unit). <\/p>\n

Pakutud paravirtuaalne teostus (PV-IOMMU) v\u00f5imaldab k\u00fclgs\u00fcsteemidel kasutada IOMMU p\u00f5hiomadusi, kuid abstraheerib k\u00f5ik madala taseme riistvaradetailid. Xen'i koostamisel on ette n\u00e4htud uus h\u00fcperk\u00e4sk (sarnane s\u00fcsteemi kutsuva funktsiooni h\u00fcperviisoris) HYPERVISOR_iommu_op, mida k\u00fclgs\u00fcsteemid saavad kasutada IOMMU toimingute sooritamiseks. Muuhulgas saavad k\u00fclgs\u00fcsteemid n\u00fc\u00fcd luua ja muuta domeenid<\/a> IOMMU (IOMMU domeen), mida Xen'is nimetatakse IOMMU kontekstideks, et v\u00e4ltida segadust terminiga \u201edomeen\u201d Xen'is. IOMMU kontekstid v\u00f5imaldavad korraldada k\u00fclg s\u00fcsteemi juurdep\u00e4\u00e4su seadmete m\u00e4lu ning m\u00e4\u00e4rata m\u00e4lut\u00f5lke operatsioonid, mida rakendatakse \u00fchele v\u00f5i mitmele seadmele. <\/p>\n

Praeguses arenguetapis toetab PV-IOMMU ainult Intel VT-d tehnoloogiat, kuid peagi on plaanis lisada AMD-Vi ja SMMUv3 toe.
\n
Allikas: 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\udd47 Xeni paraarvutuse IOMMU mehhanism on arengus | ProHoster","description":"XCP-NG 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