{"id":95507,"date":"2020-09-30T13:42:18","date_gmt":"2020-09-30T11:42:18","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-gipervizore-xen-realizovana-podderzhka-platy-raspberry-pi-4"},"modified":"2020-09-30T13:42:18","modified_gmt":"2020-09-30T11:42:18","slug":"v-gipervizore-xen-realizovana-podderzhka-platy-raspberry-pi-4","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/v-gipervizore-xen-realizovana-podderzhka-platy-raspberry-pi-4","title":{"rendered":"H\u00fcpervisor Xenis on toetatud Raspberry Pi 4 plaati","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Projekti Xen arendajad et neil on alles ainult kaks plokki \/8.<\/a><\/noindex> on rakenduse Xen Hypervisor kasutamise v\u00f5imaluse mateeria Raspberry Pi 4 plaatidel teostamisel. Xen-i kohandamine t\u00f6\u00f6tamiseks varasemate Raspberry Pi plaatide variantidega takistas mittestandardne katkestuste kontroller, mis ei toetanud virtualiseerimist. Raspberry Pi 4-l rakendati tavaline katkestuste kontroller GIC-400, mida Xen toetab, ja arendajad lootsid, et Xen-i k\u00e4ivitamisel probleeme ei esine. Kuid tegelikkuses ei osutunud k\u00f5ik nii lihtsaks ning Xen-i t\u00f6\u00f6tamiseks Raspberry Pi 4-l tuli teha olulisi muutusi m\u00e4lu k\u00e4sitlemise koodis.<\/p>\n

Esimese Raspberry Pi 4 versiooni platvormide puhul oli p\u00e4\u00e4s piiratud ainult esimese gigabaidi m\u00e4lu aadressiruumi, mida Dom0 jaoks ei piisanud. Vajalikud muudatused tehti Xen 4.14 v\u00e4ljalaskes, kuid kohe kerkis esile teine probleem \u2014 Xen-i alamprogramm virtualiseerivate aadresside f\u00fc\u00fcsilisteks muutmiseks kasutas virt_to_phys kutset, mis ei t\u00f6\u00f6tanud k\u00f5igi virtuaalsete aadresside puhul ja katsetamine m\u00f5nede virtuaalsete aadresside konversioonidega l\u00f5ppes veaga. Selle probleemi lahendamiseks tuli lisada teine aadresside konverteerimise funktsioon.<\/p>\n

Sellega probleemid ei piirdu ja esile kerkis DMA t\u00f6\u00f6 erip\u00e4ra \u2014 k\u00f5igil varasemalt toetatud Xen platvormidel (x86, ARM ja ARM64) kattusid DMA aadressid ja f\u00fc\u00fcsilised aadressid alati, kuid Raspberry Pi 4 puhul need ei kattunud. Selle probleemi lahendamine osutus k\u00f5ige keerulisemaks ja n\u00f5udis Linuxi tuuma plaastrite arendamist, mis teostavad konverteerimist f\u00fc\u00fcsiliste aadresside ja DMA aadresside vahel. <\/p>\n

Valmistatud parandused on sisse viidud Linuxi tuumasse 5.9 ja n\u00fc\u00fcd on Xen tunnustatud virtuaalprotsesside korraldamiseks Raspberry Pi 4 plaatidel. Sealhulgas on Raspberry Pi 4-l n\u00fc\u00fcd v\u00f5imalik kasutada EVE<\/a><\/noindex> (Edge Virtualization Engine), pilvep\u00f5histe rakenduste loomise ja k\u00e4itamise mootor, mis kasutab Xen-i, Linuxkit<\/a><\/noindex> ja Alpine Linux<\/a><\/noindex> virtuaalprotsesside infrastruktuuri ehitamiseks kaasaskantavates seadmetes.<\/p>\n

Lisaks v\u00f5ib m\u00e4rkida 10 haavatavuse<\/a><\/noindex> Xen-is. Haavatavused CVE-2020-25599<\/a><\/noindex>,
\nCVE-2020-25603<\/a><\/noindex> ja
\nCVE-2020-25595<\/a><\/noindex>
\n v\u00f5ivad v\u00f5imaldada k\u00fclalis\u00fcsteemil saada host-keskkonna privileege. Probleemid
\nCVE-2020-25601<\/a><\/noindex>, CVE-2020-25600<\/a><\/noindex>,
\nCVE-2020-25596<\/a><\/noindex>,
\nCVE-2020-25597<\/a><\/noindex>,
\nCVE-2020-25604<\/a><\/noindex>,
\nCVE-2020-25598<\/a><\/noindex> ja
\nCVE-2020-25602<\/a><\/noindex>
\non piiratud teenuse tagamise keelamisega.<\/p>\n

<\/a><\/noindex><\/p>\n

Allikas: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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[…]<\/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-95507","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\udd47Xen h\u00fcpervisor toetab Raspberry Pi 4 plaati | ProHoster","description":"Xen projekti arendajad teatasid Xen Hypervisori kasutamise v\u00f5imalusest 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