{"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\/hu\/blog\/news\/v-gipervizore-xen-realizovana-podderzhka-platy-raspberry-pi-4","title":{"rendered":"A Xen hipervizorban t\u00e1mogat\u00e1s ker\u00fclt megval\u00f3s\u00edt\u00e1sra a Raspberry Pi 4-hez","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A Xen projekt fejleszt\u0151i bejelentett\u00e9k<\/a><\/noindex> a Xen Hypervisor Raspberry Pi 4-es lapokon t\u00f6rt\u00e9n\u0151 haszn\u00e1lat\u00e1nak megval\u00f3s\u00edt\u00e1s\u00e1r\u00f3l. A Xen Raspberry Pi kor\u00e1bbi verzi\u00f3in val\u00f3 m\u0171k\u00f6d\u00e9s\u00e9t a virtualiz\u00e1ci\u00f3t nem t\u00e1mogat\u00f3, nem szabv\u00e1nyos megszak\u00edt\u00f3 vez\u00e9rl\u0151 alkalmaz\u00e1sa akad\u00e1lyozta. A Raspberry Pi 4-ben egy standard GIC-400 megszak\u00edt\u00f3 vez\u00e9rl\u0151 lett alkalmazva, amelyet a Xen t\u00e1mogat, \u00e9s a fejleszt\u0151k arra sz\u00e1m\u00edtottak, hogy nem lesznek probl\u00e9m\u00e1k a Xen ind\u00edt\u00e1s\u00e1val. De a val\u00f3s\u00e1gban minden m\u00e1sk\u00e9pp alakult, \u00e9s a Xen Raspberry Pi 4-en t\u00f6rt\u00e9n\u0151 m\u0171k\u00f6d\u00e9s\u00e9nek biztos\u00edt\u00e1sa \u00e9rdek\u00e9ben jelent\u0151s m\u00f3dos\u00edt\u00e1sokat kellett v\u00e9gezni a mem\u00f3ria kezel\u00e9s\u00e9vel kapcsolatos k\u00f3dban.<\/p>\n

A Raspberry Pi 4 els\u0151 verzi\u00f3i csak az els\u0151 egy gigab\u00e1jtos mem\u00f3riac\u00edm-tartom\u00e1nyhoz biztos\u00edtott\u00e1k a hozz\u00e1f\u00e9r\u00e9st, ami nem volt elegend\u0151 a Dom0 sz\u00e1m\u00e1ra. A sz\u00fcks\u00e9ges m\u00f3dos\u00edt\u00e1sokat a Xen 4.14 kiad\u00e1s\u00e1ba be\u00e9p\u00edtett\u00e9k, de r\u00f6gt\u00f6n felmer\u00fclt egy m\u00e1sik probl\u00e9ma \u2014 a Xen alrendszerben, amely a virtu\u00e1lis c\u00edmek fizikai c\u00edmekk\u00e9 alak\u00edt\u00e1s\u00e1\u00e9rt felelt, a virt_to_phys h\u00edv\u00e1st haszn\u00e1lt\u00e1k, ami nem m\u0171k\u00f6d\u00f6tt minden virtu\u00e1lis c\u00edmre, \u00e9s egyes virtu\u00e1lis c\u00edmek \u00e1talak\u00edt\u00e1si k\u00eds\u00e9rletei hib\u00e1val z\u00e1rultak. A probl\u00e9ma megold\u00e1s\u00e1hoz egy m\u00e1sik c\u00edm\u00e1talak\u00edt\u00f3 funkci\u00f3t kellett hozz\u00e1adni.<\/p>\n

Ezzel a probl\u00e9m\u00e1k nem \u00e9rtek v\u00e9get, \u00e9s egy k\u00fcl\u00f6n\u00f6s tulajdons\u00e1g mer\u00fclt fel a DMA m\u0171k\u00f6d\u00e9s\u00e9ben \u2014 a Xen \u00e1ltal kor\u00e1bban t\u00e1mogatott \u00f6sszes platformon (x86, ARM \u00e9s ARM64) a DMA c\u00edmek \u00e9s a fizikai c\u00edmek mindig megegyeztek, de a Raspberry Pi 4 eset\u00e9ben ez elt\u00e9rt. A megold\u00e1s megtal\u00e1l\u00e1sa a legnehezebb feladat volt, \u00e9s Linux kernelhez kellett patch-eket fejleszteni, amelyek a fizikai c\u00edmek \u00e9s a DMA c\u00edmek k\u00f6z\u00f6tti \u00e1talak\u00edt\u00e1st v\u00e9gezt\u00e9k. <\/p>\n

A k\u00e9sz\u00edtett jav\u00edt\u00e1sok a Linux kernel 5.9-es verzi\u00f3j\u00e1ba beker\u00fcltek, \u00e9s most a Xen k\u00e9szen \u00e1ll a virtualiz\u00e1ci\u00f3 megval\u00f3s\u00edt\u00e1s\u00e1ra Raspberry Pi 4-es lapokon. Most m\u00e1r a Raspberry Pi 4-en is haszn\u00e1lhat\u00f3 EVE<\/a><\/noindex> (Edge Virtualization Engine), a Xen-t haszn\u00e1l\u00f3 felh\u0151alap\u00fa alkalmaz\u00e1sok l\u00e9trehoz\u00e1s\u00e1hoz \u00e9s futtat\u00e1s\u00e1hoz sz\u00fcks\u00e9ges motor, Linuxkit<\/a><\/noindex> \u00e9s Alpine Linux<\/a><\/noindex> alkalmaz\u00e1s virtu\u00e1lis infrastrukt\u00fara l\u00e9trehoz\u00e1s\u00e1hoz hordozhat\u00f3 eszk\u00f6z\u00f6k\u00f6n.<\/p>\n

Ezenk\u00edv\u00fcl meg kell eml\u00edteni 10 sebezhet\u0151s\u00e9g megsz\u00fcntet\u00e9s\u00e9t<\/a><\/noindex> a Xen-ben. A sebezhet\u0151s\u00e9gek CVE-2020-25599<\/a><\/noindex>,
\nCVE-2020-25603<\/a><\/noindex> \u00e9s
\nCVE-2020-25595<\/a><\/noindex>
\n potenci\u00e1lisan lehet\u0151v\u00e9 teszik, hogy a vend\u00e9grendszer jogosults\u00e1gokat szerezzen a hoszt k\u00f6rnyezet\u00e9ben. A probl\u00e9m\u00e1k
\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> \u00e9s
\nCVE-2020-25602<\/a><\/noindex>
\na szolg\u00e1ltat\u00e1smegvon\u00e1s v\u00e9grehajt\u00e1s\u00e1ra korl\u00e1toz\u00f3dnak.<\/p>\n

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

Forr\u00e1s: 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 Xen \u043e\u0431\u044a\u044f\u0432\u0438\u043b\u0438 \u043e \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f Xen Hypervisor \u043d\u0430 \u043f\u043b\u0430\u0442\u0430\u0445 Raspberry Pi 4. \u0410\u0434\u0430\u043f\u0442\u0430\u0446\u0438\u0438 Xen \u0434\u043b\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u043d\u0430 \u043f\u0440\u043e\u0448\u043b\u044b\u0445 \u0432\u0430\u0440\u0438\u0430\u043d\u0442\u0430\u0445 \u043f\u043b\u0430\u0442 Raspberry Pi \u043c\u0435\u0448\u0430\u043b\u043e \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u0435 \u043d\u0435\u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043d\u043e\u0433\u043e \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u043b\u0435\u0440\u0430 \u043f\u0440\u0435\u0440\u044b\u0432\u0430\u043d\u0438\u0439, \u043d\u0435 \u0438\u043c\u0435\u044e\u0449\u0435\u0433\u043e \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438. \u0412 Raspberry Pi 4 \u0431\u044b\u043b \u043f\u0440\u0438\u043c\u0435\u043d\u0451\u043d \u043e\u0431\u044b\u0447\u043d\u044b\u0439 \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u043b\u0435\u0440 \u043f\u0440\u0435\u0440\u044b\u0432\u0430\u043d\u0438\u0439 GIC-400, \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u043c\u044b\u0439 \u0432 Xen, \u0438 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u0440\u0430\u0441\u0441\u0447\u0438\u0442\u044b\u0432\u0430\u043b\u0438, \u0447\u0442\u043e \u043f\u0440\u043e\u0431\u043b\u0435\u043c \u0441 \u0437\u0430\u043f\u0443\u0441\u043a\u043e\u043c Xen […]<\/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\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\udd47A Xen hypervisor t\u00e1mogatja a Raspberry Pi 4-et | ProHoster","description":"A Xen projekt fejleszt\u0151i bejelentett\u00e9k, hogy lehet\u0151v\u00e9 tett\u00e9k a Xen Hypervisor haszn\u00e1lat\u00e1t az 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