{"id":84726,"date":"2020-06-10T13:42:19","date_gmt":"2020-06-10T11:42:19","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/mikroyadro-sel4-matematicheski-verificzirovano-dlya-arhitektury-risc-v"},"modified":"2020-06-10T13:42:19","modified_gmt":"2020-06-10T11:42:19","slug":"mikroyadro-sel4-matematicheski-verificzirovano-dlya-arhitektury-risc-v","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/mikroyadro-sel4-matematicheski-verificzirovano-dlya-arhitektury-risc-v","title":{"rendered":"Mikrojaot seL4 on matemaatiliselt kinnitatud RISC-V arhitektuurile","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

RISC-V Foundationi organisatsioon teatas<\/a><\/noindex> mikrojaotuse t\u00f6\u00f6 verifitseerimisest seL4<\/a><\/noindex> RISC-V k\u00e4su komplekti arhitektuuril. Verifitseerimine seisneb matemaatilises t\u00f5enduses<\/a><\/noindex> seL4 t\u00f6\u00f6 usaldusv\u00e4\u00e4rsuse kohta, mis n\u00e4itab t\u00e4ielikku vastavust ametlikul keelel formuleeritud spetsifikatsioonidele. Usaldusv\u00e4\u00e4rsuse t\u00f5endamine lubab kasutada<\/a><\/noindex> seL4 RISC-V RV64 protsessorite baasil asuvates kriitilistes s\u00fcsteemides, mis n\u00f5uavad k\u00f5rget usaldusv\u00e4\u00e4rsust ja garanteerivad t\u00f5rgete puudumise. Tarkvaraarendajad, kes t\u00f6\u00f6tavad seL4 tuuma kohal, v\u00f5ivad olla t\u00e4iesti kindlad, et kui \u00fcks osa s\u00fcsteemist eba\u00f5nnestub, siis see eba\u00f5nnestumine ei leki \u00fclej\u00e4\u00e4nud s\u00fcsteemi, sealhulgas selle kriitilistesse osadesse. <\/p>\n

Alguses oli mikrojaot seL4 verifitseeritud 32-bitiste ARM protsessorite jaoks ning hiljem 64-bitiste x86 protsessorite jaoks. T\u00e4heldatakse, et avatud RISC-V arhitektuuri ja avatud mikrojaot seL4 kombinatsioon v\u00f5imaldab saavutada uue turvalisuse taseme, kuna riistvara koostisosad v\u00f5ivad tulevikus samuti t\u00e4ielikult kinnitatud olla, mis ei ole v\u00f5imalik patenteeritud riistvaraarhitektuuride puhul. <\/p>\n

seL4 verifitseerimisel eeldatakse, et riistvara t\u00f6\u00f6tab nagu on deklareeritud ja spetsifikatsioon kirjeldab s\u00fcsteemi k\u00e4itumist t\u00e4ielikult, kuid tegelikult pole riistvara vigadest vabastatud, mida t\u00f5endab regulaarselt esinevad probleemid instruktsioonide spekulatiivse t\u00e4itmise mehhanismis. Avatud riistvaraplatvormid lihtsustavad turvalisusega seotud muudatuste integreerimist \u2014 n\u00e4iteks, et blokeerida k\u00f5ik v\u00f5imalikud lekke kanalid kolmandate osapartnerite kaudu, kus on palju t\u00f5husam probleemist riistvara tasandil lahti saada, kui p\u00fc\u00fcda leida ringtee tarkvara abil.<\/p>\n

Tuletame meelde, et seL4 arhitektuur on t\u00e4helepanuv\u00e4\u00e4rne<\/a><\/noindex> kernelite ressursside haldamise osade viimine kasutajara, kasutades sama juurdep\u00e4\u00e4sukontrolli vahendeid nagu kasutajate ressursside jaoks. Mikro\u00fcdamik ei paku valmis k\u00f5rgetasemelisi abstraktsioone failide, protsesside, v\u00f5rgu\u00fchenduste jne haldamiseks; selle asemel pakub see ainult minimaalset mehhanismi f\u00fc\u00fcsilise aadressiruumi, katkestuste ja protsessori ressursside haldamiseks. K\u00f5rgetasemelised abstraktsioonid ja seadme draiverid rakendatakse eraldi mikro\u00fcdamiku peal \u00fclesanne kujul, mis toimub kasutajatasemel. Selliste \u00fclesannete juurdep\u00e4\u00e4s mikro\u00fcdamiku ressurssidele korraldatakse reeglite m\u00e4\u00e4ratlemise kaudu.<\/p>\n

RISC-V pakub avatud ja paindlikku masinainstruktsioonide s\u00fcsteemi, mis v\u00f5imaldab luua mikroprotsessoreid erinevates kasutusvaldkondades, ilma litsentsitasudeta ja ilma kasutustingimusteta. RISC-V v\u00f5imaldab luua t\u00e4iesti avatud SoC ja protsessoreid. Praegu on RISC-V spetsifikatsiooni alusel erinevad ettev\u00f5tted ja kogukonnad v\u00e4lja t\u00f6\u00f6tanud mitmesuguseid tasuta litsentse (BSD, MIT, Apache 2.0). areneb<\/a><\/noindex> m\u00f5nik\u00fcmmend erinevat mikroprotsessori tuuma, SoC ja juba tootmisse viidud kiipe. RISC-V tugi on olemas alates Glibc 2.27, binutils 2.30, gcc 7 ja Linuxi tuuma 4.15 v\u00e4ljaandmisest.<\/p>\n

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

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

\u041e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u044f RISC-V Foundation \u0441\u043e\u043e\u0431\u0449\u0438\u043b\u0430 \u043e \u0432\u0435\u0440\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 \u0440\u0430\u0431\u043e\u0442\u044b \u043c\u0438\u043a\u0440\u043e\u044f\u0434\u0440\u0430 seL4 \u043d\u0430 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445 \u0441 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u043e\u0439 \u043d\u0430\u0431\u043e\u0440\u0430 \u043a\u043e\u043c\u0430\u043d\u0434 RISC-V. \u0412\u0435\u0440\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f \u0441\u0432\u043e\u0434\u0438\u0442\u0441\u044f \u043a \u043c\u0430\u0442\u0435\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u043e\u043c\u0443 \u0434\u043e\u043a\u0430\u0437\u0430\u0442\u0435\u043b\u044c\u0441\u0442\u0432\u0443 \u043d\u0430\u0434\u0451\u0436\u043d\u043e\u0441\u0442\u0438 \u0440\u0430\u0431\u043e\u0442\u044b seL4, \u043a\u043e\u0442\u043e\u0440\u043e\u0435 \u0441\u0432\u0438\u0434\u0435\u0442\u0435\u043b\u044c\u0441\u0442\u0432\u0443\u0435\u0442 \u043e \u043f\u043e\u043b\u043d\u043e\u043c \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0438\u0438 \u0437\u0430\u0434\u0430\u043d\u043d\u044b\u043c \u043d\u0430 \u0444\u043e\u0440\u043c\u0430\u043b\u044c\u043d\u043e\u043c \u044f\u0437\u044b\u043a\u0435 \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f\u043c. \u0414\u043e\u043a\u0430\u0437\u0430\u0442\u0435\u043b\u044c\u0441\u0442\u0432\u043e \u043d\u0430\u0434\u0451\u0436\u043d\u043e\u0441\u0442\u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c seL4 \u0432 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0438 \u0432\u0430\u0436\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445 \u043d\u0430 \u0431\u0430\u0437\u0435 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u043e\u0432 RISC-V RV64, \u0442\u0440\u0435\u0431\u0443\u044e\u0449\u0438\u0445 \u043f\u043e\u0432\u044b\u0448\u0435\u043d\u043d\u043e\u0433\u043e \u0443\u0440\u043e\u0432\u043d\u044f \u043d\u0430\u0434\u0451\u0436\u043d\u043e\u0441\u0442\u0438 \u0438 \u0433\u0430\u0440\u0430\u043d\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0445 \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u0435 […]<\/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-84726","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\udd47Mikro\u00fcdamik seL4 on matemaatiliselt verifitseeritud RISC-V 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