{"id":106135,"date":"2022-12-17T15:36:38","date_gmt":"2022-12-17T13:36:38","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-gipervizora-xen-4-17"},"modified":"2022-12-17T15:36:38","modified_gmt":"2022-12-17T13:36:38","slug":"vypusk-gipervizora-xen-4-17","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hr\/blog\/news\/vypusk-gipervizora-xen-4-17","title":{"rendered":"Izdanje hipervizora Xen 4.17","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Nakon godine razvoja objavljen je izdanak slobodnog hipervizora Xen 4.17. U razvoju novog izdanja sudjelovale su tvrtke poput Amazona, Arma, Bitdefendera, Citrixa, EPAM Systems i Xilinxa (AMD). Razvoj a\u017euriranja za granu Xen 4.17 trajat \u0107e do 12. lipnja 2024., dok \u0107e objava ispravaka ranjivosti trajati do 12. prosinca 2025.      <\/p>\n<p>Klju\u010dne promjene u Xen 4.17:   <\/p>\n<ul>\n<li class=\"l\"> Osigurano je djelomi\u010dno uskla\u0111ivanje s zahtjevima za razvoj sigurnih i pouzdanih programa na jeziku C, formuliranim u specifikacijama MISRA-C, koje se koriste u razvoju kriti\u010dnih sustava. U Xen su slu\u017ebeno implementirane 4 smjernice i 24 pravila MISRA-C (od 143 pravila i 16 smjernica), kao i osigurana integracija u procese izrade stati\u010dkog analizatora MISRA-C, koji provjerava ispunjava li se zahtjeve specifikacije.\n<li class=\"l\"> Omogu\u0107ena je definicija stati\u010dke konfiguracije Xen za ARM sustave, koja unaprijed odre\u0111uje sve resurse potrebne za pokretanje gostuju\u0107ih sustava. Svi resursi, poput dijeljene memorije, kanala za obavje\u0161tavanje o doga\u0111ajima i prostora u hrpi hipervizora, raspore\u0111uju se unaprijed pri pokretanju hipervizora umjesto da se dinami\u010dki dodjeljuju, \u010dime se isklju\u010duju mogu\u0107i kvarovi zbog nedostatka resursa tijekom rada.\n<li class=\"l\"> Za ugra\u0111ene sustave temeljen na ARM arhitekturi implementirana je eksperimentalna (tech preview) podr\u0161ka za virtualizaciju unosa\/izlaza koriste\u0107i protokole VirtIO. Za razmjenu podataka s virtualnim ure\u0111ajem unosa\/izlaza kori\u0161ten je transport virtio-mmio, \u0161to je omogu\u0107ilo kompatibilnost s \u0161irokim spektrom ure\u0111aja VirtIO. Implementirana je podr\u0161ka za frontend za Linux, alate (libxl\/xl), re\u017eim dom0less i pozadine pokretane u korisni\u010dkom prostoru (testirane su pozadine virtio-disk, virtio-net, i2c i gpio).\n<li class=\"l\"> Pobolj\u0161ana je podr\u0161ka za dom0less na\u010din rada, koji omogu\u0107ava izbjegavanje distribucije okru\u017eenja dom0 prilikom pokretanja. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/hr\/vps\/\"   title=\"virtualnih ma\u0161ina\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2131\">virtualnih ma\u0161ina<\/a> u ranoj fazi pokretanja servera. Pru\u017eena je mogu\u0107nost odre\u0111ivanja CPU pool-ova (CPUPOOL) u fazi pokretanja (kroz ure\u0111aj stablo), \u0161to omogu\u0107ava kori\u0161\u0107enje pool-ova u konfiguracijama bez dom0, na primer, za vezivanje razli\u010ditih tipova CPU jezgara na ARM sistemima zasnovanim na big.LITTLE arhitekturi, koji kombinuju mo\u0107na, ali energetski zahtevna jezgra i manje produktivna, ali energetski efikasna jezgra. Pored toga, u dom0less pru\u017eena je mogu\u0107nost vezivanja frontend\/backend para-virtualizacije za gostuju\u0107e sisteme, \u0161to omogu\u0107ava pokretanje gostuju\u0107ih sistema s potrebnim para-virtualizovanim ure\u0111ajima.\n<li class=\"l\"> Na ARM sistemima strukture virtualizacije memorije (P2M, Physical to Machine) sada se dodeljuju iz memorijskog pool-a formiranog pri stvaranju domena, \u0161to omogu\u0107ava pove\u0107anje efikasnosti izolacije izme\u0111u gostuju\u0107ih sistema prilikom pojave problema povezanih s memorijom.\n<li class=\"l\"> Za ARM sisteme dodata je za\u0161tita od ranjivosti Spectre-BHB u mikroarhitektonskim strukturama procesora.\n<li class=\"l\"> Na ARM sistemima omogu\u0107eno je pokretanje operativnog sistema Zephyr u korenskom okru\u017eenju Dom0.\n<li class=\"l\"> Pru\u017eena je mogu\u0107nost odvojene (out-of-tree) kompilacije hipervizora.\n<li class=\"l\"> Na x86 sistemima podr\u017eane su velike IOMMU stranice (superpage) za sve tipove gostuju\u0107ih sistema, \u0161to pove\u0107ava propusnost pri preusmeravanju PCI ure\u0111aja. Dodata je podr\u0161ka za hostove opremljene do 12 TB RAM-a. U fazi pokretanja implementirana je mogu\u0107nost postavljanja cpuid parametara za dom0. Za upravljanje za\u0161titnim merama protiv CPU napada u gostuju\u0107im sistemima implementiranim na nivou hipervizora predlo\u017eeni su VIRT_SSBD i MSR_SPEC_CTRL parametri.\n<li class=\"l\"> Odvojeno se razvija transport VirtIO-Grant, koji se razlikuje od VirtIO-MMIO vi\u0161im nivoom bezbednosti i mogu\u0107no\u0161\u0107u pokretanja rukovalaca u odvojenom izolovanom domenu za drajvere. U VirtIO-Grant, umesto direktnog mape memorije, koristi se translatacija fizi\u010dkih adresa gostuju\u0107e sisteme u grant reference, \u0161to omogu\u0107ava kori\u0161\u0107enje prethodno dogovorenih oblasti deljene memorije za razmenu podataka izme\u0111u gostuju\u0107e sisteme i VirtIO backend-a bez pru\u017eanja backend-u prava na izvr\u0161avanje mape memorije. Podr\u0161ka za VirtIO-Grant ve\u0107 je implementirana u Linux kernelu, ali jo\u0161 nije uklju\u010dena u QEMU backende, virtio-vhost i alat (libxl\/xl).\n<li class=\"l\"> Nastavlja se razvoj inicijative Hyperlaunch, usmjerene na pru\u017eanje fleksibilnih alata za konfiguraciju pokretanja virtualnih ma\u0161ina tijekom podizanja sustava. Trenutno je dostupan prvi set zakrpa koje omogu\u0107uju prepoznavanje PV domena i prijenos njihovih slika hipervizoru tijekom podizanja. Tako\u0111er je implementirano sve potrebno za pokretanje sli\u010dnih para-virtualiziranih <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/hr\/domain\/\"   title=\"domena\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3179\">domena<\/a>, uklju\u010duju\u0107i komponente Xenstore za PV upravlja\u010dke programe. Nakon prihva\u0107anja zakrpa zapo\u010det \u0107e rad na uklju\u010divanju podr\u0161ke za PVH i HVM ure\u0111aje, kao i implementaciju odvojene domene domB (builder domain), pogodnog za organizaciju mjerene podizanja (measured boot), koja potvr\u0111uje autenti\u010dnost svih u\u010ditavanih komponenti.\n<li class=\"l\"> Nastavlja se rad na stvaranju Xen porta za arhitekturu RISC-V.  <\/ul>\n<p>Izvor: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=58340\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 \u0433\u043e\u0434\u0430 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u0433\u0438\u043f\u0435\u0440\u0432\u0438\u0437\u043e\u0440\u0430 Xen 4.17. \u0412 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u043d\u043e\u0432\u043e\u0433\u043e \u0432\u044b\u043f\u0443\u0441\u043a\u0430 \u043f\u0440\u0438\u043d\u044f\u043b\u0438 \u0443\u0447\u0430\u0441\u0442\u0438\u0435 \u0442\u0430\u043a\u0438\u0435 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438, \u043a\u0430\u043a Amazon, Arm, Bitdefender, Citrix, EPAM Systems \u0438 Xilinx (AMD). \u0424\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0439 \u0434\u043b\u044f \u0432\u0435\u0442\u043a\u0438 Xen 4.17 \u043f\u0440\u043e\u0434\u043b\u0438\u0442\u0441\u044f \u0434\u043e 12 \u0438\u044e\u043d\u044f 2024 \u0433\u043e\u0434\u0430, \u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u044f \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u0434\u043e 12 \u0434\u0435\u043a\u0430\u0431\u0440\u044f 2025 \u0433\u043e\u0434\u0430. \u041a\u043b\u044e\u0447\u0435\u0432\u044b\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0432 Xen 4.17: \u041e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u043e \u0447\u0430\u0441\u0442\u0438\u0447\u043d\u043e\u0435 [&hellip;]<\/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-106135","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - 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