{"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\/sk\/blog\/news\/vypusk-gipervizora-xen-4-17","title":{"rendered":"Vydanie hyperv\u00edzora Xen 4.17","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Po roku v\u00fdvoja bol zverejnen\u00fd release vo\u013en\u00e9ho hyperv\u00edzora Xen 4.17. Na v\u00fdvoji novej verzie sa podie\u013eali spolo\u010dnosti ako Amazon, Arm, Bitdefender, Citrix, EPAM Systems a Xilinx (AMD). Tvorba aktualiz\u00e1ci\u00ed pre vetvu Xen 4.17 potrv\u00e1 do 12. j\u00fana 2024, a publikovanie opr\u00e1v zranite\u013enost\u00ed do 12. decembra 2025.      <\/p>\n<p>K\u013e\u00fa\u010dov\u00e9 zmeny v Xen 4.17:   <\/p>\n<ul>\n<li class=\"l\"> Bolo zabezpe\u010den\u00e9 \u010diasto\u010dn\u00e9 dodr\u017eanie po\u017eiadaviek na v\u00fdvoj bezpe\u010dn\u00fdch a spo\u013eahliv\u00fdch programov v jazyku C, formulovan\u00fdch v \u0161pecifik\u00e1ci\u00e1ch MISRA-C, ktor\u00e9 sa pou\u017e\u00edvaj\u00fa pri tvorbe kritick\u00fdch syst\u00e9mov. V Xen boli ofici\u00e1lne zaveden\u00e9 4 smernice a 24 pravidiel MISRA-C (z 143 pravidiel a 16 smern\u00edc), a bola zabezpe\u010den\u00e1 integr\u00e1cia do procesov budovania statick\u00e9ho analyz\u00e1tora MISRA-C, ktor\u00fd kontroluje dodr\u017eiavanie po\u017eiadaviek \u0161pecifik\u00e1cie.\n<li class=\"l\"> Bol poskytnut\u00fd n\u00e1stroj na definovanie statickej konfigur\u00e1cie Xen pre syst\u00e9my ARM, ktor\u00e1 vopred pevne ur\u010duje v\u0161etky zdroje potrebn\u00e9 na spustenie hostite\u013esk\u00fdch syst\u00e9mov. V\u0161etky zdroje, ako s\u00fa zdie\u013ean\u00e1 pam\u00e4\u0165, kan\u00e1ly na ozn\u00e1menia o udalostiach a priestor v z\u00e1sobn\u00edku hyperv\u00edzora, s\u00fa prerozdelen\u00e9 u\u017e pri \u0161tarte hyperv\u00edzora, a nie pridelen\u00e9 dynamicky, \u010d\u00edm sa vylu\u010duj\u00fa mo\u017en\u00e9 zlyhania z nedostatku zdrojov po\u010das prev\u00e1dzky.\n<li class=\"l\"> Pre zabudovan\u00e9 syst\u00e9my zalo\u017een\u00e9 na architekt\u00fare ARM bola implementovan\u00e1 experiment\u00e1lna (tech preview) podpora virtualiz\u00e1cie vstupu\/v\u00fdstupu s pou\u017eit\u00edm protokolov VirtIO. Na v\u00fdmenu d\u00e1t s virtu\u00e1lnym zariaden\u00edm vstupu\/v\u00fdstupu bol vyu\u017eit\u00fd transport virtio-mmio, \u010do umo\u017enilo zabezpe\u010di\u0165 kompatibilitu s \u0161irok\u00fdm spektrom zariaden\u00ed VirtIO. Realizovan\u00e1 podpora frontend pre Linux, n\u00e1strojov\u00e9ho vybavenia (libxl\/xl), re\u017eimu dom0less a backendov sp\u00fa\u0161\u0165an\u00fdch v u\u017e\u00edvate\u013eskom priestore (testovan\u00e9 s\u00fa backendy virtio-disk, virtio-net, i2c a gpio).\n<li class=\"l\"> Zlep\u0161en\u00e1 podpora re\u017eimu dom0less, ktor\u00fd umo\u017e\u0148uje ob\u00eds\u0165 sa bez nasadenia prostredia dom0 pri sp\u00fa\u0161\u0165an\u00ed <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sk\/vps\/\"   title=\"virtu\u00e1ln\u00edch stroj\u016f\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2131\">virtu\u00e1ln\u00edch stroj\u016f<\/a> V po\u010diato\u010dnej f\u00e1ze zav\u00e1dzania servera bola poskytnut\u00e1 mo\u017enos\u0165 defin\u00edcie CPU poolov (CPUPOOL) v tejto f\u00e1ze (cez zariadenie tree), \u010do umo\u017e\u0148uje pou\u017e\u00edva\u0165 pooly v konfigur\u00e1ci\u00e1ch bez dom0, napr\u00edklad na priradenie r\u00f4znych typov CPU jadier na syst\u00e9moch ARM zalo\u017een\u00fdch na architekt\u00fare big.LITTLE, kombinuj\u00facich v jednom \u010dipe v\u00fdkonn\u00e9, ale energeticky n\u00e1ro\u010dn\u00e9 jadr\u00e1, a menej v\u00fdkonn\u00e9, ale energeticky efekt\u00edvne jadr\u00e1. Navy\u0161e, v re\u017eime dom0less bola poskytnut\u00e1 mo\u017enos\u0165 priradenia front-endu\/back-endu paravirtualiz\u00e1cie k hos\u0165uj\u00facim syst\u00e9mom, \u010do umo\u017e\u0148uje zav\u00e1dza\u0165 hos\u0165uj\u00face syst\u00e9my s potrebn\u00fdmi paravirtualizovan\u00fdmi zariadeniami.\n<li class=\"l\"> Na syst\u00e9moch ARM s\u00fa \u0161trukt\u00fary paravirtualiz\u00e1cie pam\u00e4te (P2M, Physical to Machine) teraz pride\u013eovan\u00e9 z pam\u00e4\u0165ov\u00e9ho poolu vytvoren\u00e9ho pri vytv\u00e1ran\u00ed dom\u00e9ny, \u010do zvy\u0161uje efektivitu izol\u00e1cie medzi hos\u0165uj\u00facimi syst\u00e9mami v pr\u00edpade v\u00fdskytu por\u00fach s\u00favisiacich s pam\u00e4\u0165ou.\n<li class=\"l\"> Pre syst\u00e9my ARM bola pridan\u00e1 ochrana pred zranite\u013enos\u0165ou Spectre-BHB v mikroarchitektonick\u00fdch \u0161trukt\u00farach procesorov.\n<li class=\"l\"> Na syst\u00e9moch ARM bola poskytnut\u00e1 mo\u017enos\u0165 spusti\u0165 opera\u010dn\u00fd syst\u00e9m Zephyr v kore\u0148ovom prostred\u00ed Dom0.\n<li class=\"l\"> Bola poskytnut\u00e1 mo\u017enos\u0165 samostatnej (out-of-tree) kompil\u00e1cie hyperv\u00edzora.\n<li class=\"l\"> Na syst\u00e9moch x86 je zabezpe\u010den\u00e1 podpora ve\u013ek\u00fdch str\u00e1nok IOMMU (superpage) pre v\u0161etky typy hos\u0165uj\u00facich syst\u00e9mov, \u010do zvy\u0161uje priepustnos\u0165 pri prenosoch PCI zariaden\u00ed. Bola pridan\u00e1 podpora hostite\u013eov vybaven\u00fdch a\u017e 12 TB RAM. V priebehu zav\u00e1dzania bola implementovan\u00e1 mo\u017enos\u0165 nastavi\u0165 parametre cpuid pre dom0. Na spr\u00e1vu ochrann\u00fdch opatren\u00ed proti \u00fatokom na CPU implementovan\u00fdm na \u00farovni hyperv\u00edzora s\u00fa navrhnut\u00e9 parametre VIRT_SSBD a MSR_SPEC_CTRL.\n<li class=\"l\"> Samostatne sa vyv\u00edja prenos VirtIO-Grant, ktor\u00fd sa od VirtIO-MMIO l\u00ed\u0161i vy\u0161\u0161ou \u00farov\u0148ou bezpe\u010dnosti a mo\u017enos\u0165ou sp\u00fa\u0161\u0165ania spracovate\u013eov v samostatnej izolovanej dom\u00e9ne pre ovl\u00e1da\u010de. V VirtIO-Grant sa namiesto priameho mapovania pam\u00e4te pou\u017e\u00edva transl\u00e1cia fyzick\u00fdch adries hos\u0165uj\u00faceho syst\u00e9mu na grant-odkazy, \u010do umo\u017e\u0148uje vyu\u017e\u00edva\u0165 predt\u00fdm dohodnut\u00e9 oblasti zdie\u013eanej pam\u00e4te na v\u00fdmenu \u00fadajov medzi hos\u0165uj\u00facim syst\u00e9mom a backendom VirtIO, bez poskytnutia backendu pr\u00e1v na mapovanie pam\u00e4te. Podpora VirtIO-Grant je u\u017e implementovan\u00e1 v jadre Linuxu, ale zatia\u013e nebola zahrnut\u00e1 do backendov QEMU, virtu-vhost a do n\u00e1strojov (libxl\/xl).\n<li class=\"l\"> Pokra\u010duje rozvoj iniciat\u00edvy Hyperlaunch, zameranej na poskytovanie flexibiln\u00fdch n\u00e1strojov na prisp\u00f4sobenie spustenia virtu\u00e1lnych strojov po\u010das zav\u00e1dzania syst\u00e9mu. V s\u00fa\u010dasnosti je u\u017e pripraven\u00fd prv\u00fd s\u00fabor opr\u00e1v, ktor\u00e9 umo\u017e\u0148uj\u00fa identifikova\u0165 PV dom\u00e9ny a pren\u00e1\u0161a\u0165 ich obrazy pri zav\u00e1dzan\u00ed hyperv\u00edzora. Implementovan\u00e9 je tie\u017e v\u0161etko potrebn\u00e9 na spustenie podobn\u00fdch paravirtualizovan\u00fdch. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sk\/domain\/\"   title=\"dom\u00e9n\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3179\">dom\u00e9n<\/a>, vr\u00e1tane komponentov Xenstore pre PV ovl\u00e1da\u010de. Po prijat\u00ed opr\u00e1v sa za\u010dne pr\u00e1ca na zapnut\u00ed podpory zariaden\u00ed PVH a HVM, ako aj na implement\u00e1cii samostatnej dom\u00e9ny domB (builder domain), vhodnej na organiz\u00e1ciu meranej zav\u00e1dzania (measured boot), ktor\u00e1 potvrdzuje d\u00f4veryhodnos\u0165 v\u0161etk\u00fdch nahr\u00e1van\u00fdch komponentov.\n<li class=\"l\"> Pokra\u010duje pr\u00e1ca na vytv\u00e1ran\u00ed portu Xen pre architekt\u00faru RISC-V.  <\/ul>\n<p>Zdroj: <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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