{"id":148860,"date":"2025-11-19T17:11:54","date_gmt":"2025-11-19T15:11:54","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-gipervizora-xen-4-21"},"modified":"2025-11-19T17:11:54","modified_gmt":"2025-11-19T15:11:54","slug":"vypusk-gipervizora-xen-4-21","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/vypusk-gipervizora-xen-4-21","title":{"rendered":"Xen 4.21 h\u00fcperviisori v\u00e4ljaanne","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>P\u00e4rast 8 kuu arengut on avaldatud tasuta h\u00fcperviisori Xen 4.21 v\u00e4ljaanne. Uue v\u00e4ljaande arendamises osalesid sellised ettev\u00f5tted nagu Amazon, Arm, EPAM Systems ja AMD. Projekti kood on kirjutatud C keeles ja levitatakse GPLv2+ litsentsi alusel. Arendust juhib Linux Foundation.      <\/p>\n<p>Peamised muudatused Xen 4.21-s:   <\/p>\n<ul>\n<li class=\"l\"> Tagatud on t\u00e4ielik tugi Linuxi stubdomainite seadmemudelile, mis v\u00f5imaldab emuleerida seadmete komponente eraldi mitteprivileegitud kasutaja kaudu. Linuxi stubomains mudeli on v\u00e4lja t\u00f6\u00f6tanud QUBES OS projekt ja see toetab uusimate QEMU v\u00e4ljaannete emulatsioonidraiverite kasutamist ning QEMU kinnitusv\u00f5imalusi k\u00fclaliss\u00fcsteemide jaoks.\n<li class=\"l\"> Muudatused x86 arhitektuuri p\u00f5hinevates s\u00fcsteemides:\n<ul>\n<li class=\"l\"> Lisatud on tugi uue PDX (Page inDeX) struktuuri compressioonialgoritmi jaoks, mis parandab Xen-i toimimist Intel Sierra Forest ja Granite Rapids protsessoritel eba\u00fchtliku f\u00fc\u00fcsilise m\u00e4lu kaardistamise (sparse memory map) korral, mis lubab t\u00fchje alasid.\n<li class=\"l\"> Lisatud on v\u00f5imalus kontrollida MTRR (Memory Type Range Registers) kandevahetust BAR (Base Address Register) baas PCI-seadmest Xen platvormil, mida kasutavad k\u00fclaliss\u00fcsteemid HVM re\u017eiimis. MTRR-is on vaikimisi PCI-seadmete peegeldatud m\u00e4lu jaoks seatud UC (uncacheable) atribuudi, mis on reaalsete PCI-seadmete jaoks m\u00f5ttekas, kuid v\u00e4hendab Xen platvormi PCI-seadmete j\u00f5udlust.\n<li class=\"l\"> AMD protsessoritele on lisatud uus draiver amd-cppc\/amd-cppc-epp, mis haldab CPU sageduse muutmist optimaalse j\u00f5udluse saavutamiseks. Draiveris on kasutusel CPPC (Collaborative Processor Performance Control) mehhanism, mis erineb acpi-cpufreq-st, sest ei ole piiratud kolme j\u00f5udluse tasemega ja v\u00f5imaldab kiiremini reageerida oleku muutustele.\n<li class=\"l\"> xenstore-stubdom-i vahekiht, mida kasutatakse xenstored k\u00e4ivitamiseks ilma Dom0 privileegideta, rakendab para-v\u00f5rgustikes PVH re\u017eiimis eluaegse uuendamise toetust.\n<li class=\"l\"> Dom0-s PVH re\u017eiimis on saavutatud Resizable BAR (Resizable Base Address Register) tehnoloogia tugi, mis v\u00f5imaldab kohe juurdep\u00e4\u00e4su kogu PCI Express seadme m\u00e4lule, mitte ainult blokeeritud kujul.\n<li class=\"l\"> PCI-seadmete edastamise v\u00f5imalus on ellu viidud domU-keskkondades HVM-re\u017eiimis (t\u00e4ielik riistvaraline virtualiseerimine) konfiguratsioonides, kus dom0 t\u00f6\u00f6tab PVH-re\u017eiimis (h\u00fcbriidne riistvaraline virtualiseerimine ja para-virtualiseerimine).  <\/ul>\n<li class=\"l\"> Muutused ARM-arhitektuuriga s\u00fcsteemides:\n<ul>\n<li class=\"l\"> Lisatud on stack protection mechanismi aktiveerimise v\u00f5imalus (koostamine lipuga &#171;-fstack-protector&#187;), mis p\u00f5hineb kanarim\u00e4rkide lisamisel stacki \u2014 juhuslikud j\u00e4rjestused. Kui t\u00f6\u00f6tamise k\u00e4igus toimub puhvri \u00fcleujutus ja kanarim\u00e4rk kirjutatakse \u00fcle teiste andmetega, k\u00e4ivitub j\u00e4rgmine kontroll m\u00e4rgi muutumatuse osas ning rakendus l\u00f5petatakse kriitilisel viisil.\n<li class=\"l\"> Lisatud eSPI (Extended Shared Peripheral Interrupts) mehhanismi tugi, mida pakuvad GICv3.1 katkestuskontrollerid.\n<li class=\"l\"> SMMU (System Memory Management Unit) t\u00f6\u00f6tlemine on ellu viidud PCIe seadmete edastamisel.\n<li class=\"l\"> Lisatud tugi PCI host kontrolleritele, mida kasutatakse neljandas p\u00f5lvkonnas SoC Renesas R-Car.\n<li class=\"l\"> Algne tugi Cortex-R52 ja Cortex-R82 protsessoritele koos MPU (Memory Protection Unit) on lisatud.    <\/ul>\n<li class=\"l\"> Xeni RISC-V arhitektuuris on ellu viidud p\u00f5hitoe UART-ile ja v\u00f5imalus v\u00e4liste katkestuste t\u00f6\u00f6tlemiseks (APLIC\/IMSIC) h\u00fcperviisori re\u017eiimis.\n<li class=\"l\"> Continued implementation of secure and reliable programming requirements in C, as outlined in the MISRA-C specifications for critical systems.\n<li class=\"l\"> Toetused vanadele GCC ja Clang versioonidele on l\u00f5petatud, n\u00fc\u00fcd on v\u00e4hemalt vajalikud GCC 5.1, Clang 11, Binutils 2.25 ja GNU Make 3.80 versioonid.  <\/ul>\n<p>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=64285\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 8 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \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 4.21. \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, EPAM Systems \u0438 AMD. \u041a\u043e\u0434 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 \u0421\u0438 \u0438 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 GPLv2+. \u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0430 \u0432\u0435\u0434\u0451\u0442\u0441\u044f \u0432 \u0441\u043e\u0441\u0442\u0430\u0432\u0435 \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 Linux Foundation. \u041a\u043b\u044e\u0447\u0435\u0432\u044b\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0432 Xen 4.21: \u041e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0430 \u043f\u043e\u043b\u043d\u0430\u044f \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u043c\u043e\u0434\u0435\u043b\u0438 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432 Linux stubdomain, [&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-148860","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - 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