{"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\/da\/blog\/news\/vypusk-gipervizora-xen-4-17","title":{"rendered":"Udgivelse af hypervisor Xen 4.17","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Efter et \u00e5rs udvikling er frigivelsen af den frie hypervisor Xen 4.17 offentliggjort. Virksomheder som Amazon, Arm, Bitdefender, Citrix, EPAM Systems og Xilinx (AMD) har v\u00e6ret involveret i udviklingen af den nye version. Opdateringer til Xen 4.17-grenen vil forts\u00e6tte indtil den 12. juni 2024, og offentligg\u00f8relsen af sikkerhedsrettelser vil vare indtil den 12. december 2025.      <\/p>\n<p>N\u00f8gle\u00e6ndringer i Xen 4.17:   <\/p>\n<ul>\n<li class=\"l\"> Der er sikret delvis overholdelse af kravene til udvikling af sikre og p\u00e5lidelige programmer p\u00e5 C-sproget, som er formuleret i MISRA-C specifikationerne, der anvendes ved oprettelsen af kritiske systemer. Der er officielt implementeret 4 direktiver og 24 regler fra MISRA-C i Xen (ud af 143 regler og 16 direktiver), og der er sikret integration af den statiske analyser MISRA-C i byggeprocesserne, hvilket kontrollerer overholdelsen af specifikationen.\n<li class=\"l\"> Der er givet mulighed for at definere en statisk konfiguration af Xen til ARM-systemer, som p\u00e5 forh\u00e5nd fastl\u00e6gger alle de ressourcer, der er n\u00f8dvendige for at starte g\u00e6stesystemerne. Alle ressourcer som delt hukommelse, kanaler til begivenhedsnotifikationer og plads i hypervisorens heap allokeres p\u00e5 forh\u00e5nd ved opstart af hypervisoren, i stedet for at blive tildelt dynamisk, hvilket eliminerer mulige fejl p\u00e5 grund af ressourceknaphed under drift.\n<li class=\"l\"> Til indlejrede systemer baseret p\u00e5 ARM-arkitekturen er der implementeret en eksperimentel (tech preview) underst\u00f8ttelse af virtualisering af input\/output ved brug af VirtIO-protokoller. Virtio-mmio transporten er brugt til dataudveksling med de virtuelle input\/output-enheder, hvilket muligg\u00f8r kompatibilitet med en bred vifte af VirtIO-enheder. Der er implementeret frontend-support til Linux, inklusive v\u00e6rkt\u00f8jer (libxl\/xl), dom0less-tilstand og backends, der k\u00f8rer i brugerrummet (backends som virtio-disk, virtio-net, i2c og gpio er blevet testet).\n<li class=\"l\"> St\u00f8tten til dom0less-tilstanden er forbedret, hvilket muligg\u00f8r drift uden implementering af dom0-milj\u00f8et ved opstart <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/da\/vps\/\"   title=\"virtual machines\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2131\">virtual machines<\/a> I den tidlige fase af serveropstarten er der mulighed for at definere CPU-pools (CPUPOOL) under opstart (via en enhedstr\u00e6), hvilket muligg\u00f8r brug af pools i konfigurationer uden dom0, for eksempel til at binde forskellige typer CPU-kjerner p\u00e5 ARM-systemer baseret p\u00e5 big.LITTLE-arkitektur, der kombinerer kraftige, men energikr\u00e6vende kerner, med mindre effektive, men mere energieffektive kerner. Desuden er der i dom0less muligheden for at binde frontend\/backend para-virtualisering til g\u00e6stesystemer, hvilket g\u00f8r det muligt at starte g\u00e6stesystemer med de n\u00f8dvendige para-virtualiserede enheder.\n<li class=\"l\"> P\u00e5 ARM-systemer tildeles strukturene for hukommelsesvirtualisering (P2M, Physical to Machine) nu fra en hukommelsespool, der dannes ved oprettelsen af en domene, hvilket \u00f8ger effektiviteten af isoleringen mellem g\u00e6stesystemerne ved hukommelsesrelaterede fejl.\n<li class=\"l\"> For ARM-systemer er der tilf\u00f8jet beskyttelse mod Spectre-BHB s\u00e5rbarheden i mikroarkitekturelle strukturer i processorerne.\n<li class=\"l\"> P\u00e5 ARM-systemer er det nu muligt at k\u00f8re operativsystemet Zephyr i root-milj\u00f8et Dom0.\n<li class=\"l\"> Der er mulighed for separat (out-of-tree) bygning af hypervisoren.\n<li class=\"l\"> P\u00e5 x86-systemer er der sikret st\u00f8tte til store IOMMU-sider (superpage) for alle typer g\u00e6stesystemer, hvilket \u00f8ger b\u00e5ndbredden ved PCI-enhedspassthrough. Der er tilf\u00f8jet st\u00f8tte til v\u00e6rter med op til 12 TB RAM. Under opstart er det muligt at angive cpuid-parametre for dom0. Til beskyttelsesforanstaltninger mod CPU-angreb i g\u00e6stesystemerne, der er implementeret p\u00e5 hypervisorniveauet, foresl\u00e5s parametrene VIRT_SSBD og MSR_SPEC_CTRL.\n<li class=\"l\"> VirtIO-Grant transporten udvikles separat og adskiller sig fra VirtIO-MMIO ved at have et h\u00f8jere sikkerhedsniveau og muligheden for at k\u00f8re behandlere i et separat isoleret dom\u00e6ne for drivere. I VirtIO-Grant anvendes ikke direkte hukommelseskortl\u00e6gning, men overs\u00e6ttelse af fysiske adresser fra g\u00e6stesystemet til grant-referencer, hvilket muligg\u00f8r brugen af forudgodkendte omr\u00e5der af delt hukommelse til datadeling mellem g\u00e6stesystemet og VirtIO-backend, uden at backend f\u00e5r rettigheder til at foretage hukommelseskortl\u00e6gning. St\u00f8tte til VirtIO-Grant er allerede implementeret i Linux-kernen, men er endnu ikke inkluderet i QEMU-backends, virtio-vhost og v\u00e6rkt\u00f8jet (libxl\/xl).\n<li class=\"l\"> Udviklingen af Hyperlaunch-initiativet forts\u00e6tter, som har til form\u00e5l at give fleksible v\u00e6rkt\u00f8jer til konfiguration af opstart af virtuelle maskiner under systemboot. I \u00f8jeblikket er det f\u00f8rste s\u00e6t patches klar, som muligg\u00f8r identificering af PV-dom\u00e6ner og overf\u00f8rsel af deres billeder til hypervisoren under boot. Alt n\u00f8dvendigt for at starte s\u00e5danne para-virtualiserede systemer er ogs\u00e5 implementeret. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/da\/domain\/\"   title=\"dom\u00e6ner\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3179\">dom\u00e6ner<\/a>, herunder Xenstore-komponenter til PV-drivere. Efter godkendelse af patchene vil arbejdet begynde med at inkludere support til PVH- og HVM-enheder samt implementeringen af et separat dom\u00e6ne domB (builder domain), der er egnet til at organisere m\u00e5lt boot, som verificerer \u00e6gtheden af alle indl\u00e6ste komponenter.\n<li class=\"l\"> Arbejdet med at oprette Xen-porten til RISC-V-arkitekturen forts\u00e6tter.  <\/ul>\n<p>Kilde: <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 5.0.3 - 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