{"id":102492,"date":"2021-12-06T15:36:44","date_gmt":"2021-12-06T13:36:44","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-gipervizorov-xen-4-16-i-intel-cloud-hypervisor-20-0"},"modified":"2021-12-06T15:36:44","modified_gmt":"2021-12-06T13:36:44","slug":"vypusk-gipervizorov-xen-4-16-i-intel-cloud-hypervisor-20-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/vypusk-gipervizorov-xen-4-16-i-intel-cloud-hypervisor-20-0","title":{"rendered":"Lan\u00e7amento dos hipervisores Xen 4.16 e Intel Cloud Hypervisor 20.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Ap\u00f3s oito meses de desenvolvimento, foi lan\u00e7ado o hypervisor livre Xen 4.16. O desenvolvimento desta nova vers\u00e3o contou com a participa\u00e7\u00e3o de empresas como Amazon, Arm, Bitdefender, Citrix e EPAM Systems. O lan\u00e7amento de atualiza\u00e7\u00f5es para a vers\u00e3o Xen 4.16 ir\u00e1 continuar at\u00e9 2 de junho de 2023, enquanto a publica\u00e7\u00e3o de corre\u00e7\u00f5es de vulnerabilidades ser\u00e1 at\u00e9 2 de dezembro de 2024.      <\/p>\n<p>Principais mudan\u00e7as no Xen 4.16:   <\/p>\n<ul>\n<li class=\"l\"> No TPM Manager, que suporta chips virtuais para armazenamento de chaves criptogr\u00e1ficas (vTPM), implementados com base em um TPM f\u00edsico comum (Trusted Platform Module), foram realizadas corre\u00e7\u00f5es para permitir o suporte \u00e0 especifica\u00e7\u00e3o TPM 2.0.\n<li class=\"l\"> A depend\u00eancia da camada PV Shim foi aumentada, aplicada para executar sistemas operacionais convidados paravirtualizados n\u00e3o modificados (PV) em ambientes PVH e HVM. Futuramente, o uso de sistemas operacionais convidados paravirtualizados de 32 bits ser\u00e1 poss\u00edvel apenas no modo PV Shim, o que permitir\u00e1 reduzir o n\u00famero de \u00e1reas no hypervisor onde podem existir vulnerabilidades.\n<li class=\"l\"> Foi adicionada a possibilidade de inicializa\u00e7\u00e3o em dispositivos Intel sem um temporizador program\u00e1vel (PIT, Programmable Interval Timer).\n<li class=\"l\"> A limpeza de componentes obsoletos foi realizada, a constru\u00e7\u00e3o padr\u00e3o do c\u00f3digo &#171;qemu-xen-traditional&#187; e do PV-Grub foi interrompida (a necessidade de dados espec\u00edficos para forks do Xen desapareceu ap\u00f3s a transfer\u00eancia das altera\u00e7\u00f5es com suporte ao Xen para a composi\u00e7\u00e3o principal do QEMU e Grub).\n<li class=\"l\"> Para sistemas operacionais convidados com arquitetura ARM, foi implementado o suporte inicial a contadores de desempenho virtualizados (Performance Monitor Counters).\n<li class=\"l\"> Melhorou-se o suporte ao modo dom0less, permitindo operar sem a necessidade de implantar um ambiente dom0 durante a inicializa\u00e7\u00e3o <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pt\/vps\/\"   title=\"m\u00e1quinas virtuais\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2079\">m\u00e1quinas virtuais<\/a> na fase inicial de boot do servidor. As altera\u00e7\u00f5es implementadas permitiram o suporte a sistemas ARM de 64 bits com firmware EFI.\n<li class=\"l\"> Foi melhorado o suporte a sistemas heterog\u00eaneos de 64 bits ARM baseados na arquitetura big.LITTLE, combinando em um \u00fanico chip n\u00facleos poderosos, mas que consomem muita energia, e n\u00facleos menos poderosos, mas mais eficientes em termos de energia.    <\/ul>\n<p>Ao mesmo tempo, a Intel lan\u00e7ou a vers\u00e3o 20.0 do hipervisor Cloud Hypervisor, constru\u00eddo a partir dos componentes do projeto conjunto Rust-VMM, que tamb\u00e9m conta com a participa\u00e7\u00e3o da Alibaba, Amazon, Google e Red Hat. O Rust-VMM \u00e9 escrito na linguagem Rust e permite a cria\u00e7\u00e3o de hipervisores espec\u00edficos para tarefas determinadas. O Cloud Hypervisor \u00e9 um desses hipervisores, que oferece um monitor de m\u00e1quinas virtuais (VMM) de alto n\u00edvel, operando sobre KVM e otimizado para resolver problemas t\u00edpicos de sistemas em nuvem. O c\u00f3digo do projeto est\u00e1 dispon\u00edvel sob a licen\u00e7a Apache 2.0.    <\/p>\n<p>O Cloud Hypervisor \u00e9 focado na execu\u00e7\u00e3o de distribui\u00e7\u00f5es Linux modernas utilizando dispositivos paravirtualizados baseados em virtio. As principais metas incluem: alta responsividade, baixo consumo de mem\u00f3ria, alto desempenho, simplifica\u00e7\u00e3o de configura\u00e7\u00e3o e redu\u00e7\u00e3o de poss\u00edveis vetores de ataque. O suporte \u00e0 emula\u00e7\u00e3o \u00e9 minimizado, com \u00eanfase na paravirtualiza\u00e7\u00e3o. Atualmente, apenas sistemas x86_64 s\u00e3o suportados, mas est\u00e1 previsto o suporte para AArch64. No que diz respeito aos sistemas convidados, atualmente s\u00e3o suportadas apenas vers\u00f5es de 64 bits do Linux. A configura\u00e7\u00e3o de CPU, mem\u00f3ria, PCI e NVDIMM \u00e9 realizada na fase de constru\u00e7\u00e3o. A migra\u00e7\u00e3o de m\u00e1quinas virtuais entre anfitri\u00f5es tamb\u00e9m \u00e9 prevista. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pt\/server\/dts-dusseldorf\/\"   title=\"servidores\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3446\">servidores<\/a>.       <\/p>\n<p>Na nova vers\u00e3o:  <\/p>\n<ul>\n<li class=\"l\">  Para as arquiteturas x86_64 e aarch64, agora \u00e9 permitido criar at\u00e9 16 segmentos PCI, o que aumenta o n\u00famero total de dispositivos PCI permitidos de 31 para 496.\n<li class=\"l\"> Foi implementado o suporte para o vincula\u00e7\u00e3o de vCPUs a n\u00facleos f\u00edsicos de CPU (CPU pinning). Para cada vCPU, agora \u00e9 poss\u00edvel definir um conjunto restrito de CPUs hospedeiras nas quais sua execu\u00e7\u00e3o \u00e9 permitida, o que pode ser \u00fatil ao refletir recursos da m\u00e1quina hospedeira e da m\u00e1quina virtual de forma 1:1, ou ao executar uma m\u00e1quina virtual em um n\u00f3 espec\u00edfico NUMA.\n<li class=\"l\"> Melhorou-se o suporte \u00e0 virtualiza\u00e7\u00e3o de entrada\/sa\u00edda. Cada regi\u00e3o VFIO agora pode ser mapeada na mem\u00f3ria, reduzindo o n\u00famero de opera\u00e7\u00f5es de sa\u00edda da m\u00e1quina virtual e permitindo um aumento no desempenho da pass-through de dispositivos para a m\u00e1quina virtual.\n<li class=\"l\"> No c\u00f3digo em Rust, foi realizado um trabalho de substitui\u00e7\u00e3o de se\u00e7\u00f5es unsafe por implementa\u00e7\u00f5es alternativas executadas em modo safe. Para as se\u00e7\u00f5es unsafe restantes, foram adicionados coment\u00e1rios detalhados explicando por que o c\u00f3digo unsafe deixado pode ser considerado seguro.  <\/ul>\n<p>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=56278\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 \u0432\u043e\u0441\u044c\u043c\u0438 \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 4.16. \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 \u0438 EPAM Systems. \u0412\u044b\u043f\u0443\u0441\u043a \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0439 \u0434\u043b\u044f \u0432\u0435\u0442\u043a\u0438 Xen 4.16 \u043f\u0440\u043e\u0434\u043b\u0438\u0442\u0441\u044f \u0434\u043e 2 \u0438\u044e\u043d\u044f 2023 \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 2 \u0434\u0435\u043a\u0430\u0431\u0440\u044f 2024 \u0433\u043e\u0434\u0430. \u041a\u043b\u044e\u0447\u0435\u0432\u044b\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0432 Xen 4.16: \u0412 TPM Manager, [&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-102492","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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