{"id":115180,"date":"2024-04-19T14:30:12","date_gmt":"2024-04-19T12:30:12","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/dlya-xen-razvivaetsya-mehanizm-paravirtualizaczii-iommu"},"modified":"2024-04-19T14:30:12","modified_gmt":"2024-04-19T12:30:12","slug":"dlya-xen-razvivaetsya-mehanizm-paravirtualizaczii-iommu","status":"publish","type":"post","link":"https:\/\/prohoster.info\/es\/blog\/news\/dlya-xen-razvivaetsya-mehanizm-paravirtualizaczii-iommu","title":{"rendered":"Se desarrolla un mecanismo de paravirtualizaci\u00f3n IOMMU para Xen","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Los desarrolladores del proyecto XCP-NG, que desarrolla una plataforma libre para implementar y gestionar la infraestructura en la nube, han presentado el proyecto PV-IOMMU, que permite a los sistemas invitados acceder a funcionalidades limitadas de IOMMU, implementadas utilizando la infraestructura de paravirtualizaci\u00f3n de Xen. En la pr\u00e1ctica, PV-IOMMU se puede utilizar para implementar la protecci\u00f3n DMA en Dom0 o para garantizar el soporte de la subsistema del n\u00facleo de Linux VFIO. Anteriormente, el hipervisor Xen utilizaba IOMMU para la asignaci\u00f3n de acceso a dispositivos PCI y limitar el acceso de los dispositivos a la memoria, pero por razones de estabilidad y seguridad, los sistemas invitados no pod\u00edan acceder directamente al bloque IOMMU proporcionado por el hardware. <\/p>\n

IOMMU es un bloque especializado de control de memoria que realiza la traducci\u00f3n de direcciones virtuales, visibles para el dispositivo hardware, a direcciones f\u00edsicas, permitiendo la ejecuci\u00f3n y el filtrado de operaciones DMA a trav\u00e9s de direcciones virtuales, as\u00ed como la limitaci\u00f3n e aislamiento de operaciones de entrada\/salida. En el contexto de la virtualizaci\u00f3n, IOMMU permite a los sistemas hu\u00e9spedes acceder directamente a dispositivos perif\u00e9ricos, como adaptadores Ethernet, tarjetas gr\u00e1ficas y controladores de almacenamiento. La implementaci\u00f3n de IOMMU de Intel se conoce como VT-d (\"Virtualization Technology for Directed I\/O\"), AMD como AMD-Vi (I\/O Virtualization), y ARM como SMMU (System Memory Management Unit). <\/p>\n

La implementaci\u00f3n paravirtualizada propuesta (PV-IOMMU) permite a los sistemas invitados utilizar las capacidades b\u00e1sicas de IOMMU, pero abstrae todos los detalles de hardware de bajo nivel. Se ha propuesto un nuevo hiperl llamado HYPERVISOR_iommu_op (an\u00e1logo a las llamadas del sistema para hipervisores) para ser utilizado por los sistemas invitados para ejecutar operaciones de IOMMU. Entre otras cosas, los sistemas invitados ahora pueden crear y modificar dominios<\/a> IOMMU (dominio IOMMU), denominado en Xen como contextos IOMMU para evitar confusiones con el t\u00e9rmino \"dominio\" en Xen. Los contextos IOMMU permiten organizar el acceso del sistema hu\u00e9sped a la memoria de los dispositivos y especificar las operaciones de traducci\u00f3n de memoria aplicables a uno o varios dispositivos. <\/p>\n

En la etapa actual de desarrollo, PV-IOMMU solo soporta la tecnolog\u00eda Intel VT-d, pero pronto se planea a\u00f1adir soporte para AMD-Vi y SMMUv3.
\n
Fuente: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 XCP-NG, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u044e\u0449\u0435\u0433\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u0443\u044e \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0443 \u0434\u043b\u044f \u0440\u0430\u0437\u0432\u0435\u0440\u0442\u044b\u0432\u0430\u043d\u0438\u044f \u0438 \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0440\u0430\u0431\u043e\u0442\u043e\u0439 \u043e\u0431\u043b\u0430\u0447\u043d\u043e\u0439 \u0438\u043d\u0444\u0440\u0430\u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u043e\u0439, \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u043b\u0438 \u043f\u0440\u043e\u0435\u043a\u0442 PV-IOMMU, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0439 \u0433\u043e\u0441\u0442\u0435\u0432\u044b\u043c \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u043c \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u0434\u043e\u0441\u0442\u0443\u043f \u043a \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u043d\u043e\u0439 \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u0438 IOMMU, \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u043e\u0439 \u0441 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c \u0438\u043d\u0444\u0440\u0430\u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u044b \u043f\u0430\u0440\u0430\u0432\u0438\u0440\u0442\u0443\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 Xen. \u041d\u0430 \u043f\u0440\u0430\u043a\u0442\u0438\u043a\u0435 PV-IOMMU \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0442\u044c\u0441\u044f \u0434\u043b\u044f \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u0437\u0430\u0449\u0438\u0442\u044b DMA \u0432 Dom0 \u0438\u043b\u0438 \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u044b \u044f\u0434\u0440\u0430 Linux VFIO. \u0420\u0430\u043d\u0435\u0435 \u0433\u0438\u043f\u0435\u0440\u0432\u0438\u0437\u043e\u0440 Xen \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043b IOMMU \u0434\u043b\u044f […]<\/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-115180","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47 Se est\u00e1 desarrollando un mecanismo de paravirtualizaci\u00f3n IOMMU para Xen | 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