{"id":31672,"date":"2019-10-31T21:42:29","date_gmt":"2019-10-31T18:42:29","guid":{"rendered":"https:\/\/prohoster.info\/blog\/proekt-netbsd-razvivaet-novyj-gipervizor-nvmm\/"},"modified":"2019-10-31T21:42:29","modified_gmt":"2019-10-31T18:42:29","slug":"proekt-netbsd-razvivaet-novyj-gipervizor-nvmm","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/proekt-netbsd-razvivaet-novyj-gipervizor-nvmm","title":{"rendered":"A NetBSD projekt egy \u00faj NVMM hipervizort fejleszt.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A NetBSD projekt fejleszt\u0151i bejelentett\u00e9k<\/a><\/noindex> a \u00faj hipervizor \u00e9s az ahhoz kapcsol\u00f3d\u00f3 virtualiz\u00e1ci\u00f3s r\u00e9teg l\u00e9trehoz\u00e1s\u00e1r\u00f3l, amely m\u00e1r be van \u00e9p\u00edtve a NetBSD-current k\u00eds\u00e9rleti \u00e1gba, \u00e9s a NetBSD 9 stabil kiad\u00e1s\u00e1ban is el\u00e9rhet\u0151 lesz. Az NVMM egyel\u0151re csak az x86_64 architekt\u00fara t\u00e1mogat\u00e1s\u00e1val rendelkezik, \u00e9s k\u00e9t backendet k\u00edn\u00e1l a hardveres virtualiz\u00e1ci\u00f3s mechanizmusok kihaszn\u00e1l\u00e1s\u00e1ra: x86-SVM az AMD CPU virtualiz\u00e1ci\u00f3s kiterjeszt\u00e9s\u00e9vel \u00e9s x86-VMX az Intel CPU eset\u00e9ben. A jelenlegi form\u00e1j\u00e1ban egy gazdag\u00e9pen ak\u00e1r 128 virtu\u00e1lis g\u00e9p is futtathat\u00f3, mindegyik\u00fck sz\u00e1m\u00e1ra legfeljebb 256 virtu\u00e1lis processzormagot (VCPU) \u00e9s 128 GB RAM-ot biztos\u00edtva. <\/p>\n

Az NVMM tartalmaz egy drivert, amely a rendszer kernel szintj\u00e9n m\u0171k\u00f6dik, \u00e9s koordin\u00e1lja a hardveres virtualiz\u00e1ci\u00f3s mechanizmusokhoz val\u00f3 hozz\u00e1f\u00e9r\u00e9st, valamint a Libnvmm stack-et, amely felhaszn\u00e1l\u00f3i m\u00f3dban fut. Az kernel \u00e9s a felhaszn\u00e1l\u00f3i t\u00e9r k\u00f6z\u00f6tti interakci\u00f3 IOCTL-on kereszt\u00fcl t\u00f6rt\u00e9nik. Az NVMM saj\u00e1toss\u00e1ga, amely megk\u00fcl\u00f6nb\u00f6zteti m\u00e1s hipervizorokt\u00f3l, mint pl. a KVM, HAXM<\/a><\/noindex> \u00e9s Bhyve, az, hogy a kernel szintj\u00e9n csak a sz\u00fcks\u00e9ges minim\u00e1lis interf\u00e9sz fut a hardveres virtualiz\u00e1ci\u00f3s mechanizmusok k\u00f6r\u00fcl, m\u00edg az \u00f6sszes hardveremul\u00e1tor k\u00f3d \u00e1tker\u00fclt a felhaszn\u00e1l\u00f3i t\u00e9rbe. Ez a megk\u00f6zel\u00edt\u00e9s cs\u00f6kkenti a magas privilegiz\u00e1lts\u00e1g\u00fa k\u00f3dban v\u00e9grehajtott k\u00f3d mennyis\u00e9g\u00e9t, \u00e9s cs\u00f6kkenti a teljes rendszer kompromitt\u00e1l\u00e1s\u00e1nak kock\u00e1zat\u00e1t a hipervizor sebezhet\u0151s\u00e9geiben t\u00f6rt\u00e9nt t\u00e1mad\u00e1sok eset\u00e9n. Ezen k\u00edv\u00fcl jelent\u0151sen egyszer\u0171s\u00edti a projekt hibakeres\u00e9s\u00e9t \u00e9s fuzzing tesztel\u00e9s\u00e9t. <\/p>\n

A Libnvmm mag\u00e1nak nem tartalmaz emul\u00e1l\u00f3 funkci\u00f3kat, hanem egy API-t biztos\u00edt, amely lehet\u0151v\u00e9 teszi az NVMM t\u00e1mogat\u00e1s\u00e1nak integr\u00e1l\u00e1s\u00e1t megl\u00e9v\u0151 emul\u00e1torokba, p\u00e9ld\u00e1ul a QEMU-ba. Az API olyan funkci\u00f3kat foglal mag\u00e1ban, mint a virtu\u00e1lis g\u00e9p l\u00e9trehoz\u00e1sa \u00e9s ind\u00edt\u00e1sa, a vend\u00e9g rendszer mem\u00f3ri\u00e1j\u00e1nak kioszt\u00e1sa \u00e9s a VCPU-k eloszt\u00e1sa. A biztons\u00e1g n\u00f6vel\u00e9se \u00e9s a lehets\u00e9ges t\u00e1mad\u00e1si fel\u00fcletek cs\u00f6kkent\u00e9se \u00e9rdek\u00e9ben a libnvmm csak a kifejezetten k\u00e9rt funkci\u00f3kat biztos\u00edt \u2014 alap\u00e9rtelmezetten a bonyolult kezel\u0151k nem h\u00edv\u00f3dnak meg automatikusan, \u00e9s lehet, hogy egy\u00e1ltal\u00e1n nem alkalmazz\u00e1k \u0151ket, ha n\u00e9lk\u00fcl\u00fck is meg lehet oldani. Az NVMM igyekszik egyszer\u0171 megold\u00e1sokkal dolgozni, elker\u00fclve a bonyolults\u00e1got, \u00e9s lehet\u0151v\u00e9 t\u00e9ve, hogy min\u00e9l t\u00f6bb munkafolyamatot ellen\u0151rizhess\u00fcnk.<\/p>\n

\"A<\/a><\/noindex><\/center><\/p>\n

A mag k\u00f6vetkez\u0151 szintj\u00e9n m\u0171k\u00f6d\u0151 NVMM szoros integr\u00e1ci\u00f3ban \u00e1ll a NetBSD kernel\u00e9vel, lehet\u0151v\u00e9 t\u00e9ve a teljes\u00edtm\u00e9ny n\u00f6vel\u00e9s\u00e9t a vend\u00e9g oper\u00e1ci\u00f3s rendszer \u00e9s a gazda k\u00f6rnyezet k\u00f6z\u00f6tti kontextusv\u00e1lt\u00e1sok sz\u00e1m\u00e1nak cs\u00f6kkent\u00e9s\u00e9vel. A felhaszn\u00e1l\u00f3i t\u00e9rben a libnvmm megpr\u00f3b\u00e1lja aggreg\u00e1lni a tipikus bemeneti-kimeneti m\u0171veleteket, \u00e9s sz\u00fcks\u00e9gtelen\u00fcl nem h\u00edvja meg a rendszerszolg\u00e1ltat\u00e1sokat. A mem\u00f3riaallok\u00e1l\u00f3 rendszer a pmap alrendszeren alapul, lehet\u0151v\u00e9 t\u00e9ve a vend\u00e9g rendszerek mem\u00f3ri\u00e1j\u00e1nak lapjainak elt\u00e1vol\u00edt\u00e1s\u00e1t a swap ter\u00fcletre mem\u00f3riahi\u00e1ny eset\u00e9n. Az NVMM mentes a glob\u00e1lis z\u00e1rol\u00e1sokt\u00f3l \u00e9s j\u00f3l sk\u00e1l\u00e1zhat\u00f3, lehet\u0151v\u00e9 t\u00e9ve, hogy k\u00fcl\u00f6nb\u00f6z\u0151 CPU magokat haszn\u00e1ljanak k\u00fcl\u00f6nb\u00f6z\u0151 vend\u00e9g virtu\u00e1lis g\u00e9pek futtat\u00e1s\u00e1ra. <\/p>\n

A QEMU alapjaira \u00e9p\u00edtve l\u00e9trehoztak egy megold\u00e1st, amely az NVMM-et haszn\u00e1lja a hardveres virtualiz\u00e1ci\u00f3s mechanizmusok aktiv\u00e1l\u00e1s\u00e1ra. Dolgoznak az elk\u00e9sz\u00edtett jav\u00edt\u00e1sok QEMU f\u0151 \u00e1llom\u00e1ny\u00e1ba val\u00f3 integr\u00e1l\u00e1s\u00e1n. A QEMU + NVMM m\u00e1r MMM-DD-YYYY<\/a><\/noindex> sikeresen k\u00e9pes vend\u00e9g rendszerek ind\u00edt\u00e1s\u00e1ra FreeBSD, OpenBSD, Linux, Windows XP\/7\/8.1\/10 \u00e9s m\u00e1s oper\u00e1ci\u00f3s rendszerek alatt az x86_64 rendszereken AMD \u00e9s Intel processzorokkal (az NVMM nem k\u00f6t\u0151dik egy adott architekt\u00far\u00e1hoz, p\u00e9ld\u00e1ul a megfelel\u0151 h\u00e1tt\u00e9r l\u00e9trehoz\u00e1sakor ARM64 rendszereken is m\u0171k\u00f6dhet). A NVMM tov\u00e1bbi alkalmaz\u00e1si ter\u00fcletei k\u00f6z\u00e9 tartozik az alkalmaz\u00e1sok sandbox-izol\u00e1ci\u00f3ja.<\/p>\n

\"A<\/a><\/noindex><\/center><\/p>\n

<\/a><\/noindex><\/p>\n

Forr\u00e1s: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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