Ukwenzela iiprosesa kuluhlu olubanzi lweArmv8-A (Cortex-A) yezakhiwo ubuthathaka bayo obubodwa kuhlaselo lwetshaneli esecaleni kusetyenziswa iialgorithms zekhompuyutha eziqikelelwayo. I-ARM ngokwayo ichaze oku kwaye ibonelele ngeepetshi kunye nezikhokelo zokunciphisa ubuthathaka obufunyenweyo. Ingozi ayinkulu kangako, kodwa ayinakungahoywa, kuba iiprosesa ezisekwe kuyilo lwe-ARM zikuyo yonke indawo, nto leyo eyenza umngcipheko wokuvuza ungacingeleki ngokweziphumo.
Ukuba sesichengeni okufunyenwe ziingcali zikaGoogle kuyilo lwe-ARM kwabizwa ngokuba yi-Straight-Line Speculation (SLS) kwaye yonyulwa ngokusemthethweni i-CVE-2020-13844. Ngokwe-ARM, ukuba semngciphekweni kwe-SLS luhlobo lweSpecter vulnerability, ethi (kunye nokuba sesichengeni kwe-Meltdown) kwaziwa ngokubanzi ngoJanuwari ka-2018. Ngamanye amagama, obu bubuthathaka obuqhelekileyo kwiindlela zokuqikelela zekhompyuter kunye nohlaselo lwetshaneli esecaleni.
Icomputing eqikelelwayo ifuna ukusetyenzwa kwedatha kwangaphambili kunye namasebe amaninzi anokubakho, nangona ezi zinokulahlwa kamva njengokungeyomfuneko. Uhlaselo olusecaleni lwesitishi luvumela idatha ephakathi ukuba ibiwe ngaphambi kokuba itshatyalaliswe ngokupheleleyo. Ngenxa yoko, sineeprosesa ezinamandla kunye nomngcipheko wokuvuza kwedatha.
Uhlaselo lwe-Straight-Speculation ye-Straight-based processors kwi-ARM-based processors ibangela ukuba iprosesa, nanini na kukho utshintsho kumzila wokufundisa, ukutshintshela ekwenzeni imiyalelo efunyenwe ngokuthe ngqo kwimemori, endaweni yokulandela imiyalelo kumzila omtsha womyalelo. Ngokucacileyo, le ayisiyiyo eyona meko ilungileyo yokukhetha imiyalelo oza kuyenza, enokuthi isetyenziswe ngumhlaseli.
Kwityala layo, i-ARM ayikhuphanga kuphela isikhokelo somphuhlisi ukunceda ukuthintela umngcipheko wokuvuza ngohlaselo lweNgcalo-Ngcalo oluNqobileyo, kodwa ikwabonelela ngeepatches kwiinkqubo ezinkulu zokusebenza ezifana neFreeBSD, OpenBSD, Trusted Firmware-A kunye ne-OP-TEE, kwaye yakhupha iipetshi ze-GCC kunye ne-LLVM abahlanganisi.
Inkampani iphinde yathi ukusetyenziswa kweepatches akuyi kuchaphazela ukusebenza kwamaqonga e-ARM, njengoko kwenzekile kwiiplatifti ze-Intel ezihambelanayo ne-x86 kunye nobuthathaka beSpecter kunye ne-Meltdown buvaliwe. Nangona kunjalo, siya kukwazi ukufunda malunga noku kwimithombo yomntu wesithathu, eya kunika umfanekiso ocacileyo wobuthathaka obutsha.
umthombo: 3dnews.ru