From mboxrd@z Thu Jan 1 00:00:00 1970 From: rminnich@gmail.com (ron minnich) Date: Wed, 03 Jan 2018 17:46:03 +0000 Subject: [TUHS] OT: critical Intel design flaw In-Reply-To: References: <20180103134358.3F16818C098@mercury.lcs.mit.edu> Message-ID: The type of kernel is orthogonal to this particular design flaw from what I know. It's about how page tables are set up for user mode processes. I may be wrong but pretty much every Unix or Unix-like kernel (including Plan 9) follows the page table model Windows and Linux use: the ring 0 PTEs are present in the page table, even in user mode, and we count on the architecture to prevent ring 3 access to ring 0 memory. This is certainly the case on all the ones I've worked on. I don't think a microkernel would save you. This is not a much ado about nothing case: it's early days and people can make it work: https://twitter.com/brainsmoke/status/948561799875502080 -------------- next part -------------- An HTML attachment was scrubbed... URL: