Messages in this thread | | | Date | Mon, 20 Feb 2023 09:59:29 -0800 | From | Josh Poimboeuf <> | Subject | Re: [PATCH RESEND] x86/speculation: Fix user-mode spectre-v2 protection with KERNEL_IBRS |
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On Mon, Feb 20, 2023 at 06:46:04PM +0100, Borislav Petkov wrote: > On Mon, Feb 20, 2023 at 08:34:42AM -0800, Josh Poimboeuf wrote: > > We will never enable IBRS in user space. We tried that years ago and it > > was very slow. > > Then I don't know what this is trying to fix. > > We'd need a proper bug statement in the commit message what the problem > is. As folks have established, the hw vuln mess is a whole universe of > crazy. So without proper documenting, this spaghetti madness will be > completely unreadable.
Agreed, and there seems to be a lot of confusion around this patch. I think I understand the issue, let me write up a new patch which is hopefully clearer.
-- Josh
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