Messages in this thread | | | From | Jue Wang <> | Date | Fri, 18 Feb 2022 09:39:14 -0800 | Subject | Re: [PATCH v2] x86/mce: work around an erratum on fast string copy instructions. |
| |
On Fri, Feb 18, 2022 at 9:16 AM Borislav Petkov <bp@alien8.de> wrote: > > On Fri, Feb 18, 2022 at 08:21:36AM -0800, Jue Wang wrote: > > My concern was that here returns 0 instead the value read from the msr. > > You'd walk into that code only if you're doing MCE injections. In that > case, it won't read or write MSR_IA32_MISC_ENABLE because the injection > code writes into the injection mce struct only. > > So it won't disable fast strings when you manage to inject the exact > error type which triggers this erratum. > > I think that's actually a good thing - you don't want to disable fast > strings just because you injected a particular MCE type.
Ok, makes good sense.
Thanks Boris!
-Jue > > > -- > Regards/Gruss, > Boris. > > https://people.kernel.org/tglx/notes-about-netiquette
| |