Messages in this thread | | | Subject | Re: [PATCH 6/7] x86/spec_ctrl: Add sysctl knobs to enable/disable SPEC_CTRL feature | From | Tim Chen <> | Date | Thu, 4 Jan 2018 11:02:31 -0800 |
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On 01/04/2018 10:34 AM, Andrea Arcangeli wrote: > On Thu, Jan 04, 2018 at 09:56:47AM -0800, Tim Chen wrote: >> There are 2 ways to control IBRS >> >> 1. At boot time >> noibrs kernel boot parameter will disable IBRS usage >> >> Otherwise if the above parameters are not specified, the system >> will enable ibrs and ibpb usage if the cpu supports it. >> >> 2. At run time >> echo 0 > /sys/kernel/debug/ibrs_enabled will turn off IBRS >> echo 1 > /sys/kernel/debug/ibrs_enabled will turn on IBRS in kernel >> echo 2 > /sys/kernel/debug/ibrs_enabled will turn on IBRS in both userspace and kernel > > debug/x86/? > > Reviewed-by: Andrea Arcangeli <aarcange@redhat.com> > > Thanks, > Andrea >
Yes, will correct.
Thanks.
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