Messages in this thread | | | From | "Yu, Fenghua" <> | Subject | RE: [PATCH v3 08/10] x86/setcpuid: Add kernel option setcpuid | Date | Tue, 12 Feb 2019 17:52:55 +0000 |
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> From: Peter Zijlstra [mailto:peterz@infradead.org] > On Tue, Feb 12, 2019 at 02:51:00PM +0100, Thomas Gleixner wrote: > > On Tue, 12 Feb 2019, Peter Zijlstra wrote: > > > > > On Mon, Feb 11, 2019 at 11:16:43AM -0800, Fenghua Yu wrote: > > > > 4. The feature can be disabled by kernel option > > > > "clearcpuid=split_lock_detection" during early boot time. > > > > > > IFF clearcpuid lives, it should also employ CPUID faulting and clear > > > it for userspace too. > > > > We have it already, > > D'0h right, I thought that was introduced here, but that's just extending it > to multiple arguments.
In this patch set, patch #5 extends clearcpuid to support multiple options and Patch #6 extends clearcpuid to support cpu cap flag strings. So we already have string support and can use "clearcpuid=split_lock_detection" to disable the split lock feature at the boot time.
Thanks.
-Fenghua
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