Messages in this thread | | | Date | Thu, 13 Aug 2009 20:24:42 -0300 | From | Kevin Winchester <> | Subject | Re: [PATCH v3] x86: clear incorrectly forced X86_FEATURE_LAHF_LM flag |
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Borislav Petkov wrote: > Hi Kevin, > > On Wed, Aug 12, 2009 at 08:02:14PM -0300, Kevin Winchester wrote: >> So that feature is definitely set. > > thanks for testing. As a reply to that follow two patches for you to > test. The one is adding some more msr functionality and the second is > based on your original one which should in addition turn off the cpuid > bit. Please apply, compile, reboot and run the small app again to verify > that ECX[0] is now off. > > Let me know how it goes. >
Yes, those patches seem to fix everything:
$ ./a.out 0x8000_0001_ecx = 0x00000000
I just noticed that my original patch has been pulled into Linus' tree, so you will likely want to rebase your patches on top of that.
Thank you again,
-- Kevin Winchester
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