Re: [PATCH v3 01/19] x86/msr-index: Clean up bit defines for IA32_FEATURE_CONTROL MSR

Sean Christopherson
2019-11-21T22:14:14Z

On Thu, Nov 21, 2019 at 11:46:14AM +0200, Jarkko Sakkinen wrote:
> On Mon, Nov 18, 2019 at 07:12:22PM -0800, Sean Christopherson wrote:
> > As pointed out by Boris, the defines for bits in IA32_FEATURE_CONTROL
> > are quite a mouthful, especially the VMX bits which must differentiate
> > between enabling VMX inside and outside SMX (TXT) operation. Rename the
> > bit defines to abbreviate FEATURE_CONTROL as FEAT_CTL so that they're a
> > little friendlier on the eyes. Keep the full name for the MSR itself to
> > help even the most obtuse reader decipher the abbreviation, and to match
> > the name used by the Intel SDM.
>
> If you anyway shorten the prefix, why not then go directly to FT_CTL?
> It is as obvious as FEAT_CTL is. Given the exhausting long variable
> names like FEAT_CTL_VMX_ENABLED_OUTSIDE_SMX this would be worth of
> considering.

If we're going to rename the function and file, I think we should stick
with the slightly longer FEAT_CTL. FT_CTL for the bits is ok since there
is more context to work with, but init_ft_ctl_msr() looks weird to me.