x86/cpufeatures: Combine word 11 and 12 into a new scattered features word

x86/cpufeatures: Combine word 11 and 12 into a new scattered features word

It's a waste for the four X86_FEATURE_CQM_* feature bits to occupy two
whole feature bits words. To better utilize feature words, re-define
word 11 to host scattered features and move the four X86_FEATURE_CQM_*
features into Linux defined word 11. More scattered features can be
added in word 11 in the future.

Rename leaf 11 in cpuid_leafs to CPUID_LNX_4 to reflect it's a
Linux-defined leaf.

Rename leaf 12 as CPUID_DUMMY which will be replaced by a meaningful
name in the next patch when CPUID.7.1:EAX occupies world 12.

Maximum number of RMID and cache occupancy scale are retrieved from
CPUID.0xf.1 after scattered CQM features are enumerated. Carve out the
code into a separate function.

KVM doesn't support resctrl now. So it's safe to move the
X86_FEATURE_CQM_* features to scattered features word 11 for KVM.

Signed-off-by: Fenghua Yu <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Cc: Aaron Lewis <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Babu Moger <[email protected]>
Cc: "Chang S. Bae" <[email protected]>
Cc: "Sean J Christopherson" <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jann Horn <[email protected]>
Cc: Juergen Gross <[email protected]>
Cc: Konrad Rzeszutek Wilk <[email protected]>
Cc: kvm ML <[email protected]>
Cc: Masahiro Yamada <[email protected]>
Cc: Masami Hiramatsu <[email protected]>
Cc: Nadav Amit <[email protected]>
Cc: Paolo Bonzini <[email protected]>
Cc: Pavel Tatashin <[email protected]>
Cc: Peter Feiner <[email protected]>
Cc: "Peter Zijlstra (Intel)" <[email protected]>
Cc: "Radim Krčmář" <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>
Cc: Ravi V Shankar <[email protected]>
Cc: Sherry Hurwitz <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Thomas Lendacky <[email protected]>
Cc: x86 <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]