perf/x86: Hybrid PMU support for extra_regs

mainline inclusion
from mainline-v5.13-rc1
commit 183af736
category: feature
feature: SRF core PMU support
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I8RWG5
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=183af7366b4e813ee4e0b995ff731e3ac28251f0



Intel-SIG: commit 183af736 perf/x86: Hybrid PMU support for extra_regs
Backport as a dependency for Sierra Forrest core PMU support.

-------------------------------------

Different hybrid PMU may have different extra registers, e.g. Core PMU
may have offcore registers, frontend register and ldlat register. Atom
core may only have offcore registers and ldlat register. Each hybrid PMU
should use its own extra_regs.

An Intel Hybrid system should always have extra registers.
Unconditionally allocate shared_regs for Intel Hybrid system.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Link: https://lkml.kernel.org/r/1618237865-33448-11-git-send-email-kan.liang@linux.intel.com


Signed-off-by: Yunying Sun <yunying.sun@intel.com>