KVM: x86: Add emulation for MSR_IA32_MCx_CTL2 MSRs.

KVM: x86: Add emulation for MSR_IA32_MCx_CTL2 MSRs.

This patch adds the emulation of IA32_MCi_CTL2 registers to KVM. A
separate mci_ctl2_banks array is used to keep the existing mce_banks
register layout intact.

In Machine Check Architecture, in addition to MCG_CMCI_P, bit 30 of
the per-bank register IA32_MCi_CTL2 controls whether Corrected Machine
Check error reporting is enabled.

Signed-off-by: Jue Wang <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
Message-Id: <20220610171134[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>