Re: [PATCH 09/11] KVM: x86: Treat x2APIC's ICR as a 64-bit register, not two 32-bit regs

[Chao Gao]

> 	case APIC_SELF_IPI:
>-		if (apic_x2apic_mode(apic)) {
>-			kvm_lapic_reg_write(apic, APIC_ICR,
>-					    APIC_DEST_SELF | (val & APIC_VECTOR_MASK));
>-		} else
>+		if (apic_x2apic_mode(apic))
>+			kvm_x2apic_icr_write(apic, APIC_DEST_SELF | (val & APIC_VECTOR_MASK));
>+		else

The original code looks incorrect. Emulating writes to SELF_IPI by writes to
ICR has an unwanted side-effect: the value of ICR in vAPIC page gets changed.

It is better to use kvm_apic_send_ipi() directly.