From: Wanpeng Li <[email protected]> Only bits 0, 1, and 3 are settable, others are reserved for APIC_TDCR. Let's record the settable value in the virtual apic page.
Signed-off-by: Wanpeng Li <[email protected]> --- arch/x86/kvm/lapic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 4ce2ddd..8f7a14d 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -2068,7 +2068,7 @@ int kvm_lapic_reg_write(struct kvm_lapic *apic, u32 reg, u32 val) case APIC_TDCR: { uint32_t old_divisor = apic->divide_count; - kvm_lapic_set_reg(apic, APIC_TDCR, val); + kvm_lapic_set_reg(apic, APIC_TDCR, val & 0xb); update_divide_count(apic); if (apic->divide_count != old_divisor && apic->lapic_timer.period) { -- 2.7.4
