diff --git a/arch/x86/hyperv/hv_apic.c b/arch/x86/hyperv/hv_apic.c index 8eb6fbee8e135fdc9861c7a998fcbb11ca4e4077..5c056b8aebefc83468729d0a8bba6e171914c21e 100644 --- a/arch/x86/hyperv/hv_apic.c +++ b/arch/x86/hyperv/hv_apic.c @@ -86,6 +86,11 @@ static void hv_apic_write(u32 reg, u32 val) static void hv_apic_eoi_write(u32 reg, u32 val) { + struct hv_vp_assist_page *hvp = hv_vp_assist_page[smp_processor_id()]; + + if (hvp && (xchg(&hvp->apic_assist, 0) & 0x1)) + return; + wrmsr(HV_X64_MSR_EOI, val, 0); }