On 08/10/2015 20:34, Radim Krčmář wrote:
> 2015-10-08 20:30+0200, Radim Krčmář:
>> On real hardware, edge-triggered interrupts don't set a bit in TMR,
>> which means that IOAPIC isn't notified on EOI. Do the same here.
>>
>> Staying in guest/kernel mode after edge EOI is what we want for most
>> devices. If some bugs could be nicely worked around with edge EOI
>> notifications, we should invest in a better interface.
>>
>> Signed-off-by: Radim Krčmář <rkrcmar@xxxxxxxxxx>
>> ---
>> Completely untested.
>>
>> diff --git a/arch/x86/kvm/irq_comm.c b/arch/x86/kvm/irq_comm.c
>> @@ -389,13 +389,15 @@ void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)
>> for (i = 0; i < nr_ioapic_pins; ++i) {
>> hlist_for_each_entry(entry, &table->map[i], link) {
>> u32 dest_id, dest_mode;
>> + bool level;
>>
>> if (entry->type != KVM_IRQ_ROUTING_MSI)
>> continue;
>> dest_id = (entry->msi.address_lo >> 12) & 0xff;
>> dest_mode = (entry->msi.address_lo >> 2) & 0x1;
>> - if (kvm_apic_match_dest(vcpu, NULL, 0, dest_id,
>> - dest_mode)) {
>> + level = entry->msi.data & MSI_DATA_TRIGGER_LEVEL;
>> + if (level && kvm_apic_match_dest(vcpu, NULL, 0,
>
> Describing that result is an overkill -- I'll send v2 if the idea is
> accepted.
It's okay and it matches the other lines before. I'm applying this too,
but I would appreciate Steve's Tested-by before moving it to kvm/next.
Paolo
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