From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: tlb flush after each vm_exit, also virtual interrupts injection
Date: Mon, 29 Aug 2016 18:39:56 +0200
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Cc: "Charls D. Chap" <chapcharls@gmail.com>, kvm <kvm@vger.kernel.org>
To: Wanpeng Li <kernellwp@gmail.com>
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On 29/08/2016 12:22, Wanpeng Li wrote:
>>> >> patches which will update gsi routing after changed MSI-X
>>> >> configuration(https://patchwork.kernel.org/patch/6827431/)
>>> >> , so why set MSI routing entry again during send MSI?
>> >
>> > KVM_SIGNAL_MSI does not need a previous KVM_SET_GSI_ROUTING, but if
>> > userspace wants it can use both.  Note that you've linked a patch for
>> > lkvm, not Linux or QEMU.
> Do you mean that MSI/MSI-X don't necessary have a routing table?

Generally it's not if you don't use irqfd.

Paolo