Re: [Qemu-devel] [PATCH v12 00/27] IOMMU: Enable interrupt remapping for Intel IOMMU

[Peter Xu]

On Thu, Sep 22, 2016 at 10:29:39AM +0200, Igor Mammedov wrote:
> On Thu, 14 Jul 2016 13:56:09 +0800
> Peter Xu <address@hidden> wrote:
> 
> > This is v12 for Intel IR. Rebased to lastest master, with some tiny
> > tweaks from v11. Please check changelog below.
> 
> Hi Peter,
> 
> While testing current master 9b8595bc with merged IR remapping
> and default IDE disk as following:
> 
> qemu-system-x86_64 --enable-kvm -m 2G -snapshot -M q35 \
>   -smp 1,sockets=7,cores=32,threads=1,maxcpus=240 \
>   -device qemu64-x86_64-cpu,socket-id=1,core-id=30,thread-id=0 \
>   -device intel-iommu,intremap=on -machine kernel_irqchip=split \
>   rhel73_disk.img

I failed to reproduce the issue here. Is it reproducable on your side?

Also, could I know the version of host kernel and kvm?

> 
> I see errors, on QEMU stderr:
> 
> KVM: injection failed, MSI lost (Operation not permitted)

There are more than one place that dumps this. From the IO error in
dmsg, I think IDE should be trying to inject the MSI but the ioctl()
failed with -EPERM, which is strange.

-- peterx