From: Wei Liu <wei.liu@xxxxxxxxxx> Sent: Monday, November 14, 2022 5:59 AM > > On Fri, Nov 11, 2022 at 02:53:59PM -0800, Nuno Das Neves wrote: > > On 11/11/2022 9:58 AM, Michael Kelley (LINUX) wrote: > > > From: Wei Liu <wei.liu@xxxxxxxxxx> Sent: Friday, November 11, 2022 9:27 AM > [...] > > > > I've tested this patch on these Azure SKUs: > > - Standard_D2S_v2 (intel xapic) > > - Standard_D4ds_v4 (intel xapic) > > - Standard_D4ds_v5 (intel x2apic) > > - Standard_D4ads_v5 (amd xapic) > > > > I've tested with linux Dom0 (nested hyperv root partition) and as a > > regular L1 guest. > > > > Okay. I think your tests are good. > > Michael, do you have any further concern? > If ms_hyperv_msi_ext_dest_id() returns "true", then hyperv_prepare_irq_remapping() will still return -ENODEV and you won't get interrupt remapping because it isn't needed, at least not for guest VMs. Is that what we want for the root partition? Or does ms_hyperv_msi_ext_dest_id() only return true in a guest partition, and not in the root partition? See commit d981059e13ff. Michael
