Change Details

Tested this on desktop-class machine where IOAPIC does not make PCI appearence, and on the Skylake server. There currently the DMAR scope entries for uncore IOAPICs still have length two and since no bus renumbering occured, the PCI rid and scope rid are equal. I checked that legacy interrupts still work: ``` flix1a% vmstat -i | grep -v cpu interrupt total rate irq3: uart1 134 0 irq16: xhci0 255 1 irq264: em0:rxq0 449 1 irq265: em0:rxq1 66307 169 irq266: em0:aq 2 0 ``` Also apparently PCI BARs for IOAPICs are not mapped. The attach process triggers the resource allocation. ``` flix1a% dmesg | grep BAR0 ioapic0: pci0:133:5:4 pci BAR0@e0f00000 id 0 MADT id 0 paddr@fec00000 ioapic1: pci0:174:5:4 pci BAR0@ee700000 id 1 MADT id 1 paddr@fec01000 ioapic2: pci0:215:5:4 pci BAR0@fbf00000 id 2 MADT id 2 paddr@fec08000 ```

Tested this on desktop-class machine where IOAPIC does not make PCI appearence, and on the Skylake server. There currently the DMAR scope entries for uncore IOAPICs still have length two and since no bus renumbering occured, the PCI rid and scope rid are equal. I checked that legacy interrupts still work: ``` flix1a% vmstat -i | grep -v cpu interrupt total rate irq0: attimer0 2434 21 irq3: uart1 247 2 irq16: xhci0 292 3 irq257: dmar0:qi 1 0 irq259: dmar1:qi 1 0 irq261: dmar2:qi 79202 690 irq263: dmar3:qi 1 0 irq265: dmar4:qi 1 0 irq267: dmar5:qi 1 0 irq269: dmar6:qi 1 0 irq271: dmar7:qi 141 1 irq280: em0:rxq0 70915 618 irq281: em0:rxq1 218 2 irq282: em0:aq 2 0 Total 290485 2530 ``` Also apparently PCI BARs for IOAPICs are not mapped. The attach process triggers the resource allocation. ``` flix1a% dmesg | grep BAR0 ioapic0: pci0:133:5:4 pci BAR0@e0f00000 id 0 MADT id 0 paddr@fec00000 ioapic1: pci0:174:5:4 pci BAR0@ee700000 id 1 MADT id 1 paddr@fec01000 ioapic2: pci0:215:5:4 pci BAR0@fbf00000 id 2 MADT id 2 paddr@fec08000 ```

Tested this on desktop-class machine where IOAPIC does not make PCI appearence, and on the Skylake server. There currently the DMAR scope entries for uncore IOAPICs still have length two and since no bus renumbering occured, the PCI rid and scope rid are equal. I checked that legacy interrupts still work: ``` flix1a% vmstat -i | grep -v cpu interrupt total rate irq3: uart1 irq0: attimer0 12434 021 irq16: xhci0irq3: uart1 25547 12 irq264: em0:rxq0irq16: xhci0 449 292 13 irq265: em0:rxq157: dmar0:qi 66307 1 169 0 irq266: em0:aq 2 59: dmar1:qi 1 0 irq261: dmar2:qi 79202 690 irq263: dmar3:qi 1 0 irq265: dmar4:qi 1 0 irq267: dmar5:qi 1 0 irq269: dmar6:qi 1 0 irq271: dmar7:qi 141 1 irq280: em0:rxq0 70915 618 irq281: em0:rxq1 218 2 irq282: em0:aq 2 0 Total 290485 2530 ``` Also apparently PCI BARs for IOAPICs are not mapped. The attach process triggers the resource allocation. ``` flix1a% dmesg | grep BAR0 ioapic0: pci0:133:5:4 pci BAR0@e0f00000 id 0 MADT id 0 paddr@fec00000 ioapic1: pci0:174:5:4 pci BAR0@ee700000 id 1 MADT id 1 paddr@fec01000 ioapic2: pci0:215:5:4 pci BAR0@fbf00000 id 2 MADT id 2 paddr@fec08000 ```