This series adds the interrupt remapping support for amd-iommu device.
IOMMU spec is available at: https://support.amd.com/TechDocs/48882_IOMMU.pdf
To enable the interrupt remap use below qemu cli
# $QEMU \
-device amd-iommu,intremap=on
I have tested FC-28 and Ubuntu 18.04 guest.
Linux guest bootup log shows the interrupt remap supports:
[root@localhost ~]# dmesg | grep -i AMD-Vi
[ 0.001761] AMD-Vi: Using IVHD type 0x10
[ 0.003051] AMD-Vi: device: 00:03.0 cap: 0040 seg: 0 flags: d1 info 0000
[ 0.004007] AMD-Vi: mmio-addr: 00000000fed80000
[ 0.004874] AMD-Vi: DEV_ALL flags: 00
[ 0.006236] AMD-Vi: DEV_SPECIAL(IOAPIC[0]) devid: 00:14.0
[ 0.667943] AMD-Vi: Found IOMMU at 0000:00:03.0 cap 0x40
[ 0.668727] AMD-Vi: Extended features (0x29d3):
[ 0.669874] AMD-Vi: Interrupt remapping enabled
[ 0.671074] AMD-Vi: Lazy IO/TLB flushing enabled
cat /proc/interrupts confirms that its using IR
[root@localhost ~]# cat /proc/interrupts
CPU0
0: 40 IR-IO-APIC 2-edge timer
1: 9 IR-IO-APIC 1-edge i8042
4: 1770 IR-IO-APIC 4-edge ttyS0
7: 0 IR-IO-APIC 7-edge parport0
8: 1 IR-IO-APIC 8-edge rtc0
9: 0 IR-IO-APIC 9-fasteoi acpi
12: 15 IR-IO-APIC 12-edge i8042
16: 0 IR-IO-APIC 16-fasteoi i801_smbus
24: 0 PCI-MSI 49152-edge AMD-Vi
25: 13070 IR-PCI-MSI 512000-edge ahci[0000:00:1f.2]
26: 86 IR-PCI-MSI 32768-edge enp0s2-rx-0
27: 139 IR-PCI-MSI 32769-edge enp0s2-tx-0
28: 1 IR-PCI-MSI 32770-edge enp0s2
NMI: 0 Non-maskable interrupts
LOC: 26686 Local timer interrupts
SPU: 0 Spurious interrupts
...
...
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Cc: Tom Lendacky <Thomas.Lendacky@amd.com>
Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Brijesh Singh (6):
x86_iommu: move the kernel-irqchip check in common code
x86_iommu/amd: Prepare for interrupt remap support
x86_iommu/amd: Add interrupt remap support when VAPIC is not enabled
i386: acpi: add IVHD device entry for IOAPIC
x86_iommu/amd: Add interrupt remap support when VAPIC is enabled
x86_iommu/amd: Enable Guest virtual APIC support
hw/i386/acpi-build.c | 23 +++-
hw/i386/amd_iommu.c | 360 ++++++++++++++++++++++++++++++++++++++++++++++++++
hw/i386/amd_iommu.h | 115 +++++++++++++++-
hw/i386/intel_iommu.c | 7 -
hw/i386/trace-events | 14 ++
hw/i386/x86-iommu.c | 9 ++
6 files changed, 516 insertions(+), 12 deletions(-)
--
2.7.4