This patch set adds ITS emulation for 32-bit KVM.
I used Andrea's its/v8 branch at [1] for testing with the following
diff on top (it will be send separately)
diff --git a/arm/aarch32/arm-cpu.c b/arm/aarch32/arm-cpu.c
index 27a8e17..16bba55 100644
--- a/arm/aarch32/arm-cpu.c
+++ b/arm/aarch32/arm-cpu.c
@@ -12,7 +12,7 @@ static void generate_fdt_nodes(void *fdt, struct kvm *kvm)
{
int timer_interrupts[4] = {13, 14, 11, 10};
- gic__generate_fdt_nodes(fdt, IRQCHIP_GICV2);
+ gic__generate_fdt_nodes(fdt, kvm->cfg.arch.irqchip);
timer__generate_fdt_nodes(fdt, kvm, timer_interrupts);
}
diff --git a/arm/aarch32/include/kvm/kvm-arch.h b/arm/aarch32/include/kvm/kvm-arch.h
index 1632e3c..99231f6 100644
--- a/arm/aarch32/include/kvm/kvm-arch.h
+++ b/arm/aarch32/include/kvm/kvm-arch.h
@@ -1,8 +1,8 @@
#ifndef KVM__KVM_ARCH_H
#define KVM__KVM_ARCH_H
-#define ARM_GIC_DIST_SIZE 0x1000
-#define ARM_GIC_CPUI_SIZE 0x2000
+#define ARM_GIC_DIST_SIZE 0x100000
+#define ARM_GIC_CPUI_SIZE 0x200000
#define ARM_KERN_OFFSET(...) 0x8000
After passing --irqchip=gicv3-its --force-pci to kvmtool I can see
that MSI is used:
# cat /proc/interrupts
CPU0
18: 1251 GICv3 27 Level arch_timer
28: 0 ITS-MSI 49152 Edge virtio3-config
29: 0 ITS-MSI 49153 Edge virtio3-input
30: 0 ITS-MSI 49154 Edge virtio3-output
31: 0 ITS-MSI 32768 Edge virtio2-config
32: 2 ITS-MSI 32769 Edge virtio2-input.0
33: 1 ITS-MSI 32770 Edge virtio2-output.0
34: 0 ITS-MSI 0 Edge virtio0-config
35: 303 ITS-MSI 1 Edge virtio0-requests
36: 0 ITS-MSI 16384 Edge virtio1-config
37: 218 ITS-MSI 16385 Edge virtio1-requests
IPI0: 0 CPU wakeup interrupts
IPI1: 0 Timer broadcast interrupts
IPI2: 0 Rescheduling interrupts
IPI3: 0 Function call interrupts
IPI4: 0 CPU stop interrupts
IPI5: 0 IRQ work interrupts
IPI6: 0 completion interrupts
Err: 0
[1] git://www.linux-arm.org/kvmtool.git
Changelog:
RFC -> v1
- spilt ITS and vITS in separate patch sets
- added Reviewed-by from Andrea
Vladimir Murzin (2):
KVM: arm64: vgic-its: Fix compatability with 32-bit
ARM: KVM: Support vGICv3 ITS
Documentation/virtual/kvm/api.txt | 2 +-
arch/arm/include/uapi/asm/kvm.h | 2 ++
arch/arm/kvm/Kconfig | 1 +
arch/arm/kvm/Makefile | 1 +
arch/arm/kvm/arm.c | 6 ++++++
arch/arm64/kvm/Kconfig | 4 ----
arch/arm64/kvm/reset.c | 6 ------
include/linux/irqchip/arm-gic-v3.h | 8 ++++----
virt/kvm/arm/vgic/vgic-its.c | 11 ++++++-----
virt/kvm/arm/vgic/vgic-kvm-device.c | 2 --
virt/kvm/arm/vgic/vgic-mmio-v3.c | 2 --
virt/kvm/arm/vgic/vgic.h | 26 --------------------------
12 files changed, 21 insertions(+), 50 deletions(-)
--
1.7.9.5
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