GICv2m is an extension to GICv2 defined in the Server Base System Architecture (SBSA) [1], allowing pre-GICv3 platforms to support MSIs. Presenting GICv2m frames to the guest can be useful for testing PCI pass-through on platforms that have a GICv2m, for example AMD Seattle. Otherwise they are forced to use legacy INTx. This series adds a GICv2m frame to kvmtool, which is basically an MMIO register telling the guest which SPIs (Shared Peripheral Interrupts) are reserved for MSIs. When configuring MSI vectors, the guest writes the desired SPI number into the MSI data field. Then in kvmtool we create the IRQFD routes such that they inject the given SPI. [1] https://developer.arm.com/products/architecture/a-profile/docs/den0029/latest/server-base-system-architecture Jean-Philippe Brucker (2): Prevent segfault when kvm_pause is called too early Add GICv2m support Makefile | 2 +- arm/aarch32/include/asm/kvm.h | 2 + arm/aarch64/include/asm/kvm.h | 2 + arm/gic.c | 13 +++ arm/gicv2m.c | 153 +++++++++++++++++++++++++++++++ arm/include/arm-common/gic.h | 3 + arm/include/arm-common/kvm-config-arch.h | 2 +- include/kvm/irq.h | 11 +++ irq.c | 68 +++++++++++--- kvm.c | 2 +- virtio/pci.c | 4 +- 11 files changed, 245 insertions(+), 17 deletions(-) create mode 100644 arm/gicv2m.c -- 2.14.3
