This series adds in-kernel AIA irqchip to KVM RISC-V which trap-n-emulate IMSIC and APLIC MSI-mode for Guest. The APLIC MSI-mode trap-n-emulate is optional so KVM user space can emulate APLIC entirely in user space. The use of IMSIC HW guest files to accelerate IMSIC virtualization will be done as separate series since this depends on AIA irqchip drivers to be upstreamed. This series has no dependency on the AIA irqchip drivers. There is also a KVM AIA irq-bypass (or device MSI virtualization) series under development which depends on this series and upcoming IOMMU driver series. These patches (or this series) can also be found in the riscv_kvm_aia_irqchip_v2 branch at: https://github.com/avpatel/linux.git Changes since v1: - Rebased on Linux-6.4-rc6 - Addressed Atish's comment in PATCH6 - Added comments in arch/riscv/include/uapi/asm/kvm.h about APLIC and IMSIC device attribute type Anup Patel (10): RISC-V: KVM: Implement guest external interrupt line management RISC-V: KVM: Add IMSIC related defines RISC-V: KVM: Add APLIC related defines RISC-V: KVM: Set kvm_riscv_aia_nr_hgei to zero RISC-V: KVM: Skeletal in-kernel AIA irqchip support RISC-V: KVM: Implement device interface for AIA irqchip RISC-V: KVM: Add in-kernel emulation of AIA APLIC RISC-V: KVM: Expose APLIC registers as attributes of AIA irqchip RISC-V: KVM: Add in-kernel virtualization of AIA IMSIC RISC-V: KVM: Expose IMSIC registers as attributes of AIA irqchip arch/riscv/include/asm/kvm_aia.h | 107 ++- arch/riscv/include/asm/kvm_aia_aplic.h | 58 ++ arch/riscv/include/asm/kvm_aia_imsic.h | 38 + arch/riscv/include/asm/kvm_host.h | 4 + arch/riscv/include/uapi/asm/kvm.h | 72 ++ arch/riscv/kvm/Kconfig | 4 + arch/riscv/kvm/Makefile | 3 + arch/riscv/kvm/aia.c | 274 +++++- arch/riscv/kvm/aia_aplic.c | 617 ++++++++++++++ arch/riscv/kvm/aia_device.c | 672 +++++++++++++++ arch/riscv/kvm/aia_imsic.c | 1083 ++++++++++++++++++++++++ arch/riscv/kvm/main.c | 3 +- arch/riscv/kvm/vcpu.c | 2 + arch/riscv/kvm/vm.c | 115 +++ include/uapi/linux/kvm.h | 2 + 15 files changed, 3021 insertions(+), 33 deletions(-) create mode 100644 arch/riscv/include/asm/kvm_aia_aplic.h create mode 100644 arch/riscv/include/asm/kvm_aia_imsic.h create mode 100644 arch/riscv/kvm/aia_aplic.c create mode 100644 arch/riscv/kvm/aia_device.c create mode 100644 arch/riscv/kvm/aia_imsic.c -- 2.34.1
