The RISC-V AIA specification is now frozen as-per the RISC-V international process. The latest frozen specifcation can be found at: https://github.com/riscv/riscv-aia/releases/download/1.0-RC3/riscv-interrupts-1.0-RC3.pdf This series implements first phase of AIA virtualization which targets virtualizing AIA CSRs. This also provides a foundation for the second phase of AIA virtualization which will target in-kernel AIA irqchip (including both IMSIC and APLIC). The first two patches are shared with the "Linux RISC-V AIA Support" series which adds AIA driver support. To test this series, use AIA drivers from the "Linux RISC-V AIA Support" series and use KVMTOOL from the riscv_aia_v1 branch at: https://github.com/avpatel/kvmtool.git These patches can also be found in the riscv_kvm_aia_csr_v4 branch at: https://github.com/avpatel/linux.git Based-on: 20230401112730.2105240-1-apatel@xxxxxxxxxxxxxxxx (https://lore.kernel.org/lkml/20230401112730.2105240-1-apatel@xxxxxxxxxxxxxxxx/) Based-on: 20230403121527.2286489-1-apatel@xxxxxxxxxxxxxxxx (https://lore.kernel.org/lkml/20230403121527.2286489-1-apatel@xxxxxxxxxxxxxxxx/) Changes since v3: - Split PATCH7 into two patches - Addressed comments in PATCH7, PATCH8 and PATCH9 Changes since v2: - Rebased on Linux-6.3-rc5 - Split PATCH5 into two separate patches as suggested by Atish. Changes since v1: - Addressed from Drew and Conor in PATCH1 - Use alphabetical ordering for SMAIA and SSAIA enum in PATCH2 - Use GENMASK() in PATCH3 Anup Patel (9): RISC-V: Add AIA related CSR defines RISC-V: Detect AIA CSRs from ISA string RISC-V: KVM: Drop the _MASK suffix from hgatp.VMID mask defines RISC-V: KVM: Initial skeletal support for AIA RISC-V: KVM: Implement subtype for CSR ONE_REG interface RISC-V: KVM: Add ONE_REG interface for AIA CSRs RISC-V: KVM: Use bitmap for irqs_pending and irqs_pending_mask RISC-V: KVM: Virtualize per-HART AIA CSRs RISC-V: KVM: Implement guest external interrupt line management arch/riscv/include/asm/csr.h | 107 ++++- arch/riscv/include/asm/hwcap.h | 8 + arch/riscv/include/asm/kvm_aia.h | 137 +++++++ arch/riscv/include/asm/kvm_host.h | 14 +- arch/riscv/include/uapi/asm/kvm.h | 18 +- arch/riscv/kernel/cpu.c | 2 + arch/riscv/kernel/cpufeature.c | 2 + arch/riscv/kvm/Makefile | 1 + arch/riscv/kvm/aia.c | 627 ++++++++++++++++++++++++++++++ arch/riscv/kvm/main.c | 23 +- arch/riscv/kvm/mmu.c | 3 +- arch/riscv/kvm/vcpu.c | 190 +++++++-- arch/riscv/kvm/vcpu_insn.c | 1 + arch/riscv/kvm/vm.c | 4 + arch/riscv/kvm/vmid.c | 4 +- 15 files changed, 1083 insertions(+), 58 deletions(-) create mode 100644 arch/riscv/include/asm/kvm_aia.h create mode 100644 arch/riscv/kvm/aia.c -- 2.34.1
