This series adds RISC-V support for the generic KVM_PRE_FAULT_MEMORY vcpu ioctl and enables the existing generic KVM selftest for RISC-V.
KVM_PRE_FAULT_MEMORY lets userspace ask KVM to populate stage-2 mappings for a GPA range before running a vCPU that is expected to access that range. x86 already supports the ioctl; RISC-V currently falls back to normal first-touch G-stage faults. Patch 1 implements the RISC-V arch hook using the existing G-stage map path. Patch 2 fixes the RISC-V selftest page-table walker for Sv57, which can be selected as the default guest mode. Patch 3 enables pre_fault_memory_test for RISC-V. Tested with pre_fault_memory_test on a RISC-V KVM host. Jinyu Tang (3): KVM: riscv: Implement KVM_PRE_FAULT_MEMORY KVM: selftests: Add RISC-V Sv57 page table indexing KVM: selftests: Enable pre_fault_memory_test for RISC-V arch/riscv/kvm/Kconfig | 1 + arch/riscv/kvm/gstage.c | 3 ++ arch/riscv/kvm/mmu.c | 33 +++++++++++++++++++ arch/riscv/kvm/vm.c | 1 + tools/testing/selftests/kvm/Makefile.kvm | 1 + .../selftests/kvm/include/riscv/processor.h | 6 ++++ .../selftests/kvm/lib/riscv/processor.c | 2 ++ .../selftests/kvm/pre_fault_memory_test.c | 3 ++ 8 files changed, 50 insertions(+) -- 2.43.0
