linux-dev/arch/riscv/kvm/Kconfig, branch master

RISC-V: KVM: Use generic guest entry infrastructure

2022-10-02T04:49:25Z

Use generic guest entry infrastructure to properly handle TIF_NOTIFY_RESUME. Signed-off-by: Jisheng Zhang Reviewed-by: Andrew Jones Signed-off-by: Anup Patel

riscv: do not select non-existing config ANON_INODES

2021-10-22T09:53:37Z

Commit 99cdc6c18c2d ("RISC-V: Add initial skeletal KVM support") selects the config ANON_INODES in config KVM, but the config ANON_INODES is removed since commit 5dd50aaeb185 ("Make anon_inodes unconditional") in 2018. Hence, ./scripts/checkkconfigsymbols.py warns on non-existing symbols: ANON_INODES Referencing files: arch/riscv/kvm/Kconfig Remove selecting the non-existing config ANON_INODES. Signed-off-by: Lukas Bulwahn Message-Id: <20211022061514.25946-1-lukas.bulwahn@gmail.com> Signed-off-by: Paolo Bonzini

RISC-V: KVM: Implement MMU notifiers

2021-10-04T10:33:39Z

This patch implements MMU notifiers for KVM RISC-V so that Guest physical address space is in-sync with Host physical address space. This will allow swapping, page migration, etc to work transparently with KVM RISC-V. Signed-off-by: Anup Patel Acked-by: Paolo Bonzini Reviewed-by: Paolo Bonzini Reviewed-by: Alexander Graf Acked-by: Palmer Dabbelt

RISC-V: KVM: Implement stage2 page table programming

2021-10-04T10:32:19Z

This patch implements all required functions for programming the stage2 page table for each Guest/VM. At high-level, the flow of stage2 related functions is similar from KVM ARM/ARM64 implementation but the stage2 page table format is quite different for KVM RISC-V. [jiangyifei: stage2 dirty log support] Signed-off-by: Yifei Jiang Signed-off-by: Anup Patel Acked-by: Paolo Bonzini Reviewed-by: Paolo Bonzini Acked-by: Palmer Dabbelt

RISC-V: KVM: Handle MMIO exits for VCPU

2021-10-04T10:21:47Z

We will get stage2 page faults whenever Guest/VM access SW emulated MMIO device or unmapped Guest RAM. This patch implements MMIO read/write emulation by extracting MMIO details from the trapped load/store instruction and forwarding the MMIO read/write to user-space. The actual MMIO emulation will happen in user-space and KVM kernel module will only take care of register updates before resuming the trapped VCPU. The handling for stage2 page faults for unmapped Guest RAM will be implemeted by a separate patch later. [jiangyifei: ioeventfd and in-kernel mmio device support] Signed-off-by: Yifei Jiang Signed-off-by: Anup Patel Acked-by: Paolo Bonzini Reviewed-by: Paolo Bonzini Reviewed-by: Alexander Graf Acked-by: Palmer Dabbelt

RISC-V: Add initial skeletal KVM support

2021-10-04T10:10:08Z

This patch adds initial skeletal KVM RISC-V support which has: 1. A simple implementation of arch specific VM functions except kvm_vm_ioctl_get_dirty_log() which will implemeted in-future as part of stage2 page loging. 2. Stubs of required arch specific VCPU functions except kvm_arch_vcpu_ioctl_run() which is semi-complete and extended by subsequent patches. 3. Stubs for required arch specific stage2 MMU functions. Signed-off-by: Anup Patel Acked-by: Paolo Bonzini Reviewed-by: Paolo Bonzini Reviewed-by: Alexander Graf Acked-by: Palmer Dabbelt