Re: [GIT PULL] LoongArch KVM changes for v6.7

[Paolo Bonzini]

On Thu, Oct 5, 2023 at 11:28 AM Huacai Chen <chenhuacai@xxxxxxxxxxx> wrote:
>
> The following changes since commit 8a749fd1a8720d4619c91c8b6e7528c0a355c0aa:
>
>   Linux 6.6-rc4 (2023-10-01 14:15:13 -0700)
>
> are available in the Git repository at:
>
>   git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson.git tags/loongarch-kvm-6.7
>
> for you to fetch changes up to 2c10cda4b777be4be9d9e69e4f70c818dbb15e21:
>
>   LoongArch: KVM: Add maintainers for LoongArch KVM (2023-10-02 10:01:29 +0800)

Pulled, thanks.

Paolo

>
> ----------------------------------------------------------------
> LoongArch KVM changes for v6.7
>
> Add LoongArch's KVM support. Loongson 3A5000/3A6000 supports hardware
> assisted virtualization. With cpu virtualization, there are separate
> hw-supported user mode and kernel mode in guest mode. With memory
> virtualization, there are two-level hw mmu table for guest mode and host
> mode. Also there is separate hw cpu timer with consant frequency in
> guest mode, so that vm can migrate between hosts with different freq.
> Currently, we are able to boot LoongArch Linux guests.
>
> Few key aspects of KVM LoongArch added by this series are:
> 1. Enable kvm hardware features when kvm module is loaded.
> 2. Implement VM and vcpu related ioctl interface such as vcpu create,
>    vcpu run etc. GET_ONE_REG/SET_ONE_REG ioctl commands are use to
>    get general registers one by one.
> 3. Hardware access about MMU, timer and csr are emulated in kernel.
> 4. Hardwares such as mmio and iocsr device are emulated in user space
>    such as IPI, irqchips, pci devices etc.
>
> ----------------------------------------------------------------
> Tianrui Zhao (25):
>       LoongArch: KVM: Add kvm related header files
>       LoongArch: KVM: Implement kvm module related interface
>       LoongArch: KVM: Implement kvm hardware enable, disable interface
>       LoongArch: KVM: Implement VM related functions
>       LoongArch: KVM: Add vcpu related header files
>       LoongArch: KVM: Implement basic vcpu interfaces
>       LoongArch: KVM: Implement basic vcpu ioctl interfaces
>       LoongArch: KVM: Implement fpu operations for vcpu
>       LoongArch: KVM: Implement vcpu interrupt operations
>       LoongArch: KVM: Implement vcpu load and vcpu put operations
>       LoongArch: KVM: Implement misc vcpu related interfaces
>       LoongArch: KVM: Implement vcpu timer operations
>       LoongArch: KVM: Implement virtual machine tlb operations
>       LoongArch: KVM: Implement kvm mmu operations
>       LoongArch: KVM: Implement handle csr exception
>       LoongArch: KVM: Implement handle iocsr exception
>       LoongArch: KVM: Implement handle idle exception
>       LoongArch: KVM: Implement handle gspr exception
>       LoongArch: KVM: Implement handle mmio exception
>       LoongArch: KVM: Implement handle fpu exception
>       LoongArch: KVM: Implement kvm exception vectors
>       LoongArch: KVM: Implement vcpu world switch
>       LoongArch: KVM: Enable kvm config and add the makefile
>       LoongArch: KVM: Supplement kvm document about LoongArch-specific part
>       LoongArch: KVM: Add maintainers for LoongArch KVM
>
>  Documentation/virt/kvm/api.rst             |  70 ++-
>  MAINTAINERS                                |  12 +
>  arch/loongarch/Kbuild                      |   2 +
>  arch/loongarch/Kconfig                     |   6 +
>  arch/loongarch/configs/loongson3_defconfig |   2 +
>  arch/loongarch/include/asm/inst.h          |  16 +
>  arch/loongarch/include/asm/kvm_csr.h       | 211 +++++++
>  arch/loongarch/include/asm/kvm_host.h      | 237 ++++++++
>  arch/loongarch/include/asm/kvm_mmu.h       | 139 +++++
>  arch/loongarch/include/asm/kvm_types.h     |  11 +
>  arch/loongarch/include/asm/kvm_vcpu.h      |  93 +++
>  arch/loongarch/include/asm/loongarch.h     |  19 +-
>  arch/loongarch/include/uapi/asm/kvm.h      | 108 ++++
>  arch/loongarch/kernel/asm-offsets.c        |  32 +
>  arch/loongarch/kvm/Kconfig                 |  40 ++
>  arch/loongarch/kvm/Makefile                |  22 +
>  arch/loongarch/kvm/exit.c                  | 696 +++++++++++++++++++++
>  arch/loongarch/kvm/interrupt.c             | 183 ++++++
>  arch/loongarch/kvm/main.c                  | 420 +++++++++++++
>  arch/loongarch/kvm/mmu.c                   | 914 ++++++++++++++++++++++++++++
>  arch/loongarch/kvm/switch.S                | 250 ++++++++
>  arch/loongarch/kvm/timer.c                 | 197 ++++++
>  arch/loongarch/kvm/tlb.c                   |  32 +
>  arch/loongarch/kvm/trace.h                 | 162 +++++
>  arch/loongarch/kvm/vcpu.c                  | 939 +++++++++++++++++++++++++++++
>  arch/loongarch/kvm/vm.c                    |  94 +++
>  include/uapi/linux/kvm.h                   |   9 +
>  27 files changed, 4902 insertions(+), 14 deletions(-)
>  create mode 100644 arch/loongarch/include/asm/kvm_csr.h
>  create mode 100644 arch/loongarch/include/asm/kvm_host.h
>  create mode 100644 arch/loongarch/include/asm/kvm_mmu.h
>  create mode 100644 arch/loongarch/include/asm/kvm_types.h
>  create mode 100644 arch/loongarch/include/asm/kvm_vcpu.h
>  create mode 100644 arch/loongarch/include/uapi/asm/kvm.h
>  create mode 100644 arch/loongarch/kvm/Kconfig
>  create mode 100644 arch/loongarch/kvm/Makefile
>  create mode 100644 arch/loongarch/kvm/exit.c
>  create mode 100644 arch/loongarch/kvm/interrupt.c
>  create mode 100644 arch/loongarch/kvm/main.c
>  create mode 100644 arch/loongarch/kvm/mmu.c
>  create mode 100644 arch/loongarch/kvm/switch.S
>  create mode 100644 arch/loongarch/kvm/timer.c
>  create mode 100644 arch/loongarch/kvm/tlb.c
>  create mode 100644 arch/loongarch/kvm/trace.h
>  create mode 100644 arch/loongarch/kvm/vcpu.c
>  create mode 100644 arch/loongarch/kvm/vm.c
>