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Message-ID: <CABgObfZt+bEV2Ho5guX3=2eqJnBxt01D5tp6J-_VZuK1=JiWew@mail.gmail.com>
Date: Tue, 31 Oct 2023 15:09:17 +0100
From: Paolo Bonzini <pbonzini@...hat.com>
To: Huacai Chen <chenhuacai@...ngson.cn>
Cc: Huacai Chen <chenhuacai@...nel.org>, kvm@...r.kernel.org,
loongarch@...ts.linux.dev, linux-kernel@...r.kernel.org,
Xuerui Wang <kernel@...0n.name>,
Jiaxun Yang <jiaxun.yang@...goat.com>
Subject: Re: [GIT PULL] LoongArch KVM changes for v6.7
On Thu, Oct 5, 2023 at 11:28 AM Huacai Chen <chenhuacai@...ngson.cn> 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
>
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