Re: [PATCH v7 29/30] LoongArch: KVM: Enable kvm config and add the makefile

[Huacai Chen]

Hi, Tianrui,

On Mon, Apr 17, 2023 at 6:00 PM Tianrui Zhao <zhaotianrui@xxxxxxxxxxx> wrote:
>
> Enable loongarch kvm config and add the makefile to support build kvm
> module.
>
> Reported-by: kernel test robot <lkp@xxxxxxxxx>
> Link: https://lore.kernel.org/oe-kbuild-all/202304131526.iXfLaVZc-lkp@xxxxxxxxx/
> Signed-off-by: Tianrui Zhao <zhaotianrui@xxxxxxxxxxx>
> ---
>  arch/loongarch/Kbuild                      |  1 +
>  arch/loongarch/Kconfig                     |  2 ++
>  arch/loongarch/configs/loongson3_defconfig |  2 ++
>  arch/loongarch/kvm/Kconfig                 | 38 ++++++++++++++++++++++
>  arch/loongarch/kvm/Makefile                | 22 +++++++++++++
>  5 files changed, 65 insertions(+)
>  create mode 100644 arch/loongarch/kvm/Kconfig
>  create mode 100644 arch/loongarch/kvm/Makefile
>
> diff --git a/arch/loongarch/Kbuild b/arch/loongarch/Kbuild
> index b01f5cdb27e0..40be8a1696f9 100644
> --- a/arch/loongarch/Kbuild
> +++ b/arch/loongarch/Kbuild
> @@ -2,6 +2,7 @@ obj-y += kernel/
>  obj-y += mm/
>  obj-y += net/
>  obj-y += vdso/
> +obj-y += kvm/
>
>  # for cleaning
>  subdir- += boot
> diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
> index 7fd51257e0ed..f9beeb2e0cc9 100644
> --- a/arch/loongarch/Kconfig
> +++ b/arch/loongarch/Kconfig
> @@ -148,6 +148,7 @@ config LOONGARCH
>         select USE_PERCPU_NUMA_NODE_ID
>         select USER_STACKTRACE_SUPPORT
>         select ZONE_DMA32
> +       select HAVE_KVM
Use alpha-betical order, please.

Huacai
>
>  config 32BIT
>         bool
> @@ -588,3 +589,4 @@ source "drivers/acpi/Kconfig"
>  endmenu
>
>  source "drivers/firmware/Kconfig"
> +source "arch/loongarch/kvm/Kconfig"
> diff --git a/arch/loongarch/configs/loongson3_defconfig b/arch/loongarch/configs/loongson3_defconfig
> index e18213f01cc4..c99520374aef 100644
> --- a/arch/loongarch/configs/loongson3_defconfig
> +++ b/arch/loongarch/configs/loongson3_defconfig
> @@ -63,6 +63,8 @@ CONFIG_EFI_ZBOOT=y
>  CONFIG_EFI_GENERIC_STUB_INITRD_CMDLINE_LOADER=y
>  CONFIG_EFI_CAPSULE_LOADER=m
>  CONFIG_EFI_TEST=m
> +CONFIG_VIRTUALIZATION=y
> +CONFIG_KVM=m
>  CONFIG_MODULES=y
>  CONFIG_MODULE_FORCE_LOAD=y
>  CONFIG_MODULE_UNLOAD=y
> diff --git a/arch/loongarch/kvm/Kconfig b/arch/loongarch/kvm/Kconfig
> new file mode 100644
> index 000000000000..8a999b4c0232
> --- /dev/null
> +++ b/arch/loongarch/kvm/Kconfig
> @@ -0,0 +1,38 @@
> +# SPDX-License-Identifier: GPL-2.0
> +#
> +# KVM configuration
> +#
> +
> +source "virt/kvm/Kconfig"
> +
> +menuconfig VIRTUALIZATION
> +       bool "Virtualization"
> +       help
> +         Say Y here to get to see options for using your Linux host to run
> +         other operating systems inside virtual machines (guests).
> +         This option alone does not add any kernel code.
> +
> +         If you say N, all options in this submenu will be skipped and
> +         disabled.
> +
> +if VIRTUALIZATION
> +
> +config KVM
> +       tristate "Kernel-based Virtual Machine (KVM) support"
> +       depends on HAVE_KVM
> +       select MMU_NOTIFIER
> +       select ANON_INODES
> +       select PREEMPT_NOTIFIERS
> +       select KVM_MMIO
> +       select KVM_GENERIC_DIRTYLOG_READ_PROTECT
> +       select HAVE_KVM_VCPU_ASYNC_IOCTL
> +       select HAVE_KVM_EVENTFD
> +       select SRCU
> +       help
> +         Support hosting virtualized guest machines using hardware
> +         virtualization extensions. You will need a fairly processor
> +         equipped with virtualization extensions.
> +
> +         If unsure, say N.
> +
> +endif # VIRTUALIZATION
> diff --git a/arch/loongarch/kvm/Makefile b/arch/loongarch/kvm/Makefile
> new file mode 100644
> index 000000000000..2335e873a6ef
> --- /dev/null
> +++ b/arch/loongarch/kvm/Makefile
> @@ -0,0 +1,22 @@
> +# SPDX-License-Identifier: GPL-2.0
> +#
> +# Makefile for LOONGARCH KVM support
> +#
> +
> +ccflags-y += -I $(srctree)/$(src)
> +
> +include $(srctree)/virt/kvm/Makefile.kvm
> +
> +obj-$(CONFIG_KVM) += kvm.o
> +
> +kvm-y += main.o
> +kvm-y += vm.o
> +kvm-y += vmid.o
> +kvm-y += tlb.o
> +kvm-y += mmu.o
> +kvm-y += vcpu.o
> +kvm-y += exit.o
> +kvm-y += interrupt.o
> +kvm-y += timer.o
> +kvm-y += switch.o
> +kvm-y += csr_ops.o
> --
> 2.31.1
>