linux-kernel - Re: [PATCH v12 29/31] LoongArch: KVM: Enable kvm config and add the makefile

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Date:   Tue, 6 Jun 2023 10:37:52 +0800
From:   "bibo, mao" <maobibo@...ngson.cn>
To:     Tianrui Zhao <zhaotianrui@...ngson.cn>,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Huacai Chen <chenhuacai@...nel.org>,
        WANG Xuerui <kernel@...0n.name>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        loongarch@...ts.linux.dev, Jens Axboe <axboe@...nel.dk>,
        Mark Brown <broonie@...nel.org>,
        Alex Deucher <alexander.deucher@....com>,
        Oliver Upton <oliver.upton@...ux.dev>,
        Xi Ruoyao <xry111@...111.site>,
        kernel test robot <lkp@...el.com>
Subject: Re: [PATCH v12 29/31] LoongArch: KVM: Enable kvm config and add the
 makefile

Reviewed-by: Bibo, Mao <maobibo@...ngson.cn>

在 2023/5/30 09:52, Tianrui Zhao 写道:
> Enable LoongArch kvm config and add the makefile to support build kvm
> module.
> 
> Reported-by: kernel test robot <lkp@...el.com>
> Link: https://lore.kernel.org/oe-kbuild-all/202304131526.iXfLaVZc-lkp@intel.com/
> Signed-off-by: Tianrui Zhao <zhaotianrui@...ngson.cn>
> ---
>  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 d38b066fc931..16ddf4f6f9bd 100644
> --- a/arch/loongarch/Kconfig
> +++ b/arch/loongarch/Kconfig
> @@ -113,6 +113,7 @@ config LOONGARCH
>  	select HAVE_KPROBES
>  	select HAVE_KPROBES_ON_FTRACE
>  	select HAVE_KRETPROBES
> +	select HAVE_KVM
>  	select HAVE_MOD_ARCH_SPECIFIC
>  	select HAVE_NMI
>  	select HAVE_PCI
> @@ -604,3 +605,4 @@ 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 6cd26dd3c134..3c0cbe6ad08f 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