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

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Date:   Wed, 19 Apr 2023 17:01:55 +0800
From:   Tianrui Zhao <zhaotianrui@...ngson.cn>
To:     Huacai Chen <chenhuacai@...nel.org>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        WANG Xuerui <kernel@...0n.name>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        loongarch@...ts.linux.dev, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, Jens Axboe <axboe@...nel.dk>,
        Mark Brown <broonie@...nel.org>,
        Alex Deucher <alexander.deucher@....com>,
        Oliver Upton <oliver.upton@...ux.dev>, maobibo@...ngson.cn,
        Xi Ruoyao <xry111@...111.site>,
        kernel test robot <lkp@...el.com>
Subject: Re: [PATCH v7 29/30] LoongArch: KVM: Enable kvm config and add the
 makefile



在 2023年04月19日 10:10, Huacai Chen 写道:
> Hi, Tianrui,
>
> On Mon, Apr 17, 2023 at 6:00 PM Tianrui Zhao <zhaotianrui@...ngson.cn> wrote:
>> 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 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
Thanks, I will move it to the suitable place.

Thanks
Tianrui Zhao
>>   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
>>