[PATCH v5 4/4] mm: support Svnapot in huge vmap

[Qinglin Pan]

Hi Conor,

On 10/5/22 2:46 AM, Conor Dooley wrote:
> On Mon, Oct 03, 2022 at 09:47:21PM +0800, panqinglin2020 at iscas.ac.cn wrote:
>> From: Qinglin Pan <panqinglin2020 at iscas.ac.cn>
>>
>> The HAVE_ARCH_HUGE_VMAP option can be used to help implement arch
>> special huge vmap size. This commit selects this option by default and
>> re-writes the arch_vmap_pte_range_map_size for Svnapot 64KB size.
>>
>> It can be tested when booting kernel in qemu with pci device, which
>> will make the kernel to call pci driver using ioremap, and the
>> re-written function will be called.
>>
>> Signed-off-by: Qinglin Pan <panqinglin2020 at iscas.ac.cn>
>>
>> diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
>> index 3d5ec1391046..571f77b16ee8 100644
>> --- a/arch/riscv/Kconfig
>> +++ b/arch/riscv/Kconfig
>> @@ -70,6 +70,7 @@ config RISCV
>>   	select GENERIC_TIME_VSYSCALL if MMU && 64BIT
>>   	select GENERIC_VDSO_TIME_NS if HAVE_GENERIC_VDSO
>>   	select HAVE_ARCH_AUDITSYSCALL
>> +	select HAVE_ARCH_HUGE_VMAP
> 
> Maybe you should take a look at the following patchset and see how your
> code interacts with it:
> https://lore.kernel.org/linux-riscv/20220915065027.3501044-1-liushixin2@huawei.com/
> 
> Possible you may have some feedback for Liu Shixin or get some ideas :)
> 
> Thanks,
> Conor.
> 

Will have a look at it and to interact with it:)
Thanks for your information again : )

Qinglin.