Re: [PATCH 2/4] swiotlb: Add a new cc-swiotlb implementation for Confidential VMs

Guorui Yu
2023-01-29T01:54:46Z

Hi Randy,

在 2023/1/29 00:41, Randy Dunlap 写道:
> Hi--
>
> On 1/28/23 00:32, GuoRui.Yu wrote:
>> diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig
>> index 56866aaa2ae1..7e6b20d2091f 100644
>> --- a/kernel/dma/Kconfig
>> +++ b/kernel/dma/Kconfig
>> @@ -78,8 +78,18 @@ config ARCH_HAS_FORCE_DMA_UNENCRYPTED
>>
>> config SWIOTLB
>> bool
>> + depends on !CC_SWIOTLB
>> select NEED_DMA_MAP_STATE
>>
>> +config CC_SWIOTLB
>> + bool "Enable cc-swiotlb for Confidential VMs"
>> + default n
>> + select NEED_DMA_MAP_STATE
>> + help
>> + This enables a cc-swiotlb implementation for Confidential VMs,
>> + which allows allocating the SWIOTLB buffer allocation on runtime.
>
> Two "allocat..." words seems to be redundant. Probably the second one
> can be dropped.
> Also, instead of "on runtime", how about "at runtime"?

Thanks for your kindly advice, and I will fix it in the next version.

>
>> + If unsure, say "n".
>
> Thanks.

Sincerely,
Guorui