Re: [PATCH v2 04/11] iommu/arm-smmu-v3: Split block descriptor when start dirty log

On 21-03-16 19:39:47, Keqian Zhu wrote: > Hi Yi, > > On 2021/3/16 17:17, Yi Sun wrote: > > On 21-03-10 17:06:07, Keqian Zhu wrote: > >> From: jiangkunkun > >> > >> Block descriptor is not a proper granule for dirty log tracking. > >> Take an extreme example, if DMA writes one byte, under 1G

Re: [PATCH v2 04/11] iommu/arm-smmu-v3: Split block descriptor when start dirty log

Hi Yi, On 2021/3/16 17:17, Yi Sun wrote: > On 21-03-10 17:06:07, Keqian Zhu wrote: >> From: jiangkunkun >> >> Block descriptor is not a proper granule for dirty log tracking. >> Take an extreme example, if DMA writes one byte, under 1G mapping, >> the dirty amount reported to userspace is 1G,

Re: [PATCH v2 04/11] iommu/arm-smmu-v3: Split block descriptor when start dirty log

On 21-03-10 17:06:07, Keqian Zhu wrote: > From: jiangkunkun > > Block descriptor is not a proper granule for dirty log tracking. > Take an extreme example, if DMA writes one byte, under 1G mapping, > the dirty amount reported to userspace is 1G, but under 4K mapping, > the dirty amount is just

[PATCH v2 04/11] iommu/arm-smmu-v3: Split block descriptor when start dirty log

From: jiangkunkun Block descriptor is not a proper granule for dirty log tracking. Take an extreme example, if DMA writes one byte, under 1G mapping, the dirty amount reported to userspace is 1G, but under 4K mapping, the dirty amount is just 4K. This adds a new interface named start_dirty_log