30 Jul
2019
30 Jul
'19
6:38 a.m.
On Mon, Jul 29, 2019 at 05:25:35PM +0530, Sreekanth Reddy wrote:
I agree with your above statement. But it is also possible that 0xFFFFFFFF-FFFFFFFF falls under the DMA able range, e.g. SGE's start address is 0xFFFFFFFF-FFFF000 and data length is 0x1000 bytes. So when HBA tries to DMA the data at 0xFFFFFFFF-FFFFFFFF location then it will faults the firmware due to it's hardware design.
We have observed above example's SGE address and length on AMD systems with SME & IOMMU enabled.
Ok. Please slightly update the changelog to say dma ranges instead of a dma address, as that implicies the addr field in the sg to me.
Otherwise looks ok:
Reviewed-by: Christoph Hellwig hch@lst.de