Re: A problem of Intel IOMMU hardware ?

From: Lu Baolu
Date: Wed Mar 17 2021 - 23:08:34 EST

Hi Alex,

On 3/17/21 11:18 PM, Alex Williamson wrote:
{MAP, 0x0, 0xc0000000}, --------------------------------- (b)
use GDB to pause at here, and then DMA read IOVA=0,
IOVA 0 seems to be a special one. Have you verified with other addresses
than IOVA 0?
It is??? That would be a problem.

No problem from hardware point of view as far as I can see. Just
thought about software might handle it specially.

Best regards,