> -----Original Message----- > From: Yigit, Ferruh > Sent: Wednesday, November 1, 2017 9:07 AM > To: Thomas Monjalon; Richardson, Bruce; Gonzalez Monroy, Sergio > Cc: [email protected]; Yigit, Ferruh; Tan, Jianfeng; Santosh Shukla > Subject: [PATCH] eal: disable IOVA mode detection by default > > Fix kernel crash with KNI because KNI requires physical addresses. > > A config option introduced to disable IOVA mode detection and to set it > to physical address by default. Disabling config option will enable IOVA > mode detection. > > When there is no intension to use KNI, it is safe to enable detection. > > Config option disable IOVA mode detection by default to be sure only who > is aware of result enable it. > > Fixes: 72d013644bd6 ("mem: honor IOVA mode in malloc virt2phy") > > Signed-off-by: Ferruh Yigit <[email protected]> > --- > Cc: Jianfeng Tan <[email protected]> > Cc: Santosh Shukla <[email protected]> > Cc: Thomas Monjalon <[email protected]>
Refer to how vhost-kernel works, we may leverage a memory region table to do the translation. The bad side is it's less efficient than current phys_to_virt. Another side, we did not check the result of phys_to_virt, that's why kernel crashes. Thanks, Jianfeng
