Re: [PATCH v3 0/3] Off-load TLB invalidations to host for !GTSE

2020-07-18 Thread Michael Ellerman
Bharata B Rao writes: > On Fri, Jul 17, 2020 at 12:44:00PM +1000, Nicholas Piggin wrote: >> Excerpts from Nicholas Piggin's message of July 17, 2020 12:08 pm: >> > Excerpts from Qian Cai's message of July 17, 2020 3:27 am: >> >> On Fri, Jul 03, 2020 at 11:06:05AM +0530, Bharata B Rao wrote: >> >>>

Re: [PATCH v3 0/3] Off-load TLB invalidations to host for !GTSE

2020-07-16 Thread Bharata B Rao
On Fri, Jul 17, 2020 at 12:44:00PM +1000, Nicholas Piggin wrote: > Excerpts from Nicholas Piggin's message of July 17, 2020 12:08 pm: > > Excerpts from Qian Cai's message of July 17, 2020 3:27 am: > >> On Fri, Jul 03, 2020 at 11:06:05AM +0530, Bharata B Rao wrote: > >>> Hypervisor may choose not to

Re: [PATCH v3 0/3] Off-load TLB invalidations to host for !GTSE

2020-07-16 Thread Nicholas Piggin
Excerpts from Nicholas Piggin's message of July 17, 2020 12:08 pm: > Excerpts from Qian Cai's message of July 17, 2020 3:27 am: >> On Fri, Jul 03, 2020 at 11:06:05AM +0530, Bharata B Rao wrote: >>> Hypervisor may choose not to enable Guest Translation Shootdown Enable >>> (GTSE) option for the gues

Re: [PATCH v3 0/3] Off-load TLB invalidations to host for !GTSE

2020-07-16 Thread Nicholas Piggin
Excerpts from Qian Cai's message of July 17, 2020 3:27 am: > On Fri, Jul 03, 2020 at 11:06:05AM +0530, Bharata B Rao wrote: >> Hypervisor may choose not to enable Guest Translation Shootdown Enable >> (GTSE) option for the guest. When GTSE isn't ON, the guest OS isn't >> permitted to use instructio

Re: [PATCH v3 0/3] Off-load TLB invalidations to host for !GTSE

2020-07-16 Thread Stephen Rothwell
Hi all, On Thu, 16 Jul 2020 13:27:14 -0400 Qian Cai wrote: > > Reverting the whole series fixed random memory corruptions during boot on > POWER9 PowerNV systems below. I will revert those commits from linux-next today as well (they revert cleanly). -- Cheers, Stephen Rothwell pgpFh42TZjw5z.

Re: [PATCH v3 0/3] Off-load TLB invalidations to host for !GTSE

2020-07-16 Thread Qian Cai
On Fri, Jul 03, 2020 at 11:06:05AM +0530, Bharata B Rao wrote: > Hypervisor may choose not to enable Guest Translation Shootdown Enable > (GTSE) option for the guest. When GTSE isn't ON, the guest OS isn't > permitted to use instructions like tblie and tlbsync directly, but is > expected to make hy