Re: [Xen-devel] [PATCH] Don't clear HCR_VM bit when updating VTTBR.

2016-11-01 Thread Stefano Stabellini
On Tue, 1 Nov 2016, Julien Grall wrote: > Hi Stefano, > > On 31/10/2016 22:18, Stefano Stabellini wrote: > > On Mon, 31 Oct 2016, Steve Capper wrote: > > > On Wed, Oct 19, 2016 at 12:59:45PM -0700, Stefano Stabellini wrote: > > > > On Mon, 10 Oct 2016, Jun Sun wrote: > > > > > Currently function p

Re: [Xen-devel] [PATCH] Don't clear HCR_VM bit when updating VTTBR.

2016-11-01 Thread Julien Grall
Hi Stefano, On 31/10/2016 22:18, Stefano Stabellini wrote: On Mon, 31 Oct 2016, Steve Capper wrote: On Wed, Oct 19, 2016 at 12:59:45PM -0700, Stefano Stabellini wrote: On Mon, 10 Oct 2016, Jun Sun wrote: Currently function p2m_restore_state() would clear HCR_VM bit, i.e., disabling stage2 tra

Re: [Xen-devel] [PATCH] Don't clear HCR_VM bit when updating VTTBR.

2016-10-31 Thread Stefano Stabellini
On Mon, 31 Oct 2016, Steve Capper wrote: > On Wed, Oct 19, 2016 at 12:59:45PM -0700, Stefano Stabellini wrote: > > On Mon, 10 Oct 2016, Jun Sun wrote: > > > Currently function p2m_restore_state() would clear HCR_VM bit, i.e., > > > disabling stage2 translation, before updating VTTBR register. After

Re: [Xen-devel] [PATCH] Don't clear HCR_VM bit when updating VTTBR.

2016-10-31 Thread Steve Capper
On Wed, Oct 19, 2016 at 12:59:45PM -0700, Stefano Stabellini wrote: > On Mon, 10 Oct 2016, Jun Sun wrote: > > Currently function p2m_restore_state() would clear HCR_VM bit, i.e., > > disabling stage2 translation, before updating VTTBR register. After > > some research and talking to ARM support, I

Re: [Xen-devel] [PATCH] Don't clear HCR_VM bit when updating VTTBR.

2016-10-19 Thread Stefano Stabellini
On Mon, 10 Oct 2016, Jun Sun wrote: > Currently function p2m_restore_state() would clear HCR_VM bit, i.e., > disabling stage2 translation, before updating VTTBR register. After > some research and talking to ARM support, I got confirmed that this is not > necessary. We are currently working on a ne

Re: [Xen-devel] [PATCH] Don't clear HCR_VM bit when updating VTTBR.

2016-10-11 Thread Jun Sun
Sorry to be pushy - any feedback on this simple little patch? Cheers. Jun On Mon, Oct 10, 2016 at 12:27 PM, Jun Sun wrote: > Currently function p2m_restore_state() would clear HCR_VM bit, i.e., > disabling stage2 translation, before updating VTTBR register. After > some research and talking to

[Xen-devel] [PATCH] Don't clear HCR_VM bit when updating VTTBR.

2016-10-10 Thread Jun Sun
Currently function p2m_restore_state() would clear HCR_VM bit, i.e., disabling stage2 translation, before updating VTTBR register. After some research and talking to ARM support, I got confirmed that this is not necessary. We are currently working on a new platform that would need this to be remove