Re: [Xen-devel] [PATCH] VT-d: don't crash when PTE bits 52 and up are non-zero

2015-01-07 Thread Tian, Kevin
> From: Jan Beulich [mailto:jbeul...@suse.com] > Sent: Wednesday, January 07, 2015 6:16 PM > > >>> On 23.12.14 at 07:52, wrote: > >> From: Jan Beulich [mailto:jbeul...@suse.com] > >> Sent: Friday, December 19, 2014 7:26 PM > >> > >> This can (and will) be legitimately the case when sharing page

Re: [Xen-devel] [PATCH] VT-d: don't crash when PTE bits 52 and up are non-zero

2015-01-07 Thread Konrad Rzeszutek Wilk
On Wed, Jan 07, 2015 at 10:15:39AM +, Jan Beulich wrote: > >>> On 23.12.14 at 07:52, wrote: > >> From: Jan Beulich [mailto:jbeul...@suse.com] > >> Sent: Friday, December 19, 2014 7:26 PM > >> > >> This can (and will) be legitimately the case when sharing page tables > >> with EPT (more of a

Re: [Xen-devel] [PATCH] VT-d: don't crash when PTE bits 52 and up are non-zero

2015-01-07 Thread Jan Beulich
>>> On 23.12.14 at 07:52, wrote: >> From: Jan Beulich [mailto:jbeul...@suse.com] >> Sent: Friday, December 19, 2014 7:26 PM >> >> This can (and will) be legitimately the case when sharing page tables >> with EPT (more of a problem before p2m_access_rwx became zero, but >> still possible even now

Re: [Xen-devel] [PATCH] VT-d: don't crash when PTE bits 52 and up are non-zero

2014-12-23 Thread Jan Beulich
>>> On 23.12.14 at 07:52, wrote: >> From: Jan Beulich [mailto:jbeul...@suse.com] >> Sent: Friday, December 19, 2014 7:26 PM >> >> This can (and will) be legitimately the case when sharing page tables >> with EPT (more of a problem before p2m_access_rwx became zero, but >> still possible even now

Re: [Xen-devel] [PATCH] VT-d: don't crash when PTE bits 52 and up are non-zero

2014-12-22 Thread Tian, Kevin
> From: Jan Beulich [mailto:jbeul...@suse.com] > Sent: Friday, December 19, 2014 7:26 PM > > This can (and will) be legitimately the case when sharing page tables > with EPT (more of a problem before p2m_access_rwx became zero, but > still possible even now when other than that is the default for

[Xen-devel] [PATCH] VT-d: don't crash when PTE bits 52 and up are non-zero

2014-12-19 Thread Jan Beulich
This can (and will) be legitimately the case when sharing page tables with EPT (more of a problem before p2m_access_rwx became zero, but still possible even now when other than that is the default for a guest), leading to an unconditional crash (in print_vtd_entries()) when a DMA remapping fault oc