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, kevin.t...@intel.com 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

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, kevin.t...@intel.com 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

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, kevin.t...@intel.com 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

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 a

[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