Re: [Xen-devel] [PATCH v2 00/12] Alternate p2m: support multiple copies of host p2m

2015-06-25 Thread Ed White
On 06/25/2015 10:29 AM, Lengyel, Tamas wrote: >> >> I plan to fix the bug, such that unshare will always occur before a copy. >> I don't plan to make the altp2m's able to have shared pages. >> >> Ed >> > > For now that is of course fine, memsharing is experimental and that's what > I meant above.

Re: [Xen-devel] [PATCH v2 00/12] Alternate p2m: support multiple copies of host p2m

2015-06-25 Thread Lengyel, Tamas
On Thu, Jun 25, 2015 at 12:38 PM, Ed White wrote: > On 06/25/2015 02:00 AM, Andrew Cooper wrote: > > On 24/06/15 23:55, Ed White wrote: > >> On 06/24/2015 03:45 PM, Lengyel, Tamas wrote: > >>> On Wed, Jun 24, 2015 at 6:02 PM, Ed White > wrote: > >>> > On 06/24/2015 02:34 PM, Lengyel, Tamas

Re: [Xen-devel] [PATCH v2 00/12] Alternate p2m: support multiple copies of host p2m

2015-06-25 Thread Ed White
On 06/25/2015 02:00 AM, Andrew Cooper wrote: > On 24/06/15 23:55, Ed White wrote: >> On 06/24/2015 03:45 PM, Lengyel, Tamas wrote: >>> On Wed, Jun 24, 2015 at 6:02 PM, Ed White wrote: >>> On 06/24/2015 02:34 PM, Lengyel, Tamas wrote: > Hi Ed, > I tried the system using memsharing and

Re: [Xen-devel] [PATCH v2 00/12] Alternate p2m: support multiple copies of host p2m

2015-06-25 Thread Andrew Cooper
On 24/06/15 23:55, Ed White wrote: > On 06/24/2015 03:45 PM, Lengyel, Tamas wrote: >> On Wed, Jun 24, 2015 at 6:02 PM, Ed White wrote: >> >>> On 06/24/2015 02:34 PM, Lengyel, Tamas wrote: Hi Ed, I tried the system using memsharing and I collected the following crash log. In this tes

Re: [Xen-devel] [PATCH v2 00/12] Alternate p2m: support multiple copies of host p2m

2015-06-24 Thread Ed White
On 06/24/2015 03:45 PM, Lengyel, Tamas wrote: > On Wed, Jun 24, 2015 at 6:02 PM, Ed White wrote: > >> On 06/24/2015 02:34 PM, Lengyel, Tamas wrote: >>> Hi Ed, >>> I tried the system using memsharing and I collected the following crash >>> log. In this test I ran memsharing on all pages of the dom

Re: [Xen-devel] [PATCH v2 00/12] Alternate p2m: support multiple copies of host p2m

2015-06-24 Thread Lengyel, Tamas
On Wed, Jun 24, 2015 at 6:02 PM, Ed White wrote: > On 06/24/2015 02:34 PM, Lengyel, Tamas wrote: > > Hi Ed, > > I tried the system using memsharing and I collected the following crash > > log. In this test I ran memsharing on all pages of the domain before > > activating altp2m and creating the v

Re: [Xen-devel] [PATCH v2 00/12] Alternate p2m: support multiple copies of host p2m

2015-06-24 Thread Ed White
On 06/24/2015 02:34 PM, Lengyel, Tamas wrote: > Hi Ed, > I tried the system using memsharing and I collected the following crash > log. In this test I ran memsharing on all pages of the domain before > activating altp2m and creating the view. Afterwards I used my updated > xen-access to create a co

Re: [Xen-devel] [PATCH v2 00/12] Alternate p2m: support multiple copies of host p2m

2015-06-24 Thread Lengyel, Tamas
On Wed, Jun 24, 2015 at 12:43 PM, Ed White wrote: > On 06/24/2015 06:37 AM, Razvan Cojocaru wrote: > > On 06/24/2015 04:32 PM, Lengyel, Tamas wrote: > >> > >> > >> On Wed, Jun 24, 2015 at 1:39 AM, Razvan Cojocaru > >> mailto:rcojoc...@bitdefender.com>> wrote: > >> > >> On 06/24/2015 12:27 AM,

Re: [Xen-devel] [PATCH v2 00/12] Alternate p2m: support multiple copies of host p2m

2015-06-24 Thread Ed White
On 06/24/2015 06:37 AM, Razvan Cojocaru wrote: > On 06/24/2015 04:32 PM, Lengyel, Tamas wrote: >> >> >> On Wed, Jun 24, 2015 at 1:39 AM, Razvan Cojocaru >> mailto:rcojoc...@bitdefender.com>> wrote: >> >> On 06/24/2015 12:27 AM, Lengyel, Tamas wrote: >> > I've extended xen-access to exercise

Re: [Xen-devel] [PATCH v2 00/12] Alternate p2m: support multiple copies of host p2m

2015-06-24 Thread Andrew Cooper
On 22/06/15 19:56, Ed White wrote: > This set of patches adds support to hvm domains for EPTP switching by creating > multiple copies of the host p2m (currently limited to 10 copies). > > The primary use of this capability is expected to be in scenarios where access > to memory needs to be monitore

Re: [Xen-devel] [PATCH v2 00/12] Alternate p2m: support multiple copies of host p2m

2015-06-24 Thread Razvan Cojocaru
On 06/24/2015 04:32 PM, Lengyel, Tamas wrote: > > > On Wed, Jun 24, 2015 at 1:39 AM, Razvan Cojocaru > mailto:rcojoc...@bitdefender.com>> wrote: > > On 06/24/2015 12:27 AM, Lengyel, Tamas wrote: > > I've extended xen-access to exercise this new feature taking into > > account some of

Re: [Xen-devel] [PATCH v2 00/12] Alternate p2m: support multiple copies of host p2m

2015-06-24 Thread Lengyel, Tamas
On Wed, Jun 24, 2015 at 1:39 AM, Razvan Cojocaru wrote: > On 06/24/2015 12:27 AM, Lengyel, Tamas wrote: > > I've extended xen-access to exercise this new feature taking into > > account some of the current limitations. Using the altp2m_write|exec > > options we create a duplicate view of the defa

Re: [Xen-devel] [PATCH v2 00/12] Alternate p2m: support multiple copies of host p2m

2015-06-23 Thread Razvan Cojocaru
On 06/24/2015 12:27 AM, Lengyel, Tamas wrote: > I've extended xen-access to exercise this new feature taking into > account some of the current limitations. Using the altp2m_write|exec > options we create a duplicate view of the default hostp2m, and instead > of relaxing the mem_access permissions

Re: [Xen-devel] [PATCH v2 00/12] Alternate p2m: support multiple copies of host p2m

2015-06-23 Thread Ed White
On 06/23/2015 02:27 PM, Lengyel, Tamas wrote: >> Testability is still a potential issue. We have offered to make our >> internal >> Windows test binaries available for intra-domain testing. Tamas has >> been working on toolstack support for cross-domain testing with a slightly >> earlier patch seri

Re: [Xen-devel] [PATCH v2 00/12] Alternate p2m: support multiple copies of host p2m

2015-06-23 Thread Lengyel, Tamas
> Testability is still a potential issue. We have offered to make our > internal > Windows test binaries available for intra-domain testing. Tamas has > been working on toolstack support for cross-domain testing with a slightly > earlier patch series, and we hope he will submit that support. > Hi

[Xen-devel] [PATCH v2 00/12] Alternate p2m: support multiple copies of host p2m

2015-06-22 Thread Ed White
This set of patches adds support to hvm domains for EPTP switching by creating multiple copies of the host p2m (currently limited to 10 copies). The primary use of this capability is expected to be in scenarios where access to memory needs to be monitored and/or restricted below the level at which