[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] [PATCH v5 0/4] x86: modify_ldt improvement, test, and config option

On 07/30/2015 12:12 PM, Andrew Cooper wrote:
On 30/07/15 17:05, Borislav Petkov wrote:
On Thu, Jul 30, 2015 at 11:53:34AM -0400, Boris Ostrovsky wrote:
As far as Xen guests are concerned,

Tested-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Does that mean, this patch 1/4 fixes the 32bit issue you guys are still
debugging on the v4 thread? Or does that need more fixing?

I was going to say... This v5 pre-dates figuring out what was wrong with
32bit Xen.  v5 1/4 is still susceptible.

Boris: does your Tested-by cover v5 + proposed fix?

Only V5, no extra changes.

And perhaps dropping aliases in xen_alloc_ldt() may be sufficient since with that done we will only have one mapping so a subsequent fault will have "correct" cr2 provided by the hypervisor (from your earlier email it sounded that hypervisor may have been providing incorrect cr2 if alias exists)


Xen-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.