Re: [Xen-devel] [PATCH 00/10] x86/hvm: pkeys, add memory protection-key support

<kevin.t...@intel.com>; wei.l...@citrix.com; >> >> ian.campb...@citrix.com; stefano.stabell...@eu.citrix.com; >> >> george.dun...@eu.citrix.com; ian.jack...@eu.citrix.com; xen- >> >> de...@lists.xen.org; Nakajima, Jun <jun.nakaj...@intel.com>; Han,

Re: [Xen-devel] [PATCH 00/10] x86/hvm: pkeys, add memory protection-key support

n...@eu.citrix.com; > ian.jack...@eu.citrix.com; stefano.stabell...@eu.citrix.com; Han, Huaitong > <huaitong@intel.com>; Nakajima, Jun <jun.nakaj...@intel.com>; Tian, > Kevin <kevin.t...@intel.com>; xen-devel@lists.xen.org; k...@xen.org > Subject: RE: [Xen-devel] [PATC

Re: [Xen-devel] [PATCH 00/10] x86/hvm: pkeys, add memory protection-key support

gt;; Han, >> Huaitong <huaitong....@intel.com>; k...@xen.org >> Subject: Re: [Xen-devel] [PATCH 00/10] x86/hvm: pkeys, add memory >> protection-key support >> >>>>> On 16.11.15 at 18:45, <andrew.coop...@citrix.com> wrote: >>> Furthermore, it

Re: [Xen-devel] [PATCH 00/10] x86/hvm: pkeys, add memory protection-key support

l.com>; wei.l...@citrix.com; > ian.campb...@citrix.com; stefano.stabell...@eu.citrix.com; > george.dun...@eu.citrix.com; ian.jack...@eu.citrix.com; xen- > de...@lists.xen.org; Nakajima, Jun <jun.nakaj...@intel.com>; Han, > Huaitong <huaitong@intel.com>; k...@xen.org > S

Re: [Xen-devel] [PATCH 00/10] x86/hvm: pkeys, add memory protection-key support

ix.com; > ian.campb...@citrix.com; stefano.stabell...@eu.citrix.com; > george.dun...@eu.citrix.com; ian.jack...@eu.citrix.com; xen- > de...@lists.xen.org; Nakajima, Jun <jun.nakaj...@intel.com>; Han, > Huaitong <huaitong....@intel.com>; k...@xen.org > Subject: Re: [Xen-devel] [PATC

Re: [Xen-devel] [PATCH 00/10] x86/hvm: pkeys, add memory protection-key support

>>> On 17.11.15 at 17:24, wrote: > On 17/11/15 10:26, Jan Beulich wrote: > On 16.11.15 at 18:45, wrote: >>> Furthermore, it is unclear (given the unwritten ABI) whether it is even >>> safe to move _PAGE_GNTTAB out of the way, as this is

Re: [Xen-devel] [PATCH 00/10] x86/hvm: pkeys, add memory protection-key support

On 17/11/15 10:26, Jan Beulich wrote: On 16.11.15 at 18:45, wrote: >> Furthermore, it is unclear (given the unwritten ABI) whether it is even >> safe to move _PAGE_GNTTAB out of the way, as this is visible to a PV guest. > It seems pretty clear to me that this

Re: [Xen-devel] [PATCH 00/10] x86/hvm: pkeys, add memory protection-key support

>>> On 16.11.15 at 18:45, wrote: > Furthermore, it is unclear (given the unwritten ABI) whether it is even > safe to move _PAGE_GNTTAB out of the way, as this is visible to a PV guest. It seems pretty clear to me that this would be unsafe: It being part of

[Xen-devel] [PATCH 00/10] x86/hvm: pkeys, add memory protection-key support

The protection-key feature provides an additional mechanism by which IA-32e paging controls access to usermode addresses. Hardware support for protection keys for user pages is enumerated with CPUID feature flag CPUID.7.0.ECX[3]:PKU. Software support is CPUID.7.0.ECX[4]:OSPKE with the setting of