Re: [Xen-devel] RIP MTRR - status update for upcoming v4.2

2015-08-07 Thread Toshi Kani
On Fri, 2015-08-07 at 13:25 -0700, Luis R. Rodriguez wrote: On Thu, Aug 6, 2015 at 3:58 PM, Toshi Kani toshi.k...@hp.com wrote: On Thu, 2015-08-06 at 12:53 -0700, Luis R. Rodriguez wrote: On Fri, Jun 12, 2015 at 9:58 AM, Toshi Kani toshi.k...@hp.com wrote: On Fri, 2015-06-12 at 08:59

Re: [Xen-devel] RIP MTRR - status update for upcoming v4.2

2015-08-07 Thread Luis R. Rodriguez
On Thu, Aug 6, 2015 at 3:58 PM, Toshi Kani toshi.k...@hp.com wrote: On Thu, 2015-08-06 at 12:53 -0700, Luis R. Rodriguez wrote: On Fri, Jun 12, 2015 at 9:58 AM, Toshi Kani toshi.k...@hp.com wrote: On Fri, 2015-06-12 at 08:59 +0100, Jan Beulich wrote: On 12.06.15 at 01:23,

Re: [Xen-devel] RIP MTRR - status update for upcoming v4.2

2015-08-07 Thread Toshi Kani
On Fri, 2015-08-07 at 15:23 -0700, Luis R. Rodriguez wrote: On Fri, Aug 7, 2015 at 2:56 PM, Toshi Kani toshi.k...@hp.com wrote: On Fri, 2015-08-07 at 13:25 -0700, Luis R. Rodriguez wrote: On Thu, Aug 6, 2015 at 3:58 PM, Toshi Kani toshi.k...@hp.com wrote: On Thu, 2015-08-06 at 12:53

Re: [Xen-devel] RIP MTRR - status update for upcoming v4.2

2015-08-07 Thread Toshi Kani
On Fri, 2015-08-07 at 17:08 -0600, Toshi Kani wrote: On Fri, 2015-08-07 at 15:23 -0700, Luis R. Rodriguez wrote: On Fri, Aug 7, 2015 at 2:56 PM, Toshi Kani toshi.k...@hp.com wrote: On Fri, 2015-08-07 at 13:25 -0700, Luis R. Rodriguez wrote: On Thu, Aug 6, 2015 at 3:58 PM, Toshi Kani

Re: [Xen-devel] RIP MTRR - status update for upcoming v4.2

2015-08-07 Thread Luis R. Rodriguez
On Fri, Aug 7, 2015 at 4:08 PM, Toshi Kani toshi.k...@hp.com wrote: On Fri, 2015-08-07 at 15:23 -0700, Luis R. Rodriguez wrote: On Fri, Aug 7, 2015 at 2:56 PM, Toshi Kani toshi.k...@hp.com wrote: On Fri, 2015-08-07 at 13:25 -0700, Luis R. Rodriguez wrote: On Thu, Aug 6, 2015 at 3:58 PM,

Re: [Xen-devel] RIP MTRR - status update for upcoming v4.2

2015-08-07 Thread Toshi Kani
On Fri, 2015-08-07 at 16:26 -0700, Luis R. Rodriguez wrote: On Fri, Aug 7, 2015 at 4:08 PM, Toshi Kani toshi.k...@hp.com wrote: On Fri, 2015-08-07 at 15:23 -0700, Luis R. Rodriguez wrote: On Fri, Aug 7, 2015 at 2:56 PM, Toshi Kani toshi.k...@hp.com wrote: On Fri, 2015-08-07 at 13:25

Re: [Xen-devel] RIP MTRR - status update for upcoming v4.2

2015-08-06 Thread Luis R. Rodriguez
On Thu, Aug 6, 2015 at 12:53 PM, Luis R. Rodriguez mcg...@do-not-panic.com wrote: For those type of OSes... could it be possible to negotiate or hint to the platform through an attribute somehow that the OS has such capability to not use MTRR? And if that's not possible how about a new

Re: [Xen-devel] RIP MTRR - status update for upcoming v4.2

2015-06-15 Thread Jan Beulich
On 13.06.15 at 01:15, l...@amacapital.net wrote: On Jun 12, 2015 12:59 AM, Jan Beulich jbeul...@suse.com wrote: On 12.06.15 at 01:23, toshi.k...@hp.com wrote: There are two usages on MTRRs: 1) MTRR entries set by firmware 2) MTRR entries set by OS drivers We can obsolete 2), but

Re: [Xen-devel] RIP MTRR - status update for upcoming v4.2

2015-06-13 Thread Ingo Molnar
* Andy Lutomirski l...@amacapital.net wrote: On Jun 12, 2015 12:59 AM, Jan Beulich jbeul...@suse.com wrote: On 12.06.15 at 01:23, toshi.k...@hp.com wrote: There are two usages on MTRRs: 1) MTRR entries set by firmware 2) MTRR entries set by OS drivers We can obsolete 2),

Re: [Xen-devel] RIP MTRR - status update for upcoming v4.2

2015-06-12 Thread Jan Beulich
On 12.06.15 at 01:23, toshi.k...@hp.com wrote: There are two usages on MTRRs: 1) MTRR entries set by firmware 2) MTRR entries set by OS drivers We can obsolete 2), but we have no control over 1). As UEFI firmwares also set this up, this usage will continue to stay. So, we should not

Re: [Xen-devel] RIP MTRR - status update for upcoming v4.2

2015-06-12 Thread Andy Lutomirski
On Jun 12, 2015 12:59 AM, Jan Beulich jbeul...@suse.com wrote: On 12.06.15 at 01:23, toshi.k...@hp.com wrote: There are two usages on MTRRs: 1) MTRR entries set by firmware 2) MTRR entries set by OS drivers We can obsolete 2), but we have no control over 1). As UEFI firmwares

Re: [Xen-devel] RIP MTRR - status update for upcoming v4.2

2015-06-12 Thread James Bottomley
On Fri, 2015-06-12 at 16:15 -0700, Andy Lutomirski wrote: On Jun 12, 2015 12:59 AM, Jan Beulich jbeul...@suse.com wrote: On 12.06.15 at 01:23, toshi.k...@hp.com wrote: There are two usages on MTRRs: 1) MTRR entries set by firmware 2) MTRR entries set by OS drivers We can

Re: [Xen-devel] RIP MTRR - status update for upcoming v4.2

2015-06-12 Thread Toshi Kani
On Fri, 2015-06-12 at 08:59 +0100, Jan Beulich wrote: On 12.06.15 at 01:23, toshi.k...@hp.com wrote: There are two usages on MTRRs: 1) MTRR entries set by firmware 2) MTRR entries set by OS drivers We can obsolete 2), but we have no control over 1). As UEFI firmwares also set

[Xen-devel] RIP MTRR - status update for upcoming v4.2

2015-06-11 Thread Luis R. Rodriguez
The series to bury direct MTRR use is almost all in and on its way to v4.2. As the pending series continue slowly to be merged I wanted to take the time to reiterate the justification for these changes in hopes it may help those still reviewing some of these patches which are pending and to help

Re: [Xen-devel] RIP MTRR - status update for upcoming v4.2

2015-06-11 Thread Toshi Kani
On Thu, 2015-06-11 at 13:36 -0700, Luis R. Rodriguez wrote: : Pending RIP MTRR patches There are a few pending series so I wanted to provide a status update on those series. mtrr: bury MTRR - unexport mtrr_add() and mtrr_del() This is the nail on the MTRR coffin,

Re: [Xen-devel] RIP MTRR - status update for upcoming v4.2

2015-06-11 Thread Luis R. Rodriguez
On Thu, Jun 11, 2015 at 05:23:16PM -0600, Toshi Kani wrote: On Thu, 2015-06-11 at 13:36 -0700, Luis R. Rodriguez wrote: : Pending RIP MTRR patches There are a few pending series so I wanted to provide a status update on those series. mtrr: bury MTRR -