From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ian Campbell Subject: Re: [PATCH v3] x86/p2m: use large pages for MMIO mappings Date: Fri, 15 Jan 2016 13:57:02 +0000 Message-ID: <1452866222.6020.8.camel@citrix.com> References: <569780BD02000078000C6A1E@prv-mh.provo.novell.com> <1452852565.32341.51.camel@citrix.com> <5698DC6502000078000C72F9@prv-mh.provo.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aK4sE-0003vU-6p for xen-devel@lists.xenproject.org; Fri, 15 Jan 2016 13:57:06 +0000 In-Reply-To: <5698DC6502000078000C72F9@prv-mh.provo.novell.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Jan Beulich Cc: Kevin Tian , Wei Liu , Stefano Stabellini , George Dunlap , Andrew Cooper , Ian Jackson , Tim Deegan , Jun Nakajima , xen-devel , Keir Fraser List-Id: xen-devel@lists.xenproject.org T24gRnJpLCAyMDE2LTAxLTE1IGF0IDAzOjQ3IC0wNzAwLCBKYW4gQmV1bGljaCB3cm90ZToKPiA+ ID4gPiBPbiAxNS4wMS4xNiBhdCAxMTowOSwgPGlhbi5jYW1wYmVsbEBjaXRyaXguY29tPiB3cm90 ZToKPiA+IE9uIFRodSwgMjAxNi0wMS0xNCBhdCAwMzowNCAtMDcwMCwgSmFuIEJldWxpY2ggd3Jv dGU6Cj4gPiA+IC0gQVJNIHNpZGUgdW5pbXBsZW1lbnRlZCAoYW5kIGhlbmNlIGxpYnhjIGZvciBu b3cgbWFkZSBjb3BlIHdpdGggYm90aAo+ID4gPiDCoCBtb2RlbHMpLAo+ID4gCj4gPiBTbywgb25l IG1vZGVsIGlzIHRoZSBvbmUgZGVzY3JpYmVkIGluIHRoZSBjb21taXQgbWVzc2FnZToKPiA+IAo+ ID4gPiAtIHplcm8gKHN1Y2Nlc3MsIGV2ZXJ5dGhpbmcgZG9uZSkKPiA+ID4gLSBwb3NpdGl2ZSAo c3VjY2VzcywgdGhpcyBtYW55IGRvbmUsIG1vcmUgdG8gZG86IHJlLWludm9rZSkKPiA+ID4gLSBu ZWdhdGl2ZSAoZXJyb3IpCj4gPiAKPiA+IFdoYXQgaXMgdGhlIG90aGVyIG9uZT8gSSdkIGV4cGVj dCBBUk0gdG8gYWxyZWFkeSBpbXBsZW1lbnQgYSBzdWJzZXQgb2YKPiA+IHRoaXMKPiA+IChpLmUu IDAgb3IgbmVnYXRpdmUsIHBlcmhhcHMgd2l0aCBhIHN1YnNldCBvZiB0aGUgcG9zc2libGUgZXJy bm8KPiA+IHZhbHVlcyksIAo+ID4gd2hpY2ggSSdkIHRoZW4gZXhwZWN0IGxpYnhjIHRvIGp1c3Qg Y29wZSB3aXRoIHdpdGhvdXQgaXQgY29uc3RpdHV0aW5nIGEKPiA+IHNlY29uZCBtb2RlbC4KPiAK PiBXZWxsLCBmaXJzdCBvZiBhbGwgQVJNIGRvZXNuJ3QgZ2V0IHN3aXRjaGVkIGF3YXkgZnJvbSB0 aGUgY3VycmVudAo+IG1vZGVsICh5ZXQpLCBpLmUuIHJldHVybmluZyAtRTJCSUcgb3V0IG9mIGRv X2RvbWN0bCgpLgoKV2hpY2ggQUZBSUNUIGlzIGEgdmFsaWQgYmVoYXZpb3VyIHVuZGVyIHRoZSBu ZXcgbW9kZWwgZGVzY3JpYmVkIGluIHRoZQpjb21taXQgbWVzc2FnZSBzcGVjaWZpY2FsbHkgdGhl ICJuZWdhdGl2ZSAoZXJyb3IpIiBjYXNlLgoKSSB0aGluayB0aGUgY29yZSBvZiBteSBvYmplY3Rp b24vY29uZnVzaW9uIGhlcmUgaXMgZGVzY3JpYmluZyB0aGlzIGFzIHR3bwpkaWZmZXJlbnQgbW9k ZWxzIHdoZW4gd2hhdCBpcyBiZWluZyBpbnRyb2R1Y2VkIGlzIGEgc2luZ2xlIEFQSSB3aGljaCBj YW4KZmFpbCBlaXRoZXIgcGFydGlhbGx5IG9yIGVudGlyZWx5LCB3aXRoIHRoYXQgYmVpbmcgYXQg dGhlIGRpc2NyZXRpb24gb2YgdGhlCmludGVybmFscy4gSW4gYW55IGNhc2UgbGlieGMgbmVlZHMg dG8gY29wZSB3aXRoIHRoZSBjb21wbGV0ZSBnYW11dCBvZgpiZWhhdmlvdXJzIG9mIHRoZSBpbnRl cmZhY2UuCgpJT1cgcmF0aGVyIHRoYW4gZGVzY3JpYmluZyBhIG5ldyBBUEkgYW5kIHJlZmVycmlu ZyBvYmxpcXVlbHkgdG8gQVJNIG9ubHkKc3VwcG9ydGluZyBhbiBvbGQgbW9kZWwgSSB0aGluayB0 aGlzIG5lZWRzIGEgY29tcGxldGUgZGVzY3JpcHRpb24gb2YgdGhlCmludGVyZmFjZSBjb3Zlcmlu ZyB0aGUgZnVsbCBwb3NzaWJpbGl0aWVzIG9mIHRoZSBBUEkuCgo+ICBBbmQgdGhlbgo+IHRoZSBk aWZmZXJlbmNlIGJldHdlZW4gd2hhdCB0aGUgcGF0Y2ggaW1wbGVtZW50cyBhbmQgd2hhdCB0aGUK PiBub24tY29tbWl0IG1lc3NhZ2UgY29tbWVudCBkZXNjcmliZXMgaXMgaG93IGVycm9ycyBnZXQg aGFuZGxlZDoKPiBUaGUgcGF0Y2ggbWFrZXMgYSBuZWdhdGl2ZSBlcnJvciB2YWx1ZSByZXR1cm5l ZCB1cG9uIGVycm9yLCB3aXRoCj4gdGhlIGNhbGxlciBoYXZpbmcgbm8gd2F5IHRvIHRlbGwgYXQg d2hhdCBwb2ludCB0aGUgZXJyb3Igb2NjdXJyZWQKPiAoYW5kIHdpdGggYSBiZXN0IGVmZm9ydCB1 bmRvIGluIHRoZSBjYXNlIG9mICJtYXAiKS4gVGhlIGRlc2NyaWJlZAo+IGFsdGVybmF0aXZlIHdv dWxkIHJldHVybiB0aGUgbnVtYmVyIG9mIHN1Y2NlZWRlZCBlbnRyaWVzIHVubGVzcwo+IGFuIGVy cm9yIG9jY3VycmVkIG9uIHRoZSB2ZXJ5IGZpcnN0IE1GTiwgd2l0aG91dCBhbnkgYXR0ZW1wdCB0 bwo+IHVuZG8gdGhlIHBhcnQgdGhhdCB3YXMgZG9uZSBzdWNjZXNzZnVsbHkuIEkuZS4gaXQgd291 bGQgbGVhdmUgaXQKPiB0byB0aGUgY2FsbGVyIHRvIGRlY2lkZSB3aGF0IHRvIGRvLCBhbmQgd2hl dGhlci93aGVuIHRvIHJvbGwgYmFjay4KClRoYXQncyAocHJvYmFibHksIEkgZG9uJ3QgcXVpdGUg Zm9sbG93IGFsbCB0aGUgZGV0YWlscyBhcyB3cml0dGVuKSBmaW5lLApidXQgdGhlIGludGVyZmFj ZSBzaG91bGQgYmUgZGVzY3JpYmVkIGFzIGEgc2luZ2xlIEFQSSB3aXRoIHRoZSBwb3NzaWJsZQpm YWlsdXJlIGNhc2VzIGVhY2ggc3BlbGxlZCBvdXQsIGkuZS4gbm90IGRlc2NyaWJlZCBhcyBhIHNw bGl0L2NvbnRyYXN0CmJldHdlZW4gb2xkIHZzLiBuZXcgb3IgeDg2IHZzLiBhcm0gYmVoYXZpb3Vy LiBUaGUgZmFjdCB0aGF0IHg4NiBhbmQgYXJtCm1pZ2h0IGN1cnJlbnRseSBleGhpYml0IGRpZmZl cmVudCBzdWJzZXRzIG9mIHRoZSBwb3NzaWJpbGl0aWVzIG9mZmVyZWQgYnkKdGhlIEFQSSBpcyBv ZiBhdCBiZXN0IHNlY29uZGFyeSBpbnRlcmVzdC4KCklhbi4KCl9fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRl dmVsQGxpc3RzLnhlbi5vcmcKaHR0cDovL2xpc3RzLnhlbi5vcmcveGVuLWRldmVsCg==