From mboxrd@z Thu Jan 1 00:00:00 1970 From: Don Dutile Subject: Re: [PATCH 2/2] iommu: dmar -- reserve mmio space used by IOMMU Date: Mon, 04 Jun 2012 19:52:59 -0400 Message-ID: <4FCD4A5B.2050604@redhat.com> References: <1338845342-12464-1-git-send-email-ddutile@redhat.com> <1338845342-12464-3-git-send-email-ddutile@redhat.com> <1338849430.10884.288.camel@shinybook.infradead.org> <4FCD401D.9000304@redhat.com> <1338852196.26785.10.camel@shinybook.infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; Format="flowed" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <1338852196.26785.10.camel-Fexsq3y4057IgHVZqg5X0TlWvGAXklZc@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: David Woodhouse Cc: chrisw-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, suresh.b.siddha-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, mingo-X9Un+BFzKDI@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: iommu@lists.linux-foundation.org T24gMDYvMDQvMjAxMiAwNzoyMyBQTSwgRGF2aWQgV29vZGhvdXNlIHdyb3RlOgo+IE9uIE1vbiwg MjAxMi0wNi0wNCBhdCAxOTowOSAtMDQwMCwgRG9uIER1dGlsZSB3cm90ZToKPj4+IElmIHRoZSBC SU9TICpkb2Vzbid0KiBkbyB0aGF0LCB0aGVuIEkgYmVsaWV2ZSB0aGlzIHNob3VsZCBiZQo+Pj4g V0FSTl9UQUlOVF9PTkNFKOKAplRBSU5UX0ZJUk1XQVJFX1dPUktBUk9VTkTigKYpIGxpa2Ugb3Ro ZXIgQklPUyBwcm9ibGVtcwo+Pj4gdGhhdCB3ZSBoYXZlIGRpc2NvdmVyZWQuCj4+Pgo+PiB3ZWxs LCBvbmUgY291bGQgYXJndWUgaXQgbWF5IGJlIGVhc2llciB0byBjbGFpbSB0aGUgc3BhY2UgcmVz ZXJ2ZWQgaW4KPj4gdGhlIE9TIHRoZW4gbWFraW5nIHlldCBhbm90aGVyIGhvbGUgaW4gdGhlIGF2 YWlsYWJsZSBJTyBhZGRyZXNzIHNwYWNlCj4+IGluIHRoZSBBQ1BJIHRhYmxlcy4KPgo+IEJ1dCBo b3c/IEl0J3MgZ290IHRvIHdvcmsgd2l0aCBvcGVyYXRpbmcgc3lzdGVtcyB0aGF0IHByZWRhdGUg dGhlIElPTU1VLgo+IFRoZSByZWdpc3RlcnMgKmhhdmUqIHRvIGJlIGluIGEgbWFya2VkIGhvbGUu IElmICpub3QqLCB0aGVuIHdlIHNob3VsZAo+IGdpdmUgYSBjbGVhciAiWU9VUiBCSU9TIElTIEJS T0tFTiIgb3V0cHV0IGxpa2UgYWxsIHRoZSBzaW1pbGFyCj4gYnJlYWthZ2VzLCBhbmQgZG8gb3Vy IGJlc3QgdG8gd29yayBhcm91bmQgaXQuCj4KPiBXb3JraW5nIGFyb3VuZCBpdCBpcyBmaW5lOyBJ J20gbm90IHN1Z2dlc3RpbmcgdGhhdCB3ZSBzaG91bGQgV0FSTigpCj4gKmluc3RlYWQqIG9mIHdv cmtpbmcgYXJvdW5kIGl0Lgo+Cm9rLgoKPj4gSG93IGRvZXMgdGhlIGtlcm5lbCBwcm9iZSBmb3Ig Y2hpcHNldHMsIHRoZW4gcmVnaXN0ZXJzIHdpdGggdGhlIGNoaXBzZXRzCj4+IHRvIGZpbmQgdGhl IHByb2dyYW1tZWQgSU9NTVUgQkFSIHZhbHVlcz8KPj4gLS0gSSBtaXNzZWQgdGhhdCBjbGFzcy4u Li4gSSBvbmx5IGhhdmUgSW50ZWwgVmlydCBUZWNoIERpcmVjdGVkIEkvTwo+PiBBcmNoaXRlY3R1 cmUgc3BlYy4sIGFuZCB0aGUgYmVnaW5uaW5nIG9mIElPTU1VIGlzIGJhc2VkIG9uIERNQVIgdGFi bGVzLi4uCj4+IElmIHlvdSBoYXZlIG1vcmUgaW5mby9ndWlkYW5jZSwgSSdkIGFwcHJlY2lhdGUg aXQuCj4KPiBIbSwgSSB0aG91Z2h0IHdlJ2QgYWxyZWFkeSBzdGFydGVkIGRvaW5nIHNvbWUgb2Yg dGhhdCBpbiBvcmRlciB0bwo+IHNhbml0eS1jaGVjayB0aGUgRE1BUiB0YWJsZXMuIFRoZSBWVEJB UiByZWdpc3RlcnMgYXJlIGluIFBDSSBjb25maWcKPiBzcGFjZS4gVGhlIHF1aXJrX2lvYXRfc25i X2xvY2FsX2lvbW11KCkgY2hlY2sgaXMgYWxyZWFkeSBsb29raW5nIGF0Cj4gdGhlbS4uLgo+CmV4 Y2VwdCB0aGF0IHF1aXJrIGlzIGNvbmRpdGlvbmFsbHkgY29tcGlsZWQgaW4gaW50ZWwtaW9tbXUu YzsKdG8gZG8gdGhlIGNoZWNrIGluZGVwIG9mIElOVEVMLUlPTU1VIENPTkZJRyB0YWcsIGl0J2Qg aGF2ZSB0byBtb3ZlIGludG8KcGNpL3F1aXJrcy5jLiAuLi4gYW5kIGhvdyBkb2VzIGl0IGdldCB0 cmlnZ2VyZWQ/IC4uLiBhIGRtYXIgdGFibGUgY2hlY2s/Cih0eXBpY2FsIHF1aXJrcyBraWNrZWQg YmFzZWQgb24gdmlkL2RpZC4uLikKCj4gSSdtIG5vdCBxdWl0ZSBzdXJlIHdoaWNoIGRvY3VtZW50 IHRoZXkgYXJlIGRvY3VtZW50ZWQgaW4uIERvaW5nIGl0IGJhc2VkCj4gb24gdGhlIERNQVIgdGFi bGUsIGFzIHlvdSBoYXZlLCBpcyBjZXJ0YWlubHkgYSBnb29kIHN0YXJ0LiBCdXQgZG8gaXQKPiB3 aXRoIGEgYmlnZ2VyIHNob3V0eSBXQVJOKFRBSU5UX0ZJUk1XQVJFX1dPUktBUk9VTkQpLCBhbmQg ZG8gaXQgd2hlbiB0aGUKPiBJT01NVSBjb2RlIGlzbid0IGNvbXBpbGVkIGluLgo+ClRoZSAnZG8g aXQgZm9yIGludGVsLWlvbW11IHN5c3RlbXMgb25seScgYW5kIG5vdCBiZSBDT05GSUcgZGVwZW5k ZW50CmlzIGEgYml0IGNoYWxsZW5naW5nIGdpdmVuIGhvdyB0aGUgY29kZSBpcyBjb21waWxlZCwg YW5kIHRoZSBleHBlY3RlZC9ub3JtYWwKY29kZSBmbG93IHN0YXJ0aW5nIGZyb20gYSBkbWFyIHRh YmxlLgpvZiBjb3Vyc2UsIGlmIHRoZSBJT01NVSBqdXN0IGV4cG9zZWQgaXRzZWxmIGFzIHRoZSBm aXJzdCBkZXZpY2Ugb24gYSBQQ0kKYnVzLCB0aGlzIHdvdWxkIGJlIHRyaXZpYWwhCi0tIEkgcmVh bGx5IGhhdGUgQklPUyBkZXBlbmRlbmNpZXMgdG8gZ2V0IHRoaW5ncyByaWdodCEKCj4+IFNlZW1z IGxpa2UgdGhlIHBhdGNoIHdvdWxkIGJlIGVhc2llciB0byBzdXBwb3J0LCBhbHRob3VnaCBpdCBk b2Vzbid0Cj4+IHNvbHZlIHRoZSBwcm9ibGVtIHlvdSBtZW50aW9uZWQgYWJvdmUsIHVubGVzcyB0 aGUgcmVzZXJ2YXRpb24gY29kZSBpc24ndAo+PiBjb21waWxlZCBvdXQgYnkgSU5URUwtSU9NTVUg KGJ1dCBzb21ldGhpbmcgbW9yZSBnZW5lcmFsIGxpa2UgISh4ODYmJiAgUENJKSkuCj4+IHRoZSBm aXJtd2FyZSB0YWludCBtZXNzYWdlIHdvdWxkIGJlIGluZm9ybWF0aXZlIGFzIHRvIHRoZSBxdWFs aXR5IG9mCj4+IHRoZSBmaXJtd2FyZSwgYnV0IG15IGV4cGVyaWVuY2UgaXMgbm90aGluZyBjaGFu Z2VzIHVubGVzcyBpdCdzIGNyaXRpY2FsCj4+IHRvIGEgc3lzdGVtIHNoaXBwaW5nLgo+Cj4+ICAg IFRoZSBCSU9TJ3MgYXJlIGdldHRpbmcgYmV0dGVyLCBidXQgSSd2ZSBzZWVuIHR1cnRsZXMgcnVu IGZhc3Rlci4uLiA7LSkgLgo+Cj4gVGhhbmtmdWxseSwgdGhlcmUgYXJlIG5vdyBzb21lIG1vZGVy biBJbnRlbCBzeXN0ZW1zIG9uIHdoaWNoIHlvdSBjYW4gcnVuCj4gQ29yZWJvb3QuIFRoaXMgc2hv dWxkIGJlIGEgaHVnZSBiZW5lZml0IOKAlCB5b3Ugc2hvdWxkIGJlIGFibGUgdG8gYnVpbGQgYW4K PiB1cC10by1kYXRlIFRpYW5vY29yZSBhbmQgZGVwbG95IGl0IGFzIHlvdXIgQ29yZWJvb3QgcGF5 bG9hZCwgcmF0aGVyIHRoYW4KPiBoYXZpbmcgdG8gcHV0IHVwIHdpdGggdGhlIGNyYXAgdGhhdCdz IG9uIHRoZSBzeXN0ZW0gd2hlbiB5b3UgcmVjZWl2ZSBpdC4KPgo+CmV4Y2VwdCwgbW9zdCBzeXN0 ZW0gKGh3LCBvcywgYXBwbGljKSBjZXJ0aWZpY2F0aW9ucyBhcmUgYmFzZWQgb24gdmVuZG9yJ3MK c2hpcHBlZCBCSU9TLCBzbyBDb3JlYm9vdCBpc24ndCBhIGd1YXJhbnRlZSBlaXRoZXIuICBBZGRp dGlvbmFsbHksIHRlbGxpbmcKYSBjdXN0b21lciB0byByZXBsYWNlIHRoZWlyIHBhaWQtZm9yLUJJ T1MgZm9yIGEgYnVpbGQteW91ci1vd24tY29yZWJvb3QgYmlvcwppcyBhIHRvdWdoIHdheSB0byBj bG9zZSBhIGJ6LiA7LSkKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX18KaW9tbXUgbWFpbGluZyBsaXN0CmlvbW11QGxpc3RzLmxpbnV4LWZvdW5kYXRpb24ub3Jn Cmh0dHBzOi8vbGlzdHMubGludXhmb3VuZGF0aW9uLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2lvbW11