From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jan Beulich" Subject: Re: Ping: [PATCH v3 0/4] x86/HVM: implement memory read caching Date: Thu, 11 Oct 2018 00:51:01 -0600 Message-ID: <5BBEF2D502000078001F09F7@prv1-mh.provo.novell.com> References: <5B97BEB202000078001E73FB@prv1-mh.provo.novell.com> <5BAA42D102000078001EBBEB@prv1-mh.provo.novell.com> <5BB34A1102000078001EDABE@prv1-mh.provo.novell.com> <57c23678-c8e6-d6d8-f0de-38a48b8936f2@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from all-amaz-eas1.inumbo.com ([34.197.232.57]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1gAUoL-00063v-G9 for xen-devel@lists.xenproject.org; Thu, 11 Oct 2018 06:51:05 +0000 In-Reply-To: <57c23678-c8e6-d6d8-f0de-38a48b8936f2@citrix.com> Content-Disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Andrew Cooper Cc: George Dunlap , xen-devel , Paul Durrant List-Id: xen-devel@lists.xenproject.org Pj4+IE9uIDAyLjEwLjE4IGF0IDEyOjUxLCA8YW5kcmV3LmNvb3BlcjNAY2l0cml4LmNvbT4gd3Jv dGU6Cj4gT24gMDIvMTAvMTggMTE6MzYsIEphbiBCZXVsaWNoIHdyb3RlOgo+Pj4+PiBPbiAyNS4w OS4xOCBhdCAxNjoxNCwgPEpCZXVsaWNoQHN1c2UuY29tPiB3cm90ZToKPj4+IEVtdWxhdGlvbiBy ZXF1aXJpbmcgZGV2aWNlIG1vZGVsIGFzc2lzdGFuY2UgdXNlcyBhIGZvcm0gb2YgaW5zdHJ1Y3Rp b24KPj4+IHJlLWV4ZWN1dGlvbiwgYXNzdW1pbmcgdGhhdCB0aGUgc2Vjb25kIChhbmQgYW55IGZ1 cnRoZXIpIHBhc3MgdGFrZXMKPj4+IGV4YWN0bHkgdGhlIHNhbWUgcGF0aC4gVGhpcyBpcyBhIHZh bGlkIGFzc3VtcHRpb24gYXMgZmFyIGFzIHVzZSBvZiBDUFUKPj4+IHJlZ2lzdGVycyBnb2VzIChh cyB0aG9zZSBjYW4ndCBjaGFuZ2Ugd2l0aG91dCBhbnkgb3RoZXIgaW5zdHJ1Y3Rpb24KPj4+IGV4 ZWN1dGluZyBpbiBiZXR3ZWVuKSwgYnV0IGlzIHdyb25nIGZvciBtZW1vcnkgYWNjZXNzZXMuIElu IHBhcnRpY3VsYXIKPj4+IGl0IGhhcyBiZWVuIG9ic2VydmVkIHRoYXQgV2luZG93cyBtaWdodCBw YWdlIG91dCBidWZmZXJzIHVuZGVybmVhdGgKPj4+IGFuIGluc3RydWN0aW9uIGN1cnJlbnRseSB1 bmRlciBlbXVsYXRpb24gKGhpdHRpbmcgYmV0d2VlbiB0d28gcGFzc2VzKS4KPj4+IElmIHRoZSBm aXJzdCBwYXNzIHRyYW5zbGF0ZWQgYSBsaW5lYXIgYWRkcmVzcyBzdWNjZXNzZnVsbHksIGFueSBz dWJzZXF1ZW50Cj4+PiBwYXNzIG5lZWRzIHRvIGRvIHNvIHRvbywgeWllbGRpbmcgdGhlIGV4YWN0 IHNhbWUgdHJhbnNsYXRpb24uCj4+Pgo+Pj4gSW50cm9kdWNlIGEgY2FjaGUgKHVzZWQganVzdCBi eSBndWVzdCBwYWdlIHRhYmxlIGFjY2Vzc2VzIGZvciBub3csIGkuZS4KPj4+IGEgZm9ybSBvZiAi cGFnaW5nIHN0cnVjdHVyZSBjYWNoZSIpIHRvIG1ha2Ugc3VyZSBhYm92ZSBkZXNjcmliZWQKPj4+ IGFzc3VtcHRpb24gaG9sZHMuIFRoaXMgaXMgYSB2ZXJ5IHNpbXBsaXN0aWMgaW1wbGVtZW50YXRp b24gZm9yIG5vdzogT25seQo+Pj4gZXhhY3QgbWF0Y2hlcyBhcmUgc2F0aXNmaWVkIChubyBvdmVy bGFwcyBvciBwYXJ0aWFsIHJlYWRzIG9yIGFueXRoaW5nKS4KPj4+Cj4+PiBUaGVyZSdzIGFsc28g c29tZSBzZWVtaW5nbHkgdW5yZWxhdGVkIGNsZWFudXAgaGVyZSB3aGljaCB3YXMgZm91bmQKPj4+ IGRlc2lyYWJsZSBvbiB0aGUgd2F5Lgo+Pj4KPj4+IDE6IHg4Ni9tbTogYWRkIG9wdGlvbmFsIGNh Y2hlIHRvIEdMQS0+R0ZOIHRyYW5zbGF0aW9uCj4+PiAyOiB4ODYvbW06IHVzZSBvcHRpb25hbCBj YWNoZSBpbiBndWVzdF93YWxrX3RhYmxlcygpCj4+PiAzOiB4ODYvSFZNOiBpbXBsZW1lbnQgbWVt b3J5IHJlYWQgY2FjaGluZwo+Pj4gNDogeDg2L0hWTTogcHJlZmlsbCBjYWNoZSB3aXRoIFBEUFRF cyB3aGVuIHBvc3NpYmxlCj4+Pgo+Pj4gQXMgZm9yIHYyLCBJJ20gb21pdHRpbmcgIlZNWDogY29y cmVjdCBQRFBURSBsb2FkIGNoZWNrcyIgZnJvbSB2MywgYXMgSQo+Pj4gY2FuJ3QgY3VycmVudGx5 IGZpbmQgZW5vdWdoIHRpbWUgdG8gY2Fycnkgb3V0IHRoZSByZXF1ZXN0ZWQgZnVydGhlcgo+Pj4g cmV3b3JrLgo+PiBBbmRyZXcsIEdlb3JnZT8KPiAKPiBZb3UndmUgbm90IGZpeGVkIGFueXRoaW5n IGZyb20gbXkgY29uY2VybnMgd2l0aCB2MS4KPiAKPiBUaGlzIGRvZXNuJ3QgYmVoYXZlIGxpa2Ug cmVhbCBoYXJkd2FyZSwgYW5kIGRlZmluaXRlbHkgZG9lc24ndCBiZWhhdmUgYXMKPiBuYW1lZCAt ICJzdHJ1Y3QgaHZtZW11bF9jYWNoZSIgaXMgc2ltcGx5IGZhbHNlLiAgSWYgaXQgd2VyZSBuYW1l ZAo+IGh2bWVtdWxfcHNjIChvciBzb21lIG90aGVyIHZhcmlhdGlvbiBvbiBQYWdpbmcgU3RydWN0 dXJlIENhY2hlKSB0aGVuIGl0Cj4gd291bGRuJ3QgYmUgc28gYmFkLCBhcyB0aGUgaW5kaXZpZHVh bCBsZXZlbHMgZG8gbWFrZSBtb3JlIHNlbnNlIGluIHRoYXQKPiBjb250ZXh0IChub3QgdGhhdCBp dCB3b3VsZCBtYWtlIHRoZSBiZWhhdmlvdXIgYW55IGNsb3NlciB0byBob3cgaGFyZHdhcmUKPiBh Y3R1YWxseSB3b3JrcykuCj4gCj4gSSdtIGFsc28gbm90IG92ZXJseSBoYXBweSB3aXRoIHRoZSBj b25kaXRpb25hbCBuYXR1cmUgb2YgdGhlIGNhY2hpbmcsIG9yCj4gdGhhdCBpdCBpc24ndCBhIHRy YW5zcGFyZW50IHJlYWQtdGhyb3VnaCBjYWNoZS4gIFRoaXMgbGVhZHMgdG8gYSBsYXJnZQo+IGFt b3VudCBvZiBib2lsZXJwbGF0ZSBjb2RlIGZvciBldmVyeSB1c2VyLgoKU28gYWZ0ZXIgdGhlIGNh bGwgeWVzdGVyZGF5IEkndmUgYmVlbiB0aGlua2luZyBhYm91dCB0aGlzIHNvbWUgbW9yZSwKY29t aW5nIHRvIHRoZSBjb25jbHVzaW9uIHRoYXQgaXQgaXMgYWN0dWFsbHkgd2hhdCB5b3UgYXNrIGZv ciB0aGF0CndvdWxkIGVuZCB1cCBiZWluZyBhcmNoaXRlY3R1cmFsbHkgaW5jb3JyZWN0LgoKRmly c3Qgb2YgYWxsLCB0aGVyZSdzIGFic29sdXRlbHkgbm8gd2F5IHRvIGltcGxlbWVudCBhIGdlbmVy YWwgcHVycG9zZQpjYWNoZSB0aGF0J3MgbWltaWMtaW5nIGhhcmR3YXJlIGJlaGF2aW9yLiBUaGlz IGlzIHNpbXBseSBiZWNhdXNlIHdlCmNhbm5vdCBvYnNlcnZlIHJlbW92ZSAodilDUFUtcycgd3Jp dGVzIHRvIHRoZSBjYWNoZWQgYXJlYXMuCgpXaGF0IHdlIGluc3RlYWQgbmVlZCBpcyBhIHN0b3Jl IHdoZXJlIHdlIGNhbiByZXRhaW4gdGhlIHJlc3VsdCBvZgpldmVyeSBpbmRlcGVuZGVudCBtZW1v cnkgcmVhZC4gTGV0IG1lIGlsbHVzdHJhdGUgdGhpcyBhdCB0aGUKZXhhbXBsZSBvZiB0aGUgZ2F0 aGVyIGZhbWlseSBvZiBpbnN0cnVjdGlvbnM6IExldCdzIGFzc3VtZSBzdWNoIGFuCmluc3RydWN0 aW9uIGhhcyBpdHMgW3h5el1tbSBpbmRleCByZWdpc3RlciBhbGwgemVyby4gVGhpcyB3aWxsIHBy b2R1Y2UKdXAgdG8gMTYgcmVhZHMgZnJvbSBleGFjdGx5IHRoZSBzYW1lIG1lbW9yeSBsb2NhdGlv bi4gRWFjaCBvZgp0aGVzZSByZWFkcyBpcyBhbiBpbmRlcGVuZGVudCBvbmUsIGFuZCBoZW5jZSBl YWNoIG9mIHRoZW0gaXMKbGlhYmxlIHRvIG9ic2VydmUgZGlmZmVyZW50IHZhbHVlcyAoZHVlIHRv IHRoZSBjb2hlcmVudCBuYXR1cmUgb2YKdGhlIHByb2Nlc3NvciBjYWNoZXMgYW5kIHRoZWlyIHBy b3RvY29sKSwgaWYgYW5vdGhlciBDUFUgdXBkYXRlcwp0aGUgbG9jYXRpb24gZnJlcXVlbnRseSBl bm91Z2guIEFzIGEgcmVzdWx0LCB0byBjb3JyZWN0bHkgcmVwbGF5CihwYXJ0cyBvZikgc3VjaCBh biBpbnN0cnVjdGlvbiwgd2UnZCBoYXZlIHRvIHN0b3JlIHVwIHRvIDE2CmRpZmZlcmVudCB2YWx1 ZXMgYWxsIGZvciB0aGUgc2FtZSBwaHlzaWNhbCBtZW1vcnkgc2xvdC4gT2J2aW91c2x5CnRvIGRp c3Rpbmd1aXNoIHRoZW0gd2UnZCBuZWVkIHRvIHNvbWVob3cgdGFnIHRoZW0uCgpUaGlzIGlzIHdo eSB0aGUgY3VycmVudCBzZXJpZXMgZG9lcyBub3QgdHJ5IHRvIHVzZSB0aGUgImNhY2hlIiBmb3IK b3RoZXIgdGhhbiBwYWdlIHRhYmxlIGVsZW1lbnRzIChidXQgbGVhdmVzIGl0IHBvc3NpYmxlIGZv ciB0aGlzCnRvIGJlIGFkZGVkIGxhdGVyLCB3aXRob3V0IHJlbmFtaW5nIGFueXRoaW5nKS4gV2Un ZCBoYXZlIHRvCmhhdmUgdGhlIGluc24gZW11bGF0b3IgbGF5ZXIgKG9yIHRoZSBsYXRlc3QgdGhl IHRvcCBsZXZlbApodm1lbXVsXyooKSBob29rcykgcHJvZHVjZSBzdWNoIHRhZ3MsIHJlcXVpcmlu ZyBhbiBleHRlbnNpb24KdG8gdGhlIGVtdWxhdG9yIG1lbW9yeSBhY2Nlc3MgaG9va3MuCgpOb3cg dGhlIHNhbWUgY29uc2lkZXJhdGlvbiBhcHBsaWVzIHRvIHBhZ2UgdGFibGUgcmVhZHM6IEVhY2gK bGV2ZWwncyByZWFkIGlzIGFuIGluZGVwZW5kZW50IG9uZSwgYW5kIHRoZXJlZm9yZSBtYXkgb2Jz ZXJ2ZQphIHZhbHVlIGRpZmZlcmVudCBmcm9tIGEgaGlnaGVyIGxldmVsJ3MgcmVhZCBldmVuIGlm IHRoZSBzYW1lCnBoeXNpY2FsIHNsb3QgaXMgcmVmZXJlbmNlZCAodmlhIHJlY3Vyc2l2ZSBwYWdl IHRhYmxlcykuIEhlcmUsCmhvd2V2ZXIsIHdlJ3JlIGluIHRoZSAibHV4dXJ5IiBwb3NpdGlvbiB0 aGF0IHdlIGhhdmUgYm90aAoibmF0dXJhbCIgdGFnZ2luZyAodGhlIHBhZ2UgdGFibGUgbGV2ZWwp LCBhbmQgd2UgZG9uJ3QgbmVlZCB0bwpjYXJlIGFib3V0IHN1YnNlcXVlbnQgd3JpdGVzIChvdGhl ciB0aGFuIHRoZSBnZW5lcmFsIHB1cnBvc2UKY2FjaGUsIHRoZSBwYWdpbmcgc3RydWN0dXJlIGNh Y2hlcyBkb24ndCAic25vb3AiIGxhdGVyIHdyaXRlcywKYnV0IHJlcXVpcmUgYWN0aXZlIGludmFs aWRhdGlvbikuIEl0IGlzIG15IHVuZGVyc3RhbmRpbmcgdGhhdAp0aGUgZGlmZmVyZW50IHBhZ2Ug dGFibGUgbGV2ZWxzIGhhdmUsIGluIGhhcmR3YXJlLCBlbnRpcmVseQppbmRlcGVuZGVudCBwYWdp bmcgc3RydWN0dXJlIGNhY2hlcywgaS5lLiBhIGxldmVsIDMgcmVhZCB3b3VsZApub3QgYmUgc2F0 aXNmaWVkIGJ5IGEgbGV2ZWwgNCBQU0MgZW50cnk7IGluIGZhY3QgSSB0aGluayB0aGUgc3BlYwpk b2VzIG5vdCBleGNsdWRlIGVpdGhlciBvcHRpb24sIGJ1dCBzdWdnZXN0cyBzdWNoIGFuCmluZGVw ZW5kZW50IGJlaGF2aW9yIGFzIHRoZSBjdXJyZW50IGNob2ljZSBvZiBpbXBsZW1lbnRhdGlvbi4K ClNpbWlsYXJseSB0aGVyZSdzIHRoZSB3cml0ZSBiZWhhdmlvcjogV2Ugc3BlY2lmaWNhbGx5IHdv dWxkCnJlcXVpcmUgaW5zbiBvcGVyYW5kIHdyaXRlcyB0byBfbm90XyB1cGRhdGUgdGhlICJjYWNo ZSIsIGFzCmR1cmluZyByZXBsYXkgd2Ugc3RpbGwgbmVlZCB0byBzZWUgdGhlIG9yaWdpbmFsIHZh bHVlOyB0aGUKYWZvcmVtZW50aW9uZWQgdGFnZ2luZyB3b3VsZCBwcmV2ZW50IHRoaXMuIFRoZSBl eGNlcHRpb24KaGVyZSBpcyB0aGUgc2V0dGluZyBvZiBBL0QgYml0cyBkdXJpbmcgcGFnZSB0YWJs ZSB3YWxrczogT24KcmVwbGF5IHdlIF9kb18gd2FudCB0byBvYnNlcnZlIHRoZW0gc2V0IGlmIHRo ZSBmaXJzdCBydW4KdGhyb3VnaCBoYWQgdG8gc2V0IHRoZW0uIChUaGUgc2FtZSB3b3VsZCBpbW8g YXBwbHkgdG8Kc2V0dGluZyBkZXNjcmlwdG9yIHRhYmxlIGFjY2Vzc2VkIGJpdHMsIGJ0dy4pCgpB cyB0byB0aGUgdGVybSAiY2FjaGUiIC0gd291bGQgImxhdGNoIiBwZXJoYXBzIGJlIGEgYmV0dGVy IG5hbWUKdG8gcmVmbGVjdCB0aGUgcHVycG9zZT8KCkZpbmFsbHkgYSB3b3JkIG9uIHlvdXIgZGVz aXJlIG9mIG1ha2luZyB0aGlzIGEgdHJhbnNwYXJlbnQgdGhpbmcKcmF0aGVyIHRoYW4gc29tZXRo aW5nIGhhbmRlZCB0aHJvdWdoIGFzIGZ1bmN0aW9uIGFyZ3VtZW50czoKQWxtb3N0IGV2ZXJ5dGhp bmcgZW5kcyB1cCBpbiBfX2h2bV9jb3B5KCkuIFRoZXJlZm9yZSwKd2l0aG91dCBhIHJlc3BlY3Rp dmUgZnVuY3Rpb24gYXJndW1lbnQsIHdlJ2QgbmVlZCB0byBnbG9iYWxseQpyZWNvcmQgc3RhdGUg b24gdGhlIHZDUFUgYXMgdG8gd2hldGhlciBhIHBhcnRpY3VsYXIgbWVtb3J5CmFjY2VzcyBvdWdo dCB0byBjb25zdWx0IC8gdXBkYXRlIHRoZSAiY2FjaGUiLiBNZW1vcnkgYWNjZXNzZXMKZG9uZSBp biB0aGUgY29udGV4dCBvZiBoeXBlcmNhbGxzLCBmb3IgZXhhbXBsZSwgYXJlIHNwZWNpZmljYWxs eQpub3Qgc3VwcG9zZWQgdG8gdG91Y2ggdGhhdCAiY2FjaGUiIC0gbm90IG9ubHkgYmVjYXVzZSB0 aGF0J3MKbm90IGhvdyBoeXBlcmNhbGxzIGFyZSBzdXBwb3NlZCB0byBiZWhhdmUgKHRoZXkgYXJl IHJlcXVpcmVkCnRvIHJlYWQgZ3Vlc3QgbWVtb3J5IGV4YWN0bHkgb25jZSBvbmx5IGFueXdheSks IGJ1dCBhbHNvCmJlY2F1c2Ugd2hhdGV2ZXIgc2l6ZSB3ZSdkIG1ha2UgdGhhdCAiY2FjaGUiLCBh IGxhcmdlCmVub3VnaCBiYXRjaGVkIGh5cGVyY2FsbCBjb3VsZCBleGNlZWQgdGhhdCBzaXplLgoK SSdtIG5vdCBtZWFuaW5nIHRvIHNheSB0aGlzIGlzIGltcG9zc2libGUgdG8gaW1wbGVtZW50IGNv cnJlY3RseSwKYnV0IEkgdGhpbmsgZ29pbmcgdGhlIGZ1bmN0aW9uIGFyZ3VtZW50IHJvdXRlIGlz IGZhciBlYXNpZXIgdG8KcHJvdmUgY29ycmVjdCwgc2luY2UgYXQgdGhlIHJlbGV2YW50IGxheWVy KHMpIG9mIGEgY2FsbCB0cmVlIHlvdQpjYW4gc2VlIHdoZXRoZXIgImNhY2hpbmciIGlzIGludGVu ZGVkIHRvIGJlIGluIGVmZmVjdCBvciBub3QuCgpKYW4KCgpfX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fXwpYZW4tZGV2ZWwgbWFpbGluZyBsaXN0Clhlbi1kZXZl bEBsaXN0cy54ZW5wcm9qZWN0Lm9yZwpodHRwczovL2xpc3RzLnhlbnByb2plY3Qub3JnL21haWxt YW4vbGlzdGluZm8veGVuLWRldmVs