From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jan Beulich" Subject: Re: [PATCH v2] x86/mm: also flush TLB when putting writable foreign page reference Date: Tue, 25 Apr 2017 05:59:10 -0600 Message-ID: <58FF562E0200007800153E6D@prv-mh.provo.novell.com> References: <58FF2C060200007800153D45@prv-mh.provo.novell.com> <58FF2C060200007800153D45@prv-mh.provo.novell.com> <20170425105954.GB43635@deinos.phlegethon.org> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1d2z7m-0005OE-Oy for xen-devel@lists.xenproject.org; Tue, 25 Apr 2017 11:59:18 +0000 In-Reply-To: <20170425105954.GB43635@deinos.phlegethon.org> Content-Disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Jann Horn , Tim Deegan Cc: Andrew Cooper , Julien Grall , xen-devel List-Id: xen-devel@lists.xenproject.org Pj4+IE9uIDI1LjA0LjE3IGF0IDEyOjU5LCA8dGltQHhlbi5vcmc+IHdyb3RlOgo+IEhpLAo+IAo+ IEF0IDAyOjU5IC0wNjAwIG9uIDI1IEFwciAoMTQ5MzA4OTE1OCksIEphbiBCZXVsaWNoIHdyb3Rl Ogo+PiBKYW5uJ3MgZXhwbGFuYXRpb24gb2YgdGhlIHByb2JsZW06Cj4+IAo+PiAic3RhcnQgc2l0 dWF0aW9uOgo+PiAgLSBkb21haW4gQSBhbmQgZG9tYWluIEIgYXJlIFBWIGRvbWFpbnMKPj4gIC0g ZG9tYWluIEEgYW5kIEIgYm90aCBoYXZlIGN1cnJlbnRseSBzY2hlZHVsZWQgdkNQVXMsIGFuZCB0 aGUgdkNQVXMKPj4gICAgYXJlIG5vdCBzY2hlZHVsZWQgYXdheQo+PiAgLSBkb21haW4gQSBoYXMg WFNNX1RBUkdFVCBhY2Nlc3MgdG8gZG9tYWluIEIKPj4gIC0gcGFnZSBYIGlzIG93bmVkIGJ5IGRv bWFpbiBCIGFuZCBoYXMgbm8gbWFwcGluZ3MKPj4gIC0gcGFnZSBYIGlzIHplcm9lZAo+PiAKPj4g IHN0ZXBzOgo+PiAgLSBkb21haW4gQSB1c2VzIGRvX21tdV91cGRhdGUoKSB0byBtYXAgcGFnZSBY IGluIGRvbWFpbiBBIGFzIHdyaXRhYmxlCj4+ICAtIGRvbWFpbiBBIGFjY2Vzc2VzIHBhZ2UgWCB0 aHJvdWdoIHRoZSBuZXcgUFRFLCBjcmVhdGluZyBhIFRMQiBlbnRyeQo+PiAgLSBkb21haW4gQSBy ZW1vdmVzIGl0cyBtYXBwaW5nIG9mIHBhZ2UgWAo+PiAgICAtIHR5cGUgY291bnQgb2YgcGFnZSBY IGdvZXMgdG8gMAo+PiAgICAtIHRsYmZsdXNoX3RpbWVzdGFtcCBvZiBwYWdlIFggaXMgYnVtcGVk Cj4+ICAtIGRvbWFpbiBCIG1hcHMgcGFnZSBYIGFzIEwxIHBhZ2V0YWJsZQo+PiAgICAtIHR5cGUg b2YgcGFnZSBYIGNoYW5nZXMgdG8gUEdUX2wxX3BhZ2VfdGFibGUKPj4gICAgLSBUTEIgZmx1c2gg aXMgZm9yY2VkIHVzaW5nIGRvbWFpbl9kaXJ0eV9jcHVtYXNrIG9mIGRvbWFpbiBCCj4+ICAgIC0g cGFnZSBYIGlzIG1hcHBlZCBhcyBMMSBwYWdldGFibGUgaW4gZG9tYWluIEIKPj4gCj4+ICBBdCB0 aGlzIHBvaW50LCBkb21haW4gQidzIHZDUFVzIGFyZSBndWFyYW50ZWVkIHRvIGhhdmUgbm8KPj4g IGluY29ycmVjdGx5LXR5cGVkIHN0YWxlIFRMQiBlbnRyaWVzIGZvciBwYWdlIFgsIGJ1dCBBRkFJ Q1MgZG9tYWluIEEncwo+PiAgdkNQVXMgY2FuIHN0aWxsIGhhdmUgc3RhbGUgVExCIGVudHJpZXMg dGhhdCBtYXAgcGFnZSBYIGFzIHdyaXRhYmxlLAo+PiAgcGVybWl0dGluZyBkb21haW4gQSB0byBj b250cm9sIGEgbGl2ZSBwYWdldGFibGUgb2YgZG9tYWluIEIuIgo+IAo+IEFJVUkgdGhpcyBwYXRj aCBzb2x2ZXMgdGhlIHByb2JsZW0gYnkgaW1tZWRpYXRlbHkgZmx1c2hpbmcgZG9tYWluIEEncwo+ IFRMQiBlbnRyaWVzIGF0IHRoZSBwb2ludCB3aGVyZSBkb21haW4gQSByZW1vdmVzIGl0cyBtYXBw aW5nIG9mIHBhZ2UgWC4KPiAKPiBDb3VsZCB3ZSwgaW5zdGVhZCwgYml0d2lzZSBPUiBkb21haW4g QSdzIGRvbWFpbl9kaXJ0eV9jcHVtYXNrIGludG8KPiBkb21haW4gQidzIGRvbWFpbl9kaXJ0eV9j cHVtYXNrIGF0IHRoZSBzYW1lIHBvaW50Pwo+IAo+IFRoZW4gd2hlbiBkb21haW4gQiBmbHVzaGVz IFRMQnMgaW4gdGhlIGxhc3Qgc3RlcCAoaW4gX19nZXRfcGFnZV90eXBlKCkpCj4gaXQgd2lsbCBj YXRjaCBhbnkgc3RhbGUgVExCIGVudHJpZXMgZnJvbSBkb21haW4gQSBhcyB3ZWxsLiAgQnV0IGlu IHRoZQo+IChob3BlZnVsbHkgY29tbW9uKSBjYXNlIHdoZXJlIHRoZXJlJ3MgYSBkZWxheSBiZXR3 ZWVuIGRvbWFpbiBBJ3MKPiBfX3B1dF9wYWdlX3R5cGUoKSBhbmQgZG9tYWluIEIncyBfX2dldF9w YWdlX3R5cGUoKSwgdGhlIHVzdWFsIFRMQgo+IHRpbWVzdGFtcCBmaWx0ZXJpbmcgd2lsbCBzdXBw cmVzcyBzb21lIG9mIHRoZSBJUElzL2ZsdXNoZXMuCgpPaCwgSSBzZWUuIFllcywgSSB0aGluayB0 aGlzIHdvdWxkIGJlIGZpbmUuIEhvd2V2ZXIsIHdlIGRvbid0IGhhdmUKYSBzdWl0YWJsZSBjcHVt YXNrIGFjY2Vzc29yIGFsbG93aW5nIHVzIHRvIGRvIHRoaXMgT1JpbmcgYXRvbWljYWxseSwKc28g d2UnZCBoYXZlIHRvIG9wZW4gY29kZSBpdC4gRG8geW91IHRoaW5rIHN1Y2ggYSBzbGlnaHRseSB1 Z2x5CmFwcHJvYWNoIHdvdWxkIGJlIHdvcnRoIGl0IGhlcmU/IEZvcmVpZ24gbWFwcGluZ3Mgc2hv dWxkbid0IGJlCl90aGF0XyBwZXJmb3JtYW5jZSBjcml0aWNhbC4uLgoKQW5kIHRoZW4sIGNvbnNp ZGVyaW5nIHRoYXQgdGhpcyB3aWxsIHJlc3VsdCBpbiB0aW1lIHN0YW1wIGJhc2VkIGZpbHRlcmlu ZwphZ2FpbiwgSSdtIG5vIGxvbmdlciBzdXJlIEkgd2FzIHJpZ2h0IHRvIGFncmVlIHdpdGggSmFu biBvbiB0aGUgZmx1c2gKaGVyZSBuZWVkaW5nIHRvIGJlIHVuY29uZGl0aW9uYWwuIFJlZ2FyZGxl c3Mgb2YgcGFnZSB0YWJsZSBvd25lcgptYXRjaGluZyBwYWdlIG93bmVyLCB0aGUgdGltZSBzdGFt cCBzdG9yZWQgZm9yIHRoZSBwYWdlIHdpbGwgYWx3YXlzCmJlIGFwcGxpY2FibGUgKGl0J3MgYSBn bG9iYWwgcHJvcGVydHkpLiBTbyB3ZSB3b3VsZG4ndCBldmVuIG5lZWQgdG8KT1IgaW4gdGhlIHdo b2xlIGRpcnR5IG1hc2sgaGVyZSwgYnV0IGNvdWxkIGFscmVhZHkgcHJlLWZpbHRlciAob3IgaWYg d2UKc3RheWVkIHdpdGggdGhlIGZsdXNoLW9uLXB1dCBhcHByb2FjaCwgdGhlbiB2MSB3b3VsZCBo YXZlIGJlZW4KY29ycmVjdCkuCgpKYW4KCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fXwpYZW4tZGV2ZWwgbWFpbGluZyBsaXN0Clhlbi1kZXZlbEBsaXN0cy54 ZW4ub3JnCmh0dHBzOi8vbGlzdHMueGVuLm9yZy94ZW4tZGV2ZWwK