From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Durrant Subject: Re: [PATCH v2 2/2] x86/HVM: split page straddling emulated accesses in more cases Date: Tue, 4 Sep 2018 08:15:47 +0000 Message-ID: <374cf97a94194c4980c127dc01e709cc@AMSPEX02CL03.citrite.net> References: <5B87CF6302000078001E37A6@prv1-mh.provo.novell.com> <5B8D561F02000078001E4BED@prv1-mh.provo.novell.com> <5B8D56E602000078001E4C0B@prv1-mh.provo.novell.com> <131b993a872142deaa6a5c62487b9e03@AMSPEX02CL03.citrite.net> <5B8E37B202000078001E4F65@prv1-mh.provo.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from us1-rack-dfw2.inumbo.com ([104.130.134.6]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1fx6V5-0004Lb-JQ for xen-devel@lists.xenproject.org; Tue, 04 Sep 2018 08:15:51 +0000 In-Reply-To: <5B8E37B202000078001E4F65@prv1-mh.provo.novell.com> Content-Language: en-US List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: 'Jan Beulich' Cc: Andrew Cooper , Olaf Hering , xen-devel List-Id: xen-devel@lists.xenproject.org PiAtLS0tLU9yaWdpbmFsIE1lc3NhZ2UtLS0tLQo+IEZyb206IEphbiBCZXVsaWNoIFttYWlsdG86 SkJldWxpY2hAc3VzZS5jb21dCj4gU2VudDogMDQgU2VwdGVtYmVyIDIwMTggMDg6NDQKPiBUbzog UGF1bCBEdXJyYW50IDxQYXVsLkR1cnJhbnRAY2l0cml4LmNvbT4KPiBDYzogT2xhZiBIZXJpbmcg PG9sYWZAYWVwZmxlLmRlPjsgQW5kcmV3IENvb3Blcgo+IDxBbmRyZXcuQ29vcGVyM0BjaXRyaXgu Y29tPjsgeGVuLWRldmVsIDx4ZW4tCj4gZGV2ZWxAbGlzdHMueGVucHJvamVjdC5vcmc+Cj4gU3Vi amVjdDogUkU6IFtQQVRDSCB2MiAyLzJdIHg4Ni9IVk06IHNwbGl0IHBhZ2Ugc3RyYWRkbGluZyBl bXVsYXRlZAo+IGFjY2Vzc2VzIGluIG1vcmUgY2FzZXMKPiAKPiA+Pj4gT24gMDMuMDkuMTggYXQg MTg6MTUsIDxQYXVsLkR1cnJhbnRAY2l0cml4LmNvbT4gd3JvdGU6Cj4gPj4gRnJvbTogSmFuIEJl dWxpY2ggW21haWx0bzpKQmV1bGljaEBzdXNlLmNvbV0KPiA+PiBTZW50OiAwMyBTZXB0ZW1iZXIg MjAxOCAxNjo0NQo+ID4+Wy4uLl0KPiA+PiBUaGUgZXh0cmEgY2FsbCB0byBrbm93bl9nbGZuKCkg ZnJvbSBodm1lbXVsX3dyaXRlKCkgaXMganVzdCB0byBwcmVzZXJ2ZQo+ID4+IG9yaWdpbmFsIGJl aGF2aW9yOyB3ZSBzaG91bGQgY29uc2lkZXIgZHJvcHBpbmcgdGhpcyAoYWxzbyB0byBtYWtlIHN1 cmUKPiA+PiB0aGUgaW50ZW5kZWQgZWZmZWN0IG9mIDhjYmQ0ZmIwYjcgWyJ4ODYvaHZtOiBpbXBs ZW1lbnQKPiBodm1lbXVsX3dyaXRlKCkKPiA+PiB1c2luZyByZWFsIG1hcHBpbmdzIl0gaXMgYWNo aWV2ZWQgaW4gYWxsIGNhc2VzIHdoZXJlIGl0IGNhbiBiZSBhY2hpZXZlZAo+ID4+IHdpdGhvdXQg ZnVydGhlciByZXdvcmspLCBvciBhbHRlcm5hdGl2ZWx5IHdlIHBlcmhhcHMgb3VnaHQgdG8gbWly cm9yCj4gPj4gdGhpcyBpbiBodm1lbXVsX3JtdygpLgo+IAo+IElmIHlvdSByZWFsbHkgd2FudCBt ZSB0byBkbyB0aGUgY2hhbmdlIGJlbG93LCBjb3VsZCBJIGhhdmUgYW4KPiBvcGluaW9uIG9uIHRo ZSBhYm92ZSBhcyB3ZWxsLCBhcyB0aGlzIG1heSBpbXBseSBmdXJ0aGVyIHJlLXdvcmsKPiBvZiB0 aGUgcGF0Y2g/CgpJdCBzZWVtcyB0byBtZSB0aGF0IHRoZSBiZWhhdmlvdXIgc2hvdWxkIGJlIG1p cnJvcmVkIGluIGh2bWVtdWxfcm13KCkgdG8gYmUgY29ycmVjdC4KCj4gCj4gPj4gLS0tIGEveGVu L2FyY2gveDg2L2h2bS9lbXVsYXRlLmMKPiA+PiArKysgYi94ZW4vYXJjaC94ODYvaHZtL2VtdWxh dGUuYwo+ID4+IEBAIC0xMDQxLDYgKzEwNDEsMTEwIEBAIHN0YXRpYyBpbmxpbmUgaW50IGh2bWVt dWxfbGluZWFyX21taW9fd3IKPiA+PiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICBwZmVjLCBodm1lbXVsX2N0eHQsIHRyYW5zbGF0ZSk7Cj4gPj4gIH0KPiA+Pgo+ID4+ICtz dGF0aWMgYm9vbCBrbm93bl9nbGZuKHVuc2lnbmVkIGxvbmcgYWRkciwgdW5zaWduZWQgaW50IGJ5 dGVzLCB1aW50MzJfdAo+ID4+IHBmZWMpCj4gPj4gK3sKPiA+PiArICAgIGNvbnN0IHN0cnVjdCBo dm1fdmNwdV9pbyAqdmlvID0gJmN1cnJlbnQtPmFyY2guaHZtLmh2bV9pbzsKPiA+PiArCj4gPj4g KyAgICBpZiAoIHBmZWMgJiBQRkVDX3dyaXRlX2FjY2VzcyApCj4gPj4gKyAgICB7Cj4gPj4gKyAg ICAgICAgaWYgKCAhdmlvLT5tbWlvX2FjY2Vzcy53cml0ZV9hY2Nlc3MgKQo+ID4+ICsgICAgICAg ICAgICByZXR1cm4gZmFsc2U7Cj4gPj4gKyAgICB9Cj4gPj4gKyAgICBlbHNlIGlmICggcGZlYyAm IFBGRUNfaW5zbl9mZXRjaCApCj4gPj4gKyAgICB7Cj4gPj4gKyAgICAgICAgaWYgKCAhdmlvLT5t bWlvX2FjY2Vzcy5pbnNuX2ZldGNoICkKPiA+PiArICAgICAgICAgICAgcmV0dXJuIGZhbHNlOwo+ ID4+ICsgICAgfQo+ID4+ICsgICAgZWxzZSBpZiAoICF2aW8tPm1taW9fYWNjZXNzLnJlYWRfYWNj ZXNzICkKPiA+PiArICAgICAgICAgICAgcmV0dXJuIGZhbHNlOwo+ID4+ICsKPiA+PiArICAgIHJl dHVybiAodmlvLT5tbWlvX2dsYSA9PSAoYWRkciAmIFBBR0VfTUFTSykgJiYKPiA+PiArICAgICAg ICAgICAgKGFkZHIgJiB+UEFHRV9NQVNLKSArIGJ5dGVzIDw9IFBBR0VfU0laRSk7Cj4gPj4gK30K PiA+PiArCj4gPgo+ID4gV291bGQgaXQgYmUgcG9zc2libGUgdG8gc3BsaXQgdGhlIGludHJvZHVj dGlvbiBvZiB0aGUgYWJvdmUgZnVuY3Rpb24gaW50byBhCj4gPiBzZXBhcmF0ZSBwYXRjaD8gQUZB SUNUIGl0IGRvZXMgbm90IHNlZW0gdG8gYmUgaW50cmluc2ljYWxseSBpbnZvbHZlZCB3aXRoCj4g PiBoYW5kbGUgcGFnZSBzdHJhZGRsaW5nLiBJdCB3YXMgY2VydGFpbmx5IG5vdCB0aGVyZSBpbiB5 b3VyIFJGQyBwYXRjaC4KPiAKPiBUaGUgbmVlZCBmb3IgKG9yIGF0IGxlYXN0IGRlc2lyYWJpbGl0 eSBvZikgaXQgYmVjYW1lIG9idmlvdXMgd2l0aCB0aGUgYWRkaXRpb24KPiBvZiB0aGUgbG9naWMg dG8gdGhlIHdyaXRlIGFuZCBybXcgcGF0aHMuIEl0IF9jb3VsZF8gYmUgc3BsaXQgb3V0LCBidXQg aXQgbm93IGlzCj4gYSBzdHJpY3RseSBuZWNlc3NhcnkgcGFydC9wcmVyZXEgb2YgdGhlIGNoYW5n ZSBoZXJlLgoKSSB3YXMgdGhpbmtpbmcgaXQgd291bGQgYmUgY2xlYXJlciB0byBpbnRyb2R1Y2Ug a25vd25fZ2xmbigpIGluIGEgcGF0Y2ggcHJpb3IgdG8gdGhpcyBvbmUgYW5kIHRoZW4gdXNlIGl0 IGluIHRoZSBpZiBzdGF0ZW1lbnRzIGp1c3QgYWZ0ZXIgdGhlIGNhbGxzIHRvIGh2bWVtdWxfdmly dHVhbF90b19saW5lYXIoKSBpbiByZWFkIGFuZCB3cml0ZSwgcG9zc2libHkgcmUtd29ya2luZyBy bXcgYXQgdGhhdCBwb2ludCBhbHNvLgoKICBQYXVsCgo+IAo+IEphbgo+IAoKCl9fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxp c3QKWGVuLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0dHBzOi8vbGlzdHMueGVucHJvamVj dC5vcmcvbWFpbG1hbi9saXN0aW5mby94ZW4tZGV2ZWw=