From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc Zyngier Subject: Re: [PATCH v3 7/9] KVM: arm/arm64: Only clean the dcache on translation fault Date: Tue, 21 Aug 2018 16:08:56 +0100 Message-ID: <4d1c7d3b-4abe-fa8d-31ac-7a98ec349db1@arm.com> References: <20171023161122.15291-1-marc.zyngier@arm.com> <20171023161122.15291-8-marc.zyngier@arm.com> <9fa7efdf-1c21-7b07-edb9-0c7d0d91eaed@arm.com> <2686ddfc-935a-18e0-46bd-0cb608ae44e1@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id C982E4A1DC for ; Tue, 21 Aug 2018 11:09:01 -0400 (EDT) Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id GvrQGNoFPazN for ; Tue, 21 Aug 2018 11:09:00 -0400 (EDT) Received: from foss.arm.com (foss.arm.com [217.140.101.70]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 4EF1A4A1DB for ; Tue, 21 Aug 2018 11:09:00 -0400 (EDT) In-Reply-To: <2686ddfc-935a-18e0-46bd-0cb608ae44e1@suse.de> Content-Language: en-GB List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu To: Alexander Graf , Christoffer Dall , Catalin Marinas , Will Deacon Cc: linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu List-Id: kvmarm@lists.cs.columbia.edu T24gMjEvMDgvMTggMTU6MDgsIEFsZXhhbmRlciBHcmFmIHdyb3RlOgo+IE9uIDA4LzIxLzIwMTgg MDM6NTcgUE0sIE1hcmMgWnluZ2llciB3cm90ZToKPj4gT24gMjEvMDgvMTggMTQ6MzUsIEFsZXhh bmRlciBHcmFmIHdyb3RlOgo+Pj4gT24gMTAvMjMvMjAxNyAwNjoxMSBQTSwgTWFyYyBaeW5naWVy IHdyb3RlOgo+Pj4+IFRoZSBvbmx5IGNhc2Ugd2hlcmUgd2UgYWN0dWFsbHkgbmVlZCB0byBwZXJm b3JtIGEgZGNhY2hlIG1haW50ZW5hbmNlCj4+Pj4gaXMgd2hlbiB3ZSBtYXAgdGhlIHBhZ2UgZm9y IHRoZSBmaXJzdCB0aW1lLCBhbmQgc3Vic2VxdWVudCBwZXJtaXNzaW9uCj4+Pj4gZmF1bHRzIGRv IG5vdCByZXF1aXJlIGNhY2hlIG1haW50ZW5hbmNlLiBMZXQncyBtYWtlIGl0IGNvbmRpdGlvbmFs Cj4+Pj4gb24gbm90IGJlaW5nIGEgcGVybWlzc2lvbiBmYXVsdCAoYW5kIHRodXMgYSB0cmFuc2xh dGlvbiBmYXVsdCkuCj4+Pj4KPj4+PiBSZXZpZXdlZC1ieTogQ2hyaXN0b2ZmZXIgRGFsbCA8Y2hy aXN0b2ZmZXIuZGFsbEBsaW5hcm8ub3JnPgo+Pj4+IFNpZ25lZC1vZmYtYnk6IE1hcmMgWnluZ2ll ciA8bWFyYy56eW5naWVyQGFybS5jb20+Cj4+PiBUaGlzIHBhdGNoIHVuZm9ydHVuYXRlbHkgYnJl YWtzIHNvbWV0aGluZyBvbiBIaTE2MTYgU29DcyB3aGVuIHJ1bm5pbmcKPj4+IDMyYml0IGd1ZXN0 cy4gV2l0aCB0aGlzIHBhdGNoIGFwcGxpZWQgKGFuZCB0aHVzIHdpdGggNC4xOCkgSSBnZXQgcmFu ZG9tCj4+PiBpbGxlZ2FsIGluc3RydWN0aW9uIHdhcm5pbmdzIGZyb20gMzJiaXQgY29kZSBpbnNp ZGUgVk1zLiBJIGRvIG5vdCBrbm93Cj4+PiBhdCB0aGlzIHBvaW50IHdoZXRoZXIgdGhpcyBhZmZl Y3RzIG90aGVyIENQVXMgYXMgd2VsbC4KPj4gQ2FuIHlvdSBwbGVhc2UgZ2l2ZSBhIGZldyBtb3Jl IGRldGFpbHM/Cj4+Cj4+IC0gd2hhdCBhcmUgdGhlIENQVXMgb24gdGhpcyBIaTE2MTY/IEF0IGxl YXN0IGEgL3Byb2MvY3B1aW5mbyB3b3VsZCBoZWxwCj4gCj4gVGhlc2UgYXJlIEE3MnM6Cj4gCj4g cHJvY2Vzc29ywqDCoMKgIDogMAo+IEJvZ29NSVBTwqDCoMKgIDogMTAwLjAwCj4gRmVhdHVyZXPC oMKgwqAgOiBmcCBhc2ltZCBldnRzdHJtIGFlcyBwbXVsbCBzaGExIHNoYTIgY3JjMzIgY3B1aWQK PiBDUFUgaW1wbGVtZW50ZXLCoMKgwqAgOiAweDQxCj4gQ1BVIGFyY2hpdGVjdHVyZTogOAo+IENQ VSB2YXJpYW50wqDCoMKgIDogMHgwCj4gQ1BVIHBhcnTCoMKgwqAgOiAweGQwOAo+IENQVSByZXZp c2lvbsKgwqDCoCA6IDIKPiAKPj4KPj4gLSBhbiBleGFtcGxlIG9mIHRoZSBjcmFzaD8gSXMgaXQg d2l0aGluIHRoZSBkZWNvbXByZXNzb3I/IEFmdGVyPyBUaGlzCj4+IHRoaW5ncyBkbyBtYXR0ZXIs IGdpdmVuIHRoZSBudW1iZXIgb2YgY3JhenkgdGhpbmdzIHRoZSAzMmJpdCBrZXJuZWwgZG9lcwo+ IAo+IFRoZXkgYXJlIGFsd2F5cyBpbiB1c2VyIHNwYWNlLiBNeSBjdXJyZW50IHJlcHJvZHVjZXIg aXMgdGhpczoKPiAKPiAgwqAgJCB3aGlsZSBycG0gLXFhID4gL2Rldi9udWxsOyBkbyA6OyBkb25l Cj4gCj4gSWYgSSBydW4gdGhpcyBpbiBwYXJhbGxlbCB3aXRoIHNvbWV0aGluZyB0aGF0IGp1c3Qg cG9wdWxhdGVzIFJBTSAoZGQgCj4gaWY9L2Rldi9udm1lMG4xIG9mPS9kZXYvbnVsbCBicz0xMEcp IEkgZ2V0IGFuIGlsbGVnYWwgaW5zdHJ1Y3Rpb24gZmF1bHQgCj4gd2l0aGluIHNlY29uZHM6Cj4g Cj4gc2gtNC40IyB3aGlsZSBycG0gLXFhID4gL2Rldi9udWxsOyBkbyB0cnVlOyBkb25lCj4gSWxs ZWdhbCBpbnN0cnVjdGlvbiAoY29yZSBkdW1wZWQpCj4gCj4gCj4+IC0gYSBob3N0IGtlcm5lbCBj b25maWd1cmF0aW9uPwo+IAo+IEhvc3Qga2VybmVsIGNvbmZpZ3VyYXRpb24gaXMganVzdCB0aGUg bm9ybWFsIG9wZW5TVVNFIG9uZToKPiAKPiBodHRwczovL2tlcm5lbC5vcGVuc3VzZS5vcmcvY2dp dC9rZXJuZWwtc291cmNlL3BsYWluL2NvbmZpZy9hcm02NC9kZWZhdWx0P2g9c3RhYmxlCj4gCj4+ PiBJZiBhbnlvbmUgaXMgaW50ZXJlc3RlZCBpbiBhIHJlcHJvZHVjZXIsIEkgaGF2ZSBzb21ldGhp bmcgaGFuZHkuIEJ1dCBmb3IKPj4+IG5vdyBJIGJlbGlldmUgd2Ugc2hvdWxkIGp1c3QgcmV2ZXJ0 IHRoaXMgcGF0Y2guCj4+IEJlZm9yZSB3ZSByZXZlcnQgYW55dGhpbmcsIEknZCBsaWtlIHRvIHVu ZGVyc3RhbmQgd2hhdCBpcyBoYXBwZW5pbmcuCj4gCj4gWWVhaCwgSSBkaWRuJ3QgcmVhbGl6ZSB0 aGUgY29tbWl0IGlzIGFscmVhZHkgaW4gc2luY2UgNC4xNiwgc28gSSBhZ3JlZS4gCj4gSSdsbCBi aXNlY3QgYSBiaXQsIGJ1dCBpdCBtYXkgdGFrZSBhIHdoaWxlLgoKRG8geW91IG1pbmQgZ2l2aW5n IHRoaXMgYSB0cnk/CgpkaWZmIC0tZ2l0IGEvdmlydC9rdm0vYXJtL21tdS5jIGIvdmlydC9rdm0v YXJtL21tdS5jCmluZGV4IDFkOTBkNzk3MDZiZC4uZGY4ZjNkNWVhYTIyIDEwMDY0NAotLS0gYS92 aXJ0L2t2bS9hcm0vbW11LmMKKysrIGIvdmlydC9rdm0vYXJtL21tdS5jCkBAIC0xNTMxLDcgKzE1 MzYsNyBAQCBzdGF0aWMgaW50IHVzZXJfbWVtX2Fib3J0KHN0cnVjdCBrdm1fdmNwdSAqdmNwdSwg cGh5c19hZGRyX3QgZmF1bHRfaXBhLAogCQkJa3ZtX3NldF9wZm5fZGlydHkocGZuKTsKIAkJfQog Ci0JCWlmIChmYXVsdF9zdGF0dXMgIT0gRlNDX1BFUk0pCisJCWlmIChmYXVsdF9zdGF0dXMgIT0g RlNDX1BFUk0gfHwgd3JpdGVfZmF1bHQpCiAJCQljbGVhbl9kY2FjaGVfZ3Vlc3RfcGFnZShwZm4s IFBNRF9TSVpFKTsKIAogCQlpZiAoZXhlY19mYXVsdCkgewpAQCAtMTU1Myw3ICsxNTU4LDcgQEAg c3RhdGljIGludCB1c2VyX21lbV9hYm9ydChzdHJ1Y3Qga3ZtX3ZjcHUgKnZjcHUsIHBoeXNfYWRk cl90IGZhdWx0X2lwYSwKIAkJCW1hcmtfcGFnZV9kaXJ0eShrdm0sIGdmbik7CiAJCX0KIAotCQlp ZiAoZmF1bHRfc3RhdHVzICE9IEZTQ19QRVJNKQorCQlpZiAoZmF1bHRfc3RhdHVzICE9IEZTQ19Q RVJNIHx8IHdyaXRlX2ZhdWx0KQogCQkJY2xlYW5fZGNhY2hlX2d1ZXN0X3BhZ2UocGZuLCBQQUdF X1NJWkUpOwogCiAJCWlmIChleGVjX2ZhdWx0KSB7CgoKVGhlIG1pc3NpbmcgbG9naWMgaXMgdGhh dCBhIHdyaXRlIGZyb20gdGhlIGd1ZXN0IGNvdWxkIGhhdmUgdHJpZ2dlcmVkCmEgQ29XLCBtZWFu aW5nIHdlIGRlZmluaXRlbHkgbmVlZCB0byBmbHVzaCBpdCBpbiB0aGF0IGNhc2UgdG9vLiBJdApm aXhlcyBhIGt2bS11bml0LXRlc3QgcmVncmVzc2lvbiBoZXJlLgoKVGhhbmtzLAoKCU0uCi0tIApK YXp6IGlzIG5vdCBkZWFkLiBJdCBqdXN0IHNtZWxscyBmdW5ueS4uLgpfX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwprdm1hcm0gbWFpbGluZyBsaXN0Cmt2bWFy bUBsaXN0cy5jcy5jb2x1bWJpYS5lZHUKaHR0cHM6Ly9saXN0cy5jcy5jb2x1bWJpYS5lZHUvbWFp bG1hbi9saXN0aW5mby9rdm1hcm0K