From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex =?utf-8?Q?Benn=C3=A9e?= Subject: Re: [PATCH] arm64: KVM: Fix user access for debug registers Date: Wed, 16 Sep 2015 15:42:45 +0100 Message-ID: <87vbbamnmi.fsf@linaro.org> References: <1442400070-23316-1-git-send-email-marc.zyngier@arm.com> 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 1982A41294 for ; Wed, 16 Sep 2015 10:41:50 -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 s1tmsHuCn6Vf for ; Wed, 16 Sep 2015 10:41:49 -0400 (EDT) Received: from mail-wi0-f177.google.com (mail-wi0-f177.google.com [209.85.212.177]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id F21DB41289 for ; Wed, 16 Sep 2015 10:41:48 -0400 (EDT) Received: by wiclk2 with SMTP id lk2so76740591wic.0 for ; Wed, 16 Sep 2015 07:42:47 -0700 (PDT) In-reply-to: <1442400070-23316-1-git-send-email-marc.zyngier@arm.com> 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: Marc Zyngier Cc: kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org List-Id: kvmarm@lists.cs.columbia.edu Ck1hcmMgWnluZ2llciA8bWFyYy56eW5naWVyQGFybS5jb20+IHdyaXRlczoKCj4gV2hlbiBzZXR0 aW5nIHRoZSBkZWJ1ZyByZWdpc3RlciBmcm9tIHVzZXJzcGFjZSwgbWFrZSBzdXJlIHRoYXQKPiBj b3B5X2Zyb21fdXNlcigpIGlzIGNhbGxlZCB3aXRoIGl0cyBwYXJhbWV0ZXJzIGluIHRoZSBleHBl Y3RlZAo+IG9yZGVyLiBJdCBvdGhlcndpc2UgZG9lc24ndCBkbyB3aGF0IHlvdSB0aGluay4KCk9v cHMuIFdlbGwgdGhhdCBleHBvc2VzIGEgYmlnIGhvbGUgaW4gbXkgdGVzdGluZy4gV2hpbGUgSSB0 ZXN0ZWQKZGVidWdnaW5nIGluc2lkZSB0aGUgZ3Vlc3Qgd29ya2VkIGJlZm9yZSBhbmQgYWZ0ZXIg YmVpbmcgZ3Vlc3QgZGVidWdnZWQKSSB0aGluayBHREJzIHRlbmRlbmN5IHRvIHJlbG9hZCBhbGwg dGhlIGRlYnVnIHJlZ2lzdGVycyBiZXR3ZWVuIGVhY2gKc3RlcCBtYXkgaGF2ZSBtYXNrZWQgdGhp cy4KCkRlYnVnZ2luZyBHREIgaW4gYWN0aW9uIG9yIHNvbWUgc29ydCBvZiBtaWdyYXRpb24gZXZl bnQgd291bGQgb2YgY291cnNlCnNjcmV3IHRoaXMgdXAgYnV0IEknbSBhZnJhaWQgbXkgdGVzdGlu ZyB3YXNuJ3QgZXZpbCBlbm91Z2guCgpBbnl3YXkgaGF2ZSBhOgoKUmV2aWV3ZWQtYnk6IEFsZXgg QmVubsOpZSA8YWxleC5iZW5uZWVAbGluYXJvLm9yZz4KCj4KPiBSZXBvcnRlZC1ieTogUGV0ZXIg TWF5ZGVsbCA8cGV0ZXIubWF5ZGVsbEBsaW5hcm8ub3JnPgo+IENjOiBBbGV4IEJlbm7DqWUgPGFs ZXguYmVubmVlQGxpbmFyby5vcmc+Cj4gRml4ZXM6IDg0ZTY5MGJmYmVkMSAoIktWTTogYXJtNjQ6 IGludHJvZHVjZSB2Y3B1LT5hcmNoLmRlYnVnX3B0ciIpCj4gU2lnbmVkLW9mZi1ieTogTWFyYyBa eW5naWVyIDxtYXJjLnp5bmdpZXJAYXJtLmNvbT4KPiAtLS0KPiAgYXJjaC9hcm02NC9rdm0vc3lz X3JlZ3MuYyB8IDggKysrKy0tLS0KPiAgMSBmaWxlIGNoYW5nZWQsIDQgaW5zZXJ0aW9ucygrKSwg NCBkZWxldGlvbnMoLSkKPgo+IGRpZmYgLS1naXQgYS9hcmNoL2FybTY0L2t2bS9zeXNfcmVncy5j IGIvYXJjaC9hcm02NC9rdm0vc3lzX3JlZ3MuYwo+IGluZGV4IGI0MTYwN2QuLjFkMDQ2M2UgMTAw NjQ0Cj4gLS0tIGEvYXJjaC9hcm02NC9rdm0vc3lzX3JlZ3MuYwo+ICsrKyBiL2FyY2gvYXJtNjQv a3ZtL3N5c19yZWdzLmMKPiBAQCAtMjcyLDcgKzI3Miw3IEBAIHN0YXRpYyBpbnQgc2V0X2J2cihz dHJ1Y3Qga3ZtX3ZjcHUgKnZjcHUsIGNvbnN0IHN0cnVjdCBzeXNfcmVnX2Rlc2MgKnJkLAo+ICB7 Cj4gIAlfX3U2NCAqciA9ICZ2Y3B1LT5hcmNoLnZjcHVfZGVidWdfc3RhdGUuZGJnX2J2cltyZC0+ cmVnXTsKPiAgCj4gLQlpZiAoY29weV9mcm9tX3VzZXIodWFkZHIsIHIsIEtWTV9SRUdfU0laRShy ZWctPmlkKSkgIT0gMCkKPiArCWlmIChjb3B5X2Zyb21fdXNlcihyLCB1YWRkciwgS1ZNX1JFR19T SVpFKHJlZy0+aWQpKSAhPSAwKQo+ICAJCXJldHVybiAtRUZBVUxUOwo+ICAJcmV0dXJuIDA7Cj4g IH0KPiBAQCAtMzE0LDcgKzMxNCw3IEBAIHN0YXRpYyBpbnQgc2V0X2JjcihzdHJ1Y3Qga3ZtX3Zj cHUgKnZjcHUsIGNvbnN0IHN0cnVjdCBzeXNfcmVnX2Rlc2MgKnJkLAo+ICB7Cj4gIAlfX3U2NCAq ciA9ICZ2Y3B1LT5hcmNoLnZjcHVfZGVidWdfc3RhdGUuZGJnX2JjcltyZC0+cmVnXTsKPiAgCj4g LQlpZiAoY29weV9mcm9tX3VzZXIodWFkZHIsIHIsIEtWTV9SRUdfU0laRShyZWctPmlkKSkgIT0g MCkKPiArCWlmIChjb3B5X2Zyb21fdXNlcihyLCB1YWRkciwgS1ZNX1JFR19TSVpFKHJlZy0+aWQp KSAhPSAwKQo+ICAJCXJldHVybiAtRUZBVUxUOwo+ICAKPiAgCXJldHVybiAwOwo+IEBAIC0zNTgs NyArMzU4LDcgQEAgc3RhdGljIGludCBzZXRfd3ZyKHN0cnVjdCBrdm1fdmNwdSAqdmNwdSwgY29u c3Qgc3RydWN0IHN5c19yZWdfZGVzYyAqcmQsCj4gIHsKPiAgCV9fdTY0ICpyID0gJnZjcHUtPmFy Y2gudmNwdV9kZWJ1Z19zdGF0ZS5kYmdfd3ZyW3JkLT5yZWddOwo+ICAKPiAtCWlmIChjb3B5X2Zy b21fdXNlcih1YWRkciwgciwgS1ZNX1JFR19TSVpFKHJlZy0+aWQpKSAhPSAwKQo+ICsJaWYgKGNv cHlfZnJvbV91c2VyKHIsIHVhZGRyLCBLVk1fUkVHX1NJWkUocmVnLT5pZCkpICE9IDApCj4gIAkJ cmV0dXJuIC1FRkFVTFQ7Cj4gIAlyZXR1cm4gMDsKPiAgfQo+IEBAIC00MDAsNyArNDAwLDcgQEAg c3RhdGljIGludCBzZXRfd2NyKHN0cnVjdCBrdm1fdmNwdSAqdmNwdSwgY29uc3Qgc3RydWN0IHN5 c19yZWdfZGVzYyAqcmQsCj4gIHsKPiAgCV9fdTY0ICpyID0gJnZjcHUtPmFyY2gudmNwdV9kZWJ1 Z19zdGF0ZS5kYmdfd2NyW3JkLT5yZWddOwo+ICAKPiAtCWlmIChjb3B5X2Zyb21fdXNlcih1YWRk ciwgciwgS1ZNX1JFR19TSVpFKHJlZy0+aWQpKSAhPSAwKQo+ICsJaWYgKGNvcHlfZnJvbV91c2Vy KHIsIHVhZGRyLCBLVk1fUkVHX1NJWkUocmVnLT5pZCkpICE9IDApCj4gIAkJcmV0dXJuIC1FRkFV TFQ7Cj4gIAlyZXR1cm4gMDsKPiAgfQoKLS0gCkFsZXggQmVubsOpZQpfX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwprdm1hcm0gbWFpbGluZyBsaXN0Cmt2bWFy bUBsaXN0cy5jcy5jb2x1bWJpYS5lZHUKaHR0cHM6Ly9saXN0cy5jcy5jb2x1bWJpYS5lZHUvbWFp bG1hbi9saXN0aW5mby9rdm1hcm0K