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Tue, 17 Nov 2020 09:59:32 +0000 (UTC) Received: from [10.36.113.230] (ovpn-113-230.ams2.redhat.com [10.36.113.230]) by smtp.corp.redhat.com (Postfix) with ESMTPS id B5A335D9CC; Tue, 17 Nov 2020 09:59:29 +0000 (UTC) Subject: Re: [PATCH 1/2] KVM: arm64: vgic: Forbid invalid userspace Redistributor accesses To: Marc Zyngier , Zenghui Yu References: <20201113142801.1659-1-yuzenghui@huawei.com> <20201113142801.1659-2-yuzenghui@huawei.com> <724c43702b52aac0d3c9beb9604d1bfb@kernel.org> <584b7ff1-ecf2-b0ec-cea3-ccc29902f43a@huawei.com> <7e58200c-814e-3598-155a-9a7e6cc24374@huawei.com> From: Auger Eric Message-ID: <5ba4a98e-276b-2462-0580-fe0e007e9b38@redhat.com> Date: Tue, 17 Nov 2020 10:59:27 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Cc: linux-kernel@vger.kernel.org, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu SGkgTWFyYywKCk9uIDExLzE3LzIwIDk6NDkgQU0sIE1hcmMgWnluZ2llciB3cm90ZToKPiBIaSBa ZW5naHVpLAo+IAo+IE9uIDIwMjAtMTEtMTYgMTQ6NTcsIFplbmdodWkgWXUgd3JvdGU6Cj4+IEhp IE1hcmMsCj4+Cj4+IE9uIDIwMjAvMTEvMTYgMjI6MTAsIE1hcmMgWnluZ2llciB3cm90ZToKPj4+ PiBNeSB0YWtlIGlzIHRoYXQgb25seSBpZiB0aGUgIltSZV1EaXN0cmlidXRvciBiYXNlIGFkZHJl c3MiIGlzIHNwZWNpZmllZAo+Pj4+IGluIHRoZSBzeXN0ZW0gbWVtb3J5IG1hcCwgd2lsbCB0aGUg dXNlci1wcm92aWRlZCBrdm1fZGV2aWNlX2F0dHIub2Zmc2V0Cj4+Pj4gbWFrZSBzZW5zZS4gQW5k IHdlIGNhbiB0aGVuIGhhbmRsZSB0aGUgYWNjZXNzIHRvIHRoZSByZWdpc3RlciB3aGljaCBpcwo+ Pj4+IGRlZmluZWQgYnkgImJhc2UgYWRkcmVzcyArIG9mZnNldCIuCj4+Pgo+Pj4gSSdkIHRlbmQg dG8gYWdyZWUsIGJ1dCBpdCBpcyBqdXN0IHRoYXQgdGhpcyBpcyBhIGxhcmdlIGNoYW5nZSBhdCAt cmM0Lgo+Pj4gSSdkIHJhdGhlciBoYXZlIGEgcXVpY2sgZml4IGZvciA1LjEwLCBhbmQgYSBtb3Jl IGludmFzaXZlIGNoYW5nZSBmb3IKPj4+IDUuMTEsCj4+PiBzcGFubmluZyBhbGwgdGhlIHBvc3Np YmxlIHZnaWMgZGV2aWNlcy4KPj4KPj4gU28geW91IHByZWZlciBmaXhpbmcgaXQgYnkgInJldHVy biBhIHZhbHVlIHRoYXQgZG9lc24ndCBoYXZlIHRoZSBMYXN0Cj4+IGJpdCBzZXQiIGZvciB2NS4x MD8gSSdtIG9rIHdpdGggaXQgYW5kIGNhbiBzZW5kIHYyIGZvciBpdC4KPiAKPiBDb29sLiBUaGFu a3MgZm9yIHRoYXQuCj4gCj4+IEJ0dywgbG9va2luZyBhZ2FpbiBhdCB0aGUgd2F5IHdlIGhhbmRs ZSB0aGUgdXNlci1yZWFkaW5nIG9mIEdJQ1JfVFlQRVIKPj4KPj4gwqDCoMKgwqB2Z2ljX21taW9f cmVhZF92M3JfdHlwZXIodmNwdSwgYWRkciwgbGVuKQo+Pgo+PiBpdCBzZWVtcyB0aGF0IEBhZGRy IGlzIGFjdHVhbGx5IHRoZSAqb2Zmc2V0KiBvZiBHSUNSX1RZUEVSICgweDAwMDgpIGFuZAo+PiBA YWRkciBpcyB1bmxpa2VseSB0byBiZSBlcXVhbCB0byBsYXN0X3JkaXN0X3R5cGVyLCB3aGljaCBp cyB0aGUgKkdQQSogb2YKPj4gdGhlIGxhc3QgUkQuIExvb2tzIGxpa2UgdGhlIHVzZXItcmVhZGlu ZyBvZiBHSUNSX1RZUEVSLkxhc3QgaXMgYWx3YXlzCj4+IGJyb2tlbj8KPiAKPiBJIHRoaW5rIHlv dSBhcmUgcmlnaHQuIFNvbWVob3csIHdlIGRvbid0IHNlZW0gdG8gdHJhY2sgdGhlIGluZGV4IG9m Cj4gdGhlIFJEIGluIHRoZSByZWdpb24sIHNvIHdlIGNhbiBuZXZlciBjb21wdXRlIHRoZSBhZGRy ZXNzIG9mIHRoZSBSRAo+IGV2ZW4gaWYgdGhlIGJhc2UgYWRkcmVzcyBpcyBzZXQuCj4gCj4gTGV0 J3MgZHJvcCB0aGUgcmVwb3J0aW5nIG9mIExhc3QgZm9yIHVzZXJzcGFjZSBmb3Igbm93LCBhcyBp dCBuZXZlcgo+IHdvcmtlZC4gSWYgeW91IHBvc3QgYSBwYXRjaCBhZGRyZXNzaW5nIHRoYXQgcXVp Y2tseSwgSSdsbCBnZXQgaXQgdG8KPiBQYW9sbyBieSB0aGUgZW5kIG9mIHRoZSB3ZWVrICh0aGVy ZSdzIGFub3RoZXIgZml4IHRoYXQgbmVlZHMgbWVyZ2luZykuCj4gCj4gRXJpYzogZG8gd2UgaGF2 ZSBhbnkgdGVzdCBjb3ZlcmluZyB0aGUgdXNlcnNwYWNlIEFQST8KClNvIGFzIHRoaXMgaXNzdWUg c2VlbXMgcmVsYXRlZCB0byB0aGUgY2hhbmdlcyBtYWRlIHdoZW4gaW1wbGVtZW50aW5nIHRoZQpt dWx0aXBsZSBSRElTVCByZWdpb25zLCBJIHZvbHVudGVlciB0byB3cml0ZSB0aG9zZSBLVk0gc2Vs ZnRlc3RzIDotKQoKVGhhbmtzCgpFcmljCgo+IAo+IFRoYW5rcywKPiAKPiDCoMKgwqDCoMKgwqDC oCBNLgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18Ka3Zt YXJtIG1haWxpbmcgbGlzdAprdm1hcm1AbGlzdHMuY3MuY29sdW1iaWEuZWR1Cmh0dHBzOi8vbGlz dHMuY3MuY29sdW1iaWEuZWR1L21haWxtYW4vbGlzdGluZm8va3ZtYXJtCg==