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Tue, 17 Nov 2020 21:09:13 +0800 (CST) Received: from [10.174.185.179] (10.174.185.179) by DGGEMS404-HUB.china.huawei.com (10.3.19.204) with Microsoft SMTP Server id 14.3.487.0; Tue, 17 Nov 2020 21:09:22 +0800 Subject: Re: [PATCH 1/2] KVM: arm64: vgic: Forbid invalid userspace Redistributor accesses To: Marc Zyngier 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: Zenghui Yu Message-ID: Date: Tue, 17 Nov 2020 21:09:21 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-Originating-IP: [10.174.185.179] X-CFilter-Loop: Reflected Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu 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-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu T24gMjAyMC8xMS8xNyAxNjo0OSwgTWFyYyBaeW5naWVyIHdyb3RlOgo+IEhpIFplbmdodWksCj4g Cj4gT24gMjAyMC0xMS0xNiAxNDo1NywgWmVuZ2h1aSBZdSB3cm90ZToKPj4gSGkgTWFyYywKPj4K Pj4gT24gMjAyMC8xMS8xNiAyMjoxMCwgTWFyYyBaeW5naWVyIHdyb3RlOgo+Pj4+IE15IHRha2Ug aXMgdGhhdCBvbmx5IGlmIHRoZSAiW1JlXURpc3RyaWJ1dG9yIGJhc2UgYWRkcmVzcyIgaXMgc3Bl Y2lmaWVkCj4+Pj4gaW4gdGhlIHN5c3RlbSBtZW1vcnkgbWFwLCB3aWxsIHRoZSB1c2VyLXByb3Zp ZGVkIGt2bV9kZXZpY2VfYXR0ci5vZmZzZXQKPj4+PiBtYWtlIHNlbnNlLiBBbmQgd2UgY2FuIHRo ZW4gaGFuZGxlIHRoZSBhY2Nlc3MgdG8gdGhlIHJlZ2lzdGVyIHdoaWNoIGlzCj4+Pj4gZGVmaW5l ZCBieSAiYmFzZSBhZGRyZXNzICsgb2Zmc2V0Ii4KPj4+Cj4+PiBJJ2QgdGVuZCB0byBhZ3JlZSwg YnV0IGl0IGlzIGp1c3QgdGhhdCB0aGlzIGlzIGEgbGFyZ2UgY2hhbmdlIGF0IC1yYzQuCj4+PiBJ J2QgcmF0aGVyIGhhdmUgYSBxdWljayBmaXggZm9yIDUuMTAsIGFuZCBhIG1vcmUgaW52YXNpdmUg Y2hhbmdlIGZvciAKPj4+IDUuMTEsCj4+PiBzcGFubmluZyBhbGwgdGhlIHBvc3NpYmxlIHZnaWMg ZGV2aWNlcy4KPj4KPj4gU28geW91IHByZWZlciBmaXhpbmcgaXQgYnkgInJldHVybiBhIHZhbHVl IHRoYXQgZG9lc24ndCBoYXZlIHRoZSBMYXN0Cj4+IGJpdCBzZXQiIGZvciB2NS4xMD8gSSdtIG9r IHdpdGggaXQgYW5kIGNhbiBzZW5kIHYyIGZvciBpdC4KPiAKPiBDb29sLiBUaGFua3MgZm9yIHRo YXQuCj4gCj4+IEJ0dywgbG9va2luZyBhZ2FpbiBhdCB0aGUgd2F5IHdlIGhhbmRsZSB0aGUgdXNl ci1yZWFkaW5nIG9mIEdJQ1JfVFlQRVIKPj4KPj4gwqDCoMKgwqB2Z2ljX21taW9fcmVhZF92M3Jf dHlwZXIodmNwdSwgYWRkciwgbGVuKQo+Pgo+PiBpdCBzZWVtcyB0aGF0IEBhZGRyIGlzIGFjdHVh bGx5IHRoZSAqb2Zmc2V0KiBvZiBHSUNSX1RZUEVSICgweDAwMDgpIGFuZAo+PiBAYWRkciBpcyB1 bmxpa2VseSB0byBiZSBlcXVhbCB0byBsYXN0X3JkaXN0X3R5cGVyLCB3aGljaCBpcyB0aGUgKkdQ QSogb2YKPj4gdGhlIGxhc3QgUkQuIExvb2tzIGxpa2UgdGhlIHVzZXItcmVhZGluZyBvZiBHSUNS X1RZUEVSLkxhc3QgaXMgYWx3YXlzCj4+IGJyb2tlbj8KPiAKPiBJIHRoaW5rIHlvdSBhcmUgcmln aHQuIFNvbWVob3csIHdlIGRvbid0IHNlZW0gdG8gdHJhY2sgdGhlIGluZGV4IG9mCj4gdGhlIFJE IGluIHRoZSByZWdpb24sIHNvIHdlIGNhbiBuZXZlciBjb21wdXRlIHRoZSBhZGRyZXNzIG9mIHRo ZSBSRAo+IGV2ZW4gaWYgdGhlIGJhc2UgYWRkcmVzcyBpcyBzZXQuCj4gCj4gTGV0J3MgZHJvcCB0 aGUgcmVwb3J0aW5nIG9mIExhc3QgZm9yIHVzZXJzcGFjZSBmb3Igbm93LCBhcyBpdCBuZXZlcgo+ IHdvcmtlZC4gSWYgeW91IHBvc3QgYSBwYXRjaCBhZGRyZXNzaW5nIHRoYXQgcXVpY2tseSwgSSds bCBnZXQgaXQgdG8KPiBQYW9sbyBieSB0aGUgZW5kIG9mIHRoZSB3ZWVrICh0aGVyZSdzIGFub3Ro ZXIgZml4IHRoYXQgbmVlZHMgbWVyZ2luZykuCgpPSy4gSSdsbCBmaXggaXQgYnkgcHJvdmlkaW5n IGEgdWFjY2Vzc19yZWFkIGNhbGxiYWNrIGZvciBHSUNSX1RZUEVSLgoKClRoYW5rcywKWmVuZ2h1 aQoKPiAKPiBFcmljOiBkbyB3ZSBoYXZlIGFueSB0ZXN0IGNvdmVyaW5nIHRoZSB1c2Vyc3BhY2Ug QVBJPwo+IAo+IFRoYW5rcywKPiAKPiAgwqDCoMKgwqDCoMKgwqAgTS4KX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18Ka3ZtYXJtIG1haWxpbmcgbGlzdAprdm1h cm1AbGlzdHMuY3MuY29sdW1iaWEuZWR1Cmh0dHBzOi8vbGlzdHMuY3MuY29sdW1iaWEuZWR1L21h aWxtYW4vbGlzdGluZm8va3ZtYXJtCg==