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Fri, 20 Mar 2020 09:46:41 +0000 MIME-Version: 1.0 Date: Fri, 20 Mar 2020 09:46:41 +0000 From: Marc Zyngier To: Auger Eric Subject: Re: [PATCH v5 20/23] KVM: arm64: GICv4.1: Plumb SGI implementation selection in the distributor In-Reply-To: References: <20200304203330.4967-1-maz@kernel.org> <20200304203330.4967-21-maz@kernel.org> <72832f51-bbde-8502-3e03-189ac20a0143@huawei.com> <4a06fae9c93e10351276d173747d17f4@kernel.org> <49995ec9-3970-1f62-5dfc-118563ca00fc@redhat.com> Message-ID: X-Sender: maz@kernel.org User-Agent: Roundcube Webmail/1.3.10 X-SA-Exim-Connect-IP: 51.254.78.96 X-SA-Exim-Rcpt-To: eric.auger@redhat.com, yuzenghui@huawei.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, lorenzo.pieralisi@arm.com, jason@lakedaemon.net, rrichter@marvell.com, tglx@linutronix.de, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Cc: Lorenzo Pieralisi , Jason Cooper , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Robert Richter , Thomas Gleixner , 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-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 T24gMjAyMC0wMy0yMCAwNzo1OSwgQXVnZXIgRXJpYyB3cm90ZToKPiBIaSBaZW5naHVpLAo+IAo+ IE9uIDMvMjAvMjAgNDowOCBBTSwgWmVuZ2h1aSBZdSB3cm90ZToKPj4gT24gMjAyMC8zLzIwIDQ6 MzgsIEF1Z2VyIEVyaWMgd3JvdGU6Cj4+PiBIaSBNYXJjLAo+Pj4gT24gMy8xOS8yMCAxOjEwIFBN LCBNYXJjIFp5bmdpZXIgd3JvdGU6Cj4+Pj4gSGkgWmVuZ2h1aSwKPj4+PiAKPj4+PiBPbiAyMDIw LTAzLTE4IDA2OjM0LCBaZW5naHVpIFl1IHdyb3RlOgo+Pj4+PiBIaSBNYXJjLAo+Pj4+PiAKPj4+ Pj4gT24gMjAyMC8zLzUgNDozMywgTWFyYyBaeW5naWVyIHdyb3RlOgo+Pj4+Pj4gVGhlIEdJQ3Y0 LjEgYXJjaGl0ZWN0dXJlIGdpdmVzIHRoZSBoeXBlcnZpc29yIHRoZSBvcHRpb24gdG8gbGV0Cj4+ Pj4+PiB0aGUgZ3Vlc3QgY2hvb3NlIHdoZXRoZXIgaXQgd2FudHMgdGhlIGdvb2Qgb2xkIFNHSXMg d2l0aCBhbgo+Pj4+Pj4gYWN0aXZlIHN0YXRlLCBvciB0aGUgbmV3LCBIVy1iYXNlZCBvbmVzIHRo YXQgZG8gbm90IGhhdmUgb25lLgo+Pj4+Pj4gCj4+Pj4+PiBGb3IgdGhpcywgcGx1bWIgdGhlIGNv bmZpZ3VyYXRpb24gb2YgU0dJcyBpbnRvIHRoZSBHSUN2MyBNTUlPCj4+Pj4+PiBoYW5kbGluZywg cHJlc2VudCB0aGUgR0lDRF9UWVBFUjIubkFTU0dJY2FwIHRvIHRoZSBndWVzdCwKPj4+Pj4+IGFu ZCBoYW5kbGUgdGhlIEdJQ0RfQ1RMUi5uQVNTR0lyZXEgc2V0dGluZy4KPj4+Pj4+IAo+Pj4+Pj4g SW4gb3JkZXIgdG8gYmUgYWJsZSB0byBkZWFsIHdpdGggdGhlIHJlc3RvcmUgb2YgYSBndWVzdCwg YWxzbwo+Pj4+Pj4gYXBwbHkgdGhlIEdJQ0RfQ1RMUi5uQVNTR0lyZXEgc2V0dGluZyBhdCBmaXJz dCBydW4gc28gdGhhdCB3ZQo+Pj4+Pj4gY2FuIG1vdmUgdGhlIHJlc3RvcmVkIFNHSXMgdG8gdGhl IEhXIGlmIHRoYXQncyB3aGF0IHRoZSBndWVzdAo+Pj4+Pj4gaGFkIHNlbGVjdGVkIGluIGEgcHJl dmlvdXMgbGlmZS4KPj4+Pj4gCj4+Pj4+IEknbSBva2F5IHdpdGggdGhlIHJlc3RvcmUgcGF0aC7C oCBCdXQgaXQgc2VlbXMgdGhhdCB3ZSBzdGlsbCBmYWlsIHRvCj4+Pj4+IHNhdmUgdGhlIHBlbmRp bmcgc3RhdGUgb2YgdlNHSSAtIHNvZnR3YXJlIHBlbmRpbmdfbGF0Y2ggb2YgSFctYmFzZWQKPj4+ Pj4gdlNHSXMgd2lsbCBub3QgYmUgdXBkYXRlZCAoYW5kIGFsd2F5cyBiZSBmYWxzZSkgYmVjYXVz ZSB3ZSBkaXJlY3RseQo+Pj4+PiBpbmplY3QgdGhlbSB0aHJvdWdoIElUUywgc28gdmdpY192M191 YWNjZXNzX3JlYWRfcGVuZGluZygpIGNhbid0Cj4+Pj4+IHRlbGwgdGhlIGNvcnJlY3QgcGVuZGlu ZyBzdGF0ZSB0byB1c2VyLXNwYWNlICh0aGUgY29ycmVjdCBvbmUgCj4+Pj4+IHNob3VsZAo+Pj4+ PiBiZSBsYXRjaGVkIGluIEhXKS4KPj4+Pj4gCj4+Pj4+IEl0IHdvdWxkIGJlIGdvb2QgaWYgd2Ug Y2FuIHN5bmMgdGhlIGhhcmR3YXJlIHN0YXRlIGludG8gCj4+Pj4+IHBlbmRpbmdfbGF0Y2gKPj4+ Pj4gYXQgYW4gYXBwcm9wcmlhdGUgdGltZSAoanVzdCBiZWZvcmUgc2F2ZSksIGJ1dCBub3Qgc3Vy ZSBpZiB3ZSAKPj4+Pj4gY2FuLi4uCj4+Pj4gCj4+Pj4gVGhlIHByb2JsZW0gaXMgdG8gZmluZCB0 aGUgImFwcHJvcHJpYXRlIHRpbWUiLiBJdCB3b3VsZCByZXF1aXJlIHRvCj4+Pj4gZGVmaW5lCj4+ Pj4gYSBwb2ludCBpbiB0aGUgc2F2ZSBzZXF1ZW5jZSB3aGVyZSB3ZSB0cmFuc2l0aW9uIHRoZSBz dGF0ZSBmcm9tIEhXIAo+Pj4+IHRvCj4+Pj4gU1cuIEknbSBub3Qga2VlbiBvbiBhZGRpbmcgbW9y ZSBzdGF0ZSB0aGFuIHdlIGFscmVhZHkgaGF2ZS4KPj4+IAo+Pj4gbWF5IGJlIHdlIGNvdWxkIHVz ZSBhIGRlZGljYXRlZCBkZXZpY2UgZ3JvdXAvYXR0ciBhcyB3ZSBoYXZlIGZvciB0aGUgCj4+PiBJ VFMKPj4+IHNhdmUgdGFibGVzPyB0aGUgdXNlciBzcGFjZSB3b3VsZCBjaG9vc2UuCj4+IAo+PiBJ dCBtZWFucyB0aGF0IHVzZXJzcGFjZSB3aWxsIGJlIGF3YXJlIG9mIHNvbWUgZm9ybSBvZiBHSUN2 NC4xIGRldGFpbHMKPj4gKGUuZy4sIGdldC9zZXQgdlNHSSBzdGF0ZSBhdCBIVyBsZXZlbCkgdGhh dCBLVk0gaGFzIGltcGxlbWVudGVkLgo+PiBJcyBpdCBzb21ldGhpbmcgdGhhdCB1c2Vyc3BhY2Ug cmVxdWlyZWQgdG8ga25vdz8gSSdtIG9wZW4gdG8gdGhpcyA7LSkKPiBOb3Qgc3VyZSB3ZSB3b3Vs ZCBiZSBvYmxpZ2VkIHRvIGV4cG9zZSBmaW5lIGRldGFpbHMuIFRoaXMgY291bGQgYmUgYQo+IGdl bmVyaWMgc2F2ZS9yZXN0b3JlIGRldmljZSBncm91cC9hdHRyIHdob3NlIGltcGxlbWVudGF0aW9u IGF0IEtWTSAKPiBsZXZlbAo+IGNvdWxkIGRpZmZlciBkZXBlbmRpbmcgb24gdGhlIHZlcnNpb24g YmVpbmcgaW1wbGVtZW50ZWQsIG5vPwoKV2hhdCBwcmV2ZW50cyB1cyBmcm9tIGhvb2tpbmcgdGhp cyBzeW5jaHJvbml6YXRpb24gdG8gdGhlIGN1cnJlbnQgCmJlaGF2aW91cgpvZiBLVk1fREVWX0FS TV9WR0lDX1NBVkVfUEVORElOR19UQUJMRVM/IEFmdGVyIGFsbCwgdGhpcyBpcyBhbHJlYWR5IHRo ZSAKcG9pbnQKd2hlcmUgd2Ugc3luY2hyb25pemUgdGhlIEtWTSB2aWV3IG9mIHRoZSBwZW5kaW5n IHN0YXRlIHdpdGggdXNlcnNwYWNlLgpIZXJlLCBpdCdzIGp1c3QgYSBtYXR0ZXIgb2YgcGlja2lu ZyB0aGUgaW5mb3JtYXRpb24gZnJvbSBzb21lIG90aGVyIApwbGFjZQooaS5lLiB0aGUgaG9zdCdz IHZpcnR1YWwgcGVuZGluZyB0YWJsZSkuCgpUaGUgdGhpbmcgd2UgbmVlZCB0aG91Z2ggaXMgdGhl IGd1YXJhbnRlZSB0aGF0IHRoZSBndWVzdCBpc24ndCBnb2luZyB0bwpnZXQgbW9yZSB2TFBJcyBh dCB0aGF0IHN0YWdlLCBhcyB0aGV5IHdvdWxkIGJlIGxvc3QuIFRoaXMgZWZmZWN0aXZlbHkKYXNz dW1lcyB0aGF0IHdlIGNhbiBhbHNvIHNhdmUvcmVzdG9yZSB0aGUgc3RhdGUgb2YgdGhlIHNpZ25h bGxpbmcgCmRldmljZXMsCmFuZCBJIGRvbid0IGtub3cgaWYgd2UncmUgcXVpdGUgdGhlcmUgeWV0 LgoKVGhhbmtzLAoKICAgICAgICAgTS4KLS0gCkphenogaXMgbm90IGRlYWQuIEl0IGp1c3Qgc21l bGxzIGZ1bm55Li4uCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fCmt2bWFybSBtYWlsaW5nIGxpc3QKa3ZtYXJtQGxpc3RzLmNzLmNvbHVtYmlhLmVkdQpodHRw czovL2xpc3RzLmNzLmNvbHVtYmlhLmVkdS9tYWlsbWFuL2xpc3RpbmZvL2t2bWFybQo=