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Wed, 24 Jan 2024 12:43:50 +0000 Date: Wed, 24 Jan 2024 12:43:48 +0000 Message-ID: <86cytq9a0r.wl-maz@kernel.org> From: Marc Zyngier To: Kunkun Jiang Cc: Oliver Upton , James Morse , Suzuki K Poulose , Zenghui Yu , moderated for non-subscribers , , "wanghaibin.wang@huawei.com" Subject: Re: [bug report] GICv4.1: doorbell interrupts will be lost in a corner case In-Reply-To: <4edc4d02-5c0b-a2e5-897a-7e60fbb0f3e3@huawei.com> References: <4edc4d02-5c0b-a2e5-897a-7e60fbb0f3e3@huawei.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/29.1 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: jiangkunkun@huawei.com, oliver.upton@linux.dev, james.morse@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, wanghaibin.wang@huawei.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240124_044404_560212_A30622DB X-CRM114-Status: GOOD ( 18.57 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gV2VkLCAyNCBKYW4gMjAyNCAwODo1NDoyNCArMDAwMCwKS3Vua3VuIEppYW5nIDxqaWFuZ2t1 bmt1bkBodWF3ZWkuY29tPiB3cm90ZToKPiAKPiBIaSBhbGzvvIwKPiAKPiBJbiBjaGFwdGVyIDgu NSAoIkRvb3JiZWxscyIpIG9mIHRoZSBHSUMgc3BlYywgdGhlIGFmZmluaXR5IG9mCj4gZG9vcmJl bGwgaW50ZXJydXB0IGlzIGRlc2NyaWJlZCBsaWtlIHRoaXM6Cj4gCj4gPiBEb29yYmVsbCBpbnRl cnJ1cHRzIHRhcmdldCB0aGUgUmVkaXN0cmlidXRvciB0aGUgdlBFIGlzCj4gPiBjdXJyZW50bHkg bWFwcGVkIHRvLCBiYXNlZCBvbiB0aGUgcHJldmlvdXMgVk1BUFAgb3IgVk1PVlAKPiA+IGNvbW1h bmQgZm9yIHRoZSB2UEUuCj4gVGhlIGRvb3JiZWxsIGludGVycnVwdCBoZXJlIHNob3VsZCByZWZl ciB0byBhbGwgdHlwZXMgb2YKPiBkb29yYmVsbCBpbnRlcnJ1cHQsIHJpZ2h0PwoKVGhlcmUgaXMg b25seSBvbmUgdHlwZSBvZiBkb29yYmVsbC4KCj4gCj4gV2hlbiBHSUN2NC4xIGlzIGVuYWJsZWQs IHRoZSBkb29yYmVsbCBpbnRlcnJ1cHQgd2lsbCBiZQo+IHRydW5lZCBvbiBvbmx5IHdoZW4ga3Zt IGhhbmRsZXMgV0ZJIGV4aXQuIFRoZXJlIGlzIGEKPiBjb3JuZXIgY2FzZSB3aGVyZSB3aWxsIGxv c3QgZG9vcmJlbGwgaW50ZXJydXB0Ogo+IDEuIGRvb3JiZWxsIGludGVycnVwdCBlbmFibGVkCj4g Mi4gdGhlIGNwdSB3aGljaCB0aGUgdlBFIGlzIG1hcHBlZCB0byBpcyBtYW51YWxseSBvZmZsaW5l Cj4gwqAgdGhyb3VnaCAnZWNobyAwID4gL3N5cy9kZXZpY2Uvc3lzdGVtL2NwdS9jcHVYL29ubGlu ZScKPiAzLiBBY2NvcmRpbmcgdG8gdGhlIGRlc2NyaXB0aW9uIG9mIGNoYXB0ZXIgOC41ICgiRG9v cmJlbGxzIiksCj4gwqAgdGhlIGRvb3JiZWxsIGludGVycnVwdCBjb21pbmcgYXQgdGhpcyB0aW1l IHdpbGwgc3RpbGwKPiDCoCBiZSBzZW50IHRvIHRoZSBvZmZsaW5lIGNwdS5UaGVuIHRoZSBpbnRl cnJ1cHQgd2lsbCBiZQo+IMKgIGxvc3QuCj4gCj4gU2hvdWxkIHdlIGFkZCBhIGNwdSBvZmZsaW5l IGNhbGxiYWNrIHRvIGhhbmRsZSB0aGUKPiBkb29yYmVsbCBpbnRlcnJ1cHQgbWFwcGVkIHRvIHRo aXMgY3B1PwoKVGhhdCBzZWVtcyBncm9zcy4gVGhlIHJpZ2h0IHdheSB0byBkbyBpdCBpcyB0byB0 cmFjayB0aGUgYWZmaW5pdHkgb2YKdGhlIGRvb3JiZWxsICh3aGljaCB3ZSBhbHJlYWR5IGRvKSwg YW5kIGxldCB0aGUgY29yZSBjb2RlIG1vdmUgdGhlCmludGVycnVwdCBzb21ld2hlcmUgZWxzZSBp biB0aGlzIGNhc2UgKHdoaWNoIGlzIHNob3VsZCBhbHJlYWR5IGRvKS4KCkhhdmUgeW91IGFjdHVh bGx5IHdpdG5lc3NlZCB0aGlzIGlzc3VlPyBPciBpcyB0aGF0IGp1c3QgaWRsZQpjb25qZWN0dXJl PwoKCU0uCgotLSAKV2l0aG91dCBkZXZpYXRpb24gZnJvbSB0aGUgbm9ybSwgcHJvZ3Jlc3MgaXMg bm90IHBvc3NpYmxlLgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX18KbGludXgtYXJtLWtlcm5lbCBtYWlsaW5nIGxpc3QKbGludXgtYXJtLWtlcm5lbEBsaXN0 cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGlu Zm8vbGludXgtYXJtLWtlcm5lbAo=