From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8C4C0C5475B for ; Fri, 1 Mar 2024 16:06:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=IAJo+X7IR9o39Sc7IMm5nGfNUmtEL7rOc4wS+eAJ4AY=; b=VdKwUJQlkqigCg Nc9U3Aa9tdq0GWizM0akGhqV2CESuOwGX9bbRGpE3xfpVROvMk8Et8zfzqtu/+12vgeK9fu2hvfjF BdJpNCpYBW4xzWUIMWxexZGHugEHyx7CsAUZl1dXFoW1Dz+CjXWBOkkgHTBsim0WL3XSD0ai4377P L+S3DLJX6m2ZX/iGA+EGCbLYJZy/LaLOeX68t8Wv0Z/tO3x3eJFoLWoFdcK90/41N91IUH08w6wIx gqPpbbLNdBWT2EvvCnHPyv23qQPXX0QFY8cv96mWHaXMAUjjkxB8y/0CsxuBJRX7+f1WpbZpR44gr xpAk1/WAuUKSr3jwn7GQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rg5On-000000011K7-2MFT; Fri, 01 Mar 2024 16:06:13 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rg5Oj-000000011Ga-2ZPh for linux-arm-kernel@lists.infradead.org; Fri, 01 Mar 2024 16:06:11 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 193491FB; Fri, 1 Mar 2024 08:06:43 -0800 (PST) Received: from FVFF77S0Q05N (unknown [10.57.66.115]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id BAD6A3F73F; Fri, 1 Mar 2024 08:06:01 -0800 (PST) Date: Fri, 1 Mar 2024 16:05:52 +0000 From: Mark Rutland To: Doug Anderson Cc: Catalin Marinas , Will Deacon , Marc Zyngier , Misono Tomohiro , Chen-Yu Tsai , Stephen Boyd , Daniel Thompson , Sumit Garg , Frederic Weisbecker , "Guilherme G. Piccoli" , Josh Poimboeuf , Kees Cook , Peter Zijlstra , Thomas Gleixner , Tony Luck , Valentin Schneider , linux-arm-kernel@lists.infradead.org, linux-hardening@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] arm64: smp: smp_send_stop() and crash_smp_send_stop() should try non-NMI first Message-ID: References: <20231207170251.1.Id4817adef610302554b8aa42b090d57270dc119c@changeid> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240301_080609_745215_9DC5843B X-CRM114-Status: GOOD ( 26.64 ) 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 SGkgRG91ZywKCk9uIFR1ZSwgRmViIDI3LCAyMDI0IGF0IDA0OjU3OjMxUE0gLTA4MDAsIERvdWcg QW5kZXJzb24gd3JvdGU6Cj4gT24gTW9uLCBKYW4gOCwgMjAyNCBhdCA0OjU04oCvUE0gRG91ZyBB bmRlcnNvbiA8ZGlhbmRlcnNAY2hyb21pdW0ub3JnPiB3cm90ZToKPiA+IE9uIFRodSwgRGVjIDcs IDIwMjMgYXQgNTowM+KAr1BNIERvdWdsYXMgQW5kZXJzb24gPGRpYW5kZXJzQGNocm9taXVtLm9y Zz4gd3JvdGU6Cgo+ID4gVGhlIHNvdW5kIG9mIGNyaWNrZXRzIGlzIG92ZXJ3aGVsbWluZy4gOy0p IERvZXMgYW55b25lIGhhdmUgYW55Cj4gPiBjb21tZW50cyBoZXJlPyBJcyB0aGlzIGEgdGVycmli bGUgaWRlYT8gSXMgdGhpcyB0aGUgYmVzdCBpZGVhIHlvdSd2ZQo+ID4gaGVhcmQgYWxsIHllYXIg KGl0J3Mgb25seSBiZWVuIDggZGF5cywgc28gbWF5YmUpPyBJcyB0aGlzIGdyZWF0IGJ1dAo+ID4g dGhlIGltcGxlbWVudGF0aW9uIGlzIGxhY2tpbmcgKGF0IGJlc3QpPyBEbyB5b3UgaGF0ZSB0aGF0 IHRoaXMgd2FpdHMKPiA+IGZvciAxIHNlY29uZCBhbmQgd2lzaCBpdCB3YWl0ZWQgZm9yIDEgbXM/ IDEwIG1zPyAxMDAgbXM/IDgxOTIgbXM/Cj4gPgo+ID4gQXNpZGUgZnJvbSB0aGUgd2VpcmRuZXNz IG9mIGEgcHJvY2Vzc29yIGJlaW5nIGtpbGxlZCB3aGlsZSBob2xkaW5nIHRoZQo+ID4gY29uc29s ZSBsb2NrLCBpdCBkb2VzIHNlZW0gYmVuZWZpY2lhbCB0byBnaXZlIElSUXMgYXQgbGVhc3QgYSBs aXR0bGUKPiA+IHRpbWUgdG8gZmluaXNoIGJlZm9yZSBraWxsaW5nIGEgcHJvY2Vzc29yLiBJIGRv bid0IGhhdmUgYW55IG90aGVyCj4gPiBleHBsaWNpdCBleGFtcGxlcywgYnV0IEkgY291bGQganVz dCBpbWFnaW5lIHRoYXQgdGhpbmdzIG1pZ2h0IGJlIGEKPiA+IGxpdHRsZSBtb3JlIG9yZGVybHkg aW4gc3VjaCBhIGNhc2UuLi4KPiAKPiBJJ20gc3RpbGwgaG9waW5nIHRvIGdldCBzb21lIHNvcnQg b2YgZmVlZGJhY2sgaGVyZS4gSWYgcGVvcGxlIHRoaW5rCj4gdGhpcyBpcyBhIHRlcnJpYmxlIGlk ZWEgdGhlbiBJJ2xsIHNodXQgdXAgbm93IGFuZCBsZWF2ZSB3ZWxsIGVub3VnaAo+IGFsb25lLCBi dXQgaXQgd291bGQgYmUgbmljZSB0byBhY3RpdmVseSBkZWNpZGUgYW5kIGdldCB0aGUgcGF0Y2gg b3V0Cj4gb2YgbGltYm8uCj4gCj4gRldJVyB0aGUgc2VyaWFsIGNvbnNvbGUgZHVtcGluZyBpc3N1 ZSB0aGF0IG9yaWdpbmFsbHkgaW5zcGlyZWQgbWUgdG8KPiB0cmFjayB0aGlzIGRvd24gaGFzIGJl ZW4gd29ya2VkIGFyb3VuZCBhdCBsZWFzdCB3ZWxsIGVub3VnaCB0byBub3QKPiBzcGV3IGdhcmJh Z2UgaW4gbXkgY29uc29sZS4gU2VlIGNvbW1pdCA5ZTk1N2ExNTUwMDUgKCJzZXJpYWw6Cj4gcWNv bS1nZW5pOiBEb24ndCBjYW5jZWwvYWJvcnQgaWYgd2UgY2FuJ3QgZ2V0IHRoZSBwb3J0IGxvY2si KS4gSXQncwo+IHN0aWxsIGEgbGl0dGxlIGF3a3dhcmQgYmVjYXVzZSB3ZSdsbCBiZSBydW5uaW5n IGZ1bGx5IGxvY2tsZXNzIGR1cmluZwo+IHBhbmljIHRpbWUsIGJ1dCBpdCBzZWVtcyB0byB3b3Jr Li4uCgpUaGlzIGlzIG9uIG15IGxpc3Qgb2YgdGhpbmdzIHRvIGxvb2sgaW50bywgYnV0IEkgaGF2 ZW4ndCBoYWQgdGhlIGNoYW5jZSB0byBnbwp0aHJvdWdoIGl0IGluIGRldGFpbC4KCkZyb20gYSBo aWdoIGxldmVsLCBJIHRoaW5rIHRoaXMgc291bmRzIHJlYXNvbmFibGU7IEkganVzdCB3YW50IHRv IG1ha2Ugc3VyZQp0aGlzIGRvZXNuJ3QgbGVhZCB0byBhbnkgbmV3IHN1cnByaXNlcy4uLgoKTWFy ay4KCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxpbnV4 LWFybS1rZXJuZWwgbWFpbGluZyBsaXN0CmxpbnV4LWFybS1rZXJuZWxAbGlzdHMuaW5mcmFkZWFk Lm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LWFy bS1rZXJuZWwK