From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=82.195.75.108 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793966036; b=Bsd6O7TsW/K2Z8E+9I5I25wx2xx7Rzu77yo59FoEr58fdW7ofVEmSLkEUdcefg0Cf23H QG7ht5ZAwyFcfuGSeZK0dQSFW6GAoprOCADcRDPsndoq1Rtzxi4nzY/fiCE4j5x7/Sv/A I2pvwrHqRNyihKpneHRmMPB9zqSFbBGtyZTXlyd4NvABwqsVg6mG9aFx05vpzZfA/QiNe D/2A6ed3bRp8kE85V44KNGTvSCVwWKA5PNQEVju91PY1YXyuGV/SvmkUMOe0hVHxEWLqo w8yhwnd2QLOy6BnWXmtc+fI/sSYDI2qJM3oJNk9bwKlNTd+e25a9gXYpcpyRNiIDNLA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793966036; h=DMARC-Filter:DKIM-Signature:Received:Date:From:To:Cc:Subject: Message-ID:References:MIME-Version:Content-Type:Content-Disposition: In-Reply-To:X-Debian-User; bh=L2x+FqwNN2SjKcTzPIIXmSlScBdMJ5xQvJIpzaDWbMI=; b=yHlZlFIE+MtX94Xs4MiEnbhrqz6VhhKfeLY6CTTDn5bs4W5sQ3VHpqXJC2XAYFgxO5gV i/MUGsZ5cUdbd8YmUVgf7NSk5iDA8HlcXAMozoNu04lswjPbZjADD/UF/ngenHbfqRMGP qTH/zGFruVVTqvX5gxYQPsoTv3mFRsFms4gtWESpvU0j43c4VmwRuDri0wyUoAjSE8y2z PBldQwqBD/IqaunYpcs/rLe9ZXNG0S49LOTCtSjpdxVw+cq9mmfi037nR1nV00pa0QheX +rYvcsvWbVwCWQGtOxYEtfucUogsQJpej9Dyk1X3EA0Tas8cQynDKEc+Yhfc+NfoTqQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=debian.org; spf=pass smtp.mailfrom=debian.org; dkim=pass header.d=debian.org header.i=@debian.org header.a=rsa-sha256 header.s=smtpauto.stravinsky header.b=AwukKVVr; arc=none smtp.remote-ip=82.195.75.108 Received: from stravinsky.debian.org (stravinsky.debian.org [82.195.75.108]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (prime256v1) server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 39F50606A336; Fri, 6 Nov 2026 11:53:56 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 39F50606A336 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=debian.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=debian.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=debian.org header.i=@debian.org header.a=rsa-sha256 header.s=smtpauto.stravinsky header.b=AwukKVVr DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=debian.org; s=smtpauto.stravinsky; h=X-Debian-User:In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=L2x+FqwNN2SjKcTzPIIXmSlScBdMJ5xQvJIpzaDWbMI=; b=AwukKVVr54QxOzzZVEdehAsFBE 6MnontVg6GSYdkC22unJinnfGQ56l6xMbjwVpJCbWVfEkB8pbWdbkZChK7Whp1NJXMqrUWr+pRLOD dXlapB1c+oZaT6eFow5GN+K0WzGA2jmOUylhnA+2PL3phwI0oiZxvEpaguNb8SxCg4EMZjd45grKM d32HPtAWx4hxKP4mVjDhOQAPGWFtIAZqwli7NNi8kfKPQ5VT0RDHiWKwBu5cNaBAtEkUt1d4Y0H7e wHOnJ5cthoRLrrvIrr2BB69SV24mmWtM+8CF1DbmL5eeR9wUFB6MnrVRoBvTIHWWxqSOTa3K4fAYw 7snhfS6w==; Received: from authenticated-user by stravinsky.debian.org with esmtpsa (TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.96) (envelope-from ) id 1xPIVK-009GNp-3B; Fri, 06 Nov 2026 11:53:11 +0000 Date: Fri, 6 Nov 2026 03:53:04 -0800 From: Breno Leitao To: Kiryl Shutsemau Cc: Catalin Marinas , Will Deacon , Mark Rutland , James Morse , Usama Arif , Marc Zyngier , Doug Anderson , Jinjie Ruan , Ada Couprie Diaz , Vladimir Murzin , Linus Walleij , Peter Zijlstra , Thomas Huth , Dawei Li , mrigendrachaubey , kernel-team@meta.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH v2 2/2] arm64: sdei: Preserve the interrupted context's exception registers Message-ID: References: <20261105120835.3321912-1-kirill@shutemov.name> <20261105120835.3321912-3-kirill@shutemov.name> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Debian-User: leitao On Fri, Nov 06, 2026 at 11:34:19AM +0000, Kiryl Shutsemau wrote: > On Thu, Nov 05, 2026 at 07:41:12AM -0800, Breno Leitao wrote: > > On Thu, Nov 05, 2026 at 12:08:34PM +0000, Kiryl Shutsemau wrote: > > Tested-by: Breno Leitao > > > > Tested on NVIDIA Grace (firmware SDEI) with next-20261104, KASAN + lockdep, > > ARM_SDEI_NMI=y: sysrq-l under stress-ng, with a kprobe on show_regs() and > > eprobes on irq_disable/irq_enable that fault on purpose. > > > > Without the series the box crashed (a task interrupted in el0t_64_sync > > got the handler's BRK, then lockdep/KASAN fallout and a hard lockup) > > > > With it, KPTI off and kpti=1, ~4000 kprobe hits and ~5500 faults in > > irqentry_nmi_enter()/exit() produced no warnings or stalls. > > Thanks for testing! > > Just to clarify, does your Tested-by apply for whole series, right? Right. I was planning to do it in the cover letter, but, there was no tags there (such as Signed-off-by:) so, I did it on the second one.