From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 56A3A606A338 for ; Fri, 6 Nov 2026 11:53:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=gxVNPbmw; dkim=fail reason="signature verification failed" (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=lists.infradead.org; s=bombadil.20210309; h=Sender:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To: Content-Type:MIME-Version:References:Message-ID:Subject:To:From:Date:Reply-To :Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Unsubscribe-Post:List-Owner; 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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 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-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Debian-User: leitao X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261106_035348_222337_FD09E55A X-CRM114-Status: GOOD ( 13.82 ) X-Spam-Score: -4.4 (----) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Thomas Huth , Vladimir Murzin , Usama Arif , Peter Zijlstra , Catalin Marinas , Jinjie Ruan , kernel-team@meta.com, Doug Anderson , stable@vger.kernel.org, linux-kernel@vger.kernel.org, James Morse , linux-arm-kernel@lists.infradead.org, Marc Zyngier , mrigendrachaubey , Will Deacon , Linus Walleij , Dawei Li Sender: "linux-arm-kernel" X-Spam-Status: No, score=-8.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 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.