From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3E8511DD873; Fri, 4 Oct 2024 18:19:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728065943; cv=none; b=jmMIBV+yaM1YS6ZaGeC+nj2IfJV+K7RDrk2EI2RnxX7N3b7p8PsYoVluLbLFQzvbmXFQYYMr9q0R8Hub2fuTYMFJJxWahf+3dETpGeAnWZ2g1gOVASQGCD8p1zBrtqXydVvdGswjjsgLkvdDWM7ChUcb7AJa8pTB2+VNphZRo1A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728065943; c=relaxed/simple; bh=J/CJ1wHjeMBBZix/ZJOLlFTggi6BPobk8g6fjsbu52A=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=SLKk0NfSiVpnuVOJ/BH+2oXsPyIGgCevC17kzjezpjmRFzEVHGdwE04AMpilCo9pIzEBfy8ksNUXsEygtYSAotVdtG2F5MxWMFnUBaYqg0tH1K/yU2Vxz929Gx5urixeFI7yg0ueWQdf+XXQUKzerZsdTo08Y/nTvwxvm0Kw20Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=pfqqXA4m; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="pfqqXA4m" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CE53DC4CEC6; Fri, 4 Oct 2024 18:19:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1728065942; bh=J/CJ1wHjeMBBZix/ZJOLlFTggi6BPobk8g6fjsbu52A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pfqqXA4m71EjTyUxopqvlAEIiX0ADRIYrW6svsy8aE6vSyItU9LdCrUxyCt4J7eL/ ZwylOouMI/yiQ0VZ0Eaf5SapOGZICmlRsESf7daEUK5MfbBkWNsZY0LwSX/rX9fDTx 2gBBNJqN0AjWo4fonNG1BMqHMBY1ZJ3GUofTvlttoffoKKOEs2Fe0dTit0T12emtG4 iv+96adf40EGbjjLMZSDLnGuZoPIJ7a5MbtwtK2mc8Wse9La6sdswQLqnApPLBsaMp MdIwgw6hBJXhqbOTas3iz8zECchi421m0zfpkCm4IAqwtr/DL+D4kPvTsDTRWlKtid 5kGrfb57SXfeg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Heiko Carstens , Sven Schnelle , Vasily Gorbik , Sasha Levin , agordeev@linux.ibm.com, brueckner@linux.ibm.com, linux-s390@vger.kernel.org Subject: [PATCH AUTOSEL 6.11 19/76] s390/traps: Handle early warnings gracefully Date: Fri, 4 Oct 2024 14:16:36 -0400 Message-ID: <20241004181828.3669209-19-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241004181828.3669209-1-sashal@kernel.org> References: <20241004181828.3669209-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.11.2 Content-Transfer-Encoding: 8bit From: Heiko Carstens [ Upstream commit 3c4d0ae0671827f4b536cc2d26f8b9c54584ccc5 ] Add missing warning handling to the early program check handler. This way a warning is printed to the console as soon as the early console is setup, and the kernel continues to boot. Before this change a disabled wait psw was loaded instead and the machine was silently stopped without giving an idea about what happened. Reviewed-by: Sven Schnelle Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik Signed-off-by: Sasha Levin --- arch/s390/kernel/early.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c index 14d324865e33f..ecae246e8d5d4 100644 --- a/arch/s390/kernel/early.c +++ b/arch/s390/kernel/early.c @@ -177,8 +177,21 @@ static __init void setup_topology(void) void __do_early_pgm_check(struct pt_regs *regs) { - if (!fixup_exception(regs)) - disabled_wait(); + struct lowcore *lc = get_lowcore(); + unsigned long ip; + + regs->int_code = lc->pgm_int_code; + regs->int_parm_long = lc->trans_exc_code; + ip = __rewind_psw(regs->psw, regs->int_code >> 16); + + /* Monitor Event? Might be a warning */ + if ((regs->int_code & PGM_INT_CODE_MASK) == 0x40) { + if (report_bug(ip, regs) == BUG_TRAP_TYPE_WARN) + return; + } + if (fixup_exception(regs)) + return; + disabled_wait(); } static noinline __init void setup_lowcore_early(void) -- 2.43.0