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 E555D1ABEC6; Mon, 14 Oct 2024 14:26:25 +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=1728915986; cv=none; b=AEo9+5bjLJfRFh6c4qGUPRHde0mpjFPnGf6jZdQA6jV3jk9LAZXuT/lDoA6mfvzxQQMPYfNodHMaceOnMDXhlTdyz/8q5qD1hm6qJQDz+vJiS47I0/V0i42yp6UIEzyrcjIRnnkQvKZvUT+nbgnoZCfDTq3gje1jkVbn9Thy070= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728915986; c=relaxed/simple; bh=4zlaHqAmBdKk2Xn681ZO72tbc+I3WhU+lLHTsErauh0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=BDJR4WD6+5rXzs7Z3yYIDDyh2fDxvsaK3aRQfcutoGHVsbTV5U7vFeozwb8zhMj0e0SdBTQ24iYyMC5UHS84nWotTY6GBHXdoK9yHh7sUCYggkII5vIyIcUyuuWdmmT9UzDHDDVjz6R7umYsl7l/zwEK+kkmh1cgbGA1K2A+zyA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=VX5kxKKI; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="VX5kxKKI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0F4B4C4CEC3; Mon, 14 Oct 2024 14:26:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1728915985; bh=4zlaHqAmBdKk2Xn681ZO72tbc+I3WhU+lLHTsErauh0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VX5kxKKItKGMNd/2XvJ90N5nOidVvGYSXCaREHkPqJ/BUp0KR3PU31W4s/28Xw8bT n/Qn8ubrYnt1wGi54RUrnf64+DlQza+c6RcrDC8OtZ1q77msweRucalMSXfNFmgDKE 1vpCf4V1PXB5Z6ICLQ37SebulBINYYjOisWU9qSo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Sven Schnelle , Heiko Carstens , Vasily Gorbik , Sasha Levin Subject: [PATCH 6.11 026/214] s390/traps: Handle early warnings gracefully Date: Mon, 14 Oct 2024 16:18:09 +0200 Message-ID: <20241014141046.013543678@linuxfoundation.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241014141044.974962104@linuxfoundation.org> References: <20241014141044.974962104@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.11-stable review patch. If anyone has any objections, please let me know. ------------------ 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 ee051ad81c711..0242fa78c9189 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