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 98D6420FA62; Fri, 4 Oct 2024 18:27:40 +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=1728066460; cv=none; b=bMpdsOLy2ifEL4bux7nRLgmzo9cZiZ27iOQgQO3dB/XKrbTgaYO2HdxCNsRMX+farEzPJrXzG/ejzXQ04Io52uZE+OFkPS8BgV9xCjwqlyT51ADHOzhg5htONEgZ0VO7HvKz6Tyv68EhsjRaQf3EELqDTJfKOwiRWqFe/UHtOAQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728066460; c=relaxed/simple; bh=22NiTlrLzqFA6vHmK8OCpWgZaefPmZnuRlMrNDQeUu0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ESPST1UyKePXuTZxLFKuUFj5vMxQiqTDMDOtY56XVx/BPOJ5zsXO4boaEe+oSUG/5unWB3bWe9U3D2o83Ajdqh42fDwIEUpPqKt11ajSGfgQSTb/mYGoHGC7EFc7JXlrrGgbKjasZ4D2BvtQpZdZ0zz1dJY2t5KFc1bEiIdDuDA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=bWfbmkEx; 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="bWfbmkEx" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7B1DAC4CECC; Fri, 4 Oct 2024 18:27:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1728066460; bh=22NiTlrLzqFA6vHmK8OCpWgZaefPmZnuRlMrNDQeUu0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bWfbmkExz4yeVTZTPUIEABCvqsilPopqavMkgBopTu0mHQCZhRFHZVJqYJ/gz/PCm /EIIvcyCt5qsXwgPPP7jiHqjbawk3ET6WQB/Tv5gMJa8chFz5pXe0hh9pUUSm0WEeZ rwNgzQeE0yEEeA++AhEsgOPmPLSoJYr9IB0G4eLXUkpnocVUrSdmR4otdb7GjWsV8D vT79/8IwxZLUMgwgVfOHYs82Tb5FZJoSAdBeSs3n/s054W0ZF8V31zx9lSMR0b3JkP DhJYRucA1fhE7zADE1OWriWaumqSbKCbRmxLYn2oVQcwX83zo8BAsAtnVaamUcCuN3 0nkgjw8F3yPtQ== 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 6.1 12/42] s390/traps: Handle early warnings gracefully Date: Fri, 4 Oct 2024 14:26:23 -0400 Message-ID: <20241004182718.3673735-12-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241004182718.3673735-1-sashal@kernel.org> References: <20241004182718.3673735-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.1.112 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 b3cb256ec6692..1dcdce60b89c7 100644 --- a/arch/s390/kernel/early.c +++ b/arch/s390/kernel/early.c @@ -151,8 +151,21 @@ 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