From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oNFb1-007QDa-AI for linux-um@lists.infradead.org; Sun, 14 Aug 2022 15:32:13 +0000 From: Sasha Levin Subject: [PATCH AUTOSEL 5.18 38/56] um: add "noreboot" command line option for PANIC_TIMEOUT=-1 setups Date: Sun, 14 Aug 2022 11:30:08 -0400 Message-Id: <20220814153026.2377377-38-sashal@kernel.org> In-Reply-To: <20220814153026.2377377-1-sashal@kernel.org> References: <20220814153026.2377377-1-sashal@kernel.org> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-um" Errors-To: linux-um-bounces+geert=linux-m68k.org@lists.infradead.org To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: "Jason A. Donenfeld" , Richard Weinberger , Sasha Levin , anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, linux@roeck-us.net, linux-um@lists.infradead.org From: "Jason A. Donenfeld" [ Upstream commit dda520d07b95072a0b63f6c52a8eb566d08ea897 ] QEMU has a -no-reboot option, which halts instead of reboots when the guest asks to reboot. This is invaluable when used with CONFIG_PANIC_TIMEOUT=-1 (and panic_on_warn), because it allows panics and warnings to be caught immediately in CI. Implement this in UML too, by way of a basic setup param. Signed-off-by: Jason A. Donenfeld Signed-off-by: Richard Weinberger Signed-off-by: Sasha Levin --- arch/um/os-Linux/skas/process.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c index 87d3129e7362..0df2ebcc97c0 100644 --- a/arch/um/os-Linux/skas/process.c +++ b/arch/um/os-Linux/skas/process.c @@ -5,6 +5,7 @@ */ #include +#include #include #include #include @@ -707,10 +708,24 @@ void halt_skas(void) UML_LONGJMP(&initial_jmpbuf, INIT_JMP_HALT); } +static bool noreboot; + +static int __init noreboot_cmd_param(char *str, int *add) +{ + noreboot = true; + return 0; +} + +__uml_setup("noreboot", noreboot_cmd_param, +"noreboot\n" +" Rather than rebooting, exit always, akin to QEMU's -no-reboot option.\n" +" This is useful if you're using CONFIG_PANIC_TIMEOUT in order to catch\n" +" crashes in CI\n"); + void reboot_skas(void) { block_signals_trace(); - UML_LONGJMP(&initial_jmpbuf, INIT_JMP_REBOOT); + UML_LONGJMP(&initial_jmpbuf, noreboot ? INIT_JMP_HALT : INIT_JMP_REBOOT); } void __switch_mm(struct mm_id *mm_idp) -- 2.35.1 _______________________________________________ linux-um mailing list linux-um@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-um