From 8139046a5a34787849df81f4a5875cf4b404a7a1 Mon Sep 17 00:00:00 2001 From: Vaibhav Jain Date: Fri, 7 Sep 2018 13:04:48 +0530 Subject: powerpc/powernv: Make possible for user to force a full ipl cec reboot Ever since fast reboot is enabled by default in opal, opal_cec_reboot() will use fast-reset instead of full IPL to perform system reboot. This leaves the user with no direct way to force a full IPL reboot except changing an nvram setting that persistently disables fast-reset for all subsequent reboots. This patch provides a more direct way for the user to force a one-shot full IPL reboot by passing the command line argument 'full' to the reboot command. So the user will be able to tweak the reboot behavior via: $ sudo reboot full # Force a full ipl reboot skipping fast-reset or $ sudo reboot # default reboot path (usually fast-reset) The reboot command passes the un-parsed command argument to the kernel via the 'Reboot' syscall which is then passed on to the arch function pnv_restart(). The patch updates pnv_restart() to handle this cmd-arg and issues opal_cec_reboot2 with OPAL_REBOOT_FULL_IPL to force a full IPL reset. Signed-off-by: Vaibhav Jain Acked-by: Andrew Donnellan Signed-off-by: Michael Ellerman --- arch/powerpc/include/asm/opal-api.h | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/powerpc/include/asm/opal-api.h') diff --git a/arch/powerpc/include/asm/opal-api.h b/arch/powerpc/include/asm/opal-api.h index 8365353330b4..870fb7b239ea 100644 --- a/arch/powerpc/include/asm/opal-api.h +++ b/arch/powerpc/include/asm/opal-api.h @@ -1050,6 +1050,7 @@ enum OpalSysCooling { enum { OPAL_REBOOT_NORMAL = 0, OPAL_REBOOT_PLATFORM_ERROR = 1, + OPAL_REBOOT_FULL_IPL = 2, }; /* Argument to OPAL_PCI_TCE_KILL */ -- cgit v1.2.3