On 09/03/2018 03:56 PM, Vaibhav Jain wrote:
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:
.../...
/* Argument to OPAL_PCI_TCE_KILL */
diff --git a/arch/powerpc/platforms/powernv/setup.c
b/arch/powerpc/platforms/powernv/setup.c
index adddde023622..650484e0940b 100644
--- a/arch/powerpc/platforms/powernv/setup.c
+++ b/arch/powerpc/platforms/powernv/setup.c
@@ -224,7 +224,22 @@ static void __noreturn pnv_restart(char *cmd)
pnv_prepare_going_down();
while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {
- rc = opal_cec_reboot();
+ /* See if we need to do a full IPL reboot */
+ if (cmd && strcmp(cmd, "full") == 0)
+ rc = opal_cec_reboot2(OPAL_REBOOT_FULL_IPL, NULL);
+ else
+ rc = OPAL_UNSUPPORTED;
As discussed offline, please handle OPAL_SUCCESS case well.
-Vasant
