Add a way to manually invoke a fast-reboot rather than setting the NVRAM flag. The idea is to allow userspace to invoke a fast-reboot using the optional string argument to the reboot() system call, or using the xmon zr command so we don't need to leave around a persistent changes on a system to use the feature.
Signed-off-by: Oliver O'Halloran <ooh...@gmail.com> --- Companion skiboot patch: http://lists.ozlabs.org/pipermail/skiboot/2020-February/016420.html --- arch/powerpc/include/asm/opal-api.h | 1 + arch/powerpc/platforms/powernv/setup.c | 2 ++ 2 files changed, 3 insertions(+) diff --git a/arch/powerpc/include/asm/opal-api.h b/arch/powerpc/include/asm/opal-api.h index c1f25a7..1dffa3c 100644 --- a/arch/powerpc/include/asm/opal-api.h +++ b/arch/powerpc/include/asm/opal-api.h @@ -1067,6 +1067,7 @@ enum { OPAL_REBOOT_PLATFORM_ERROR = 1, OPAL_REBOOT_FULL_IPL = 2, OPAL_REBOOT_MPIPL = 3, + OPAL_REBOOT_FAST = 4, }; /* Argument to OPAL_PCI_TCE_KILL */ diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c index a8fe630..3bc188d 100644 --- a/arch/powerpc/platforms/powernv/setup.c +++ b/arch/powerpc/platforms/powernv/setup.c @@ -237,6 +237,8 @@ static void __noreturn pnv_restart(char *cmd) rc = opal_cec_reboot2(OPAL_REBOOT_MPIPL, NULL); else if (strcmp(cmd, "error") == 0) rc = opal_cec_reboot2(OPAL_REBOOT_PLATFORM_ERROR, NULL); + else if (strcmp(cmd, "fast") == 0) + rc = opal_cec_reboot2(OPAL_REBOOT_FAST, NULL); else rc = OPAL_UNSUPPORTED; -- 2.9.5
