diff options
| author | Oliver O'Halloran <oohall@gmail.com> | 2020-02-17 13:48:33 +1100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-03-04 22:44:27 +1100 |
| commit | 672e480aa21023fc8e4b6ab8635d8898822b97e7 (patch) | |
| tree | 5ce69d329d73eb81f908c505b1e834067543c803 /arch | |
| parent | 16985f2d25095899685952296f128a71f0aff05c (diff) | |
powerpc/powernv: Add explicit fast-reboot support
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 <oohall@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200217024833.30580-2-oohall@gmail.com
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/include/asm/opal-api.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powernv/setup.c | 2 |
2 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/opal-api.h b/arch/powerpc/include/asm/opal-api.h index c1f25a760eb1..1dffa3cb16ba 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 a8fe630cf7cc..3bc188da82ba 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; |