[Skiboot] [PATCH] core/direct-controls: Add sreset support for P8

[Maxim Polyakov]

VESNIN server uses NMI SRESET signal to initiate memory dumping with
kdump in case of crash of the host OS. It is not necessary to return
control to the host's kernel since it has already crashed. This
commit allows for registration and handling of
opal_signal_system_reset signal for POWER8 based systems.

Signed-off-by: Maxim Polyakov <m.polyakov at yadro.com>
---
 core/direct-controls.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/core/direct-controls.c b/core/direct-controls.c
index 04b93a1..b05e6bc 100644
--- a/core/direct-controls.c
+++ b/core/direct-controls.c
@@ -824,7 +824,7 @@ int64_t opal_signal_system_reset(int cpu_nr)
 	struct cpu_thread *cpu;
 	int64_t ret;
 
-	if (proc_gen != proc_gen_p9)
+	if (proc_gen != proc_gen_p9 && proc_gen != proc_gen_p8)
 		return OPAL_UNSUPPORTED;
 
 	/*
@@ -856,13 +856,15 @@ void direct_controls_init(void)
 	if (chip_quirk(QUIRK_MAMBO_CALLOUTS))
 		return;
 
-	if (proc_gen != proc_gen_p9)
+	if (proc_gen != proc_gen_p9 && proc_gen != proc_gen_p8)
 		return;
 
 	/* DD1 has some sreset quirks we do not support */
-	version = mfspr(SPR_PVR);
-	if (is_power9n(version) && PVR_VERS_MAJ(version) == 1)
-		return;
+	if (proc_gen == proc_gen_p9) {
+		version = mfspr(SPR_PVR);
+		if (is_power9n(version) && PVR_VERS_MAJ(version) == 1)
+			return;
+	}
 
 	opal_register(OPAL_SIGNAL_SYSTEM_RESET, opal_signal_system_reset, 1);
 }
-- 
2.7.4