When running inside a virtual machine, we can not modify timebase, so
let's just not call the functions for it then.
This resolves hangs when booting e500 SMP guests on overcommitted hosts.
Reported-by: Stuart Yoder <b08...@freescale.com>
Signed-off-by: Alexander Graf <ag...@suse.de>
---
arch/powerpc/platforms/85xx/smp.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/platforms/85xx/smp.c
b/arch/powerpc/platforms/85xx/smp.c
index ff42490..d4b6c1f 100644
--- a/arch/powerpc/platforms/85xx/smp.c
+++ b/arch/powerpc/platforms/85xx/smp.c
@@ -249,6 +249,13 @@ void __init mpc85xx_smp_init(void)
smp_85xx_ops.cause_ipi = doorbell_cause_ipi;
}
+ /* When running under a hypervisor, we can not modify tb */
+ np = of_find_node_by_path("/hypervisor");
+ if (np) {
+ smp_85xx_ops.give_timebase = NULL;
+ smp_85xx_ops.take_timebase = NULL;
+ }
+
smp_ops = &smp_85xx_ops;
#ifdef CONFIG_KEXEC
--
1.6.0.2
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