diff options
| author | Timur Tabi <timur@freescale.com> | 2011-06-14 13:04:33 +0000 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2011-06-27 08:36:19 -0500 |
| commit | 14497d31e65cca73c9814a1ff373ae294aae616b (patch) | |
| tree | 982eb296f2234f40c8ad8c027dbaf92a900af872 | |
| parent | 2d05c392b8403d4a1becc8babd4b44465a758b64 (diff) | |
powerpc/85xx: disable timebase synchronization under the hypervisor
The Freescale hypervisor does not allow guests to write to the timebase
registers (virtualizing the timebase register was deemed too complicated),
so don't try to synchronize the timebase registers when we're running
under the hypervisor.
This typically happens when kexec support is enabled.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| -rw-r--r-- | arch/powerpc/platforms/85xx/p3041_ds.c | 11 | ||||
| -rw-r--r-- | arch/powerpc/platforms/85xx/p4080_ds.c | 11 | ||||
| -rw-r--r-- | arch/powerpc/platforms/85xx/p5020_ds.c | 11 |
3 files changed, 33 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/85xx/p3041_ds.c b/arch/powerpc/platforms/85xx/p3041_ds.c index 1fcd233a916..96d99a374dc 100644 --- a/arch/powerpc/platforms/85xx/p3041_ds.c +++ b/arch/powerpc/platforms/85xx/p3041_ds.c @@ -40,6 +40,9 @@ static int __init p3041_ds_probe(void) { unsigned long root = of_get_flat_dt_root(); +#ifdef CONFIG_SMP + extern struct smp_ops_t smp_85xx_ops; +#endif if (of_flat_dt_is_compatible(root, "fsl,P3041DS")) return 1; @@ -51,6 +54,14 @@ static int __init p3041_ds_probe(void) ppc_md.restart = fsl_hv_restart; ppc_md.power_off = fsl_hv_halt; ppc_md.halt = fsl_hv_halt; +#ifdef CONFIG_SMP + /* + * Disable the timebase sync operations because we can't write + * to the timebase registers under the hypervisor. + */ + smp_85xx_ops.give_timebase = NULL; + smp_85xx_ops.take_timebase = NULL; +#endif return 1; } diff --git a/arch/powerpc/platforms/85xx/p4080_ds.c b/arch/powerpc/platforms/85xx/p4080_ds.c index 430c8f96917..d1b21d7663e 100644 --- a/arch/powerpc/platforms/85xx/p4080_ds.c +++ b/arch/powerpc/platforms/85xx/p4080_ds.c @@ -39,6 +39,9 @@ static int __init p4080_ds_probe(void) { unsigned long root = of_get_flat_dt_root(); +#ifdef CONFIG_SMP + extern struct smp_ops_t smp_85xx_ops; +#endif if (of_flat_dt_is_compatible(root, "fsl,P4080DS")) return 1; @@ -50,6 +53,14 @@ static int __init p4080_ds_probe(void) ppc_md.restart = fsl_hv_restart; ppc_md.power_off = fsl_hv_halt; ppc_md.halt = fsl_hv_halt; +#ifdef CONFIG_SMP + /* + * Disable the timebase sync operations because we can't write + * to the timebase registers under the hypervisor. + */ + smp_85xx_ops.give_timebase = NULL; + smp_85xx_ops.take_timebase = NULL; +#endif return 1; } diff --git a/arch/powerpc/platforms/85xx/p5020_ds.c b/arch/powerpc/platforms/85xx/p5020_ds.c index f7220d47ddc..e8cba5004fd 100644 --- a/arch/powerpc/platforms/85xx/p5020_ds.c +++ b/arch/powerpc/platforms/85xx/p5020_ds.c @@ -40,6 +40,9 @@ static int __init p5020_ds_probe(void) { unsigned long root = of_get_flat_dt_root(); +#ifdef CONFIG_SMP + extern struct smp_ops_t smp_85xx_ops; +#endif if (of_flat_dt_is_compatible(root, "fsl,P5020DS")) return 1; @@ -51,6 +54,14 @@ static int __init p5020_ds_probe(void) ppc_md.restart = fsl_hv_restart; ppc_md.power_off = fsl_hv_halt; ppc_md.halt = fsl_hv_halt; +#ifdef CONFIG_SMP + /* + * Disable the timebase sync operations because we can't write + * to the timebase registers under the hypervisor. + */ + smp_85xx_ops.give_timebase = NULL; + smp_85xx_ops.take_timebase = NULL; +#endif return 1; } |