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| author | Jesse Larrew <jlarrew@linux.vnet.ibm.com> | 2013-04-24 10:00:35 +0400 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-04-26 10:08:23 +0400 |
| commit | 5d88aa85c00bb4026dd986430dc496effc637d42 (patch) | |
| tree | 206edc195104eb8258a36b25f5247055211164c2 /arch/powerpc/platforms/pseries/firmware.c | |
| parent | 8002b0c54b16931ad71771e6c97e46aca1be4456 (diff) | |
| download | linux-5d88aa85c00bb4026dd986430dc496effc637d42.tar.xz | |
powerpc/pseries: Update CPU maps when device tree is updated
Platform events such as partition migration or the new PRRN firmware
feature can cause the NUMA characteristics of a CPU to change, and these
changes will be reflected in the device tree nodes for the affected
CPUs.
This patch registers a handler for Open Firmware device tree updates
and reconfigures the CPU and node maps whenever the associativity
changes. Currently, this is accomplished by marking the affected CPUs in
the cpu_associativity_changes_mask and allowing
arch_update_cpu_topology() to retrieve the new associativity information
using hcall_vphn().
Protecting the NUMA cpu maps from concurrent access during an update
operation will be addressed in a subsequent patch in this series.
Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/platforms/pseries/firmware.c')
| -rw-r--r-- | arch/powerpc/platforms/pseries/firmware.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/firmware.c b/arch/powerpc/platforms/pseries/firmware.c index 06639fa2d61d..8c80588abacc 100644 --- a/arch/powerpc/platforms/pseries/firmware.c +++ b/arch/powerpc/platforms/pseries/firmware.c @@ -110,6 +110,7 @@ struct vec5_fw_feature { static __initdata struct vec5_fw_feature vec5_fw_features_table[] = { {FW_FEATURE_TYPE1_AFFINITY, OV5_TYPE1_AFFINITY}, + {FW_FEATURE_PRRN, OV5_PRRN}, }; void __init fw_vec5_feature_init(const char *vec5, unsigned long len) |