diff options
| 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/include/asm/prom.h | |
| 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/include/asm/prom.h')
| -rw-r--r-- | arch/powerpc/include/asm/prom.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/prom.h b/arch/powerpc/include/asm/prom.h index 2ea8b856d605..bc2da154f68b 100644 --- a/arch/powerpc/include/asm/prom.h +++ b/arch/powerpc/include/asm/prom.h @@ -128,6 +128,7 @@ struct of_drconf_cell { #define OV5_CMO 0x0480 /* Cooperative Memory Overcommitment */ #define OV5_XCMO 0x0440 /* Page Coalescing */ #define OV5_TYPE1_AFFINITY 0x0580 /* Type 1 NUMA affinity */ +#define OV5_PRRN 0x0540 /* Platform Resource Reassignment */ #define OV5_PFO_HW_RNG 0x0E80 /* PFO Random Number Generator */ #define OV5_PFO_HW_842 0x0E40 /* PFO Compression Accelerator */ #define OV5_PFO_HW_ENCR 0x0E20 /* PFO Encryption Accelerator */ |