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| author | Nathan Lynch <nathanl@linux.ibm.com> | 2019-06-11 23:45:04 -0500 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-06-15 16:52:06 +1000 |
| commit | d4aa219a074a5abaf95a756b9f0d190b5c03a945 (patch) | |
| tree | 7cc384e4d0cd03df4fab8a525be8ef3788113993 /arch/powerpc/kernel/cacheinfo.h | |
| parent | 0aa82c482ab2ece530a6f44897b63b274bb43c8e (diff) | |
| download | lwn-d4aa219a074a5abaf95a756b9f0d190b5c03a945.tar.gz lwn-d4aa219a074a5abaf95a756b9f0d190b5c03a945.zip | |
powerpc/cacheinfo: add cacheinfo_teardown, cacheinfo_rebuild
Allow external callers to force the cacheinfo code to release all its
references to cache nodes, e.g. before processing device tree updates
post-migration, and to rebuild the hierarchy afterward.
CPU online/offline must be blocked by callers; enforce this.
Fixes: 410bccf97881 ("powerpc/pseries: Partition migration in the kernel")
Signed-off-by: Nathan Lynch <nathanl@linux.ibm.com>
Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/cacheinfo.h')
| -rw-r--r-- | arch/powerpc/kernel/cacheinfo.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/cacheinfo.h b/arch/powerpc/kernel/cacheinfo.h index 955f5e999f1b..52bd3fc6642d 100644 --- a/arch/powerpc/kernel/cacheinfo.h +++ b/arch/powerpc/kernel/cacheinfo.h @@ -6,4 +6,8 @@ extern void cacheinfo_cpu_online(unsigned int cpu_id); extern void cacheinfo_cpu_offline(unsigned int cpu_id); +/* Allow migration/suspend to tear down and rebuild the hierarchy. */ +extern void cacheinfo_teardown(void); +extern void cacheinfo_rebuild(void); + #endif /* _PPC_CACHEINFO_H */ |