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| author | Jane Chu <jane.chu@oracle.com> | 2017-06-06 14:32:29 -0600 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2017-06-25 22:02:18 -0400 |
| commit | 94d53c5028a392e3aafb00871e867776b0fc868c (patch) | |
| tree | d51c60bfcdc868114e49ac045189c5c060eeb766 /security | |
| parent | 252bf31f5d919ead8cb638cbf1228a400b78dec4 (diff) | |
arch/sparc: support NR_CPUS = 4096
[ Upstream commit c79a13734d104b5b147d7cb0870276ccdd660dae ]
Linux SPARC64 limits NR_CPUS to 4064 because init_cpu_send_mondo_info()
only allocates a single page for NR_CPUS mondo entries. Thus we cannot
use all 4096 CPUs on some SPARC platforms.
To fix, allocate (2^order) pages where order is set according to the size
of cpu_list for possible cpus. Since cpu_list_pa and cpu_mondo_block_pa
are not used in asm code, there are no imm13 offsets from the base PA
that will break because they can only reach one page.
Orabug: 25505750
Signed-off-by: Jane Chu <jane.chu@oracle.com>
Reviewed-by: Bob Picco <bob.picco@oracle.com>
Reviewed-by: Atish Patra <atish.patra@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Diffstat (limited to 'security')
0 files changed, 0 insertions, 0 deletions