f1fa74f4af
This adds an option to spufs when the kernel is configured for 4K page to give it the ability to use 64K pages for SPE local store mappings. Currently, we are optimistic and try order 4 allocations when creating contexts. If that fails, the code will fallback to 4K automatically. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
77 lines
1.8 KiB
Plaintext
77 lines
1.8 KiB
Plaintext
config PPC_CELL
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bool
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default n
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config PPC_CELL_NATIVE
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bool
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select PPC_CELL
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select PPC_DCR_MMIO
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select PPC_OF_PLATFORM_PCI
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select PPC_INDIRECT_IO
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select PPC_NATIVE
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select MPIC
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default n
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config PPC_IBM_CELL_BLADE
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bool "IBM Cell Blade"
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depends on PPC_MULTIPLATFORM && PPC64
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select PPC_CELL_NATIVE
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select PPC_RTAS
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select MMIO_NVRAM
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select PPC_UDBG_16550
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select UDBG_RTAS_CONSOLE
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menu "Cell Broadband Engine options"
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depends on PPC_CELL
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config SPU_FS
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tristate "SPU file system"
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default m
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depends on PPC_CELL
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select SPU_BASE
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select MEMORY_HOTPLUG
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help
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The SPU file system is used to access Synergistic Processing
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Units on machines implementing the Broadband Processor
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Architecture.
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config SPU_FS_64K_LS
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bool "Use 64K pages to map SPE local store"
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# we depend on PPC_MM_SLICES for now rather than selecting
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# it because we depend on hugetlbfs hooks being present. We
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# will fix that when the generic code has been improved to
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# not require hijacking hugetlbfs hooks.
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depends on SPU_FS && PPC_MM_SLICES && !PPC_64K_PAGES
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default y
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select PPC_HAS_HASH_64K
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help
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This option causes SPE local stores to be mapped in process
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address spaces using 64K pages while the rest of the kernel
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uses 4K pages. This can improve performances of applications
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using multiple SPEs by lowering the TLB pressure on them.
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config SPU_BASE
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bool
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default n
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config CBE_RAS
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bool "RAS features for bare metal Cell BE"
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depends on PPC_CELL_NATIVE
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default y
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config CBE_THERM
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tristate "CBE thermal support"
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default m
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depends on CBE_RAS
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config CBE_CPUFREQ
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tristate "CBE frequency scaling"
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depends on CBE_RAS && CPU_FREQ
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default m
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help
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This adds the cpufreq driver for Cell BE processors.
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For details, take a look at <file:Documentation/cpu-freq/>.
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If you don't have such processor, say N
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endmenu
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