Benjamin Herrenschmidt
d0f13e3c20
[POWERPC] Introduce address space "slices" ...
The basic issue is to be able to do what hugetlbfs does but with
different page sizes for some other special filesystems; more
specifically, my need is:
- Huge pages
- SPE local store mappings using 64K pages on a 4K base page size
kernel on Cell
- Some special 4K segments in 64K-page kernels for mapping a dodgy
type of powerpc-specific infiniband hardware that requires 4K MMU
mappings for various reasons I won't explain here.
The main issues are:
- To maintain/keep track of the page size per "segment" (as we can
only have one page size per segment on powerpc, which are 256MB
divisions of the address space).
- To make sure special mappings stay within their allotted
"segments" (including MAP_FIXED crap)
- To make sure everybody else doesn't mmap/brk/grow_stack into a
"segment" that is used for a special mapping
Some of the necessary mechanisms to handle that were present in the
hugetlbfs code, but mostly in ways not suitable for anything else.
The patch relies on some changes to the generic get_unmapped_area()
that just got merged. It still hijacks hugetlb callbacks here or
there as the generic code hasn't been entirely cleaned up yet but
that shouldn't be a problem.
So what is a slice ? Well, I re-used the mechanism used formerly by our
hugetlbfs implementation which divides the address space in
"meta-segments" which I called "slices". The division is done using
256MB slices below 4G, and 1T slices above. Thus the address space is
divided currently into 16 "low" slices and 16 "high" slices. (Special
case: high slice 0 is the area between 4G and 1T).
Doing so simplifies significantly the tracking of segments and avoids
having to keep track of all the 256MB segments in the address space.
While I used the "concepts" of hugetlbfs, I mostly re-implemented
everything in a more generic way and "ported" hugetlbfs to it.
Slices can have an associated page size, which is encoded in the mmu
context and used by the SLB miss handler to set the segment sizes. The
hash code currently doesn't care, it has a specific check for hugepages,
though I might add a mechanism to provide per-slice hash mapping
functions in the future.
The slice code provide a pair of "generic" get_unmapped_area() (bottomup
and topdown) functions that should work with any slice size. There is
some trickiness here so I would appreciate people to have a look at the
implementation of these and let me know if I got something wrong.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-05-09 16:35:00 +10:00
[POWERPC] Refactor 64 bits DMA operations
2006-12-04 20:38:40 +11:00
[POWERPC] Use mtocrf instruction in asm when CONFIG_POWER4_ONLY=y
2007-04-13 03:55:13 +10:00
atomic.h: atomic_add_unless as inline. Remove system.h atomic.h circular dependency
2007-05-08 11:15:20 -07:00
[PATCH] powermac: More powermac backlight fixes
2006-07-31 13:28:45 -07:00
atomic.h: add atomic64 cmpxchg, xchg and add_unless to powerpc
2007-05-08 11:15:19 -07:00
[POWERPC] Fix manual assembly WARN_ON() in enter_rtas().
2007-01-09 17:03:02 +11:00
[POWERPC] DEBUG_PAGEALLOC for 32-bit
2007-04-13 04:09:39 +10:00
[POWERPC] cell: add cbe_node_to_cpu function
2007-04-23 21:44:38 +02:00
[NET]: POWERPC checksum annotations and cleanups.
2006-12-02 21:23:20 -08:00
[POWERPC] pasemi: PA6T oprofile support
2007-04-24 21:31:51 +10:00
[PATCH] powerpc: implement missing jiffies64_to_cputime64()
2006-07-05 09:39:54 -07:00
[POWERPC] Include stddef.h in asm-powerpc/current.h to get offsetof
2007-03-09 15:03:24 +11:00
[POWERPC] Xserve cpu-meter driver
2006-12-04 20:39:30 +11:00
[POWERPC] Generic DCR infrastructure
2006-12-04 16:08:25 +11:00
[POWERPC] More DCR native fixups
2007-02-16 14:00:19 +11:00
[POWERPC] Compile fixes for arch/powerpc dcr code
2007-02-07 14:03:23 +11:00
[POWERPC] Refactor 64 bits DMA operations
2006-12-04 20:38:40 +11:00
[PATCH] dma-mapping.h stubs fix
2007-01-30 08:39:21 -08:00
[POWERPC] EDAC ECC software scrubber
2007-03-09 15:03:25 +11:00
[POWERPC] Merge 32 and 64 bits asm-powerpc/io.h
2006-12-04 20:39:05 +11:00
[POWERPC] EEH: rm un-needed data
2007-03-22 22:52:55 +11:00
[POWERPC] Move ELF_ET_DYN_BASE up to 512MB point
2007-01-24 21:13:56 +11:00
[POWERPC] Only use H_BULK_REMOVE if the firmware supports it
2007-02-08 15:02:35 +11:00
[PATCH] ANSIfy powerpc floppy.h
2007-03-14 15:27:50 -07:00
[POWERPC] Fix kernel build errors for mpc8272ads and mpc8560ads
2007-02-07 14:03:20 +11:00
[PATCH] mm: pagefault_{disable,enable}()
2006-12-07 08:39:21 -08:00
[POWERPC] Avoid hypervisor statistics calculation in real mode
2007-03-22 15:01:43 +11:00
[POWERPC] Delete unused irq functions on powerpc
2006-12-08 17:10:18 +11:00
[POWERPC] Fix CHRP platforms with only 8259
2006-10-25 13:49:22 +10:00
[POWERPC] ibmebus: dynamic addition/removal of adapters, some code cleanup
2007-03-16 16:38:19 +11:00
[POWERPC] Merge 32 and 64 bits asm-powerpc/io.h
2006-12-04 20:39:05 +11:00
[POWERPC] 86xx/85xx: Unify Freescale PCI Express memory map registers structure
2007-03-26 17:03:49 -05:00
[POWERPC] qe: ucc_slow.guemr is in the wrong place
2007-03-29 14:33:56 -05:00
[POWERPC] Merge 32 and 64 bits asm-powerpc/io.h
2006-12-04 20:39:05 +11:00
[POWERPC] Generic check_legacy_ioport
2007-04-27 21:14:30 +10:00
[POWERPC] DART iommu suspend
2007-05-07 20:31:14 +10:00
[POWERPC] 83xx: Return a point to the struct ipic from ipic_init()
2007-01-26 01:45:32 -06:00
[POWERPC] Add IRQ remapping hook
2007-01-24 21:13:59 +11:00
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
2006-10-05 15:10:12 +01:00
[PATCH] lockdep: irqtrace subsystem, core
2006-07-03 15:27:03 -07:00
[PATCH] ps3: Virtual Frame Buffer Driver
2007-02-12 09:48:44 -08:00
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc
2007-05-08 11:50:19 -07:00
[POWERPC] kdump: Support kernels having 64k page size.
2006-09-13 18:30:04 +10:00
kdump/kexec: calculate note size at compile time
2007-05-08 11:15:07 -07:00
[POWERPC] Minor fault path optimization
2007-05-02 20:57:39 +10:00
Fix Maple PATA IRQ assignment.
2007-01-26 17:27:40 -05:00
local_t: powerpc extension
2007-05-08 11:15:20 -07:00
[POWERPC] Update lppaca offset comments
2006-08-08 17:08:58 +10:00
[POWERPC] ps3: add lv1 hvcalls
2006-12-04 20:40:44 +11:00
[POWERPC] PowerPC MSI infrastructure
2007-05-08 13:40:31 +10:00
[POWERPC] Early serial debug support for PPC44x
2007-05-08 14:47:33 +10:00
[POWERPC] Introduce address space "slices"
2007-05-09 16:35:00 +10:00
[POWERPC] Revise PPC44x MMU code for arch/powerpc
2007-05-02 20:04:29 +10:00
[PATCH] x86: PARAVIRT: add hooks to intercept mm creation and destruction
2007-05-02 19:27:14 +02:00
[POWERPC] Generic BUG for powerpc
2006-12-11 16:35:07 +11:00
[POWERPC] Add mpc866ads board-specific bits to arch/powerpc
2007-02-07 14:03:17 +11:00
[POWERPC] mpc52xx suspend to deep-sleep
2007-05-07 20:31:15 +10:00
[PATCH] ppc: Fix io.h for config with CONFIG_PCI not set
2006-11-13 14:49:25 +11:00
[POWERPC] Use mpc8641hpcn PIC base address from dev tree.
2006-08-25 14:32:13 +10:00
[POWERPC] cpm2: CPM2 interrupt controller fix
2007-02-07 14:03:20 +11:00
[POWERPC] MPIC MSI allocator
2007-05-08 13:43:48 +10:00
[POWERPC] Export of_device_get_modalias
2007-05-07 20:31:15 +10:00
[POWERPC] Souped-up of_platform_device support
2006-12-04 16:08:52 +11:00
[POWERPC] pasemi: PA6T oprofile support
2007-04-24 21:31:51 +10:00
[POWERPC] Introduce address space "slices"
2007-05-09 16:35:00 +10:00
[POWERPC] Remove use of 4level-fixup.h for ppc32
2007-05-08 13:40:31 +10:00
[POWERPC] Kill off the PTE_FMT macro
2007-05-07 20:31:14 +10:00
[POWERPC] Introduce address space "slices"
2007-05-09 16:35:00 +10:00
parport->dev driver model support
2007-05-08 11:15:05 -07:00
[POWERPC] Add a field for each specific bus to struct pci_controller
2007-01-24 21:13:59 +11:00
[POWERPC] Create and use get_pci_dma_ops()
2007-03-09 15:03:25 +11:00
[PATCH] lockdep: add per_cpu_offset()
2006-07-03 15:27:00 -07:00
[POWERPC] Remove use of 4level-fixup.h for ppc32
2007-05-08 13:40:31 +10:00
[POWERPC] Remove arch/powerpc's dependence on asm-ppc/pg{alloc,table}.h
2007-05-02 20:04:30 +10:00
[POWERPC] Remove arch/powerpc's dependence on asm-ppc/pg{alloc,table}.h
2007-05-02 20:04:30 +10:00
[POWERPC] Remove arch/powerpc's dependence on asm-ppc/pg{alloc,table}.h
2007-05-02 20:04:30 +10:00
[POWERPC] Remove arch/powerpc's dependence on asm-ppc/pg{alloc,table}.h
2007-05-02 20:04:30 +10:00
[POWERPC] Remove use of 4level-fixup.h for ppc32
2007-05-08 13:40:31 +10:00
[POWERPC] Remove arch/powerpc's dependence on asm-ppc/pg{alloc,table}.h
2007-05-02 20:04:30 +10:00
[POWERPC] Remove arch/powerpc's dependence on asm-ppc/pg{alloc,table}.h
2007-05-02 20:04:30 +10:00
[POWERPC] pmac_feature_call checks platform
2007-05-02 16:35:01 +10:00
typo fixes: mecanism -> mechanism
2006-06-30 18:20:44 +02:00
[POWERPC] pasemi: PA6T oprofile support
2007-04-24 21:31:51 +10:00
[POWERPC] Add PMI driver for cell blade
2007-02-16 14:00:19 +11:00
[PATCH] FD_ZERO build fix
2007-01-11 18:18:22 -08:00
[POWERPC] EEH: wait for slot status
2007-03-22 22:52:54 +11:00
[POWERPC] Cell timebase bug workaround
2006-10-25 11:54:18 +10:00
[POWERPC] Remove last_syscall
2007-03-22 22:52:58 +11:00
[POWERPC] Uninline of_iomap function
2007-05-02 20:04:29 +10:00
[POWERPC] PS3: Interrupt routine fixups.
2007-05-02 20:04:31 +10:00
ps3: Make `ps3videomode -v 0 (auto mode) work again
2007-05-04 17:59:08 -07:00
[PATCH] ps3: cleanup ps3fb before clearing HPTE
2007-02-12 09:48:44 -08:00
[PATCH] Add regs_return_value() helper
2006-10-02 07:57:16 -07:00
[POWERPC] Add QUICC Engine (QE) infrastructure
2006-10-04 15:24:27 +10:00
[POWERPC] Add QUICC Engine (QE) infrastructure
2006-10-04 15:24:27 +10:00
[POWERPC] pasemi: PA6T oprofile support
2007-04-24 21:31:51 +10:00
[POWERPC] Add rtas_service_present() helper
2006-12-08 17:10:22 +11:00
[PATCH] lockdep: remove RWSEM_DEBUG remnants
2006-07-03 15:27:01 -07:00
[PATCH] cleanup asm/setup.h userspace visibility
2006-12-07 08:39:46 -08:00
[PATCH] irq-flags: POWERPC: Use the new IRQF_ constants
2006-07-02 13:58:47 -07:00
[POWERPC] Celleb: basic support
2007-02-07 14:03:21 +11:00
[POWERPC] powermac: Constify & voidify get_property()
2006-07-31 15:55:05 +10:00
[NET]: Adding SO_TIMESTAMPNS / SCM_TIMESTAMPNS support
2007-04-25 22:24:21 -07:00
[NET]: Introduce SIOCGSTAMPNS ioctl to get timestamps with nanosec resolution
2007-04-25 22:24:04 -07:00
[POWERPC] ps3: add lpar addressing
2006-12-04 20:40:52 +11:00
[PATCH] Directed yield: direct yield of spinlocks for powerpc
2006-10-01 00:39:22 -07:00
[POWERPC] Fix spu SLB invalidations
2007-03-10 00:07:50 +01:00
[POWERPC] spufs: make spu page faults not block scheduling
2007-04-23 21:18:55 +02:00
[POWERPC] spufs: Add /lslr, /dma_info and /proxydma files
2006-12-04 20:39:45 +11:00
[POWERPC] Celleb: consolidate spu management ops
2007-02-07 14:03:21 +11:00
[POWERPC] Added kprobes support to ppc32
2007-02-06 22:55:19 -06:00
[STRING]: Move strcasecmp/strncasecmp to lib/string.c
2007-04-26 01:54:39 -07:00
[POWERPC] Fix suspend states again
2007-05-02 20:04:30 +10:00
allow vmsplice to work in 32-bit mode on ppc64
2007-04-17 16:36:26 -07:00
Remove tas()
2007-05-08 11:15:20 -07:00
[POWERPC] Use 4kB iommu pages even on 64kB-page systems
2006-11-01 14:52:48 +11:00
[PATCH] tty: switch to ktermios
2006-12-08 08:28:57 -08:00
[PATCH] consolidate line discipline number definitions
2007-02-11 10:51:26 -08:00
[PATCH] PM: Fix SMP races in the freezer
2006-12-13 09:05:49 -08:00
[POWERPC] 8xx: powerpc port of core CPM PIC
2007-02-07 14:03:17 +11:00
[POWERPC] Cell timebase bug workaround
2006-10-25 11:54:18 +10:00
[POWERPC] Make tlb flush batch use lazy MMU mode
2007-04-13 04:09:38 +10:00
[POWERPC] Cleanup and fix breakage in tlbflush.h
2007-04-24 22:08:56 +10:00
[PATCH] sched: remove SMT nice
2007-03-05 07:57:51 -08:00
[POWERPC] Generalize tsi108 PCI setup
2007-05-08 11:54:20 +10:00
[POWERPC] Update mpc7448hpc2 board irq support using device tree
2006-08-23 15:51:18 +10:00
[POWERPC] Generalize tsi108 PCI setup
2007-05-08 11:54:20 +10:00
[PATCH] Centralise definitions of sector_t and blkcnt_t
2006-12-04 19:41:15 -08:00
[POWERPC] Add inatomic versions of __get_user and __put_user
2007-04-13 04:09:38 +10:00
[POWERPC] Add QUICC Engine (QE) infrastructure
2006-10-04 15:24:27 +10:00
ucc_geth: Implement Transmit on Demand support
2007-04-28 11:01:04 -04:00
[POWERPC] QE: clean up ucc_slow.c and ucc_fast.c
2007-02-17 16:12:54 -06:00
[POWERPC] Early serial debug support for PPC44x
2007-05-08 14:47:33 +10:00
[POWERPC] Add arch/powerpc driver for UIC, PPC4xx interrupt controller
2007-04-24 21:32:01 +10:00
[POWERPC] Wire up sys_epoll_pwait
2007-03-12 15:48:35 +11:00
[POWERPC] Fix vDSO page count calculation
2007-02-13 15:35:52 +11:00
[POWERPC] Refactor 64 bits DMA operations
2006-12-04 20:38:40 +11:00
[POWERPC] add support for stopping spus from xmon
2006-10-25 14:20:22 +10:00
d0f13e3c20