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Martin Schwidefsky 2f569afd9c CONFIG_HIGHPTE vs. sub-page page tables. ... Background: I've implemented 1K/2K page tables for s390. These sub-page page tables are required to properly support the s390 virtualization instruction with KVM. The SIE instruction requires that the page tables have 256 page table entries (pte) followed by 256 page status table entries (pgste). The pgstes are only required if the process is using the SIE instruction. The pgstes are updated by the hardware and by the hypervisor for a number of reasons, one of them is dirty and reference bit tracking. To avoid wasting memory the standard pte table allocation should return 1K/2K (31/64 bit) and 2K/4K if the process is using SIE. Problem: Page size on s390 is 4K, page table size is 1K or 2K. That means the s390 version for pte_alloc_one cannot return a pointer to a struct page. Trouble is that with the CONFIG_HIGHPTE feature on x86 pte_alloc_one cannot return a pointer to a pte either, since that would require more than 32 bit for the return value of pte_alloc_one (and the pte * would not be accessible since its not kmapped). Solution: The only solution I found to this dilemma is a new typedef: a pgtable_t. For s390 pgtable_t will be a (pte *) - to be introduced with a later patch. For everybody else it will be a (struct page *). The additional problem with the initialization of the ptl lock and the NR_PAGETABLE accounting is solved with a constructor pgtable_page_ctor and a destructor pgtable_page_dtor. The page table allocation and free functions need to call these two whenever a page table page is allocated or freed. pmd_populate will get a pgtable_t instead of a struct page pointer. To get the pgtable_t back from a pmd entry that has been installed with pmd_populate a new function pmd_pgtable is added. It replaces the pmd_page call in free_pte_range and apply_to_pte_range. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		17 years ago
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dec	…
emma2rh	…
fw	[MIPS] CFE: Make code remotely resemble Linux code.	17 years ago
ip32	[MIPS] IP32: More interrupt renumbering fixes.	17 years ago
jmr3927	[MIPS] txx9tmr clockevent/clocksource driver	17 years ago
lasat	[MIPS] Lasat: Fix overlap of interrupt number ranges.	17 years ago
mach-atlas	…
mach-au1x00	au1xxx-ide: use hwif->dev	17 years ago
mach-bcm47xx	[MIPS] Deforest the function pointer jungle in the time code.	18 years ago
mach-cobalt	[MIPS] remove unneeded button check for reset	17 years ago
mach-db1x00	[MIPS] Alchemy: Renumber interrupts so irq_cpu can work.	17 years ago
mach-dec	[MIPS] Split up war.h	18 years ago
mach-emma2rh	[MIPS] Split up war.h	18 years ago
mach-excite	include/asm-mips/: Spelling fixes	17 years ago
mach-generic	[MIPS] Fix and cleanup the MIPS part of the (ab)use of CLOCK_TICK_RATE.	17 years ago
mach-ip22	[MIPS] Split up war.h	18 years ago
mach-ip27	[MIPS] Always do the ARC64_TWIDDLE_PC thing.	17 years ago
mach-ip28	[MIPS] IP28 support	17 years ago
mach-ip32	[MIPS] checkfiles: Fix "need space after that ','" errors.	18 years ago
mach-jazz	[MIPS] Fix and cleanup the MIPS part of the (ab)use of CLOCK_TICK_RATE.	17 years ago
mach-jmr3927	[MIPS] checkfiles: Fix "need space after that ','" errors.	18 years ago
mach-lasat	[MIPS] Lasat: Fix overlap of interrupt number ranges.	17 years ago
mach-lemote	[MIPS] Split up war.h	18 years ago
mach-mips	[MIPS] Split up war.h	18 years ago
mach-mipssim	[MIPS] Split up war.h	18 years ago
mach-pb1x00	[MIPS] Alchemy: Renumber interrupts so irq_cpu can work.	17 years ago
mach-pnx8550	[MIPS] checkfiles: Fix "need space after that ','" errors.	18 years ago
mach-rm	[MIPS] Fix and cleanup the MIPS part of the (ab)use of CLOCK_TICK_RATE.	17 years ago
mach-sibyte	[MIPS] Split up war.h	18 years ago
mach-tx49xx	[MIPS] Split up war.h	18 years ago
mach-vr41xx	[MIPS] Split up war.h	18 years ago
mach-wrppmc	include/asm-mips/: Spelling fixes	17 years ago
mach-yosemite	[MIPS] Split up war.h	18 years ago
mips-boards	[MIPS] Malta, Atlas: move an extern function declaration to the header file	17 years ago
pci	Fix misspellings of "system", "controller", "interrupt" and "necessary".	17 years ago
pmc-sierra/msp71xx	[MIPS] Delete CONFIG_MSP_FPGA	17 years ago
sgi	include/asm-mips/: Spelling fixes	17 years ago
sibyte	[MIPS] Remove CONFIG_SIBYTE_PT{1120,1125,SWARM}	17 years ago
sn	include/asm-mips/: Spelling fixes	17 years ago
tx4927	[MIPS] TXx9 watchdog support for rbhma3100,rbhma4200,rbhma4500	17 years ago
tx4938	[MIPS] txx9tmr clockevent/clocksource driver	17 years ago
vr41xx	…
xtalk	[MIPS] checkfiles: Fix "need space after that ','" errors.	18 years ago
Kbuild	…
a.out.h	aout: move STACK_TOP[_MAX] to asm/processor.h	17 years ago
abi.h	…
addrspace.h	[MIPS] Put cast inside macro instead of all the callers	17 years ago
asm.h	[MIPS] IP28: added cache barrier to assembly routines	17 years ago
asmmacro-32.h	…
asmmacro-64.h	…
asmmacro.h	[MIPS] Fix "no space between function name and open parenthesis" warnings.	18 years ago
atomic.h	[MIPS] checkfiles: Fix "need space after that ','" errors.	18 years ago
auxvec.h	…
barrier.h	[MIPS] Make support for weakly ordered LL/SC a config option.	18 years ago
bcache.h	[MIPS] SNI: remove unused pcimt_scache.c	18 years ago
bitops.h	forbid asm/bitops.h direct inclusion	17 years ago
bootinfo.h	[MIPS] RM: Collected changes	17 years ago
branch.h	…
break.h	…
bug.h	…
bugs.h	[MIPS] R4000/R4400 errata workarounds	17 years ago
byteorder.h	[MIPS] Fix "no space between function name and open parenthesis" warnings.	18 years ago
cache.h	…
cachectl.h	…
cacheflush.h	…
cacheops.h	[MIPS] Cacheops.h: Fix typo.	17 years ago
checksum.h	…
cmpxchg.h	Add cmpxchg64 and cmpxchg64_local to mips	17 years ago
compat-signal.h	…
compat.h	asm-*/compat.h: fix typo in comment	17 years ago
compiler.h	[MIPS] cpu-bugs64.c: GCC 3.3 constraint workaround	18 years ago
cpu-features.h	[MIPS] Fix use of smp_processor_id() in preemptible code.	17 years ago
cpu-info.h	[MIPS] MT: Scheduler support for SMT	17 years ago
cpu.h	[MIPS] Alchemy: Au1210/Au1250 CPU support	17 years ago
cputime.h	…
current.h	…
debug.h	…
delay.h	[MIPS] R4000/R4400 daddiu erratum workaround	17 years ago
device.h	…
div64.h	…
dma-mapping.h	…
dma.h	[MIPS] IP28 support	17 years ago
ds1286.h	…
dsp.h	…
edac.h	[MIPS] Polish <asm/edac.h>.	18 years ago
elf.h	Cleanup asm/{elf,page,user}.h: #ifdef __KERNEL__ is no longer needed	17 years ago
emergency-restart.h	…
errno.h	…
fb.h	…
fcntl.h	[MIPS] Fix value of O_TRUNC	18 years ago
fixmap.h	[MIPS] fixmap: delete unused __set_fixmap, set_fixmap and set_fixmap_nocache	17 years ago
floppy.h	cleanup floppy.h	17 years ago
fpregdef.h	…
fpu.h	remove asm/bitops.h includes	17 years ago
fpu_emulator.h	…
futex.h	[MIPS] Fix possible hang in LL/SC futex loops.	17 years ago
gdb-stub.h	…
gpio.h	…
gt64120.h	[MIPS] time: Add GT641xx timer0 clockevent driver	17 years ago
hardirq.h	…
hazards.h	[MIPS] R1: Fix hazard barriers to make kernels work on R2 also.	18 years ago
highmem.h	…
hw_irq.h	[MIPS] i8295 cleanups.	18 years ago
i8253.h	[MIPS] Fix pcspeaker build.	17 years ago
i8259.h	[MIPS] i8295 cleanups.	18 years ago
ide.h	…
inst.h	…
inventory.h	[MIPS] Fix "no space between function name and open parenthesis" warnings.	18 years ago
io.h	Remove dma_cache_(wback|inv|wback_inv) functions	17 years ago
ioctl.h	[MIPS] checkfiles: Fix "need space after that ','" errors.	18 years ago
ioctls.h	[MIPS] checkfiles: Fix "need space after that ','" errors.	18 years ago
ipcbuf.h	…
irq.h	[MIPS] IRQ Affinity Support for SMTC on Malta Platform	18 years ago
irq_cpu.h	…
irq_gt641xx.h	[MIPS] Add GT641xx IRQ routines.	18 years ago
irq_regs.h	…
irqflags.h	[MIPS] Fix "no space between function name and open parenthesis" warnings.	18 years ago
isadep.h	…
jazz.h	[MIPS] JAZZ fixes	18 years ago
jazzdma.h	[MIPS] JAZZ fixes	18 years ago
kdebug.h	…
kexec.h	…
kmap_types.h	…
kspd.h	…
linkage.h	[MIPS] Sibyte: Replace SB1 cachecode with standard R4000 class cache code.	18 years ago
local.h	[MIPS] checkfiles: Fix "need space after that ','" errors.	18 years ago
m48t35.h	…
m48t37.h	…
mc146818-time.h	[MIPS] checkfiles: Fix "need space after that ','" errors.	18 years ago
mc146818rtc.h	…
mips_mt.h	[MIPS] MT: Enable coexistence of AP/SP with VSMP and SMTC.	18 years ago
mipsmtregs.h	[MIPS] checkfiles: Fix "need space after that ','" errors.	18 years ago
mipsprom.h	[MIPS] RM: Collected changes	17 years ago
mipsregs.h	[MIPS] checkfiles: Fix "need space after that ','" errors.	18 years ago
mman.h	…
mmu.h	…
mmu_context.h	[MIPS] Kill num_online_cpus() loops.	18 years ago
mmzone.h	…
module.h	…
msc01_ic.h	…
msgbuf.h	…
mutex.h	…
namei.h	…
nile4.h	[MIPS] Add back support for LASAT platforms	18 years ago
paccess.h	[MIPS] checkfiles: Fix "need space after that ','" errors.	18 years ago
page.h	CONFIG_HIGHPTE vs. sub-page page tables.	17 years ago
param.h	…
parport.h	[MIPS] Fix "no space between function name and open parenthesis" warnings.	18 years ago
pci.h	[MIPS] PCI: Always enable CONFIG_PCI_DOMAINS	18 years ago
percpu.h	…
pgalloc.h	CONFIG_HIGHPTE vs. sub-page page tables.	17 years ago
pgtable-32.h	[MIPS] checkfiles: Fix "need space after that ','" errors.	18 years ago
pgtable-64.h	[MIPS] checkfiles: Fix "need space after that ','" errors.	18 years ago
pgtable-bits.h	…
pgtable.h	[MIPS] checkfiles: Fix "need space after that ','" errors.	18 years ago
pmon.h	[MIPS] PMON: Fix cpustart declaration.	18 years ago
poll.h	…
posix_types.h	asm-*/posix_types.h: scrub __GLIBC__	17 years ago
prctl.h	[MIPS] Fix "no space between function name and open parenthesis" warnings.	18 years ago
prefetch.h	…
processor.h	aout: move STACK_TOP[_MAX] to asm/processor.h	17 years ago
ptrace.h	[MIPS] IP22: Fix warning.	17 years ago
qemu.h	[MIPS] Implement clockevents for R4000-style cp0 count/compare interrupt	18 years ago
r4kcache.h	[MIPS] Use real cache invalidate	17 years ago
reboot.h	…
reg.h	…
regdef.h	…
resource.h	…
rm9k-ocd.h	…
rtlx.h	…
scatterlist.h	Add CONFIG_DEBUG_SG sg validation	17 years ago
seccomp.h	[MIPS] Fixup secure computing stuff.	18 years ago
sections.h	…
segment.h	…
semaphore.h	kill DECLARE_MUTEX_LOCKED	17 years ago
sembuf.h	…
serial.h	…
setup.h	…
sgialib.h	…
sgiarcs.h	[MIPS] checkfiles: Fix "need space after that ','" errors.	18 years ago
sgidefs.h	…
shmbuf.h	…
shmparam.h	…
sigcontext.h	…
siginfo.h	[MIPS] checkfiles: Fix "need space after that ','" errors.	18 years ago
signal.h	…
sim.h	[MIPS] Fix "no space between function name and open parenthesis" warnings.	18 years ago
smp-ops.h	[MIPS] SMP: Call platform methods via ops structure.	17 years ago
smp.h	[MIPS] SMP: Call platform methods via ops structure.	17 years ago
smtc.h	[MIPS] SMTC: Move MIPS_CPU_IPI_IRQ definition into header.	18 years ago
smtc_ipi.h	[MIPS] SMTC: Fix build error.	17 years ago
smtc_proc.h	…
sni.h	[MIPS] RM: Collected changes	17 years ago
socket.h	[NET]: Introducing socket mark socket option.	17 years ago
sockios.h	…
sparsemem.h	…
spinlock.h	[MIPS] Make support for weakly ordered LL/SC a config option.	18 years ago
spinlock_types.h	…
stackframe.h	[MIPS] R4000/R4400 daddiu erratum workaround	17 years ago
stacktrace.h	[MIPS] unwind_stack should return a value ...	18 years ago
stat.h	…
statfs.h	…
string.h	…
suspend.h	…
sysmips.h	…
system.h	IP22ZILOG: fix lockup and sysrq	17 years ago
termbits.h	[MIPS] tty: add the new ioctls and definitions.	18 years ago
termios.h	[MIPS] tty: add the new ioctls and definitions.	18 years ago
thread_info.h	Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus	18 years ago
time.h	[MIPS] time: remove unused mips_timer_state()	17 years ago
timex.h	[MIPS] Change get_cycles to always return 0.	17 years ago
titan_dep.h	…
tlb.h	…
tlbdebug.h	…
tlbflush.h	remove unused flush_tlb_pgtables	17 years ago
topology.h	[MIPS] MT: Scheduler support for SMT	17 years ago
traps.h	…
txx9irq.h	[MIPS] The irq_chip for TX39/TX49 SoCs	18 years ago
txx9tmr.h	[MIPS] txx9tmr clockevent/clocksource driver	17 years ago
types.h	remove strict ansi check from __u64 in asm/types.h	17 years ago
uaccess.h	[MIPS] R4000/R4400 daddiu erratum workaround	17 years ago
ucontext.h	…
unaligned.h	[MIPS] Optimize get_unaligned / put_unaligned implementations.	18 years ago
unistd.h	[MIPS] Wire up the fallocate syscall.	18 years ago
user.h	Sanitize the type of struct user.u_ar0	17 years ago
vga.h	[MIPS] checkfiles: Fix "need space after that ','" errors.	18 years ago
vpe.h	…
war.h	[MIPS] R4000/R4400 errata workarounds	17 years ago
wbflush.h	…
xor.h	…