linux-toradex.git/arch/ia64/kernel/ivt.S, branch v3.4.59

Disintegrate asm/system.h for IA64

2012-03-28T17:30:02+00:00

Disintegrate asm/system.h for IA64.

Signed-off-by: David Howells 
Acked-by: Tony Luck 
cc: linux-ia64@vger.kernel.org

Merge branch 'for-35' of git://repo.or.cz/linux-kbuild

2010-06-01T15:55:52+00:00

* 'for-35' of git://repo.or.cz/linux-kbuild: (81 commits)
  kbuild: Revert part of e8d400a to resolve a conflict
  kbuild: Fix checking of scm-identifier variable
  gconfig: add support to show hidden options that have prompts
  menuconfig: add support to show hidden options which have prompts
  gconfig: remove show_debug option
  gconfig: remove dbg_print_ptype() and dbg_print_stype()
  kconfig: fix zconfdump()
  kconfig: some small fixes
  add random binaries to .gitignore
  kbuild: Include gen_initramfs_list.sh and the file list in the .d file
  kconfig: recalc symbol value before showing search results
  .gitignore: ignore *.lzo files
  headerdep: perlcritic warning
  scripts/Makefile.lib: Align the output of LZO
  kbuild: Generate modules.builtin in make modules_install
  Revert "kbuild: specify absolute paths for cscope"
  kbuild: Do not unnecessarily regenerate modules.builtin
  headers_install: use local file handles
  headers_check: fix perl warnings
  export_report: fix perl warnings
  ...

Rename .text.ivt to .text..ivt.

2010-03-03T10:26:00+00:00

Signed-off-by: Denys Vlasenko 
Signed-off-by: Michal Marek

[IA64] Remove COMPAT_IA32 support

2010-02-08T18:42:17+00:00

This has been broken since May 2008 when Al Viro killed altroot support.
Since nobody has complained, it would appear that there are no users of
this code (A plausible theory since the main OSVs that support ia64 prefer
to use the IA32-EL software emulation).

Signed-off-by: Tony Luck

ia64/pv_ops: paravirtualize mov = ar.itc.

2009-03-26T17:50:22+00:00

paravirtualize mov reg = ar.itc.

Signed-off-by: Isaku Yamahata 
Signed-off-by: Tony Luck

ia64/pv_ops: fix paravirtualization of ivt.S with CONFIG_SMP=n

2008-10-17T16:50:09+00:00

When CONFIG_SMP=n, three instruction in ivt.S were missed to paravirtualize.
paravirtualize them.

Signed-off-by: Isaku Yamahata 
Signed-off-by: Tony Luck

[IA64] pv_ops: fix ivt.S paravirtualization

2008-08-04T17:52:12+00:00

Recent kernels are not booting on some HP systems (though
it does boot on others). James and Willy reported the
problem.  James did the bisection to find the commit
that caused the problem:
	498c5170472ff0c03a29d22dbd33225a0be038f4.
	[IA64] pvops: paravirtualize ivt.S

Two instructions were wrongly paravirtualized such that
_FROM_ macro had been used where _TO_ was intended

Cc: James Bottomley 
Cc: "Wilcox, Matthew  R" 
Signed-off-by: Isaku Yamahata 
Signed-off-by: Tony Luck

[IA64] pv_ops: move some functions in ivt.S to avoid lack of space.

2008-05-28T16:41:58+00:00

move interrupt, page_fault, non_syscall, dispatch_unaligned_handler and
dispatch_to_fault_handler to avoid lack of instructin space.
The change set 4dcc29e1574d88f4465ba865ed82800032f76418 bloated
SAVE_MIN_WITH_COVER, SAVE_MIN_WITH_COVER_R19 so that it bloated the
functions which uses those macros.
In the native case, only dispatch_illegal_op_fault had to be moved.
When paravirtualized case the all functions which use the macros need
to be moved to avoid the lack of space.

Signed-off-by: Isaku Yamahata 
Signed-off-by: Tony Luck

[IA64] pvops: paravirtualize ivt.S

2008-05-27T22:03:29+00:00

paravirtualize ivt.S which implements fault handler in hand written
assembly code.
They includes sensitive or performance critical privileged instructions.
So they need paravirtualization.

Cc: Keith Owens 
Cc: tgingold@free.fr
Cc: Akio Takebe 
Signed-off-by: Yaozu (Eddie) Dong 
Signed-off-by: Isaku Yamahata 
Signed-off-by: Tony Luck

[IA64] Workaround for RSE issue

2008-05-27T20:24:39+00:00

Problem: An application violating the architectural rules regarding
operation dependencies and having specific Register Stack Engine (RSE)
state at the time of the violation, may result in an illegal operation
fault and invalid RSE state.  Such faults may initiate a cascade of
repeated illegal operation faults within OS interruption handlers.
The specific behavior is OS dependent.

Implication: An application causing an illegal operation fault with
specific RSE state may result in a series of illegal operation faults
and an eventual OS stack overflow condition.

Workaround: OS interruption handlers that switch to kernel backing
store implement a check for invalid RSE state to avoid the series
of illegal operation faults.

The core of the workaround is the RSE_WORKAROUND code sequence
inserted into each invocation of the SAVE_MIN_WITH_COVER and
SAVE_MIN_WITH_COVER_R19 macros.  This sequence includes hard-coded
constants that depend on the number of stacked physical registers
being 96.  The rest of this patch consists of code to disable this
workaround should this not be the case (with the presumption that
if a future Itanium processor increases the number of registers, it
would also remove the need for this patch).

Move the start of the RBS up to a mod32 boundary to avoid some
corner cases.

The dispatch_illegal_op_fault code outgrew the spot it was
squatting in when built with this patch and CONFIG_VIRT_CPU_ACCOUNTING=y
Move it out to the end of the ivt.

Signed-off-by: Tony Luck