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* sh: page table alloc cleanups and page fault optimizations.Paul Mundt2006-09-277-102/+73
| | | | | | | | | | | Cleanup of page table allocators, using generic folded PMD and PUD helpers. TLB flushing operations are moved to a more sensible spot. The page fault handler is also optimized slightly, we no longer waste cycles on IRQ disabling for flushing of the page from the ITLB, since we're already under CLI protection by the initial exception handler. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: SH-4A Privileged Space Mapping Buffer (PMB) support.Paul Mundt2006-09-271-1/+47
| | | | | | | Add support for 32-bit physical addressing through the SH-4A Privileged Space Mapping Buffer (PMB). Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: Titan board support.Jamie Lenehan2006-09-271-0/+43
| | | | | | | Add support for the titan board. Signed-off-by: Jamie Lenehan <lenehan@twibble.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: Add control register barriers.Paul Mundt2006-09-272-13/+37
| | | | | | | | | | | | | | | | | | | | | | | Currently when making changes to control registers, we typically need some time for changes to take effect (8 nops, generally). However, for sh4a we simply need to do an icbi.. This is a simple patch for implementing a general purpose ctrl_barrier() which functions as a control register write barrier. There's some additional documentation in the patch itself, but it's pretty self explanatory. There were also some places where we were not doing the barrier, which didn't seem to have any adverse effects on legacy parts, but certainly did on sh4a. It's safer to have the barrier in place for legacy parts as well in these cases, though this does make flush_tlb_all() more expensive (by an order of 8 nops). We can ifdef around the flush_tlb_all() case for now if it's clear that all legacy parts won't have a problem with this. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: landisk board support.kogiidena2006-09-273-0/+137
| | | | | | | This adds support for the I-O DATA Landisk. Signed-off-by: kogiidena <kogiidena@eggplant.ddo.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: Fix libata build.Paul Mundt2006-09-272-9/+9
| | | | | | | | Drop virt_to_bus() from sg_dma_address() so libata builds. While we're at it, move sg_dma_address() and sg_dma_len() from pci.h to scatterlist.h. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: Fix fatal oops in copy_user_page() on sh4a (SH7780).Paul Mundt2006-09-271-4/+0
| | | | | | | | | | | | | | | | | We had a pretty interesting oops happening, where copy_user_page() was down()'ing p3map_sem[] with a bogus offset (particularly, an offset that hadn't been initialized with sema_init(), due to the mismatch between cpu_data->dcache.n_aliases and what was assumed based off of the old CACHE_ALIAS value). Luckily, spinlock debugging caught this for us, and so we drop the old hardcoded CACHE_ALIAS for sh4 completely and rely on the run-time probed cpu_data->dcache.alias_mask. This in turn gets the p3map_sem[] index right, and everything works again. While we're at it, also convert to 4-level page tables.. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: Wire up new syscalls.Paul Mundt2006-09-271-2/+24
| | | | | | The syscall table has lagged behind a bit, wire up the new ones.. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: remove cpu_online() definition from <asm/smp.h>Alexey Dobriyan2006-09-271-5/+0
| | | | | | | | It's defined in <linux/cpumask.h> and log is horribly flooded by "redefined" messages. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: Support for SH7770/SH7780 CPU subtypes.Paul Mundt2006-09-272-0/+6
| | | | | | Merge support for SH7770 and SH7780 SH-4A subtypes. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: earlyprintk= support and cleanups.Paul Mundt2006-09-271-0/+2
| | | | | | | | | | Allow multiple early printk consoles via earlyprintk=. With this change earlyprintk is no longer enabled by default, it must be specified on the kernel command line. Optionally with ,keep to prevent unreg by tty_io. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: prefetch()/prefetchw() support.Paul Mundt2006-09-271-0/+13
| | | | | | SH-2/3/4 are able to prefetch, add support for it.. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: Optimized cache handling for SH-4/SH-4A caches.Richard Curnow2006-09-271-4/+18
| | | | | | | | | This reworks some of the SH-4 cache handling code to more easily accomodate newer-style caches (particularly for the > direct-mapped case), as well as optimizing some of the old code. Signed-off-by: Richard Curnow <richard.curnow@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: Support for SH-4A memory barriers.Paul Mundt2006-09-271-0/+7
| | | | | | | SH-4A supports 'synco' as a barrier, sprinkle it around the cache ops as necessary.. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: HS7751RVoIP board updates.Paul Mundt2006-09-271-0/+6
| | | | | | | | Various cleanups for HS7751RVoIP. Mostly just getting rid of the old mach.c and splitting codec configuration in to its own Kconfig. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: Move hd64461.h to a more sensible location.Paul Mundt2006-09-273-68/+26
| | | | | | | With the I/O rework for hd64461 we're down to a single header, so move it by itself and get rid of the directory. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: Fixup TMU_TOCR definition for SH7300.Paul Mundt2006-09-271-3/+4
| | | | | | SH7300 has a different TMU_TOCR, make the TMU code work again. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: hugetlb updates.Paul Mundt2006-09-271-1/+0
| | | | | | | | | For some of the larger sizes we permitted spanning pages across several PTEs, but this turned out to not be generally useful. This reverts the sh hugetlbpage interface to something more sensible using huge pages at single PTE granularity. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: Various cosmetic cleanups.Paul Mundt2006-09-275-12/+12
| | | | | | | | We had quite a bit of whitespace damage, clean most of it up.. Signed-off-by: Stuart Menefy <stuart.menefy@st.com> Signed-off-by: Arthur Othieno <a.othieno@bluewin.ch> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: Add a simple cmpxchg().Tom Rini2006-09-271-0/+40
| | | | | | | | We didn't have one of these before, a simple implementation borrowed from MIPS as well as the __HAVE_ARCH_CMPXCHG bits. Signed-off-by: Tom Rini <trini@kernel.crashing.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: Move smc37c93x.h for SystemH board use.Paul Mundt2006-09-271-0/+0
| | | | | | SystemH needs this header as well, not just 770x SE. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6Linus Torvalds2006-09-2685-777/+879
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6: (225 commits) [PATCH] Don't set calgary iommu as default y [PATCH] i386/x86-64: New Intel feature flags [PATCH] x86: Add a cumulative thermal throttle event counter. [PATCH] i386: Make the jiffies compares use the 64bit safe macros. [PATCH] x86: Refactor thermal throttle processing [PATCH] Add 64bit jiffies compares (for use with get_jiffies_64) [PATCH] Fix unwinder warning in traps.c [PATCH] x86: Allow disabling early pci scans with pci=noearly or disallowing conf1 [PATCH] x86: Move direct PCI scanning functions out of line [PATCH] i386/x86-64: Make all early PCI scans dependent on CONFIG_PCI [PATCH] Don't leak NT bit into next task [PATCH] i386/x86-64: Work around gcc bug with noreturn functions in unwinder [PATCH] Fix some broken white space in ia32_signal.c [PATCH] Initialize argument registers for 32bit signal handlers. [PATCH] Remove all traces of signal number conversion [PATCH] Don't synchronize time reading on single core AMD systems [PATCH] Remove outdated comment in x86-64 mmconfig code [PATCH] Use string instructions for Core2 copy/clear [PATCH] x86: - restore i8259A eoi status on resume [PATCH] i386: Split multi-line printk in oops output. ...
| * [PATCH] x86: Add a cumulative thermal throttle event counter.Dmitriy Zavin2006-09-261-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | The counter is exported to /sys that keeps track of the number of thermal events, such that the user knows how bad the thermal problem might be (since the logging to syslog and mcelog is rate limited). AK: Fixed cpu hotplug locking Signed-off-by: Dmitriy Zavin <dmitriyz@google.com> Signed-off-by: Andi Kleen <ak@suse.de>
| * [PATCH] x86: Refactor thermal throttle processingDmitriy Zavin2006-09-263-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Refactor the event processing (syslog messaging and rate limiting) into separate file therm_throt.c. This allows consistent reporting of CPU thermal throttle events. After ACK'ing the interrupt, if the event is current, the user (p4.c/mce_intel.c) calls therm_throt_process to log (and rate limit) the event. If that function returns 1, the user has the option to log things further (such as to mce_log in x86_64). AK: minor cleanup Signed-off-by: Dmitriy Zavin <dmitriyz@google.com> Signed-off-by: Andi Kleen <ak@suse.de>
| * [PATCH] Add 64bit jiffies compares (for use with get_jiffies_64)Dmitriy Zavin2006-09-261-0/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The current time_before/time_after macros will fail typechecks when passed u64 values (as returned by get_jiffies_64()). On 64bit systems, this will just result in a warning about mismatching types without explicit casts, but since unsigned long and u64 (unsigned long long) are of same size, it will still work. On 32bit systems, a long is 32bits, so the value from get_jiffies_64() will be truncated by the cast and thus lose all the precision gained by 64bit jiffies. Signed-off-by: Dmitriy Zavin <dmitriyz@google.com> Signed-off-by: Andi Kleen <ak@suse.de>
| * [PATCH] Fix unwinder warning in traps.cAndi Kleen2006-09-261-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | Fix linux/arch/x86_64/kernel/traps.c: In function 'dump_trace': linux/arch/x86_64/kernel/traps.c:275: warning: cast to pointer from integer of different size with allnoconfig Cc: jbeulich@novell.com Signed-off-by: Andi Kleen <ak@suse.de>
| * [PATCH] x86: Allow disabling early pci scans with pci=noearly or disallowing ↵Andi Kleen2006-09-261-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | conf1 Some buggy systems can machine check when config space accesses happen for some non existent devices. i386/x86-64 do some early device scans that might trigger this. Allow pci=noearly to disable this. Also when type 1 is disabling also don't do any early accesses which are always type1. This moves the pci= configuration parsing to be a early parameter. I don't think this can break anything because it only changes a single global that is only used by PCI. Cc: gregkh@suse.de Cc: Trammell Hudson <hudson@osresearch.net> Signed-off-by: Andi Kleen <ak@suse.de>
| * [PATCH] x86: Move direct PCI scanning functions out of lineAndi Kleen2006-09-261-38/+4
| | | | | | | | | | | | Saves about 200 bytes of code space. Signed-off-by: Andi Kleen <ak@suse.de>
| * [PATCH] Don't leak NT bit into next taskAndi Kleen2006-09-261-2/+3
| | | | | | | | | | | | | | | | | | SYSENTER can cause a NT to be set which might cause crashes on the IRET in the next task. Following similar i386 patch from Linus. Signed-off-by: Andi Kleen <ak@suse.de>
| * [PATCH] i386/x86-64: Work around gcc bug with noreturn functions in unwinderJan Beulich2006-09-264-0/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Current gcc generates calls not jumps to noreturn functions. When that happens the return address can point to the next function, which confuses the unwinder. This patch works around it by marking asynchronous exception frames in contrast normal call frames in the unwind information. Then teach the unwinder to decode this. For normal call frames the unwinder now subtracts one from the address which avoids this problem. The standard libgcc unwinder uses the same trick. It doesn't include adjustment of the printed address (i.e. for the original example, it'd still be kernel_math_error+0 that gets displayed, but the unwinder wouldn't get confused anymore. This only works with binutils 2.6.17+ and some versions of H.J.Lu's 2.6.16 unfortunately because earlier binutils don't support .cfi_signal_frame [AK: added automatic detection of the new binutils and wrote description] Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de>
| * [PATCH] i386: Fix pack_descriptor()Jeremy Fitzhardinge2006-09-261-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix pack_descriptor: 1. flags are bits 20-23 in the high word 2. limit's 4 msb are bits 16-19 in the high word These haven't mattered so far, because all users have had small limits and a flags setting of 0. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> ===================================================================
| * [PATCH] Fix idle notifiersAndi Kleen2006-09-261-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Previously exit_idle would be called more often than enter_idle Now instead of using complicated tests just keep track of it using the per CPU variable as a flip flop. I moved the idle state into the PDA to make the access more efficient. Original bug report and an initial patch from Stephane Eranian, but redone by AK. Cc: Stephane Eranian <eranian@hpl.hp.com> Signed-off-by: Andi Kleen <ak@suse.de>
| * [PATCH] Remove unused asm-x86_64/mmx.hAndi Kleen2006-09-261-14/+0
| | | | | | | | Signed-off-by: Andi Kleen <ak@suse.de>
| * [PATCH] Define __bad_pda_field as noreturnAndi Kleen2006-09-261-1/+1
| | | | | | | | | | | | This quietens so warnings about uninitialized use of the return value of the pda read operations. Signed-off-by: Andi Kleen <ak@suse.de>
| * [PATCH] Reindent macros in pda.hAndi Kleen2006-09-261-32/+53
| | | | | | | | | | | | | | | | | | Reindent the macros in x86-64 pda.h, making them much more readable. Follows Jeremy's i386 version of this. No functional changes Signed-off-by: Andi Kleen <ak@suse.de>
| * [PATCH] Fix some stylistic issues in uaccess.hAndi Kleen2006-09-261-10/+10
| | | | | | | | | | | | | | | | | | - Replace some broken white space. - Replace __ keywords with standard names No functional changes. Signed-off-by: Andi Kleen <ak@suse.de>
| * [PATCH] Add __must_check to copy_*_userAndi Kleen2006-09-262-21/+29
| | | | | | | | | | | | | | | | Following i386. And also fix the two occurrences that caused warnings in arch/x86_64/* Signed-off-by: Andi Kleen <ak@suse.de>
| * [PATCH] Fix zeroing on exception in copy_*_userAndi Kleen2006-09-261-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | - Don't zero for __copy_from_user_inatomic following i386. This will prevent spurious zeros for parallel file system writers when one does a exception - The string instruction version didn't zero the output on exception. Oops. Also I cleaned up the code a bit while I was at it and added a minor optimization to the string instruction path. Signed-off-by: Andi Kleen <ak@suse.de>
| * [PATCH] i386: Allow a kernel not to be in ring 0Rusty Russell2006-09-262-2/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We allow for the fact that the guest kernel may not run in ring 0. This requires some abstraction in a few places when setting %cs or checking privilege level (user vs kernel). This is Chris' [RFC PATCH 15/33] move segment checks to subarch, except rather than using #define USER_MODE_MASK which depends on a config option, we use Zach's more flexible approach of assuming ring 3 == userspace. I also used "get_kernel_rpl()" over "get_kernel_cs()" because I think it reads better in the code... 1) Remove the hardcoded 3 and introduce #define SEGMENT_RPL_MASK 3 2) Add a get_kernel_rpl() macro, and don't assume it's zero. And: Clean up of patch for letting kernel run other than ring 0: a. Add some comments about the SEGMENT_IS_*_CODE() macros. b. Add a USER_RPL macro. (Code was comparing a value to a mask in some places and to the magic number 3 in other places.) c. Add macros for table indicator field and use them. d. Change the entry.S tests for LDT stack segment to use the macros Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Zachary Amsden <zach@vmware.com> Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Andi Kleen <ak@suse.de>
| * [PATCH] i386: Abstract sensitive instructionsRusty Russell2006-09-261-2/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Abstract sensitive instructions in assembler code, replacing them with macros (which currently are #defined to the native versions). We use long names: assembler is case-insensitive, so if something goes wrong and macros do not expand, it would assemble anyway. Resulting object files are exactly the same as before. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Andi Kleen <ak@suse.de>
| * [PATCH] Type checking for write_pda()Jeremy Fitzhardinge2006-09-261-1/+2
| | | | | | | | | | | | | | | | | | I just added type checking for assignments the PDA in the i386 PDA code. Here's the x86-64 equivalent. (Obviously this doesn't contain the latest x86-64 PDA change.) Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Andi Kleen <ak@suse.de>
| * [PATCH] Use %c instead of %P modifier in pda accessAndi Kleen2006-09-261-6/+6
| | | | | | | | | | | | | | Apparently that is the more official way to get numbers without $ in inline assembly Signed-off-by: Andi Kleen <ak@suse.de>
| * [PATCH] Add the canary field to the PDA area and the task structArjan van de Ven2006-09-262-1/+11
| | | | | | | | | | | | | | | | | | | | | | This patch adds the per thread cookie field to the task struct and the PDA. Also it makes sure that the PDA value gets the new cookie value at context switch, and that a new task gets a new cookie at task creation time. Signed-off-by: Arjan van Ven <arjan@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andi Kleen <ak@suse.de> CC: Andi Kleen <ak@suse.de>
| * [PATCH] Add comments to the PDA structure to annotate offsetsArjan van de Ven2006-09-261-7/+8
| | | | | | | | | | | | | | | | | | | | | | | | Change the comments in the pda structure to make the first fields to have their offset documented and to have the comments aligned. The stack protector series needs a field at offset 40 (gcc ABI); annotate upto 40 for that reason. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andi Kleen <ak@suse.de> CC: Andi Kleen <ak@suse.de>
| * [PATCH] i386: Avoid overwriting the current pgd (V4, i386)Magnus Damm2006-09-261-0/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | kexec: Avoid overwriting the current pgd (V4, i386) This patch upgrades the i386-specific kexec code to avoid overwriting the current pgd. Overwriting the current pgd is bad when CONFIG_CRASH_DUMP is used to start a secondary kernel that dumps the memory of the previous kernel. The code introduces a new set of page tables. These tables are used to provide an executable identity mapping without overwriting the current pgd. Signed-off-by: Magnus Damm <magnus@valinux.co.jp> Signed-off-by: Andi Kleen <ak@suse.de>
| * [PATCH] Avoid overwriting the current pgd (V4, x86_64)Magnus Damm2006-09-261-0/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | kexec: Avoid overwriting the current pgd (V4, x86_64) This patch upgrades the x86_64-specific kexec code to avoid overwriting the current pgd. Overwriting the current pgd is bad when CONFIG_CRASH_DUMP is used to start a secondary kernel that dumps the memory of the previous kernel. The code introduces a new set of page tables. These tables are used to provide an executable identity mapping without overwriting the current pgd. Signed-off-by: Magnus Damm <magnus@valinux.co.jp> Signed-off-by: Andi Kleen <ak@suse.de>
| * [PATCH] Remove most of the special cases for the debug IST stackKeith Owens2006-09-261-3/+0
| | | | | | | | | | | | | | | | | | Remove most of the special cases for the debug IST stack. This is a follow on clean up patch, it requires the bug fix patch that adds orig_ist. Signed-off-by: Keith Owens <kaos@ocs.com.au> Signed-off-by: Andi Kleen <ak@suse.de>
| * [PATCH] i386: Fix the EDD code misparsing the command lineH. Peter Anvin2006-09-261-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | The EDD code would scan the command line as a fixed array, without taking account of either whitespace, null-termination, the old command-line protocol, late overrides early, or the fact that the command line may not be reachable from INITSEG. This should fix those problems, and enable us to use a longer command line. Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Andi Kleen <ak@suse.de>
| * [PATCH] Optimize PDA accesses slightlyAndi Kleen2006-09-261-19/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Based on a idea by Jeremy Fitzhardinge: Replace the volatiles and memory clobbers in the PDA access with telling gcc about access to a proxy PDA structure that doesn't actually exist. But the dummy accesses give a defined ordering for read/write accesses. Also add some memory barriers to the early GS initialization to make sure no PDA access is moved before it. Advantage is some .text savings (probably most from better code for accessing "current"): text data bss dec hex filename 4845647 1223688 615864 6685199 66020f vmlinux 4837780 1223688 615864 6677332 65e354 vmlinux-pda 1.2% smaller code Cc: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Andi Kleen <ak@suse.de>
| * [PATCH] x86: Remove incorrect comment about ACPI e820 entriesAndi Kleen2006-09-262-2/+2
| | | | | | | | | | | | | | They cannot be actually freed because the FACS table has a shared-with-the-BIOS lock. Signed-off-by: Andi Kleen <ak@suse.de>
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