- 26 Sep, 2006 40 commits
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Andi Kleen authored
This is useful on systems with broken PCI bus. Affects various scans in x86-64 and i386's early ACPI quirk scan. Cc: gregkh@suse.de Cc: len.brown@intel.com Cc: Trammell Hudson <hudson@osresearch.net> Signed-off-by:Andi Kleen <ak@suse.de>
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Andi Kleen authored
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: -
Jan Beulich authored
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:
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Andi Kleen authored
No functional changes Signed-off-by: -
Andi Kleen authored
In case the user space was compiled with -mregparm=3 Following i386. Pointed out by Albert Cahalan Signed-off-by: -
Andi Kleen authored
This was old code that was needed for iBCS and x86-64 never supported that. Pointed out by Albert Cahalan Signed-off-by: -
Andi Kleen authored
We do some additional CPU synchronization in gettimeofday et.al. to make sure the time stamps are always monotonic over multiple CPUs. But on single core systems that is not needed. So don't do it. Signed-off-by: -
Andi Kleen authored
Cc: gregkh@suse.de Signed-off-by: -
Andi Kleen authored
It is faster than using a unrolled loop for the use cases the kernel cares about (cached, sizes typically < 4K) Signed-off-by: -
Matthew Garrett authored
Got it. i8259A_resume calls init_8259A(0) unconditionally, even if auto_eoi has been set. Keep track of the current status and restore that on resume. This fixes it for AMD64 and i386. Signed-off-by:
Matthew Garrett <mjg59@srcf.ucam.org> Signed-off-by:
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Dave Jones authored
Sometimes, bug reports come in where we've had an oops, and the only record we have is what the reporter saw on screen shortly before the system locked up completely. Unfortunatly, syslog only prints lines beginning with KERN_EMERG to the console, so some lines get lost. An example of this can be seen at https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=203723 Some of this information isn't vital to diagnosis, but some parts are useful, such as the tainted flag. Signed-off-by:
Dave Jones <davej@redhat.com> Signed-off-by:
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Jeremy Fitzhardinge authored
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:
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Andi Kleen authored
Following earlier x86-64 patch Cc: gregkh@suse.de Signed-off-by: -
Aaron Durbin authored
On Sat, Sep 09, 2006 at 04:14:29PM +0200, Andi Kleen wrote: > [patch] Looks reasonable, but probably not for 2.6.18 because this stuff > is already too fragile and it is probably too risky to do any big changes now > since not enough testing time is left. Can you please resubmit > it with proper description and signed-off-by line? I can queue it for .19 then > > -Andi Patch inserts PCI memory mapped config region(s) into the resource map. This will allow for the MMCCONFIG regions to be marked as busy in the iomem address space as well as the regions(s) showing up in /proc/iomem. Signed-off-by:
Aaron Durbin <adurbin@google.com> Signed-off-by:
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Aaron Durbin authored
Patch inserts the GART region into the iomem resource map. The GART will then be visible within /proc/iomem. It will also allow for other users utilizing the GART to subreserve the region (agp or IOMMU). Signed-off-by:
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Andi Kleen authored
Needs earlier patch to split type 1 probing from use. This patch should fix the x86 macs where type 1 PCI config space access doesn't work, but MCFG does. They also don't have a usable e820 table so the e820 sanity check failed. Instead assume now that if type 1 doesn't work then MCFG must work and don't do the e820 check. Signed-off-by: -
Andi Kleen authored
First probe if type1/2 accesses work, but then only initialize them at the end. This is useful for a later patch that needs this information inbetween. Signed-off-by: -
Andi Kleen authored
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: -
Eric W. Biederman authored
kexec has been marked experimental for a year now and all of the serious problems have been worked through. So it is time (if not past time) to remove the experimental mark. Signed-off-by:
Eric W. Biederman <ebiederm@xmission.com> Signed-off-by:
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Eric W. Biederman authored
kexec has been marked experimental for a year now and all of the serious problems have been worked through. So it is time (if not past time) to remove the experimental mark. Signed-off-by:
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Andi Kleen authored
Before 2.6.16 this was changed to work around code that accessed CPUs not in the possible map. But that code should be all fixed now, so mark it __initdata again. Signed-off-by: -
Andi Kleen authored
Signed-off-by: -
Andi Kleen authored
This quietens so warnings about uninitialized use of the return value of the pda read operations. Signed-off-by: -
Andi Kleen authored
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 authored
- Replace some broken white space. - Replace __ keywords with standard names No functional changes. Signed-off-by: -
Andi Kleen authored
Quietens some new warnings Signed-off-by: -
Andi Kleen authored
Fix linux/fs/compat.c: In function compat_sys_pselect7 linux/fs/compat.c:1869: warning: ignoring return value of copy_to_user, declared with attribute warn_unused_result To make it easier to handle I changed to semantics to not try to write out a timespec if an error occurred. I hope that's ok. Cc: dwmw2@infradead.org Signed-off-by: -
Andi Kleen authored
Following i386. And also fix the two occurrences that caused warnings in arch/x86_64/* Signed-off-by: -
Andi Kleen authored
- 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: -
adurbin@google.com authored
Add HPET(s) into resource map. This will allow for the HPET(s) to be visibile within /proc/iomem. Signed-off-by:
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adurbin@google.com authored
This patch places the IOAPIC(s) and the Local APIC specified by ACPI tables into the resource map. The APICs will then be visible within /proc/iomem Signed-off-by:
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Chuck Ebbert authored
Add early i386 fault handlers with debug information for common faults. Handles: divide error invalid opcode protection fault page fault Also adds code to detect early recursive/multiple faults and halt the system when they happen (taken from x86_64.) Signed-off-by:Chuck Ebbert <76306.1226@compuserve.com> Signed-off-by:
Andrew Morton <akpm@osdl.org>
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Rusty Russell authored
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:
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Rusty Russell authored
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:
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Andi Kleen authored
Fix linux/arch/x86_64/kernel/process.c: In function __switch_to: linux/arch/x86_64/kernel/process.c:626: warning: assignment makes integer from pointer without a cast Signed-off-by: -
Jeremy Fitzhardinge authored
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:
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Andi Kleen authored
Apparently that is the more official way to get numbers without $ in inline assembly Signed-off-by: -
Andi Kleen authored
Signed-off-by: -
Arjan van de Ven authored
Add a feature check that checks that the gcc compiler has stack-protector support and has the bugfix for PR28281 to make this work in kernel mode. The easiest solution I could find was to have a shell script in scripts/ to do the detection; if needed we can make this fancier in the future without making the makefile too complex. Signed-off-by:
Arjan van de Ven <arjan@linux.intel.com> Signed-off-by:
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Arjan van de Ven authored
GCC emits a call to a __stack_chk_fail() function when the stack canary is not matching the expected value. Since this is a bad security issue; lets panic the kernel rather than limping along; the kernel really can't be trusted anymore when this happens. Signed-off-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
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