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2006-09-26[PATCH] i386/x86-64: Make all early PCI scans dependent on CONFIG_PCIAndi Kleen
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>
2006-09-26[PATCH] Don't leak NT bit into next taskAndi Kleen
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>
2006-09-26[PATCH] i386/x86-64: Work around gcc bug with noreturn functions in unwinderJan Beulich
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>
2006-09-26[PATCH] Fix some broken white space in ia32_signal.cAndi Kleen
No functional changes Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] Initialize argument registers for 32bit signal handlers.Andi Kleen
In case the user space was compiled with -mregparm=3 Following i386. Pointed out by Albert Cahalan Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] Remove all traces of signal number conversionAndi Kleen
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 <ak@suse.de>
2006-09-26[PATCH] Don't synchronize time reading on single core AMD systemsAndi Kleen
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 <ak@suse.de>
2006-09-26[PATCH] Remove outdated comment in x86-64 mmconfig codeAndi Kleen
Cc: gregkh@suse.de Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] Use string instructions for Core2 copy/clearAndi Kleen
It is faster than using a unrolled loop for the use cases the kernel cares about (cached, sizes typically < 4K) Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] x86: - restore i8259A eoi status on resumeMatthew Garrett
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: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] MMCONFIG and new Intel motherboardsAaron Durbin
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: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] Insert GART region into resource mapAaron Durbin
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: Aaron Durbin <adurbin@google.com> Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] i386/x86-64: Only do MCFG e820 check when type 1 worksAndi Kleen
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 <ak@suse.de>
2006-09-26[PATCH] i386/x86-64: PCI: split probing and initialization of type 1 config ↵Andi Kleen
space access 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 <ak@suse.de>
2006-09-26[PATCH] Fix idle notifiersAndi Kleen
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>
2006-09-26[PATCH] Remove experimental mark of kexecEric W. Biederman
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: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] Mark per cpu data initialization __initdata againAndi Kleen
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 <ak@suse.de>
2006-09-26[PATCH] Check return values of __copy_to_user in uname emulationAndi Kleen
Quietens some new warnings Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] Add __must_check to copy_*_userAndi Kleen
Following i386. And also fix the two occurrences that caused warnings in arch/x86_64/* Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] Fix zeroing on exception in copy_*_userAndi Kleen
- 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>
2006-09-26[PATCH] insert IOAPIC(s) and Local APIC into resource mapadurbin@google.com
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: Aaron Durbin <adurbin@google.com> Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] Fix a PDA warning uncovered by the new type checkingAndi Kleen
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: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] Fix a irqcount comment in entry.SAndi Kleen
Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] Add the -fstack-protector option to the CFLAGSArjan van de Ven
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: Andi Kleen <ak@suse.de> CC: Andi Kleen <ak@suse.de> CC: Sam Ravnborg <sam@ravnborg.org>
2006-09-26[PATCH] Add the canary field to the PDA area and the task structArjan van de Ven
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>
2006-09-26[PATCH] Add the Kconfig option for the stackprotector featureArjan van de Ven
This patch adds the config options for -fstack-protector. 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>
2006-09-26[PATCH] Don't use kernel_text_address in oops contextAndi Kleen
Because it can take spinlocks. Suggested by Mathieu Desnoyers Cc: Mathieu Desnoyers <compudj@krystal.dyndns.org> Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] Avoid overwriting the current pgd (V4, x86_64)Magnus Damm
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>
2006-09-26[PATCH] Remove most of the special cases for the debug IST stackKeith Owens
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>
2006-09-26[PATCH] Optimize PDA accesses slightlyAndi Kleen
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>
2006-09-26[PATCH] Put .note.* sections into a PT_NOTE segmentIan Campbell
This patch updates x86_64 linker script to pack any .note.* sections into a PT_NOTE segment in the output file. To do this, we tell ld that we need a PT_NOTE segment. This requires us to start explicitly mapping sections to segments, so we also need to explicitly create PT_LOAD segments for text and data, and map the sections to them appropriately. Fortunately, each section will default to its previous section's segment, so it doesn't take many changes to vmlinux.lds.S. The corresponding change is already made for i386 in -mm and I'd like this patch to join it. The section to segment mappings do change as do the segment flags so some time in -mm would be good for that reason as well, just in case. In particular .data and .bss move from the text segment to the data segment and .data.cacheline_aligned .data.read_mostly are put in the data segment instead of a separate one. I think that it would be possible to exactly match the existing section to segment mapping and flags but it would be a more intrusive change and I'm not sure there is a reason for the existing layout other than it is what you get by default if you don't explicitly specify something else. If there is a reason for the existing layout then I will of course make the more intrusive change. If there is no reason we could probably drop the executable or writable flags from some segments but I don't know how much attention is paid to them anyway so it might not be worth the effort. The vsyscall related sections need to go in a different segment to the normal data segment and so I invented a "user" segment to contain them. I believe this should appear to be another data segment as far as the kernel is concerned so the flags are setup accordingly. The notes will be used in the Xen paravirt_ops backend to provide additional information to the domain builder. I am in the process of converting the xen-unstable kernels and tools over to this scheme at the moment to support this in the future. It has been suggested to me that the notes segment should have flags 0 (i.e. not readable) since it is only used by the loader and is not used at runtime. For now I went with a readable segment since that is what the i386 patch uses. AK: dropped NOTES addition right now because the needed infrastructure for that is not merged yet Signed-off-by: Ian Campbell <ian.campbell@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] Reload CS when startup_64 is used.Eric W. Biederman
In long mode the %cs is largely a relic. However there are a few cases like iret where it matters that we have a valid value. Without this patch it is possible to enter the kernel in startup_64 without setting %cs to a valid value. With this patch we don't care what %cs value we enter the kernel with, so long as the cs shadow register indicates it is a privileged code segment. Thanks to Magnus Damm for finding this problem and posting the first workable patch. I have moved the jump to set %cs down a few instructions so we don't need to take an extra jump. Which keeps the code simpler. Signed-of-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] Remove non e820 fallbacks in high level codeAndi Kleen
Drop support for non e820 BIOS calls to get the memory map. The boot assembler code still has some support, but not the C code now. Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] Fix boot code head.S warningPaolo 'Blaisorblade' Giarrusso
When compiling a 64-bit kernel on an Ubuntu 6.06 32bit system (whose GCC is also a cross-compiler for x86_64) I've seen that head.o is compiled as a 64-bit file (while it should not) and ld complaining about this during linking: [AK: it happens on all systems with new binutils] ld: warning: i386:x86-64 architecture of input file `arch/x86_64/boot/compressed/head.o' is incompatible with i386 output I've verified that removing -m64 from compilation flags to turn "-m64 -traditional -m32" into "-traditional -m32" fixes the issue. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] Add a missing check for irq flags tracing in NMIAndi Kleen
NMIs are not supposed to track the irq flags, but TRACE_IRQS_IRETQ did it anyways. Add a check. Cc: mingo@elte.hu Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] Fix coding style and output of the mptable parserAndi Kleen
Give the printks a consistent prefix. Add some missing white space. Cc: len.brown@intel.com Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] Remove some cruft in apic id checking during processor setupAndi Kleen
- Remove a define that was used only once - Remove the too large APIC ID check because we always support the full 8bit range of APICs. - Restructure code a bit to be simpler. Cc: len.brown@intel.com Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] Remove APIC version/cpu capability mpparse checking/printingAndi Kleen
ACPI went to great trouble to get the APIC version and CPU capabilities of different CPUs before passing them to the mpparser. But all that data was used was to print it out. Actually it even faked some data based on the boot cpu, not on the actual CPU being booted. Remove all this code because it's not needed. Cc: len.brown@intel.com Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] Use proper accessors to change PSE bits in change_page_attr()Andi Kleen
Use normal pte accessors in change_page_attr() to access the PSE bits. Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] Fix pte_exec/mkexec and use it in change_page_attr()Andi Kleen
Fix the pte_exec/mkexec page table accessor functions to really use the NX bit. Previously they only checked the USER bit, but weren't actually used for anything. Then use them in change_page_attr() to manipulate the NX bit properly. Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] Remove bogus warning from early_ioremapAndi Kleen
It is correct for its only caller right now, but not for possible future others. Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] Remove safe_smp_processor_id()Andi Kleen
And replace all users with ordinary smp_processor_id. The function was originally added to get some basic oops information out even if the GS register was corrupted. However that didn't work for some anymore because printk is needed to print the oops and it uses smp_processor_id() already. Also GS register corruptions are not particularly common anymore. This also helps the Xen port which would otherwise need to do this in a special way because it can't access the local APIC. Cc: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] Detect clock skew during suspendRafael J. Wysocki
Detect the situations in which the time after a resume from disk would be earlier than the time before the suspend and prevent them from happening on x86_64. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] make numa_emulation() __initAndrew Morton
Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] Don't force reserve the 640k-1MB rangeAndi Kleen
From i386 x86-64 inherited code to force reserve the 640k-1MB area. That was needed on some old systems. But we generally trust the e820 map to be correct on 64bit systems and mark all areas that are not memory correctly. This patch will allow to use the real memory in there. Or rather the only way to find out if it's still needed is to try. So far I'm optimistic. Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] mark init_amd() as __cpuinitMagnus Damm
The init_amd() function is only called from identify_cpu() which is already marked as __cpuinit. So let's mark it as __cpuinit. Signed-off-by: Magnus Damm <magnus@valinux.co.jp> Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] x86_64 kernel mapping fixKeith Mannthey
Fix for the x86_64 kernel mapping code. Without this patch the update path only inits one pmd_page worth of memory and tramples any entries on it. now the calling convention to phys_pmd_init and phys_init is to always pass a [pmd/pud] page not an offset within a page. Signed-off-by: Keith Mannthey<kmannth@us.ibm.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@osdl.org>
2006-09-26[PATCH] wire up oops_enter()/oops_exit()Andrew Morton
Implement pause_on_oops() on x86_64. AK: I redid the patch to do the oops_enter/exit in the existing oops_begin()/end(). This makes it much shorter. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26[PATCH] non lazy "sleazy" fpu implementationArjan van de Ven
Right now the kernel on x86-64 has a 100% lazy fpu behavior: after *every* context switch a trap is taken for the first FPU use to restore the FPU context lazily. This is of course great for applications that have very sporadic or no FPU use (since then you avoid doing the expensive save/restore all the time). However for very frequent FPU users... you take an extra trap every context switch. The patch below adds a simple heuristic to this code: After 5 consecutive context switches of FPU use, the lazy behavior is disabled and the context gets restored every context switch. If the app indeed uses the FPU, the trap is avoided. (the chance of the 6th time slice using FPU after the previous 5 having done so are quite high obviously). After 256 switches, this is reset and lazy behavior is returned (until there are 5 consecutive ones again). The reason for this is to give apps that do longer bursts of FPU use still the lazy behavior back after some time. [akpm@osdl.org: place new task_struct field next to jit_keyring to save space] Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org>
2006-09-26[PATCH] fix bus numbering format in mmconfig warningBrice Goglin
Make an mmconfig warning print the bus id with a regular format. Signed-off-by: Brice Goglin <brice@myri.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org>