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path: root/arch/x86_64/kernel/vmlinux.lds.S
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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] 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] Add the vgetcpu vsyscallVojtech Pavlik
This patch adds a vgetcpu vsyscall, which depending on the CPU RDTSCP capability uses either the RDTSCP or CPUID to obtain a CPU and node numbers and pass them to the program. AK: Lots of changes over Vojtech's original code: Better prototype for vgetcpu() It's better to pass the cpu / node numbers as separate arguments to avoid mistakes when going from SMP to NUMA. Also add a fast time stamp based cache using a user supplied argument to speed things more up. Use fast method from Chuck Ebbert to retrieve node/cpu from GDT limit instead of CPUID Made sure RDTSCP init is always executed after node is known. Drop printk Signed-off-by: Vojtech Pavlik <vojtech@suse.cz> Signed-off-by: Andi Kleen <ak@suse.de>
2006-06-30Remove obsolete #include <linux/config.h>Jörn Engel
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-06-26[PATCH] x86_64: reliable stack trace support (x86-64)Jan Beulich
These are the x86_64-specific pieces to enable reliable stack traces. The only restriction with this is that it currently cannot unwind across the interrupt->normal stack boundary, as that transition is lacking proper annotation. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26[PATCH] x86_64: x86_64 version of the smp alternative patch.Gerd Hoffmann
Changes are largely identical to the i386 version: * alternative #define are moved to the new alternative.h file. * one new elf section with pointers to the lock prefixes which can be nop'ed out for non-smp. * two new elf sections simliar to the "classic" alternatives to replace SMP code with simpler UP code. * fixup headers to use alternative.h instead of defining their own LOCK / LOCK_PREFIX macros. The patch reuses the i386 version of the alternatives code to avoid code duplication. The code in alternatives.c was shuffled around a bit to reduce the number of #ifdefs needed. It also got some tweaks needed for x86_64 (vsyscall page handling) and new features (noreplacement option which was x86_64 only up to now). Debug printk's are changed from compile-time to runtime. Loosely based on a early version from Bastian Blank <waldi@debian.org> Signed-off-by: Gerd Hoffmann <kraxel@suse.de> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-04-09[PATCH] x86_64: Fixup read_mostly section on internode cache line size for vSMPRavikiran G Thirumalai
Fixup the read mostly section to start at internode cacheline boundary. Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org> Signed-off-by: Shai Fultheim <shai@scalex86.org> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Basic reorder infrastructureArjan van de Ven
This patch puts the infrastructure in place to allow for a reordering of functions based inside the vmlinux. The general idea is that it is possible to put all "common" functions into the first 2Mb of the code, so that they are covered by one TLB entry. This as opposed to the current situation where a typical vmlinux covers about 3.5Mb (on x86-64) and thus 2 TLB entries. This is done by enabling the -ffunction-sections flag in gcc, which puts each function in its own ELF section, so that the linker can then order them in a way defined by the linker script. As per previous discussions, Linus said he wanted a "static" list for this, eg a list provided by the kernel tarbal, so that most people have the same ordering at least. A script is provided to create this list based on readprofile(1) output. The included list is provisional, and entirely biased on my own testbox and me running a few kernel compiles and some other things. I think that to get to a better list we need to invite people to submit their own profiles, and somehow add those all up and base the final list on that. I'm willing to do that effort if this is ends up being the prefered approach. Such an effort probably needs to be repeated like once a year or so to adopt to the changing nature of the kernel. Made it a CONFIG with default n because it increases link times dramatically. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] x86_64: Patch to make the head.S-must-be-first-in-vmlinux order explicitArjan van de Ven
This patch puts the code from head.S in a special .bootstrap.text section. I'm working on a patch to reorder the functions in the kernel (I'll post that later), but for x86-64 at least the kernel bootstrap requires that the head.S functions are on the very first page/pages of the kernel text. This is understandable since the bootstrap is complex enough already and not a problem at all, it just means they aren't allowed to be reordered. This patch puts these special functions into a separate section to document this, and to guarantee this in the light of possibly reordering the rest later. (So this patch doesn't fix a bug per se, but makes things more robust by making the order of these functions explicit) Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-02-04[PATCH] x86_64: Let impossible CPUs point to reference per cpu dataAndi Kleen
Hack for 2.6.16. In 2.6.17 all code that uses NR_CPUs should be audited and changed to only touch possible CPUs. Don't mark the reference per cpu data init data (so it stays around after boot) and point all impossible CPUs to it. This way they reference some valid - although shared memory. Usually this is only initialization like INIT_LIST_HEADs and there won't be races because these CPUs never run. Still somewhat hackish. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-02-04[PATCH] x86_64: align per-cpu section to configured cache bytesZach Brown
Align the start of the per-cpu section to the configured number of bytes in a cache line. This stops a BUG_ON() from triggering in load_module() when DEFINE_PER_CPU() is used in a module and the section isn't cacheline-aligned. Rusty also found this and sent a patch in a while ago (http://lkml.org/lkml/2004/10/19/17), I don't know what came of that. Signed-off-by: Zach Brown <zach.brown@oracle.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-11[PATCH] x86_64: Allow compilation on a 32bit biarch toolchainAndi Kleen
This might help on distributions that use a 32bit biarch compiler. First pass -m64 by default. Secondly add some more .code32s because at least the Ubuntu biarch 32bit as called by gcc doesn't seem to handle -m64 -m32 as generated by the Makefile without such assistance. And finally make sure the linker script can be preprocessed with a 32bit cpp. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-11[PATCH] x86_64: Separate CONFIG_UNWIND_INFO from CONFIG_DEBUG_INFOJan Beulich
As a follow-up to the introduction of CONFIG_UNWIND_INFO, this separates the generation of frame unwind information for x86-64 from that of full debug information. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-14[PATCH] x86_64: Only use asm/sections.h to declare section symbolsAndi Kleen
Adding __initdata_* to asm-generic/sections.h Replaces a lot of open coded externs in arch/x86_64/* I had to change __bss_end to __bss_stop to match the other architectures. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-10[PATCH] x86_64 linker script cleanups for debug sectionsPaolo 'Blaisorblade' Giarrusso
Use the new macros for x86_64 too. Note that the current scripts includes different definitions; more exactly, it only contains part of the DWARF2 sections and the .comment one from Stabs. Shouldn't be a problem, anyway. Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-07[PATCH] kprobes: prevent possible race conditions x86_64 changesPrasanna S Panchamukhi
This patch contains the x86_64 architecture specific changes to prevent the possible race conditions. Signed-off-by: Prasanna S Panchamukhi <prasanna@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-12[PATCH] x86_64: section alignment fixAndrew Morton
This is the second time this has happened: inserting a new section requires that we adjust the arithmetic which is used to calculate the vsyscall page's offset. Cc: Christoph Lameter <christoph@lameter.com> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-07[PATCH] mostly_read data sectionChristoph Lameter
Add a new section called ".data.read_mostly" for data items that are read frequently and rarely written to like cpumaps etc. If these maps are placed in the .data section then these frequenly read items may end up in cachelines with data is is frequently updated. In that case all processors in an SMP system must needlessly reload the cachelines again and again containing elements of those frequently used variables. The ability to share these cachelines will allow each cpu in an SMP system to keep local copies of those shared cachelines thereby optimizing performance. Signed-off-by: Alok N Kataria <alokk@calsoftinc.com> Signed-off-by: Shobhit Dayal <shobhit@calsoftinc.com> Signed-off-by: Christoph Lameter <christoph@scalex86.org> Signed-off-by: Shai Fultheim <shai@scalex86.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-25[PATCH] kexec: x86_64: vmlinux: fix physical addressesEric W. Biederman
The vmlinux on x86_64 does not report the correct physical address of the kernel. Instead in the physical address field it currently reports the virtual address of the kernel. This is patch is a bug fix that corrects vmlinux to report the proper physical addresses. This is potentially a help for crash dump analysis tools. This definitiely allows bootloaders that load vmlinux as a standard ELF executable. Bootloaders directly loading vmlinux become of practical importance when we consider the kexec on panic case. Signed-off-by: Eric Biederman <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-16Linux-2.6.12-rc2Linus Torvalds
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!