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* [PATCH] i386: PARAVIRT: Allow paravirt backend to choose kernel PMD sharingJeremy Fitzhardinge2007-05-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Normally when running in PAE mode, the 4th PMD maps the kernel address space, which can be shared among all processes (since they all need the same kernel mappings). Xen, however, does not allow guests to have the kernel pmd shared between page tables, so parameterize pgtable.c to allow both modes of operation. There are several side-effects of this. One is that vmalloc will update the kernel address space mappings, and those updates need to be propagated into all processes if the kernel mappings are not intrinsically shared. In the non-PAE case, this is done by maintaining a pgd_list of all processes; this list is used when all process pagetables must be updated. pgd_list is threaded via otherwise unused entries in the page structure for the pgd, which means that the pgd must be page-sized for this to work. Normally the PAE pgd is only 4x64 byte entries large, but Xen requires the PAE pgd to page aligned anyway, so this patch forces the pgd to be page aligned+sized when the kernel pmd is unshared, to accomodate both these requirements. Also, since there may be several distinct kernel pmds (if the user/kernel split is below 3G), there's no point in allocating them from a slab cache; they're just allocated with get_free_page and initialized appropriately. (Of course the could be cached if there is just a single kernel pmd - which is the default with a 3G user/kernel split - but it doesn't seem worthwhile to add yet another case into this code). [ Many thanks to wli for review comments. ] Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: William Lee Irwin III <wli@holomorphy.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Zachary Amsden <zach@vmware.com> Cc: Christoph Lameter <clameter@sgi.com> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* [PATCH] i386: PARAVIRT: Hooks to set up initial pagetableJeremy Fitzhardinge2007-05-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch introduces paravirt_ops hooks to control how the kernel's initial pagetable is set up. In the case of a native boot, the very early bootstrap code creates a simple non-PAE pagetable to map the kernel and physical memory. When the VM subsystem is initialized, it creates a proper pagetable which respects the PAE mode, large pages, etc. When booting under a hypervisor, there are many possibilities for what paging environment the hypervisor establishes for the guest kernel, so the constructon of the kernel's pagetable depends on the hypervisor. In the case of Xen, the hypervisor boots the kernel with a fully constructed pagetable, which is already using PAE if necessary. Also, Xen requires particular care when constructing pagetables to make sure all pagetables are always mapped read-only. In order to make this easier, kernel's initial pagetable construction has been changed to only allocate and initialize a pagetable page if there's no page already present in the pagetable. This allows the Xen paravirt backend to make a copy of the hypervisor-provided pagetable, allowing the kernel to establish any more mappings it needs while keeping the existing ones. A slightly subtle point which is worth highlighting here is that Xen requires all kernel mappings to share the same pte_t pages between all pagetables, so that updating a kernel page's mapping in one pagetable is reflected in all other pagetables. This makes it possible to allocate a page and attach it to a pagetable without having to explicitly enumerate that page's mapping in all pagetables. And: +From: "Eric W. Biederman" <ebiederm@xmission.com> If we don't set the leaf page table entries it is quite possible that will inherit and incorrect page table entry from the initial boot page table setup in head.S. So we need to redo the effort here, so we pick up PSE, PGE and the like. Hypervisors like Xen require that their page tables be read-only, which is slightly incompatible with our low identity mappings, however I discussed this with Jeremy he has modified the Xen early set_pte function to avoid problems in this area. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> Acked-by: William Irwin <bill.irwin@oracle.com> Cc: Ingo Molnar <mingo@elte.hu>
* [PATCH] i386: PARAVIRT: Add pagetable accessors to pack and unpack pagetable ↵Jeremy Fitzhardinge2007-05-02
| | | | | | | | | | | | | | | entries Add a set of accessors to pack, unpack and modify page table entries (at all levels). This allows a paravirt implementation to control the contents of pgd/pmd/pte entries. For example, Xen uses this to convert the (pseudo-)physical address into a machine address when populating a pagetable entry, and converting back to pphys address when an entry is read. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> Acked-by: Ingo Molnar <mingo@elte.hu>
* [PATCH] i386: PARAVIRT: use paravirt_nop to consistently mark no-op operationsJeremy Fitzhardinge2007-05-02
| | | | | | | | | | | | | | | | | Add a _paravirt_nop function for use as a stub for no-op operations, and paravirt_nop #defined void * version to make using it easier (since all its uses are as a void *). This is useful to allow the patcher to automatically identify noop operations so it can simply nop out the callsite. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> Acked-by: Ingo Molnar <mingo@elte.hu> [mingo] but only as a cleanup of the current open-coded (void *) casts. My problem with this is that it loses the types. Not that there is much to check for, but still, this adds some assumptions about how function calls look like
* [PATCH] i386: PARAVIRT: Remove CONFIG_DEBUG_PARAVIRTJeremy Fitzhardinge2007-05-02
| | | | | | | | | | | | | | | Remove CONFIG_DEBUG_PARAVIRT. When inlining code, this option attempts to trash registers in the patch-site's "clobber" field, on the grounds that this should find bugs with incorrect clobbers. Unfortunately, the clobber field really means "registers modified by this patch site", which includes return values. Because of this, this option has outlived its usefulness, so remove it. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Rusty Russell <rusty@rustcorp.com.au>
* [PATCH] i386: i386 separate hardware-defined TSS from Linux additionsRusty Russell2007-05-02
| | | | | | | | | | | | | | | | | | | On Thu, 2007-03-29 at 13:16 +0200, Andi Kleen wrote: > Please clean it up properly with two structs. Not sure about this, now I've done it. Running it here. If you like it, I can do x86-64 as well. == lguest defines its own TSS struct because the "struct tss_struct" contains linux-specific additions. Andi asked me to split the struct in processor.h. Unfortunately it makes usage a little awkward. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andi Kleen <ak@suse.de>
* [PATCH] x86-64: x86-64 system crashes when no memory populating Node 0James Puthukattukaran2007-05-02
| | | | | | | | | | | I have a 4 socket AMD Operton system. The 2.6.18 kernel I have crashes when there is no memory in node0. AK: changed call to _nopanic Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andi Kleen <ak@suse.de>
* [PATCH] x86-64: Fix x86_64 compilation with DEBUG_SIG onGlauber de Oliveira Costa2007-05-02
| | | | | | | | | Setting the DEBUG_SIG flag breaks compilation due to a wrong struct access. Aditionally, it raises two warnings. This is one patch to fix them all. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Andi Kleen <ak@suse.de>
* [PATCH] i386: Allow boot-time disable of SMP altinstructionsJeremy Fitzhardinge2007-05-02
| | | | | | | Add "noreplace-smp" to disable SMP instruction replacement. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de>
* [PATCH] i386: Remove smp_alt_instructionsJeremy Fitzhardinge2007-05-02
| | | | | | | | | | | The .smp_altinstructions section and its corresponding symbols are completely unused, so remove them. Also, remove stray #ifdef __KENREL__ in asm-i386/alternative.h Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Andi Kleen <ak@suse.de>
* [PATCH] x86: Allow percpu variables to be page-alignedJeremy Fitzhardinge2007-05-02
| | | | | | | | | | | | | | | Let's allow page-alignment in general for per-cpu data (wanted by Xen, and Ingo suggested KVM as well). Because larger alignments can use more room, we increase the max per-cpu memory to 64k rather than 32k: it's getting a little tight. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* [PATCH] i386: Enable bank 0 on non K7 AthlonAndi Kleen2007-05-02
| | | | | | | | | As a bug workaround bank 0 on K7s is normally disabled, but no need to do that on other AMD CPUs. Cc: davej@redhat.com Signed-off-by: Andi Kleen <ak@suse.de>
* [PATCH] i386: Update smp_call_function* commentsJeremy Fitzhardinge2007-05-02
| | | | | | | | | | | | Update documentation for i386 smp_call_function* functions. As reported by Randy Dunlap <rdunlap@xenotime.net> [ I've posted this before but it seems to have been lost along the way. ] Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Randy Dunlap <rdunlap@xenotime.net>
* [PATCH] i386: Use menuconfig objects - APMJan Engelhardt2007-05-02
| | | | | | | | | | (I hope Andi is the right one to Cc, otherwise please add, thanks!) Use menuconfigs instead of menus, so the whole menu can be disabled at once instead of going through all options. Signed-off-by: Jan Engelhardt <jengelh@gmx.de> Signed-off-by: Andi Kleen <ak@suse.de>
* [PATCH] x86: Don't use MWAIT on AMD Family 10Andi Kleen2007-05-02
| | | | | | | | | | | It doesn't put the CPU into deeper sleep states, so it's better to use the standard idle loop to save power. But allow to reenable it anyways for benchmarking. I also removed the obsolete idle=halt on i386 Cc: andreas.herrmann@amd.com Signed-off-by: Andi Kleen <ak@suse.de>
* [PATCH] x86-64: Clean up asm-x86_64/bugs.hJeremy Fitzhardinge2007-05-02
| | | | | | | | | Most of asm-x86_64/bugs.h is code which should be in a C file, so put it there. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Andi Kleen <ak@suse.de> Cc: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] i386: Make COMPAT_VDSO runtime selectable.Jeremy Fitzhardinge2007-05-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that relocation of the VDSO for COMPAT_VDSO users is done at runtime rather than compile time, it is possible to enable/disable compat mode at runtime. This patch allows you to enable COMPAT_VDSO mode with "vdso=2" on the kernel command line, or via sysctl. (Switching on a running system shouldn't be done lightly; any process which was relying on the compat VDSO will be upset if it goes away.) The COMPAT_VDSO config option still exists, but if enabled it just makes vdso_enabled default to VDSO_COMPAT. +From: Hugh Dickins <hugh@veritas.com> Fix oops from i386-make-compat_vdso-runtime-selectable.patch. Even mingetty at system startup finds it easy to trigger an oops while reading /proc/PID/maps: though it has a good hold on the mm itself, that cannot stop exit_mm() from resetting tsk->mm to NULL. (It is usually show_map()'s call to get_gate_vma() which oopses, and I expect we could change that to check priv->tail_vma instead; but no matter, even m_start()'s call just after get_task_mm() is racy.) Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Zachary Amsden <zach@vmware.com> Cc: "Jan Beulich" <JBeulich@novell.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Andi Kleen <ak@suse.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Roland McGrath <roland@redhat.com>
* [PATCH] i386: Relocate VDSO ELF headers to match mapped location with ↵Jeremy Fitzhardinge2007-05-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | COMPAT_VDSO Some versions of libc can't deal with a VDSO which doesn't have its ELF headers matching its mapped address. COMPAT_VDSO maps the VDSO at a specific system-wide fixed address. Previously this was all done at build time, on the grounds that the fixed VDSO address is always at the top of the address space. However, a hypervisor may reserve some of that address space, pushing the fixmap address down. This patch does the adjustment dynamically at runtime, depending on the runtime location of the VDSO fixmap. [ Patch has been through several hands: Jan Beulich wrote the orignal version; Zach reworked it, and Jeremy converted it to relocate phdrs as well as sections. ] Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Zachary Amsden <zach@vmware.com> Cc: "Jan Beulich" <JBeulich@novell.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Andi Kleen <ak@suse.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Roland McGrath <roland@redhat.com>
* [PATCH] i386: clean up identify_cpuJeremy Fitzhardinge2007-05-02
| | | | | | | | | | | | | | | identify_cpu() is used to identify both the boot CPU and secondary CPUs, but it performs some actions which only apply to the boot CPU. Those functions are therefore really __init functions, but because they're called by identify_cpu(), they must be marked __cpuinit. This patch splits identify_cpu() into identify_boot_cpu() and identify_secondary_cpu(), and calls the appropriate init functions from each. Also, identify_boot_cpu() and all the functions it dominates are marked __init. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de>
* [PATCH] i386: Clean up asm-i386/bugs.hJeremy Fitzhardinge2007-05-02
| | | | | | | | Most of asm-i386/bugs.h is code which should be in a C file, so put it there. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Linus Torvalds <torvalds@linux-foundation.org>
* [PATCH] x86: fix amd64-agp aperture validationJan Beulich2007-05-02
| | | | | | | | | | | | Under CONFIG_DISCONTIGMEM, assuming that a !pfn_valid() implies all subsequent pfn-s are also invalid is wrong. Thus replace this by explicitly checking against the E820 map. AK: make e820 on x86-64 not initdata Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Acked-by: Mark Langsdorf <mark.langsdorf@amd.com>
* [PATCH] i386: Remove unneeded externs in nmi.cAndi Kleen2007-05-02
| | | | | All were already in some header Signed-off-by: Andi Kleen <ak@suse.de>
* [PATCH] i386: Add machine_ops interface to abstract halting and rebootingJeremy Fitzhardinge2007-05-02
| | | | | | | | | | machine_ops is an interface for the machine_* functions defined in <linux/reboot.h>. This is intended to allow hypervisors to intercept the reboot process, but it could be used to implement other x86 subarchtecture reboots. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de>
* [PATCH] i386: Add smp_ops interfaceJeremy Fitzhardinge2007-05-02
| | | | | | | | | | | | | | | | | Add a smp_ops interface. This abstracts the API defined by <linux/smp.h> for use within arch/i386. The primary intent is that it be used by a paravirtualizing hypervisor to implement SMP, but it could also be used by non-APIC-using sub-architectures. This is related to CONFIG_PARAVIRT, but is implemented unconditionally since it is simpler that way and not a highly performance-sensitive interface. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Andi Kleen <ak@suse.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
* [PATCH] i386: cleanup GDT AccessRusty Russell2007-05-02
| | | | | | | | | | | | | Now we have an explicit per-cpu GDT variable, we don't need to keep the descriptors around to use them to find the GDT: expose cpu_gdt directly. We could go further and make load_gdt() pack the descriptor for us, or even assume it means "load the current cpu's GDT" which is what it always does. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* [PATCH] x86-64: Fix "Section mismatch" compile warningBernhard Walle2007-05-02
| | | | | | | Fix "Section mismatch" warnings in arch/x86_64/kernel/time.c Signed-off-by: Bernhard Walle <bwalle@suse.de> Signed-off-by: Andi Kleen <ak@suse.de>
* [PATCH] x86-64: adjust EDID retrievalJan Beulich2007-05-02
| | | | | | | | | | | | commit 5e518d7672dea4cd7c60871e40d0490c52f01d13 did the same change to i386's variant. With this change, i386's and x86-64's versions are identical, raising the question whether the x86-64 one should go (just like there's only one instance of edd.S). Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de>
* [PATCH] x86-64: Inhibit machine from asserting an NMI when doing Alt-SysRq-M ↵Konrad Rzeszutek2007-05-02
| | | | | | | | | | | | | | operation. This patch touches the NMI watchdog every MAX_ORDER_NR_PAGES to inhibit the machine from triggering an NMI while the CPUs are locked. This situation is happening on boxes with more than 64CPUs and 128GB of RAM when Alt-SysRq-m is performed. It has been succesfully tested for regression on uni, 2, 4, 8 32, and 64 CPU boxes with various memory configuration. Signed-off-by: Andi Kleen <ak@suse.de>
* [PATCH] x86-64: vsyscall_gtod_data diet and vgettimeofday() fixEric Dumazet2007-05-02
| | | | | | | | | | | | | | | Current vsyscall_gtod_data is large (3 or 4 cache lines dirtied at timer interrupt). We can shrink it to exactly 64 bytes (1 cache line on AMD64) Instead of copying a whole struct clocksource, we copy only needed fields. I deleted an unused field : offset_base This patch fixes one oddity in vgettimeofday(): It can returns a timeval with tv_usec = 1000000. Maybe not a bug, but why not doing the right thing ? Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: Andi Kleen <ak@suse.de>
* [PATCH] x86-64: fix vtime() vsyscallEric Dumazet2007-05-02
| | | | | | | | | | | | | | | | | | | There is a tiny probability that the return value from vtime(time_t *t) is Signed-off-by: Andi Kleen <ak@suse.de> different than the value stored in *t Using a temporary variable solves the problem and gives a faster code. 17: 48 85 ff test %rdi,%rdi 1a: 48 8b 05 00 00 00 00 mov 0(%rip),%rax # __vsyscall_gtod_data.wall_time_tv.tv_sec 21: 74 03 je 26 23: 48 89 07 mov %rax,(%rdi) 26: c9 leaveq 27: c3 retq Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
* [PATCH] x86: remove UNEXPECTED_IO_APIC()Adrian Bunk2007-05-02
| | | | | | | | | Many years ago, UNEXPECTED_IO_APIC() contained printk()'s (but nothing more). Now that it's completely empty for years, we can as well remove it. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andi Kleen <ak@suse.de>
* [PATCH] x86: sys_ioperm() prototype cleanupAdrian Bunk2007-05-02
| | | | | | | | | | - there's no reason for duplicating the prototype from include/linux/syscalls.h in include/asm-x86_64/unistd.h - every file should #include the headers containing the prototypes for it's global functions Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andi Kleen <ak@suse.de>
* [PATCH] x86-64: use lru instead of page->index and page->private for pgd ↵Christoph Lameter2007-05-02
| | | | | | | | | | | | | | | | | lists management. x86_64 currently simulates a list using the index and private fields of the page struct. Seems that the code was inherited from i386. But x86_64 does not use the slab to allocate pgds and pmds etc. So the lru field is not used by the slab and therefore available. This patch uses standard list operations on page->lru to realize pgd tracking. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* [PATCH] i386: remove the APM_RTC_IS_GMT config option.Parag Warudkar2007-05-02
| | | | | | Signed-off-by: Parag Warudkar <parag.warudkar@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andi Kleen <ak@suse.de>
* [PATCH] x86-64: Remove unused stext symbolAndi Kleen2007-05-02
| | | | | | suggested by Jan Beulich Signed-off-by: Andi Kleen <ak@suse.de>
* [PATCH] i386: get rid of unused variablesParag Warudkar2007-05-02
| | | | | | Signed-off-by: Parag Warudkar <parag.warudkar@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andi Kleen <ak@suse.de>
* [PATCH] x86: tighten kernel image page access rightsJan Beulich2007-05-02
| | | | | | | | | | | | | | | | | | | | | | | On x86-64, kernel memory freed after init can be entirely unmapped instead of just getting 'poisoned' by overwriting with a debug pattern. On i386 and x86-64 (under CONFIG_DEBUG_RODATA), kernel text and bug table can also be write-protected. Compared to the first version, this one prevents re-creating deleted mappings in the kernel image range on x86-64, if those got removed previously. This, together with the original changes, prevents temporarily having inconsistent mappings when cacheability attributes are being changed on such pages (e.g. from AGP code). While on i386 such duplicate mappings don't exist, the same change is done there, too, both for consistency and because checking pte_present() before using various other pte_XXX functions is a requirement anyway. At once, i386 code gets adjusted to use pte_huge() instead of open coding this. AK: split out cpa() changes Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de>
* [PATCH] x86: Improve handling of kernel mappings in change_page_attrJan Beulich2007-05-02
| | | | | | | | | Fix various broken corner cases in i386 and x86-64 change_page_attr. AK: split off from tighten kernel image access rights Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de>
* [PATCH] i386: rationalize paravirt wrappersRusty Russell2007-05-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | paravirt.c used to implement native versions of all low-level functions. Far cleaner is to have the native versions exposed in the headers and as inline native_XXX, and if !CONFIG_PARAVIRT, then simply #define XXX native_XXX. There are several nice side effects: 1) write_dt_entry() now takes the correct "struct Xgt_desc_struct *" not "void *". 2) load_TLS is reintroduced to the for loop, not manually unrolled with a #error in case the bounds ever change. 3) Macros become inlines, with type checking. 4) Access to the native versions is trivial for KVM, lguest, Xen and others who might want it. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Andi Kleen <ak@muc.de> Cc: Avi Kivity <avi@qumranet.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* [PATCH] i386: Rename boot_gdt_table to boot_gdtSebastien Dugue2007-05-02
| | | | | | | | | | Rename boot_gdt_table to boot_gdt to avoid the duplicate T(able). Signed-off-by: Sebastien Dugue <sebastien.dugue@bull.net> Signed-off-by: Andi Kleen <ak@suse.de> Acked-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* [PATCH] i386: clean up cpu_init()Rusty Russell2007-05-02
| | | | | | | | | | | We now have cpu_init() and secondary_cpu_init() doing nothing but calling _cpu_init() with the same arguments. Rename _cpu_init() to cpu_init() and use it as a replcement for secondary_cpu_init(). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* [PATCH] i386: Use per-cpu GDT immediately upon bootRusty Russell2007-05-02
| | | | | | | | | | | | | | | | | | Now we are no longer dynamically allocating the GDT, we don't need the "cpu_gdt_table" at all: we can switch straight from "boot_gdt_table" to the per-cpu GDT. This means initializing the cpu_gdt array in C. The boot CPU uses the per-cpu var directly, then in smp_prepare_cpus() it switches to the per-cpu copy just allocated. For secondary CPUs, the early_gdt_descr is set to point directly to their per-cpu copy. For UP the code is very simple: it keeps using the "per-cpu" GDT as per SMP, but we never have to move. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* [PATCH] i386: Use per-cpu variables for GDT, PDARusty Russell2007-05-02
| | | | | | | | | | | | Allocating PDA and GDT at boot is a pain. Using simple per-cpu variables adds happiness (although we need the GDT page-aligned for Xen, which we do in a followup patch). [akpm@linux-foundation.org: build fix] Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* [PATCH] x86: add command line length to boot protocolBernhard Walle2007-05-02
| | | | | | | | | | | | | | | | | | | | | | Because the command line is increased to 2048 characters after 2.6.21, it's not possible for boot loaders and userspace tools to determine the length of the command line the kernel can understand. The benefit of knowing the length is that users can be warned if the command line size is too long which prevents surprise if things don't work after bootup. This patch updates the boot protocol to contain a field called "cmdline_size" that contain the length of the command line (excluding the terminating zero). The patch also adds missing fields (of protocol version 2.05) to the x86_64 setup code. Signed-off-by: Bernhard Walle <bwalle@suse.de> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Alon Bar-Lev <alon.barlev@gmail.com> Acked-by: H. Peter Anvin <hpa@zytor.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* [PATCH] i386: VDSO_PRELINK warning fixAndrew Morton2007-05-02
| | | | | | | | | | | | | | | | | | | | The lguest patches somehow managed to trigger this: In file included from arch/i386/lguest/lguest.c:38: include/asm/asm-offsets.h:67:1: warning: "VDSO_PRELINK" redefined In file included from include/linux/elf.h:7, from include/linux/module.h:15, from include/linux/device.h:21, from include/linux/interrupt.h:15, from arch/i386/lguest/lguest.c:27: include/asm/elf.h:140:1: warning: this is the location of the previous definition I assume that using the same identifier twice was a bad idea.. Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andi Kleen <ak@suse.de>
* [PATCH] x86: remove constant_tsc reporting from /proc/cpuinfo' power flagsJoerg Roedel2007-05-02
| | | | | | | | | | remove the reporting of the constant_tsc flag from the "power management" field in /proc/cpuinfo. The NULL value there was replaced by "" because the former would result in a printout of [8] if the flag is set. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andi Kleen <ak@suse.de>
* [PATCH] x86-64: fixed size remaining fake nodesDavid Rientjes2007-05-02
| | | | | | | | | | | | | | | | | | | | | Extends the numa=fake x86_64 command-line option to split the remaining system memory into nodes of fixed size. Any leftover memory is allocated to a final node unless the command-line ends with a comma. For example: numa=fake=2*512,*128 gives two 512M nodes and the remaining system memory is split into nodes of 128M each. This is beneficial for systems where the exact size of RAM is unknown or not necessarily relevant, but the size of the remaining nodes to be allocated is known based on their capacity for resource management. Cc: Andi Kleen <ak@suse.de> Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Paul Jackson <pj@sgi.com> Cc: Christoph Lameter <clameter@engr.sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* [PATCH] x86-64: split remaining fake nodes equallyDavid Rientjes2007-05-02
| | | | | | | | | | | | | | | | | | | | | Extends the numa=fake x86_64 command-line option to split the remaining system memory into equal-sized nodes. For example: numa=fake=2*512,4* gives two 512M nodes and the remaining system memory is split into four approximately equal chunks. This is beneficial for systems where the exact size of RAM is unknown or not necessarily relevant, but the granularity with which nodes shall be allocated is known. Cc: Andi Kleen <ak@suse.de> Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Paul Jackson <pj@sgi.com> Cc: Christoph Lameter <clameter@engr.sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* [PATCH] x86-64: configurable fake numa node sizesDavid Rientjes2007-05-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Extends the numa=fake x86_64 command-line option to allow for configurable node sizes. These nodes can be used in conjunction with cpusets for coarse memory resource management. The old command-line option is still supported: numa=fake=32 gives 32 fake NUMA nodes, ignoring the NUMA setup of the actual machine. But now you may configure your system for the node sizes of your choice: numa=fake=2*512,1024,2*256 gives two 512M nodes, one 1024M node, two 256M nodes, and the rest of system memory to a sixth node. The existing hash function is maintained to support the various node sizes that are possible with this implementation. Each node of the same size receives roughly the same amount of available pages, regardless of any reserved memory with its address range. The total available pages on the system is calculated and divided by the number of equal nodes to allocate. These nodes are then dynamically allocated and their borders extended until such time as their number of available pages reaches the required size. Configurable node sizes are recommended when used in conjunction with cpusets for memory control because it eliminates the overhead associated with scanning the zonelists of many smaller full nodes on page_alloc(). Cc: Andi Kleen <ak@suse.de> Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Paul Jackson <pj@sgi.com> Cc: Christoph Lameter <clameter@engr.sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* [PATCH] i386: fix GDT's number of quadwords in commentAhmed S. Darwish2007-05-02
| | | | | | | | | Fix comments to represent the true number of quadwords in GDT. Signed-off-by: Ahmed S. Darwish <darwish.07@gmail.com> Signed-off-by: Andi Kleen <ak@suse.de> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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