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* crash_dump: export is_kdump_kernel to modules, consolidate elfcorehdr_addr, ↵Olaf Hering2011-03-241-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | setup_elfcorehdr and saved_max_pfn The Xen PV drivers in a crashed HVM guest can not connect to the dom0 backend drivers because both frontend and backend drivers are still in connected state. To run the connection reset function only in case of a crashdump, the is_kdump_kernel() function needs to be available for the PV driver modules. Consolidate elfcorehdr_addr, setup_elfcorehdr and saved_max_pfn into kernel/crash_dump.c Also export elfcorehdr_addr to make is_kdump_kernel() usable for modules. Leave 'elfcorehdr' as early_param(). This changes powerpc from __setup() to early_param(). It adds an address range check from x86 also on ia64 and powerpc. [akpm@linux-foundation.org: additional #includes] [akpm@linux-foundation.org: remove elfcorehdr_addr export] [akpm@linux-foundation.org: fix for Tejun's mm/nobootmem.c changes] Signed-off-by: Olaf Hering <olaf@aepfle.de> Cc: Russell King <rmk@arm.linux.org.uk> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'x86-platform-for-linus' of ↵Linus Torvalds2011-03-161-7/+1Star
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (27 commits) x86: Clean up apic.c and apic.h x86: Remove superflous goal definition of tsc_sync x86: dt: Correct local apic documentation in device tree bindings x86: dt: Cleanup local apic setup x86: dt: Fix OLPC=y/INTEL_CE=n build rtc: cmos: Add OF bindings x86: ce4100: Use OF to setup devices x86: ioapic: Add OF bindings for IO_APIC x86: dtb: Add generic bus probe x86: dtb: Add support for PCI devices backed by dtb nodes x86: dtb: Add device tree support for HPET x86: dtb: Add early parsing of IO_APIC x86: dtb: Add irq domain abstraction x86: dtb: Add a device tree for CE4100 x86: Add device tree support x86: e820: Remove conditional early mapping in parse_e820_ext x86: OLPC: Make OLPC=n build again x86: OLPC: Remove extra OLPC_OPENFIRMWARE_DT indirection x86: OLPC: Cleanup config maze completely x86: OLPC: Hide OLPC_OPENFIRMWARE config switch ... Fix up conflicts in arch/x86/platform/ce4100/ce4100.c
| * x86: e820: Remove conditional early mapping in parse_e820_extSebastian Andrzej Siewior2011-02-231-7/+1Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch ensures that the memory passed from parse_setup_data() is large enough to cover the complete data structure. That means that the conditional mapping in parse_e820_ext() can go. While here, I also attempt not to map two pages if the address is not aligned to a page boundary. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com> Cc: sodaville@linutronix.de Cc: devicetree-discuss@lists.ozlabs.org LKML-Reference: <1298405266-1624-2-git-send-email-bigeasy@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* | x86: Emit "mem=nopentium ignored" warning when not supportedKamal Mostafa2011-02-141-2/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Emit warning when "mem=nopentium" is specified on any arch other than x86_32 (the only that arch supports it). Signed-off-by: Kamal Mostafa <kamal@canonical.com> BugLink: http://bugs.launchpad.net/bugs/553464 Cc: Yinghai Lu <yinghai@kernel.org> Cc: Len Brown <len.brown@intel.com> Cc: Rafael J. Wysocki <rjw@sisk.pl> LKML-Reference: <1296783486-23033-2-git-send-email-kamal@canonical.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: <stable@kernel.org>
* | x86: Fix panic when handling "mem={invalid}" paramKamal Mostafa2011-02-141-0/+3
|/ | | | | | | | | | | | | | | Avoid removing all of memory and panicing when "mem={invalid}" is specified, e.g. mem=blahblah, mem=0, or mem=nopentium (on platforms other than x86_32). Signed-off-by: Kamal Mostafa <kamal@canonical.com> BugLink: http://bugs.launchpad.net/bugs/553464 Cc: Yinghai Lu <yinghai@kernel.org> Cc: Len Brown <len.brown@intel.com> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: <stable@kernel.org> # .3x: as far back as it applies LKML-Reference: <1296783486-23033-1-git-send-email-kamal@canonical.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* PM / ACPI: Move NVS saving and restoring code to drivers/acpiRafael J. Wysocki2011-01-071-0/+1
| | | | | | | | | | The saving of the ACPI NVS area during hibernation and suspend and restoring it during the subsequent resume is entirely specific to ACPI, so move it to drivers/acpi and drop the CONFIG_SUSPEND_NVS configuration option which is redundant. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Len Brown <len.brown@intel.com>
* x86, memblock: Use memblock_memory_size()/memblock_free_memory_size() to get ↵Yinghai Lu2010-08-271-0/+16
| | | | | | | | | | | | | | | | | correct dma_reserve memblock_memory_size() will return memory size in memblock.memory.region. memblock_free_memory_size() will return free memory size in memblock.memory.region. So We can get exact reseved size in specified range. Set the size right after initmem_init(), because later bootmem API will get area above 16M. (except some fallback). Later after we remove the bootmem, We could call that just before paging_init(). Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* x86: Remove not used early_res codeYinghai Lu2010-08-271-52/+0Star
| | | | | | | and some functions in e820.c that are not used anymore Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* x86: Use memblock to replace early_resYinghai Lu2010-08-271-106/+53Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1. replace find_e820_area with memblock_find_in_range 2. replace reserve_early with memblock_x86_reserve_range 3. replace free_early with memblock_x86_free_range. 4. NO_BOOTMEM will switch to use memblock too. 5. use _e820, _early wrap in the patch, in following patch, will replace them all 6. because memblock_x86_free_range support partial free, we can remove some special care 7. Need to make sure that memblock_find_in_range() is called after memblock_x86_fill() so adjust some calling later in setup.c::setup_arch() -- corruption_check and mptable_update -v2: Move reserve_brk() early Before fill_memblock_area, to avoid overlap between brk and memblock_find_in_range() that could happen We have more then 128 RAM entry in E820 tables, and memblock_x86_fill() could use memblock_find_in_range() to find a new place for memblock.memory.region array. and We don't need to use extend_brk() after fill_memblock_area() So move reserve_brk() early before fill_memblock_area(). -v3: Move find_smp_config early To make sure memblock_find_in_range not find wrong place, if BIOS doesn't put mptable in right place. -v4: Treat RESERVED_KERN as RAM in memblock.memory. and they are already in memblock.reserved already.. use __NOT_KEEP_MEMBLOCK to make sure memblock related code could be freed later. -v5: Generic version __memblock_find_in_range() is going from high to low, and for 32bit active_region for 32bit does include high pages need to replace the limit with memblock.default_alloc_limit, aka get_max_mapped() -v6: Use current_limit instead -v7: check with MEMBLOCK_ERROR instead of -1ULL or -1L -v8: Set memblock_can_resize early to handle EFI with more RAM entries -v9: update after kmemleak changes in mainline Suggested-by: David S. Miller <davem@davemloft.net> Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* suspend: Move NVS save/restore code to generic suspend functionalityMatthew Garrett2010-06-101-1/+1
| | | | | | | | | | Saving platform non-volatile state may be required for suspend to RAM as well as hibernation. Move it to more generic code. Signed-off-by: Matthew Garrett <mjg@redhat.com> Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Tested-by: Maxim Levitsky <maximlevitsky@gmail.com> Signed-off-by: Len Brown <len.brown@intel.com>
* x86: Make e820_remove_range to handle all covered caseYinghai Lu2010-04-011-4/+20
| | | | | | | | | | | | | | | | | | | | | | | | Rusty found on lguest with trim_bios_range, max_pfn is not right anymore, and looks e820_remove_range does not work right. [ 0.000000] BIOS-provided physical RAM map: [ 0.000000] LGUEST: 0000000000000000 - 0000000004000000 (usable) [ 0.000000] Notice: NX (Execute Disable) protection missing in CPU or disabled in BIOS! [ 0.000000] DMI not present or invalid. [ 0.000000] last_pfn = 0x3fa0 max_arch_pfn = 0x100000 [ 0.000000] init_memory_mapping: 0000000000000000-0000000003fa0000 root cause is: the e820_remove_range doesn't handle the all covered case. e820_remove_range(BIOS_START, BIOS_END - BIOS_START, ...) produces a bogus range as a result. Make it match e820_update_range() by handling that case too. Reported-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Tested-by: Rusty Russell <rusty@rustcorp.com.au> LKML-Reference: <4BB18E55.6090903@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* core: Move early_res from arch/x86 to kernel/Yinghai Lu2010-02-171-1/+9
| | | | | | | | | | | | | | This makes the range reservation feature available to other architectures. -v2: add get_max_mapped, max_pfn_mapped only defined in x86... to fix PPC compiling -v3: according to hpa, add CONFIG_HAVE_EARLY_RES -v4: fix typo about EARLY_RES in config Signed-off-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <4B7B5723.4070009@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* x86: Add find_fw_memmap_areaYinghai Lu2010-02-121-0/+4
| | | | | | | | ... so we can move early_res up. Signed-off-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1265793639-15071-27-git-send-email-yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* x86: Move back find_e820_area to e820.cYinghai Lu2010-02-121-0/+53
| | | | | | | | Makes early_res.c more clean, so later could move it to /kernel. Signed-off-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1265793639-15071-23-git-send-email-yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* x86: Separate early_res related code from e820.cYinghai Lu2010-02-121-540/+1Star
| | | | | | | | | | ... to make e820.c smaller. -v2: fix 32bit compiling with MAX_DMA32_PFN Signed-off-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1265793639-15071-21-git-send-email-yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* x86: Move bios page reserve early to head32/64.cYinghai Lu2010-02-121-20/+2Star
| | | | | | | | | | | So prepare to make one more clean of early_res.c. -v2: don't need to reserve first page in early_res because we already mark that in e820 as reserved already. Signed-off-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1265793639-15071-20-git-send-email-yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* x86: Make 64 bit use early_res instead of bootmem before slabYinghai Lu2010-02-121-13/+146
| | | | | | | | | | | | | Finally we can use early_res to replace bootmem for x86_64 now. Still can use CONFIG_NO_BOOTMEM to enable it or not. -v2: fix 32bit compiling about MAX_DMA32_PFN -v3: folded bug fix from LKML message below Signed-off-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <4B747239.4070907@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* x86: Dynamically increase early_res array sizeYinghai Lu2010-02-111-0/+53
| | | | | | | | | | | | | Use early_res_count to track the num, and use find_e820 to get a new buffer, then copy from the old to the new one. Also, clear early_res to prevent later invalid usage. -v2 _check_and_double_early_res should take new start Signed-off-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1265793639-15071-14-git-send-email-yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* x86: Introduce max_early_res and early_res_countYinghai Lu2010-02-111-15/+32
| | | | | | | | To prepare allocate early res array from fine_e820_area. Signed-off-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1265793639-15071-13-git-send-email-yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* x86: Print out RAM buffer informationYinghai Lu2010-02-111-0/+2
| | | | | | | | | So we can check that early in the bootlog. Signed-off-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1265793639-15071-11-git-send-email-yinghai@kernel.org> Reviewed-by: Christoph Lameter <cl@linux-foundation.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* Merge remote branch 'linus/master' into x86/bootmemH. Peter Anvin2010-02-111-2/+11
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| * x86: Fix size for ex trampoline with 32bitYinghai Lu2010-01-041-2/+2
| | | | | | | | | | | | | | | | | | | | | | fix for error that is introduced by | x86: Use find_e820() instead of hard coded trampoline address it should end with PAGE_SIZE + PAGE_SIZE Signed-off-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1261525263-13763-2-git-send-email-yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * x86: Increase MAX_EARLY_RES; insufficient on 32-bit NUMAYinghai Lu2009-12-171-1/+1
| | | | | | | | | | | | | | | | | | Due to recent changes wakeup and mptable, we run out of early reservations on 32-bit NUMA. Thus, adjust the available number. Signed-off-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <4B22D754.2020706@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * x86: Use find_e820() instead of hard coded trampoline addressYinghai Lu2009-12-111-1/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Jens found the following crash/regression: [ 0.000000] found SMP MP-table at [ffff8800000fdd80] fdd80 [ 0.000000] Kernel panic - not syncing: Overlapping early reservations 12-f011 MP-table mpc to 0-fff BIOS data page and [ 0.000000] Kernel panic - not syncing: Overlapping early reservations 12-f011 MP-table mpc to 6000-7fff TRAMPOLINE and bisected it to b24c2a9 ("x86: Move find_smp_config() earlier and avoid bootmem usage"). It turns out the BIOS is using the first 64k for mptable, without reserving it. So try to find good range for the real-mode trampoline instead of hard coding it, in case some bios tries to use that range for sth. Reported-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Tested-by: Jens Axboe <jens.axboe@oracle.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> LKML-Reference: <4B21630A.6000308@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | x86: Remove BIOS data range from e820Yinghai Lu2010-02-021-0/+8
|/ | | | | | | | | | | In preparation for moving to the generic page_is_ram(), make explicit what we expect to be reserved and not reserved. Tested-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <20100122033004.335813103@intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* pci: increase alignment to make more space for hidden codeYinghai Lu2009-10-111-2/+2
| | | | | | | | | | | | | | | | As reported in http://bugzilla.kernel.org/show_bug.cgi?id=13940 on some system when acpi are enabled, acpi clears some BAR for some devices without reason, and kernel will need to allocate devices for them. It then apparently hits some undocumented resource conflict, resulting in non-working devices. Try to increase alignment to get more safe range for unassigned devices. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: don't use alloc_bootmem_low() where not strictly neededJan Beulich2009-09-221-1/+1
| | | | | | | | | | | | | | | | | | | | Since alloc_bootmem() will never return inaccessible (via virtual addressing) memory anyway, using the ..._low() variant only makes sense when the physical address range of the allocated memory must fulfill further constraints, espacially since on 64-bits (or more generally in all cases where the pools the two variants allocate from are than the full available range. Probably the use in alloc_tce_table() could also be eliminated (based on code inspection of pci-calgary_64.c), but that seems too risky given I know nothing about that hardware and have no way to test it. Signed-off-by: Jan Beulich <jbeulich@novell.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'x86-platform-for-linus' of ↵Linus Torvalds2009-09-181-18/+1Star
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (38 commits) x86: Move get/set_wallclock to x86_platform_ops x86: platform: Fix section annotations x86: apic namespace cleanup x86: Distangle ioapic and i8259 x86: Add Moorestown early detection x86: Add hardware_subarch ID for Moorestown x86: Add early platform detection x86: Move tsc_init to late_time_init x86: Move tsc_calibration to x86_init_ops x86: Replace the now identical time_32/64.c by time.c x86: time_32/64.c unify profile_pc x86: Move calibrate_cpu to tsc.c x86: Make timer setup and global variables the same in time_32/64.c x86: Remove mca bus ifdef from timer interrupt x86: Simplify timer_ack magic in time_32.c x86: Prepare unification of time_32/64.c x86: Remove do_timer hook x86: Add timer_init to x86_init_ops x86: Move percpu clockevents setup to x86_init_ops x86: Move xen_post_allocator_init into xen_pagetable_setup_done ... Fix up conflicts in arch/x86/include/asm/io_apic.h
| * x86: Move memory_setup to x86_init_opsThomas Gleixner2009-08-271-18/+1Star
| | | | | | | | | | | | | | | | | | memory_setup is overridden by x86_quirks and by paravirts with weak functions and quirks. Unify the whole mess and make it an unconditional x86_init_ops function which defaults to the standard function and can be overridden by the early platform code. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* | Merge branch 'x86-setup-for-linus' of ↵Linus Torvalds2009-09-141-1/+1
|\ \ | |/ |/| | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-setup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, e820: Guard against array overflowed in __e820_add_region() x86, setup: remove obsolete pre-Kconfig CONFIG_VIDEO_ variables
| * x86, e820: Guard against array overflowed in __e820_add_region()Cyrill Gorcunov2009-08-261-1/+1
| | | | | | | | | | | | | | | | Better to be paranoid against unpredicted nr_map modifications. Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> LKML-Reference: <20090824175551.146070377@openvz.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | Remove multiple KERN_ prefixes from printk formatsJoe Perches2009-07-081-4/+3Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 5fd29d6ccbc98884569d6f3105aeca70858b3e0f ("printk: clean up handling of log-levels and newlines") changed printk semantics. printk lines with multiple KERN_<level> prefixes are no longer emitted as before the patch. <level> is now included in the output on each additional use. Remove all uses of multiple KERN_<level>s in formats. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | x86: add boundary check for 32bit res before expand e820 resource to alignmentYinghai Lu2009-07-021-6/+10
|/ | | | | | | | | | | fix hang with HIGHMEM_64G and 32bit resource. According to hpa and Linus, use (resource_size_t)-1 to fend off big ranges. Analyzed by hpa Reported-and-tested-by: Mikael Pettersson <mikpe@it.uu.se> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* x86/pci: remove rounding quirk from e820_setup_gap()Yinghai Lu2009-05-111-8/+3Star
| | | | | | | | | | | | | | | | | | | | | | | | Now that the e820 code explicitly reserves 'potentially dangerous' free physical memory address space to protect ACPI stolen RAM, there's no need for the rounding quirk in the PCI allocator anymore. Also, this quirk was open-ended iteration that could end up reserving a lot of free space and potentially breaking drivers - such as the one reported by Yannick Roehlly <yannick.roehlly@free.fr> where there's a PCI device with a large memory resource. So remove it. [ Impact: make more of the PCI hole available for assigning pci devices ] Reported-by: Yannick Roehlly <yannick.roehlly@free.fr> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Acked-by: Jesse Barnes <jesse.barnes@intel.com> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <4A01A7C8.5090701@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, e820, pci: reserve extra free space near end of RAMLinus Torvalds2009-05-111-0/+35
| | | | | | | | | | | | | | | | | | | The point is to take all RAM resources we have, and _after_ we've added all the resources we've seen in the E820 tree, we then _also_ try to add fake reserved entries for any "round up to X" at the end of the RAM resources. [ Impact: improve PCI mem-resource allocation robustness, protect "stolen RAM" ] Reported-by: Yannick Roehlly <yannick.roehlly@free.fr> Acked-by: Jesse Barnes <jesse.barnes@intel.com> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: yannick.roehlly@free.fr LKML-Reference: <4A01A784.2050407@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: fix boot hang in early_reserve_e820()Jan Beulich2009-05-081-5/+6
| | | | | | | | | | | | If the first non-reserved (sub-)range doesn't fit the size requested, an endless loop will be entered. If a range returned from find_e820_area_size() turns out insufficient in size, the range must be skipped before calling the function again. [ Impact: fixes boot hang on some platforms ] Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* x86: e820 fix various signedness issues in setup.c and e820.cJaswinder Singh Rajput2009-03-231-5/+5
| | | | | | | | | | | | | | | | | | | | | Impact: cleanup This fixed various signedness issues in setup.c and e820.c: arch/x86/kernel/setup.c:455:53: warning: incorrect type in argument 3 (different signedness) arch/x86/kernel/setup.c:455:53: expected int *pnr_map arch/x86/kernel/setup.c:455:53: got unsigned int extern [toplevel] *<noident> arch/x86/kernel/setup.c:639:53: warning: incorrect type in argument 3 (different signedness) arch/x86/kernel/setup.c:639:53: expected int *pnr_map arch/x86/kernel/setup.c:639:53: got unsigned int extern [toplevel] *<noident> arch/x86/kernel/setup.c:820:54: warning: incorrect type in argument 3 (different signedness) arch/x86/kernel/setup.c:820:54: expected int *pnr_map arch/x86/kernel/setup.c:820:54: got unsigned int extern [toplevel] *<noident> arch/x86/kernel/e820.c:670:53: warning: incorrect type in argument 3 (different signedness) arch/x86/kernel/e820.c:670:53: expected int *pnr_map arch/x86/kernel/e820.c:670:53: got unsigned int [toplevel] *<noident> Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
* x86: print out more info in e820_update_range()Yinghai Lu2009-03-151-21/+35
| | | | | | | | | | Impact: help debug e820 bugs Try to print out more info, to catch wrong call parameters. Signed-off-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <49BCB557.3030000@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: make e820_update_range() handle small range updateYinghai Lu2009-03-141-4/+19
| | | | | | | | | | | Impact: enhance e820 code to handle more cases Try to handle new range which could be covered by one entry. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: jbeulich@novell.com LKML-Reference: <49B9F0C1.10402@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: fix e820_update_range()Yinghai Lu2009-03-131-21/+24
| | | | | | | | | | | | | | | | | | | Impact: fix left range size on head | commit 5c0e6f035df983210e4d22213aed624ced502d3d | x86: fix code paths used by update_mptable | Impact: fix crashes under Xen due to unrobust e820 code fixes one e820 bug, but introduces another bug. Need to update size for left range at first in case it is header. also add __e820_add_region take more parameter. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: jbeulich@novell.com LKML-Reference: <49B9E286.502@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: fix code paths used by update_mptableJan Beulich2009-03-131-7/+25
| | | | | | | | | | | | | | | | | | | | | | | | | Impact: fix crashes under Xen due to unrobust e820 code find_e820_area_size() must return a properly distinguishable and out-of-bounds value when it fails, and -1UL does not meet that criteria on i386/PAE. Additionally, callers of the function must check against that value. early_reserve_e820() should be prepared for the region found to be outside of the addressable range on 32-bits. e820_update_range_map() should not blindly update e820, but should do all it work on the map it got a pointer passed for (which in 50% of the cases is &e820_saved). It must also not call e820_add_region(), as that again acts on e820 unconditionally. The issues were found when trying to make this option work in our Xen kernel (i.e. where some of the silent assumptions made in the code would not hold). Signed-off-by: Jan Beulich <jbeulich@novell.com> LKML-Reference: <49B9171B.76E4.0078.0@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: check range in reserve_early()Yinghai Lu2009-02-241-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup one 32-bit system reports: BIOS-provided physical RAM map: BIOS-e820: 0000000000000000 - 000000000009fc00 (usable) BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved) BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved) BIOS-e820: 0000000000100000 - 000000001c000000 (usable) BIOS-e820: 00000000ffff0000 - 0000000100000000 (reserved) DMI 2.0 present. last_pfn = 0x1c000 max_arch_pfn = 0x100000 kernel direct mapping tables up to 1c000000 @ 7000-c000 .. RAMDISK: 1bc69000 - 1bfef4fa .. 0MB HIGHMEM available. 448MB LOWMEM available. mapped low ram: 0 - 1c000000 low ram: 00000000 - 1c000000 bootmap 00002000 - 00005800 (9 early reservations) ==> bootmem [0000000000 - 001c000000] #0 [0000000000 - 0000001000] BIOS data page ==> [0000000000 - 0000001000] #1 [0000001000 - 0000002000] EX TRAMPOLINE ==> [0000001000 - 0000002000] #2 [0000006000 - 0000007000] TRAMPOLINE ==> [0000006000 - 0000007000] #3 [0000400000 - 00009ed14c] TEXT DATA BSS ==> [0000400000 - 00009ed14c] #4 [001bc69000 - 001bfef4fa] RAMDISK ==> [001bc69000 - 001bfef4fa] #5 [00009ee000 - 00009f2000] INIT_PG_TABLE ==> [00009ee000 - 00009f2000] #6 [000009f400 - 0000100000] BIOS reserved ==> [000009f400 - 0000100000] #7 [0000007000 - 0000007000] PGTABLE #8 [0000002000 - 0000006000] BOOTMAP ==> [0000002000 - 0000006000] Notice the strange blank PGTABLE entry. The reason is init_pg_table is big enough, and zero range is called with init_memory_mapping/reserve_early(). So try to check the range in reserve_early() v2: fix the reversed compare Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: nickpiggin@yahoo.com.au Cc: ink@jurassic.park.msu.ru Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Merge branch 'linus' into releaseLen Brown2009-01-091-16/+0Star
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| * x86: change static allocation of trampoline areaRafael J. Wysocki2008-12-081-16/+0Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: fix trampoline sizing bug, save space While debugging a suspend-to-RAM related issue it occured to me that if the trampoline code had grown past 4 KB, we would have been allocating too little memory for it, since the 4 KB size of the trampoline is hardcoded into arch/x86/kernel/e820.c . Change that by making the kernel compute the trampoline size and allocate as much memory as necessary. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | x86 hibernate: Mark ACPI NVS memory region at startupRafael J. Wysocki2008-12-191-0/+21
|/ | | | | | | | | | Introduce new initcall for marking the ACPI NVS memory at startup, so that it can be saved/restored during hibernation/resume. Based on a patch by Zhang Rui. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Len Brown <len.brown@intel.com>
* x86: Clean up late e820 resource allocationLinus Torvalds2008-11-011-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This makes the late e820 resources use 'insert_resource_expand_to_fit()' instead of doing a 'reserve_region_with_split()', and also avoids marking them as IORESOURCE_BUSY. This results in us being perfectly happy to use pre-existing PCI resources even if they were marked as being in a reserved region, while still avoiding any _new_ allocations in the reserved regions. It also makes for a simpler and more accurate resource tree. Example resource allocation from Jonathan Corbet, who has firmware that has an e820 reserved entry that covered a big range (e0000000-fed003ff), and that had various PCI resources in it set up by firmware. With old kernels, the reserved range would force us to re-allocate all pre-existing PCI resources, and his reserved range would end up looking like this: e0000000-fed003ff : reserved fec00000-fec00fff : IOAPIC 0 fed00000-fed003ff : HPET 0 where only the pre-allocated special regions (IOAPIC and HPET) were kept around. With 2.6.28-rc2, which uses 'reserve_region_with_split()', Jonathan's resource tree looked like this: e0000000-fe7fffff : reserved fe800000-fe8fffff : PCI Bus 0000:01 fe800000-fe8fffff : reserved fe900000-fe9d9aff : reserved fe9d9b00-fe9d9bff : 0000:00:1f.3 fe9d9b00-fe9d9bff : reserved fe9d9c00-fe9d9fff : 0000:00:1a.7 fe9d9c00-fe9d9fff : reserved fe9da000-fe9dafff : 0000:00:03.3 fe9da000-fe9dafff : reserved fe9db000-fe9dbfff : 0000:00:19.0 fe9db000-fe9dbfff : reserved fe9dc000-fe9dffff : 0000:00:1b.0 fe9dc000-fe9dffff : reserved fe9e0000-fe9fffff : 0000:00:19.0 fe9e0000-fe9fffff : reserved fea00000-fea7ffff : 0000:00:02.0 fea00000-fea7ffff : reserved fea80000-feafffff : 0000:00:02.1 fea80000-feafffff : reserved feb00000-febfffff : 0000:00:02.0 feb00000-febfffff : reserved fec00000-fed003ff : reserved fec00000-fec00fff : IOAPIC 0 fed00000-fed003ff : HPET 0 and because the reserved entry had been split and moved into the individual resources, and because it used the IORESOURCE_BUSY flag, the drivers that actually wanted to _use_ those resources couldn't actually attach to them: e1000e 0000:00:19.0: BAR 0: can't reserve mem region [0xfe9e0000-0xfe9fffff] HDA Intel 0000:00:1b.0: BAR 0: can't reserve mem region [0xfe9dc000-0xfe9dffff] with this patch, the resource tree instead becomes e0000000-fed003ff : reserved fe800000-fe8fffff : PCI Bus 0000:01 fe9d9b00-fe9d9bff : 0000:00:1f.3 fe9d9c00-fe9d9fff : 0000:00:1a.7 fe9d9c00-fe9d9fff : ehci_hcd fe9da000-fe9dafff : 0000:00:03.3 fe9db000-fe9dbfff : 0000:00:19.0 fe9db000-fe9dbfff : e1000e fe9dc000-fe9dffff : 0000:00:1b.0 fe9dc000-fe9dffff : ICH HD audio fe9e0000-fe9fffff : 0000:00:19.0 fe9e0000-fe9fffff : e1000e fea00000-fea7ffff : 0000:00:02.0 fea80000-feafffff : 0000:00:02.1 feb00000-febfffff : 0000:00:02.0 fec00000-fec00fff : IOAPIC 0 fed00000-fed003ff : HPET 0 ie the one reserved region now ends up surrounding all the PCI resources that were allocated inside of it by firmware, and because it is not marked BUSY, drivers have no problem attaching to the pre-allocated resources. Reported-and-tested-by: Jonathan Corbet <corbet@lwn.net> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Robert Hancock <hancockr@shaw.ca> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
*---. Merge branches 'core/softlockup', 'core/softirq', 'core/resources', ↵Ingo Molnar2008-10-151-3/+1Star
|\ \ \ | | | | | | | | | | | | 'core/printk' and 'core/misc' into core-v28-for-linus
| | | * generic: redefine resource_size_t as phys_addr_tJeremy Fitzhardinge2008-09-141-3/+1Star
| | |/ | |/| | | | | | | | | | | | | | | | | | | There's no good reason why a resource_size_t shouldn't just be a physical address, so simply redefine it in terms of phys_addr_t. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | Merge commit 'v2.6.27-rc6' into x86/unify-cpu-detectIngo Molnar2008-09-101-1/+1
|\| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: arch/x86/kernel/cpu/amd.c arch/x86/kernel/cpu/common.c arch/x86/kernel/cpu/common_64.c arch/x86/kernel/cpu/feature_names.c include/asm-x86/cpufeature.h Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: fix memmap=exactmap boot argumentPrarit Bhargava2008-09-091-1/+1
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When using kdump modifying the e820 map is yielding strange results. For example starting with BIOS-provided physical RAM map: BIOS-e820: 0000000000000100 - 0000000000093400 (usable) BIOS-e820: 0000000000093400 - 00000000000a0000 (reserved) BIOS-e820: 0000000000100000 - 000000003fee0000 (usable) BIOS-e820: 000000003fee0000 - 000000003fef3000 (ACPI data) BIOS-e820: 000000003fef3000 - 000000003ff80000 (ACPI NVS) BIOS-e820: 000000003ff80000 - 0000000040000000 (reserved) BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved) BIOS-e820: 00000000fec00000 - 00000000fec10000 (reserved) BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved) BIOS-e820: 00000000ff000000 - 0000000100000000 (reserved) and booting with args memmap=exactmap memmap=640K@0K memmap=5228K@16384K memmap=125188K@22252K memmap=76K#1047424K memmap=564K#1047500K resulted in: user-defined physical RAM map: user: 0000000000000000 - 0000000000093400 (usable) user: 0000000000093400 - 00000000000a0000 (reserved) user: 0000000000100000 - 000000003fee0000 (usable) user: 000000003fee0000 - 000000003fef3000 (ACPI data) user: 000000003fef3000 - 000000003ff80000 (ACPI NVS) user: 000000003ff80000 - 0000000040000000 (reserved) user: 00000000e0000000 - 00000000f0000000 (reserved) user: 00000000fec00000 - 00000000fec10000 (reserved) user: 00000000fee00000 - 00000000fee01000 (reserved) user: 00000000ff000000 - 0000000100000000 (reserved) But should have resulted in: user-defined physical RAM map: user: 0000000000000000 - 00000000000a0000 (usable) user: 0000000001000000 - 000000000151b000 (usable) user: 00000000015bb000 - 0000000008ffc000 (usable) user: 000000003fee0000 - 000000003ff80000 (ACPI data) This is happening because of an improper usage of strcmp() in the e820 parsing code. The strcmp() always returns !0 and never resets the value for e820.nr_map and returns an incorrect user-defined map. This patch fixes the problem. Signed-off-by: Prarit Bhargava <prarit@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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