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2008-07-10x86: overmapped fix when 4K pages on tail, 64-bitYinghai Lu
fix phys_pmd_init to make sure not to return bigger value than end. also print out range split:1G/2M/4K in init_memory_mapping(). Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Cc: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-09x86: not overmap more than the end of RAM in init_memory_mapping - 64bitYinghai Lu
handle head and tail that are not aligned to big pages (2MB/1GB boundary). with this patch, on system that support gbpages, change: last_map_addr: 1080000000 end: 1078000000 to: last_map_addr: 1078000000 end: 1078000000 Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-09x86: fix vmemmap printout checkYinghai Lu
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Cc: "Nick Piggin" <npiggin@suse.de> Cc: "Mark McLoughlin" <markmc@redhat.com> Cc: xen-devel <xen-devel@lists.xensource.com> Cc: "Eduardo Habkost" <ehabkost@redhat.com> Cc: "Vegard Nossum" <vegard.nossum@gmail.com> Cc: "Stephen Tweedie" <sct@redhat.com> Cc: "Jeremy Fitzhardinge" <jeremy@goop.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-09x86: introduce page_size_mask for 64bitYinghai Lu
prepare for overmapped patch also printout last_map_addr together with end Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-09arch/x86/mm/pgtable_32.c: remove unused variable `fixmaps'Andrew Morton
arch/x86/mm/pgtable_32.c:144: warning: 'fixmaps' defined but not used Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-09x86: map UV chipset space - pagetableJack Steiner
Add boot-time function for creating additional 2MB page table entries for mapping chipset specific cached/uncached ranges. Signed-off-by: Jack Steiner <steiner@sgi.com> Cc: linux-mm@kvack.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: remove acpi_srat config v2Yinghai Lu
use ACPI_NUMA directly and move srat_32.c to mm/ Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: remove have_arch_parse_srat -v2Yinghai Lu
we already have the same srat handling interface for 32bit. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86/cpa: use an undefined PTE bit for testing CPAJeremy Fitzhardinge
Rather than using _PAGE_GLOBAL - which not all CPUs support - to test CPA, use one of the reserved-for-software-use PTE flags instead. This allows CPA testing to work on CPUs which don't support PGD. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86_32: remove __PAGE_KERNEL(_EXEC)Jeremy Fitzhardinge
From: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Older x86-32 processors do not support global mappings (PGD), so must only use it if the processor supports it. The _PAGE_KERNEL* flags always have _PAGE_KERNEL set, since logically we always want it set. This is OK even on processors which do not support PGD, since all _PAGE flags are masked with __supported_pte_mask before being turned into a real in-pagetable pte. On 32-bit systems, __supported_pte_mask is initialized to not contain _PAGE_GLOBAL, and it is then added if the CPU is found to support it. The x86-32 code used to use __PAGE_KERNEL/__PAGE_KERNEL_EXEC for this purpose, but they're now redundant and can be removed. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86_64/setup: unconditionally populate the pgdJeremy Fitzhardinge
When allocating a new pud, unconditionally populate the pgd (why did we bother to create a new pud if we weren't going to populate it?). This will only happen if the pgd slot was empty, since any existing pud will be reused. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: merge zones_sizes_init for numa and non numa on 32-bitYinghai Lu
move out e820_register_active_regions from non numa zones_sizes_init() and remove numa version zones_sizes_init(). and let 32 bit call remove_all_active_ranges() in setup_arch() directly like 64-bit Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: don't reallocate pgt for node0Yinghai Lu
kva ram already mapped right after away, so don't need to get that for low ram. avoid wasting one copy of pgdat. also add node id in early_res name in case we get it from find_e820_area. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: fix init_memory_mapping over boundary, v4Yinghai Lu
use PMD_SHIFT to calculate boundary also adjust size for pre-allocated table size Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: fix init_memory_mapping over boundary v3Yinghai Lu
some ram-end boundary only has page alignment, instead of 2M alignment. v2: make init_memory_mapping more solid: start could be any value other than 0 v3: fix NON PAE by handling left over in kernel_physical_mapping Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86/paravirt: groundwork for 64-bit Xen support, fix #2Jeremy Fitzhardinge
Ingo Molnar wrote: > that fixed the build but now we've got a boot crash with this config: > > time.c: Detected 2010.304 MHz processor. > spurious 8259A interrupt: IRQ7. > BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 > IP: [<0000000000000000>] > PGD 0 > Thread overran stack, or stack corrupted > Oops: 0010 [1] SMP > CPU 0 > I don't know if this will fix this bug, but it's definitely a bugfix. It was trashing random pages by overwriting them with pagetables... Don't trash a large pmd's data when mapping physical memory. This is a bugfix for "x86_64: adjust mapping of physical pagetables to work with Xen". Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: xen-devel <xen-devel@lists.xensource.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Cc: Vegard Nossum <vegard.nossum@gmail.com> Cc: Nick Piggin <npiggin@suse.de> Cc: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: move fix mapping page table range earlyYinghai Lu
do that in init_memory_mapping also remove one init_ohci1394_dma_on_all_controllers Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: fix pte allocation in "x86: introduce init_memory_mapping for 32bit"Jeremy Fitzhardinge
The patch "x86: introduce init_memory_mapping for 32bit" does not allocate enough space for PTEs if the CPU does not implement PSE. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Acked-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86, 64-bit: split set_pte_vaddr()Eduardo Habkost
We will need to set a pte on l3_user_pgt. Extract set_pte_vaddr_pud() from set_pte_vaddr(), that will accept the l3 page table as parameter. This change should be a no-op for existing code. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: xen-devel <xen-devel@lists.xensource.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86, 64-bit: create small vmemmap mappings if PSE not availableJeremy Fitzhardinge
If PSE is not available, then fall back to 4k page mappings for the vmemmap area. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: xen-devel <xen-devel@lists.xensource.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86, 64-bit: adjust mapping of physical pagetables to work with XenJeremy Fitzhardinge
This makes a few of changes to the construction of the initial pagetables to work better with paravirt_ops/Xen. The main areas are: 1. Support non-PSE mapping of memory, since Xen doesn't currently allow 2M pages to be mapped in guests. 2. Make sure that the ioremap alias of all pages are dropped before attaching the new page to the pagetable. This avoids having writable aliases of pagetable pages. 3. Preserve existing pagetable entries, rather than overwriting. Its possible that a fair amount of pagetable has already been constructed, so reuse what's already in place rather than ignoring and overwriting it. The algorithm relies on the invariant that any page which is part of the kernel pagetable is itself mapped in the linear memory area. This way, it can avoid using ioremap on a pagetable page. The invariant holds because it maps memory from low to high addresses, and also allocates memory from low to high. Each allocated page can map at least 2M of address space, so the mapped area will always progress much faster than the allocated area. It relies on the early boot code mapping enough pages to get started. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: xen-devel <xen-devel@lists.xensource.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: preallocate and prepopulate separatelyJeremy Fitzhardinge
Jan Beulich points out that vmalloc_sync_all() assumes that the kernel's pmd is always expected to be present in the pgd. The current pgd construction code will add the pgd to the pgd_list before its pmds have been pre-populated, thereby making it visible to vmalloc_sync_all(). However, because pgd_prepopulate_pmd also does the allocation, it may block and cannot be done under spinlock. The solution is to preallocate the pmds out of the spinlock, then populate them while holding the pgd_list lock. This patch also pulls the pmd preallocation and mop-up functions out to be common, assuming that the compiler will generate no code for them when PREALLOCTED_PMDS is 0. Also, there's no need for pgd_ctor to clear the pgd again, since it's allocated as a zeroed page. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: xen-devel <xen-devel@lists.xensource.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86/paravirt: add a pgd_alloc/free hooksJeremy Fitzhardinge
Add hooks which are called at pgd_alloc/free time. The pgd_alloc hook may return an error code, which if non-zero, causes the pgd allocation to be failed. The hooks may be used to allocate/free auxillary per-pgd information. also fix: > * Ingo Molnar <mingo@elte.hu> wrote: > > include/asm/pgalloc.h: In function ‘paravirt_pgd_free': > include/asm/pgalloc.h:14: error: parameter name omitted > arch/x86/kernel/entry_64.S: In file included from > arch/x86/kernel/traps_64.c:51:include/asm/pgalloc.h: In function ‘paravirt_pgd_free': > include/asm/pgalloc.h:14: error: parameter name omitted Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: xen-devel <xen-devel@lists.xensource.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: simplify vmalloc_sync_allJeremy Fitzhardinge
vmalloc_sync_all() is only called from register_die_notifier and alloc_vm_area. Neither is on any performance-critical paths, so vmalloc_sync_all() itself is not on any hot paths. Given that the optimisations in vmalloc_sync_all add a fair amount of code and complexity, and are fairly hard to evaluate for correctness, it's better to just remove them to simplify the code rather than worry about its absolute performance. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: xen-devel <xen-devel@lists.xensource.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: remove end_pfn in 64bitYinghai Lu
and use max_pfn directly. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: add table_top check for alloc_low_page in 64 bitYinghai Lu
that range is from find_e820_area, so don't try to use end_pfn to see if out of boundary...use table_top instead to avoid possible strange result while cross the boundary... also change early_printk to printk, because init_memory_mapping is after early param parsing, and console=uart8250 already working at that time. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: get max_pfn_mapped in init_memory_mappingYinghai Lu
so don't shift that in the loop Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: introduce init_memory_mapping for 32bit #3Yinghai Lu
move kva related early backto initmem_init for numa32 Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: introduce init_memory_mapping for 32bit #2Yinghai Lu
moving relocate_initrd early Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: introduce init_memory_mapping for 32bit #1Yinghai Lu
... so can we use mem below max_low_pfn earlier. this allows us to move several functions more early instead of waiting to after paging_init. That includes moving relocate_initrd() earlier in the bootup, and kva related early setup done in initmem_init. (in followup patches) Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86, 64-bit: unify early_ioremapJeremy Fitzhardinge
The 32-bit early_ioremap will work equally well for 64-bit, so just use it. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: xen-devel <xen-devel@lists.xensource.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86, 64-bit: use p??_populate() to attach pages to pagetableJeremy Fitzhardinge
Use the _populate() functions to attach new pages to a pagetable, to make sure the right paravirt_ops calls get called. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: xen-devel <xen-devel@lists.xensource.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: move some func calling from setup_arch to paging_initYinghai Lu
those function depend on paging setup pgtable, so they could access the ram in bootmem region but just get mapped. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: numa32 pfn print out using hex insteadYinghai Lu
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: fix compile warning in init_64.cYinghai Lu
len is long and ret is only for NUMA Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: clean up min_low_pfnYinghai Lu
for 32bit we already had early_res support, so don't need to track min_low_pfn. keep it to 0 always. also use init_bootmem_node instead of init_bootmem, so don't touch min_low_pfn. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: clean up using max_low_pfn on 32-bitYinghai Lu
so that max_low_pfn is not changed after it is set. so we can move that early and out of initmem_init. could call find_low_pfn_range just after max_pfn is set. also could move reserve_initrd out of setup_bootmem_allocator so 32bit is more like 64bit. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: move reservetop and vmalloc parsing to pgtable_32.cYinghai Lu
also change reserve_top_address to __init attibute Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: move find_max_low_pfn to init_32.cYinghai Lu
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: introduce reserve_initrdYinghai Lu
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: introduce initmem_init for 32 bitYinghai Lu
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: introduce initmem_init for 64 bitYinghai Lu
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08RFC x86: try to remove arch_get_ram_rangeYinghai Lu
want to remove arch_get_ram_range, and use early_node_map instead. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08build: add __page_aligned_data and __page_aligned_bssJeremy Fitzhardinge
Making a variable page-aligned by using __attribute__((section(".data.page_aligned"))) is fragile because if sizeof(variable) is not also a multiple of page size, it leaves variables in the remainder of the section unaligned. This patch introduces two new qualifiers, __page_aligned_data and __page_aligned_bss to set the section *and* the alignment of variables. This makes page-aligned variables more robust because the linker will make sure they're aligned properly. Unfortunately it requires *all* page-aligned data to use these macros... Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08Merge branch 'x86/fixmap' into x86/develIngo Molnar
Conflicts: arch/x86/mm/init_64.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08Merge branch 'x86/numa' into x86/develIngo Molnar
Conflicts: arch/x86/Kconfig arch/x86/kernel/e820.c arch/x86/kernel/efi_64.c arch/x86/kernel/mpparse.c arch/x86/kernel/setup.c arch/x86/kernel/setup_32.c arch/x86/mm/init_64.c include/asm-x86/proto.h Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: add flags parameter to reserve_bootmem_generic()Bernhard Walle
This patch adds a 'flags' parameter to reserve_bootmem_generic() like it already has been added in reserve_bootmem() with commit 72a7fe3967dbf86cb34e24fbf1d957fe24d2f246. It also changes all users to use BOOTMEM_DEFAULT, which doesn't effectively change the behaviour. Since the change is x86-specific, I don't think it's necessary to add a new API for migration. There are only 4 users of that function. The change is necessary for the next patch, using reserve_bootmem_generic() for crashkernel reservation. Signed-off-by: Bernhard Walle <bwalle@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: numa_64.c fix shadowed variableThomas Gleixner
sparse mutters: arch/x86/mm/numa_64.c:195:27: warning: symbol 'end_pfn' shadows an earlier one Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: numa_64.c make local variables staticThomas Gleixner
plat_node_bdata, cmdline, nodemap_addr, nodemap_size are local to numa_64.c. Make them static Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08x86: remove the static 256k node_to_cpumask_mapMike Travis
* Consolidate node_to_cpumask operations and remove the 256k byte node_to_cpumask_map. This is done by allocating the node_to_cpumask_map array after the number of possible nodes (nr_node_ids) is known. * Debug printouts when CONFIG_DEBUG_PER_CPU_MAPS is active have been increased. It now shows faults when calling node_to_cpumask() and node_to_cpumask_ptr(). For inclusion into sched-devel/latest tree. Based on: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git + sched-devel/latest .../mingo/linux-2.6-sched-devel.git Signed-off-by: Mike Travis <travis@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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