- 20 7月, 2012 1 次提交
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由 Heiko Carstens 提交于
Remove the file name from the comment at top of many files. In most cases the file name was wrong anyway, so it's rather pointless. Also unify the IBM copyright statement. We did have a lot of sightly different statements and wanted to change them one after another whenever a file gets touched. However that never happened. Instead people start to take the old/"wrong" statements to use as a template for new files. So unify all of them in one go. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
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- 30 10月, 2011 1 次提交
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由 Martin Schwidefsky 提交于
Add prototypes and includes for functions used in different modules. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 23 5月, 2011 2 次提交
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由 Martin Schwidefsky 提交于
Rework the architecture page table functions to access the bits in the page table extension array (pgste). There are a number of changes: 1) Fix missing pgste update if the attach_count for the mm is <= 1. 2) For every operation that affects the invalid bit in the pte or the rcp byte in the pgste the pcl lock needs to be acquired. The function pgste_get_lock gets the pcl lock and returns the current pgste value for a pte pointer. The function pgste_set_unlock stores the pgste and releases the lock. Between these two calls the bits in the pgste can be shuffled. 3) Define two software bits in the pte _PAGE_SWR and _PAGE_SWC to avoid calling SetPageDirty and SetPageReferenced from pgtable.h. If the host reference backup bit or the host change backup bit has been set the dirty/referenced state is transfered to the pte. The common code will pick up the state from the pte. 4) Add ptep_modify_prot_start and ptep_modify_prot_commit for mprotect. 5) Remove pgd_populate_kernel, pud_populate_kernel, pmd_populate_kernel pgd_clear_kernel, pud_clear_kernel, pmd_clear_kernel and ptep_invalidate. 6) Rename kvm_s390_test_and_clear_page_dirty to ptep_test_and_clear_user_dirty and add ptep_test_and_clear_user_young. 7) Define mm_exclusive() and mm_has_pgste() helper to improve readability. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Martin Schwidefsky 提交于
The page_clear_dirty primitive always sets the default storage key which resets the access control bits and the fetch protection bit. That will surprise a KVM guest that sets non-zero access control bits or the fetch protection bit. Merge page_test_dirty and page_clear_dirty back to a single function and only clear the dirty bit from the storage key. In addition move the function page_test_and_clear_dirty and page_test_and_clear_young to page.h where they belong. This requires to change the parameter from a struct page * to a page frame number. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 10 11月, 2010 1 次提交
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由 Hendrik Brueckner 提交于
Provide the devmem_is_allowed() routine to restrict access to kernel memory from userspace. Set the CONFIG_STRICT_DEVMEM config option to switch on checking. Signed-off-by: NHendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 25 10月, 2010 1 次提交
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由 Martin Schwidefsky 提交于
Improve performance of the sske operation by using the nonquiescing variant if the affected page has no mappings established. On machines with no support for the new sske variant the mask bit will be ignored. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 27 2月, 2010 1 次提交
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由 Heiko Carstens 提交于
Some parts of cio do not shift PAGE_DEFAULT_KEY correctly and end up with an incorrect key in their data structures. Since the default key is zero this doesn't really matter. However if somebody would use key-controlled protection for debugging purposes it would be quite helpful if all of this would work as expected. Also remove a stale declaration. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 11 9月, 2009 1 次提交
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由 Heiko Carstens 提交于
Get rid of the PAGE_STATES config option and enable guest page hinting by default. It can be disabled by specifying "cmma=off" at the command line. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 12 6月, 2009 1 次提交
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由 Arnd Bergmann 提交于
The current asm-generic/page.h only contains the get_order function, and asm-generic/uaccess.h only implements unaligned accesses. This renames the file to getorder.h and uaccess-unaligned.h to make room for new page.h and uaccess.h file that will be usable by all simple (e.g. nommu) architectures. Signed-off-by: NRemis Lima Baima <remis.developer@googlemail.com> Signed-off-by: NArnd Bergmann <arnd@arndb.de>
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- 25 12月, 2008 1 次提交
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由 Martin Schwidefsky 提交于
Add a vdso to speed up gettimeofday and clock_getres/clock_gettime for CLOCK_REALTIME/CLOCK_MONOTONIC. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 02 8月, 2008 1 次提交
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由 Martin Schwidefsky 提交于
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 25 7月, 2008 1 次提交
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由 Andrea Righi 提交于
On 32-bit architectures PAGE_ALIGN() truncates 64-bit values to the 32-bit boundary. For example: u64 val = PAGE_ALIGN(size); always returns a value < 4GB even if size is greater than 4GB. The problem resides in PAGE_MASK definition (from include/asm-x86/page.h for example): #define PAGE_SHIFT 12 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) ... #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) The "~" is performed on a 32-bit value, so everything in "and" with PAGE_MASK greater than 4GB will be truncated to the 32-bit boundary. Using the ALIGN() macro seems to be the right way, because it uses typeof(addr) for the mask. Also move the PAGE_ALIGN() definitions out of include/asm-*/page.h in include/linux/mm.h. See also lkml discussion: http://lkml.org/lkml/2008/6/11/237 [akpm@linux-foundation.org: fix drivers/media/video/uvc/uvc_queue.c] [akpm@linux-foundation.org: fix v850] [akpm@linux-foundation.org: fix powerpc] [akpm@linux-foundation.org: fix arm] [akpm@linux-foundation.org: fix mips] [akpm@linux-foundation.org: fix drivers/media/video/pvrusb2/pvrusb2-dvb.c] [akpm@linux-foundation.org: fix drivers/mtd/maps/uclinux.c] [akpm@linux-foundation.org: fix powerpc] Signed-off-by: NAndrea Righi <righi.andrea@gmail.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 07 5月, 2008 1 次提交
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由 Martin Schwidefsky 提交于
Use the existing arch_alloc_page/arch_free_page callbacks to do the guest page state transitions between stable and unused. Acked-by: NRik van Riel <riel@redhat.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 30 4月, 2008 2 次提交
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由 Heiko Carstens 提交于
Convert s390 to SPARSEMEM and SPARSEMEM_VMEMMAP. We do a select of SPARSEMEM_VMEMMAP since it is configurable. This is because SPARSEMEM without SPARSEMEM_VMEMMAP gives us a hell of broken include dependencies that I don't want to fix. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Gerald Schaefer 提交于
This adds hugetlbfs support on System z, using both hardware large page support if available and software large page emulation on older hardware. Shared (large) page tables are implemented in software emulation mode, by using page->index of the first tail page from a compound large page to store page table information. Signed-off-by: NGerald Schaefer <geraldsc@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 10 2月, 2008 1 次提交
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由 Martin Schwidefsky 提交于
This patch implements 1K/2K page table pages for s390. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 09 2月, 2008 1 次提交
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由 Martin Schwidefsky 提交于
Background: I've implemented 1K/2K page tables for s390. These sub-page page tables are required to properly support the s390 virtualization instruction with KVM. The SIE instruction requires that the page tables have 256 page table entries (pte) followed by 256 page status table entries (pgste). The pgstes are only required if the process is using the SIE instruction. The pgstes are updated by the hardware and by the hypervisor for a number of reasons, one of them is dirty and reference bit tracking. To avoid wasting memory the standard pte table allocation should return 1K/2K (31/64 bit) and 2K/4K if the process is using SIE. Problem: Page size on s390 is 4K, page table size is 1K or 2K. That means the s390 version for pte_alloc_one cannot return a pointer to a struct page. Trouble is that with the CONFIG_HIGHPTE feature on x86 pte_alloc_one cannot return a pointer to a pte either, since that would require more than 32 bit for the return value of pte_alloc_one (and the pte * would not be accessible since its not kmapped). Solution: The only solution I found to this dilemma is a new typedef: a pgtable_t. For s390 pgtable_t will be a (pte *) - to be introduced with a later patch. For everybody else it will be a (struct page *). The additional problem with the initialization of the ptl lock and the NR_PAGETABLE accounting is solved with a constructor pgtable_page_ctor and a destructor pgtable_page_dtor. The page table allocation and free functions need to call these two whenever a page table page is allocated or freed. pmd_populate will get a pgtable_t instead of a struct page pointer. To get the pgtable_t back from a pmd entry that has been installed with pmd_populate a new function pmd_pgtable is added. It replaces the pmd_page call in free_pte_range and apply_to_pte_range. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 08 2月, 2008 1 次提交
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由 Kirill A. Shutemov 提交于
asm/elf.h, asm/page.h and asm/user.h don't export to userspace now, so we can drop #ifdef __KERNEL__ for them. [k.shutemov@gmail.com: remove #ifdef __KERNEL_] Signed-off-by: NKirill A. Shutemov <k.shutemov@gmail.com> Reviewed-by: NDavid Woodhouse <dwmw2@infradead.org> Cc: <linux-arch@vger.kernel.org> Signed-off-by: NKirill A. Shutemov <k.shutemov@gmail.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 22 10月, 2007 1 次提交
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由 Martin Schwidefsky 提交于
Get independent from asm-generic/4level-fixup.h Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 12 10月, 2007 1 次提交
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由 Sam Ravnborg 提交于
Replace the hardcoded 4096 value with the PAGE_SIZE macro. Converted a few decimal numbers to readable hex numbers. Use of PAGE_SIZE required a small change to page.h to allow PAGE_SIZE to be used from assembler/linker scripts. Signed-off-by: NSam Ravnborg <sam@ravnborg.org> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 18 7月, 2007 1 次提交
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由 Mel Gorman 提交于
It is often known at allocation time whether a page may be migrated or not. This patch adds a flag called __GFP_MOVABLE and a new mask called GFP_HIGH_MOVABLE. Allocations using the __GFP_MOVABLE can be either migrated using the page migration mechanism or reclaimed by syncing with backing storage and discarding. An API function very similar to alloc_zeroed_user_highpage() is added for __GFP_MOVABLE allocations called alloc_zeroed_user_highpage_movable(). The flags used by alloc_zeroed_user_highpage() are not changed because it would change the semantics of an existing API. After this patch is applied there are no in-kernel users of alloc_zeroed_user_highpage() so it probably should be marked deprecated if this patch is merged. Note that this patch includes a minor cleanup to the use of __GFP_ZERO in shmem.c to keep all flag modifications to inode->mapping in the shmem_dir_alloc() helper function. This clean-up suggestion is courtesy of Hugh Dickens. Additional credit goes to Christoph Lameter and Linus Torvalds for shaping the concept. Credit to Hugh Dickens for catching issues with shmem swap vector and ramfs allocations. [akpm@linux-foundation.org: build fix] [hugh@veritas.com: __GFP_ZERO cleanup] Signed-off-by: NMel Gorman <mel@csn.ul.ie> Cc: Andy Whitcroft <apw@shadowen.org> Cc: Christoph Lameter <clameter@sgi.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 08 12月, 2006 1 次提交
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由 Heiko Carstens 提交于
Virtual memmap support for s390. Inspired by the ia64 implementation. Unlike ia64 we need a mechanism which allows us to dynamically attach shared memory regions. These memory regions are accessed via the dcss device driver. dcss implements the 'direct_access' operation, which requires struct pages for every single shared page. Therefore this implementation provides an interface to attach/detach shared memory: int add_shared_memory(unsigned long start, unsigned long size); int remove_shared_memory(unsigned long start, unsigned long size); The purpose of the add_shared_memory function is to add the given memory range to the 1:1 mapping and to make sure that the corresponding range in the vmemmap is backed with physical pages. It also initialises the new struct pages. remove_shared_memory in turn only invalidates the page table entries in the 1:1 mapping. The page tables and the memory used for struct pages in the vmemmap are currently not freed. They will be reused when the next segment will be attached. Given that the maximum size of a shared memory region is 2GB and in addition all regions must reside below 2GB this is not too much of a restriction, but there is room for improvement. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 05 10月, 2006 1 次提交
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由 Heiko Carstens 提交于
Use page_to_phys and pfn_to_page to avoid open-coded mem_map usage. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
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- 28 9月, 2006 1 次提交
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由 Martin Schwidefsky 提交于
Major cleanup of all s390 inline assemblies. They now have a common coding style. Quite a few have been shortened, mainly by using register asm variables. Use of the EX_TABLE macro helps as well. The atomic ops, bit ops and locking inlines new use the Q-constraint if a newer gcc is used. That results in slightly better code. Thanks to Christian Borntraeger for proof reading the changes. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 27 4月, 2006 1 次提交
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由 David Woodhouse 提交于
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>
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- 28 3月, 2006 1 次提交
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由 KAMEZAWA Hiroyuki 提交于
s390 can use generic funcs. Signed-off-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 05 9月, 2005 1 次提交
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由 Stephen Rothwell 提交于
Someone mentioned that almost all the architectures used basically the same implementation of get_order. This patch consolidates them into asm-generic/page.h and includes that in the appropriate places. The exceptions are ia64 and ppc which have their own (presumably optimised) versions. Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 01 5月, 2005 1 次提交
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由 Peter Oberparleiter 提交于
Provide an easy way to define a non-zero storage key at compile time. This is useful for debugging purposes. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 17 4月, 2005 1 次提交
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由 Linus Torvalds 提交于
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!
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