1. 02 10月, 2006 29 次提交
  2. 01 10月, 2006 11 次提交
    • L
      Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/agpgart · 82965add
      Linus Torvalds 提交于
      * master.kernel.org:/pub/scm/linux/kernel/git/davej/agpgart:
        [AGPGART] printk fixups.
        [AGPGART] Use pci_get_slot not pci_find_slot
      82965add
    • L
      Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq · f0b364a1
      Linus Torvalds 提交于
      * master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq:
        [CPUFREQ] Make acpi-cpufreq unsticky again.
        [CPUFREQ] longhaul: remove duplicated code.
        [CPUFREQ] Longhaul - Disable arbiter CLE266
        [CPUFREQ] Fix section mismatch warning
        [CPUFREQ] Fix cut-n-paste bug in suspend printk
      f0b364a1
    • Z
      [PATCH] Some config.h removals · 5a73fdc5
      Zachary Amsden 提交于
      During tracking down a PAE compile failure, I found that config.h was being
      included in a bunch of places in i386 code.  It is no longer necessary, so
      drop it.
      Signed-off-by: NZachary Amsden <zach@vmware.com>
      Cc: Rusty Russell <rusty@rustcorp.com.au>
      Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
      Cc: Andi Kleen <ak@suse.de>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      5a73fdc5
    • Z
      [PATCH] paravirt: update pte hook · 789e6ac0
      Zachary Amsden 提交于
      Add a pte_update_hook which notifies about pte changes that have been made
      without using the set_pte / clear_pte interfaces.  This allows shadow mode
      hypervisors which do not trap on page table access to maintain synchronized
      shadows.
      
      It also turns out, there was one pte update in PAE mode that wasn't using any
      accessor interface at all for setting NX protection.  Considering it is PAE
      specific, and the accessor is i386 specific, I didn't want to add a generic
      encapsulation of this behavior yet.
      Signed-off-by: NZachary Amsden <zach@vmware.com>
      Cc: Rusty Russell <rusty@rustcorp.com.au>
      Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
      Cc: Andi Kleen <ak@suse.de>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      789e6ac0
    • Z
      [PATCH] paravirt: remove set pte atomic · a93cb055
      Zachary Amsden 提交于
      Now that ptep_establish has a definition in PAE i386 3-level paging code, the
      only paging model which is insane enough to have multi-word hardware PTEs
      which are not efficient to set atomically, we can remove the ghost of
      set_pte_atomic from other architectures which falesly duplicated it, and
      remove all knowledge of it from the generic pgtable code.
      
      set_pte_atomic is now a private pte operator which is specific to i386
      Signed-off-by: NZachary Amsden <zach@vmware.com>
      Cc: Rusty Russell <rusty@rustcorp.com.au>
      Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
      Cc: Andi Kleen <ak@suse.de>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      a93cb055
    • Z
      [PATCH] paravirt: optimize ptep establish for pae · d6d861e3
      Zachary Amsden 提交于
      The ptep_establish macro is only used on user-level PTEs, for P->P mapping
      changes.  Since these always happen under protection of the pagetable lock,
      the strong synchronization of a 64-bit cmpxchg is not needed, in fact, not
      even a lock prefix needs to be used.  We can simply instead clear the P-bit,
      followed by a normal set.  The write ordering is still important to avoid the
      possibility of the TLB snooping a partially written PTE and getting a bad
      mapping installed.
      Signed-off-by: NZachary Amsden <zach@vmware.com>
      Cc: Rusty Russell <rusty@rustcorp.com.au>
      Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
      Cc: Andi Kleen <ak@suse.de>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      d6d861e3
    • Z
      [PATCH] paravirt: kpte flush · 23002d88
      Zachary Amsden 提交于
      Create a new PTE function which combines clearing a kernel PTE with the
      subsequent flush.  This allows the two to be easily combined into a single
      hypercall or paravirt-op.  More subtly, reverse the order of the flush for
      kmap_atomic.  Instead of flushing on establishing a mapping, flush on clearing
      a mapping.  This eliminates the possibility of leaving stale kmap entries
      which may still have valid TLB mappings.  This is required for direct mode
      hypervisors, which need to reprotect all mappings of a given page when
      changing the page type from a normal page to a protected page (such as a page
      table or descriptor table page).  But it also provides some nicer semantics
      for real hardware, by providing extra debug-proofing against using stale
      mappings, as well as ensuring that no stale mappings exist when changing the
      cacheability attributes of a page, which could lead to cache conflicts when
      two different types of mappings exist for the same page.
      Signed-off-by: NZachary Amsden <zach@vmware.com>
      Cc: Rusty Russell <rusty@rustcorp.com.au>
      Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
      Cc: Andi Kleen <ak@suse.de>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      23002d88
    • Z
      [PATCH] paravirt: combine flush accessed dirty.patch · 25e4df5b
      Zachary Amsden 提交于
      Remove ptep_test_and_clear_{dirty|young} from i386, and instead use the
      dominating functions, ptep_clear_flush_{dirty|young}.  This allows the TLB
      page flush to be contained in the same macro, and allows for an eager
      optimization - if reading the PTE initially returned dirty/accessed, we can
      assume the fact that no subsequent update to the PTE which cleared accessed /
      dirty has occurred, as the only way A/D bits can change without holding the
      page table lock is if a remote processor clears them.  This eliminates an
      extra branch which came from the generic version of the code, as we know that
      no other CPU could have cleared the A/D bit, so the flush will always be
      needed.
      
      We still export these two defines, even though we do not actually define
      the macros in the i386 code:
      
       #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
       #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
      
      The reason for this is that the only use of these functions is within the
      generic clear_flush functions, and we want a strong guarantee that there
      are no other users of these functions, so we want to prevent the generic
      code from defining them for us.
      Signed-off-by: NZachary Amsden <zach@vmware.com>
      Cc: Rusty Russell <rusty@rustcorp.com.au>
      Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
      Cc: Andi Kleen <ak@suse.de>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      25e4df5b
    • Z
      [PATCH] paravirt: lazy mmu mode hooks.patch · 6606c3e0
      Zachary Amsden 提交于
      Implement lazy MMU update hooks which are SMP safe for both direct and shadow
      page tables.  The idea is that PTE updates and page invalidations while in
      lazy mode can be batched into a single hypercall.  We use this in VMI for
      shadow page table synchronization, and it is a win.  It also can be used by
      PPC and for direct page tables on Xen.
      
      For SMP, the enter / leave must happen under protection of the page table
      locks for page tables which are being modified.  This is because otherwise,
      you end up with stale state in the batched hypercall, which other CPUs can
      race ahead of.  Doing this under the protection of the locks guarantees the
      synchronization is correct, and also means that spurious faults which are
      generated during this window by remote CPUs are properly handled, as the page
      fault handler must re-check the PTE under protection of the same lock.
      Signed-off-by: NZachary Amsden <zach@vmware.com>
      Signed-off-by: NJeremy Fitzhardinge <jeremy@xensource.com>
      Cc: Rusty Russell <rusty@rustcorp.com.au>
      Cc: Andi Kleen <ak@suse.de>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      6606c3e0
    • Z
      [PATCH] paravirt: pte clear not present · 9888a1ca
      Zachary Amsden 提交于
      Change pte_clear_full to a more appropriately named pte_clear_not_present,
      allowing optimizations when not-present mapping changes need not be reflected
      in the hardware TLB for protected page table modes.  There is also another
      case that can use it in the fremap code.
      Signed-off-by: NZachary Amsden <zach@vmware.com>
      Signed-off-by: NJeremy Fitzhardinge <jeremy@xensource.com>
      Cc: Rusty Russell <rusty@rustcorp.com.au>
      Cc: Andi Kleen <ak@suse.de>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      9888a1ca
    • Z
      [PATCH] paravirt: remove read hazard from cow · 3dc90795
      Zachary Amsden 提交于
      We don't want to read PTEs directly like this after they have been modified,
      as a lazy MMU implementation of direct page tables may not have written the
      updated PTE back to memory yet.
      Signed-off-by: NZachary Amsden <zach@vmware.com>
      Signed-off-by: NJeremy Fitzhardinge <jeremy@xensource.com>
      Cc: Rusty Russell <rusty@rustcorp.com.au>
      Cc: Andi Kleen <ak@suse.de>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      3dc90795