1. 31 Mar, 2015 4 commits
    • Jens Freimann's avatar
      KVM: s390: deliver floating interrupts in order of priority · 6d3da241
      Jens Freimann authored
      This patch makes interrupt handling compliant to the z/Architecture
      Principles of Operation with regard to interrupt priorities.
      
      Add a bitmap for pending floating interrupts. Each bit relates to a
      interrupt type and its list. A turned on bit indicates that a list
      contains items (interrupts) which need to be delivered.  When delivering
      interrupts on a cpu we can merge the existing bitmap for cpu-local
      interrupts and floating interrupts and have a single mechanism for
      delivery.
      Currently we have one list for all kinds of floating interrupts and a
      corresponding spin lock. This patch adds a separate list per
      interrupt type. An exception to this are service signal and machine check
      interrupts, as there can be only one pending interrupt at a time.
      Signed-off-by: default avatarJens Freimann <jfrei@linux.vnet.ibm.com>
      Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
      Acked-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
      6d3da241
    • Jens Freimann's avatar
      KVM: s390: fix get_all_floating_irqs · 94aa033e
      Jens Freimann authored
      This fixes a bug introduced with commit c05c4186 ("KVM: s390:
      add floating irq controller").
      
      get_all_floating_irqs() does copy_to_user() while holding
      a spin lock. Let's fix this by filling a temporary buffer
      first and copy it to userspace after giving up the lock.
      
      Cc: <stable@vger.kernel.org> # 3.18+: 69a8d456 KVM: s390: no need to hold...
      Reviewed-by: default avatarDavid Hildenbrand <dahi@linux.vnet.ibm.com>
      Signed-off-by: default avatarJens Freimann <jfrei@linux.vnet.ibm.com>
      Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
      Acked-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
      94aa033e
    • Christian Borntraeger's avatar
      KVM: s390: enable more features that need no hypervisor changes · a3ed8dae
      Christian Borntraeger authored
      After some review about what these facilities do, the following
      facilities will work under KVM and can, therefore, be reported
      to the guest if the cpu model and the host cpu provide this bit.
      
      There are plans underway to make the whole bit thing more readable,
      but its not yet finished. So here are some last bit changes and
      we enhance the KVM mask with:
      
      9 The sense-running-status facility is installed in the
        z/Architecture architectural mode.
        ---> handled by SIE or KVM
      
      10 The conditional-SSKE facility is installed in the
         z/Architecture architectural mode.
        ---> handled by SIE. KVM will retry SIE
      
      13 The IPTE-range facility is installed in the
         z/Architecture architectural mode.
        ---> handled by SIE. KVM will retry SIE
      
      36 The enhanced-monitor facility is installed in the
         z/Architecture architectural mode.
        ---> handled by SIE
      
      47 The CMPSC-enhancement facility is installed in the
         z/Architecture architectural mode.
        ---> handled by SIE
      
      48 The decimal-floating-point zoned-conversion facility
         is installed in the z/Architecture architectural mode.
        ---> handled by SIE
      
      49 The execution-hint, load-and-trap, miscellaneous-
         instruction-extensions and processor-assist
        ---> handled by SIE
      
      51 The local-TLB-clearing facility is installed in the
         z/Architecture architectural mode.
        ---> handled by SIE
      
      52 The interlocked-access facility 2 is installed.
        ---> handled by SIE
      
      53 The load/store-on-condition facility 2 and load-and-
         zero-rightmost-byte facility are installed in the
         z/Architecture architectural mode.
        ---> handled by SIE
      
      57 The message-security-assist-extension-5 facility is
        installed in the z/Architecture architectural mode.
        ---> handled by SIE
      
      66 The reset-reference-bits-multiple facility is installed
        in the z/Architecture architectural mode.
        ---> handled by SIE. KVM will retry SIE
      
      80 The decimal-floating-point packed-conversion
         facility is installed in the z/Architecture architectural
         mode.
        ---> handled by SIE
      Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
      Tested-by: default avatarMichael Mueller <mimu@linux.vnet.ibm.com>
      Acked-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
      a3ed8dae
    • David Hildenbrand's avatar
      KVM: s390: store the breaking-event address on pgm interrupts · 2ba45968
      David Hildenbrand authored
      If the PER-3 facility is installed, the breaking-event address is to be
      stored in the low core.
      
      There is no facility bit for PER-3 in stfl(e) and Linux always uses the
      value at address 272 no matter if PER-3 is available or not.
      We can't hide its existence from the guest. All program interrupts
      injected via the SIE automatically store this information if the PER-3
      facility is available in the hypervisor. Also the itdb contains the
      address automatically.
      
      As there is no switch to turn this mechanism off, let's simply make it
      consistent and also store the breaking event address in case of manual
      program interrupt injection.
      Reviewed-by: default avatarJens Freimann <jfrei@linux.vnet.ibm.com>
      Signed-off-by: default avatarDavid Hildenbrand <dahi@linux.vnet.ibm.com>
      Reviewed-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
      Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
      Acked-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
      2ba45968
  2. 17 Mar, 2015 11 commits
  3. 06 Mar, 2015 15 commits
  4. 04 Mar, 2015 4 commits
  5. 03 Mar, 2015 1 commit
  6. 23 Feb, 2015 3 commits
    • Linus Torvalds's avatar
      Linux 4.0-rc1 · c517d838
      Linus Torvalds authored
      .. after extensive statistical analysis of my G+ polling, I've come to
      the inescapable conclusion that internet polls are bad.
      
      Big surprise.
      
      But "Hurr durr I'ma sheep" trounced "I like online polls" by a 62-to-38%
      margin, in a poll that people weren't even supposed to participate in.
      Who can argue with solid numbers like that? 5,796 votes from people who
      can't even follow the most basic directions?
      
      In contrast, "v4.0" beat out "v3.20" by a slimmer margin of 56-to-44%,
      but with a total of 29,110 votes right now.
      
      Now, arguably, that vote spread is only about 3,200 votes, which is less
      than the almost six thousand votes that the "please ignore" poll got, so
      it could be considered noise.
      
      But hey, I asked, so I'll honor the votes.
      c517d838
    • Linus Torvalds's avatar
      Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 · feaf2229
      Linus Torvalds authored
      Pull ext4 fixes from Ted Ts'o:
       "Ext4 bug fixes.
      
        We also reserved code points for encryption and read-only images (for
        which the implementation is mostly just the reserved code point for a
        read-only feature :-)"
      
      * tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
        ext4: fix indirect punch hole corruption
        ext4: ignore journal checksum on remount; don't fail
        ext4: remove duplicate remount check for JOURNAL_CHECKSUM change
        ext4: fix mmap data corruption in nodelalloc mode when blocksize < pagesize
        ext4: support read-only images
        ext4: change to use setup_timer() instead of init_timer()
        ext4: reserve codepoints used by the ext4 encryption feature
        jbd2: complain about descriptor block checksum errors
      feaf2229
    • Linus Torvalds's avatar
      Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · be5e6616
      Linus Torvalds authored
      Pull more vfs updates from Al Viro:
       "Assorted stuff from this cycle.  The big ones here are multilayer
        overlayfs from Miklos and beginning of sorting ->d_inode accesses out
        from David"
      
      * 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (51 commits)
        autofs4 copy_dev_ioctl(): keep the value of ->size we'd used for allocation
        procfs: fix race between symlink removals and traversals
        debugfs: leave freeing a symlink body until inode eviction
        Documentation/filesystems/Locking: ->get_sb() is long gone
        trylock_super(): replacement for grab_super_passive()
        fanotify: Fix up scripted S_ISDIR/S_ISREG/S_ISLNK conversions
        Cachefiles: Fix up scripted S_ISDIR/S_ISREG/S_ISLNK conversions
        VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry)
        SELinux: Use d_is_positive() rather than testing dentry->d_inode
        Smack: Use d_is_positive() rather than testing dentry->d_inode
        TOMOYO: Use d_is_dir() rather than d_inode and S_ISDIR()
        Apparmor: Use d_is_positive/negative() rather than testing dentry->d_inode
        Apparmor: mediated_filesystem() should use dentry->d_sb not inode->i_sb
        VFS: Split DCACHE_FILE_TYPE into regular and special types
        VFS: Add a fallthrough flag for marking virtual dentries
        VFS: Add a whiteout dentry type
        VFS: Introduce inode-getting helpers for layered/unioned fs environments
        Infiniband: Fix potential NULL d_inode dereference
        posix_acl: fix reference leaks in posix_acl_create
        autofs4: Wrong format for printing dentry
        ...
      be5e6616
  7. 22 Feb, 2015 2 commits