linux/virt, branch v3.12

KVM: use a more sensible error number when debugfs directory creation fails

2013-10-30T11:15:34Z

I don't know if this was due to cut and paste, or somebody was really using a D20 to pick the error code for kvm_init_debugfs as suggested by Linus (EFAULT is 14, so the possibility cannot be entirely ruled out). In any case, this patch fixes it. Reported-by: Tim Gardner Signed-off-by: Paolo Bonzini

Fix NULL dereference in gfn_to_hva_prot()

2013-10-03T07:08:52Z

gfn_to_memslot() can return NULL or invalid slot. We need to check slot validity before accessing it. Reviewed-by: Paolo Bonzini Signed-off-by: Gleb Natapov

kvm: free resources after canceling async_pf

2013-09-17T09:53:15Z

When we cancel 'async_pf_execute()', we should behave as if the work was never scheduled in 'kvm_setup_async_pf()'. Fixes a bug when we can't unload module because the vm wasn't destroyed. Signed-off-by: Radim Krčmář Reviewed-by: Paolo Bonzini Reviewed-by: Gleb Natapov Signed-off-by: Paolo Bonzini

KVM: mmu: allow page tables to be in read-only slots

2013-09-17T09:52:31Z

Page tables in a read-only memory slot will currently cause a triple fault because the page walker uses gfn_to_hva and it fails on such a slot. OVMF uses such a page table; however, real hardware seems to be fine with that as long as the accessed/dirty bits are set. Save whether the slot is readonly, and later check it when updating the accessed and dirty bits. Reviewed-by: Xiao Guangrong Reviewed-by: Gleb Natapov Signed-off-by: Paolo Bonzini

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2013-09-05T15:50:26Z

Pull vfs pile 1 from Al Viro: "Unfortunately, this merge window it'll have a be a lot of small piles - my fault, actually, for not keeping #for-next in anything that would resemble a sane shape ;-/ This pile: assorted fixes (the first 3 are -stable fodder, IMO) and cleanups + %pd/%pD formats (dentry/file pathname, up to 4 last components) + several long-standing patches from various folks. There definitely will be a lot more (starting with Miklos' check_submount_and_drop() series)" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (26 commits) direct-io: Handle O_(D)SYNC AIO direct-io: Implement generic deferred AIO completions add formats for dentry/file pathnames kvm eventfd: switch to fdget powerpc kvm: use fdget switch fchmod() to fdget switch epoll_ctl() to fdget switch copy_module_from_fd() to fdget git simplify nilfs check for busy subtree ibmasmfs: don't bother passing superblock when not needed don't pass superblock to hypfs_{mkdir,create*} don't pass superblock to hypfs_diag_create_files don't pass superblock to hypfs_vm_create_files() oprofile: get rid of pointless forward declarations of struct super_block oprofilefs_create_...() do not need superblock argument oprofilefs_mkdir() doesn't need superblock argument don't bother with passing superblock to oprofile_create_stats_files() oprofile: don't bother with passing superblock to ->create_files() don't bother passing sb to oprofile_create_files() coh901318: don't open-code simple_read_from_buffer() ...

kvm eventfd: switch to fdget

2013-09-04T03:04:45Z

Signed-off-by: Al Viro

ARM: KVM: Bugfix: vgic_bytemap_get_reg per cpu regs

2013-08-30T13:12:38Z

For bytemaps each IRQ field is 1 byte wide, so we pack 4 irq fields in one word and since there are 32 private (per cpu) irqs, we have 8 private u32 fields on the vgic_bytemap struct. We shift the offset from the base of the register group right by 2, giving us the word index instead of the field index. But then there are 8 private words, not 4, which is also why we subtract 8 words from the offset of the shared words. Signed-off-by: Christoffer Dall Signed-off-by: Marc Zyngier Signed-off-by: Gleb Natapov

ARM: KVM: vgic: fix GICD_ICFGRn access

2013-08-30T13:12:16Z

All the code in handle_mmio_cfg_reg() assumes the offset has been shifted right to accomodate for the 2:1 bit compression, but this is only done when getting the register address. Shift the offset early so the code works mostly unchanged. Reported-by: Zhaobo (Bob, ERC) Signed-off-by: Marc Zyngier Signed-off-by: Gleb Natapov

ARM: KVM: vgic: simplify vgic_get_target_reg

2013-08-30T13:03:07Z

vgic_get_target_reg is quite complicated, for no good reason. Actually, it is fairly easy to write it in a much more efficient way by using the target CPU array instead of the bitmap. Signed-off-by: Marc Zyngier Signed-off-by: Gleb Natapov

KVM: rename __kvm_io_bus_sort_cmp to kvm_io_bus_cmp

2013-08-28T06:39:40Z

This is the type-safe comparison function, so the double-underscore is not related. Signed-off-by: Paolo Bonzini Signed-off-by: Gleb Natapov