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  1. 10 1月, 2013 2 次提交
    • A
      KVM: PPC: BookE: Implement EPR exit · 1c810636
      由 Alexander Graf 提交于 
      The External Proxy Facility in FSL BookE chips allows the interrupt
controller to automatically acknowledge an interrupt as soon as a
core gets its pending external interrupt delivered.

Today, user space implements the interrupt controller, so we need to
check on it during such a cycle.

This patch implements logic for user space to enable EPR exiting,
disable EPR exiting and EPR exiting itself, so that user space can
acknowledge an interrupt when an external interrupt has successfully
been delivered into the guest vcpu.
Signed-off-by: NAlexander Graf <agraf@suse.de>
      1c810636
    • A
      KVM: PPC: Only WARN on invalid emulation · 5a33169e
      由 Alexander Graf 提交于 
      When we hit an emulation result that we didn't expect, that is an error,
but it's nothing that warrants a BUG(), because it can be guest triggered.

So instead, let's only WARN() the user that this happened.
Signed-off-by: NAlexander Graf <agraf@suse.de>
      5a33169e
  3. 14 12月, 2012 1 次提交
  5. 06 12月, 2012 2 次提交
    • P
      KVM: PPC: Book3S HV: Provide a method for userspace to read and write the HPT · a2932923
      由 Paul Mackerras 提交于 
      A new ioctl, KVM_PPC_GET_HTAB_FD, returns a file descriptor.  Reads on
this fd return the contents of the HPT (hashed page table), writes
create and/or remove entries in the HPT.  There is a new capability,
KVM_CAP_PPC_HTAB_FD, to indicate the presence of the ioctl.  The ioctl
takes an argument structure with the index of the first HPT entry to
read out and a set of flags.  The flags indicate whether the user is
intending to read or write the HPT, and whether to return all entries
or only the "bolted" entries (those with the bolted bit, 0x10, set in
the first doubleword).

This is intended for use in implementing qemu's savevm/loadvm and for
live migration.  Therefore, on reads, the first pass returns information
about all HPTEs (or all bolted HPTEs).  When the first pass reaches the
end of the HPT, it returns from the read.  Subsequent reads only return
information about HPTEs that have changed since they were last read.
A read that finds no changed HPTEs in the HPT following where the last
read finished will return 0 bytes.

The format of the data provides a simple run-length compression of the
invalid entries.  Each block of data starts with a header that indicates
the index (position in the HPT, which is just an array), the number of
valid entries starting at that index (may be zero), and the number of
invalid entries following those valid entries.  The valid entries, 16
bytes each, follow the header.  The invalid entries are not explicitly
represented.
Signed-off-by: NPaul Mackerras <paulus@samba.org>
[agraf: fix documentation]
Signed-off-by: NAlexander Graf <agraf@suse.de>
      a2932923
    • A
      KVM: PPC: Support eventfd · 0e673fb6
      由 Alexander Graf 提交于 
      In order to support the generic eventfd infrastructure on PPC, we need
to call into the generic KVM in-kernel device mmio code.
Signed-off-by: NAlexander Graf <agraf@suse.de>
      0e673fb6
  7. 28 11月, 2012 1 次提交
  9. 06 10月, 2012 15 次提交
  11. 06 9月, 2012 1 次提交
  13. 06 8月, 2012 1 次提交
  15. 30 5月, 2012 1 次提交
    • P
      KVM: PPC: Book3S HV: Make the guest hash table size configurable · 32fad281
      由 Paul Mackerras 提交于 
      This adds a new ioctl to enable userspace to control the size of the guest
hashed page table (HPT) and to clear it out when resetting the guest.
The KVM_PPC_ALLOCATE_HTAB ioctl is a VM ioctl and takes as its parameter
a pointer to a u32 containing the desired order of the HPT (log base 2
of the size in bytes), which is updated on successful return to the
actual order of the HPT which was allocated.

There must be no vcpus running at the time of this ioctl.  To enforce
this, we now keep a count of the number of vcpus running in
kvm->arch.vcpus_running.

If the ioctl is called when a HPT has already been allocated, we don't
reallocate the HPT but just clear it out.  We first clear the
kvm->arch.rma_setup_done flag, which has two effects: (a) since we hold
the kvm->lock mutex, it will prevent any vcpus from starting to run until
we're done, and (b) it means that the first vcpu to run after we're done
will re-establish the VRMA if necessary.

If userspace doesn't call this ioctl before running the first vcpu, the
kernel will allocate a default-sized HPT at that point.  We do it then
rather than when creating the VM, as the code did previously, so that
userspace has a chance to do the ioctl if it wants.

When allocating the HPT, we can allocate either from the kernel page
allocator, or from the preallocated pool.  If userspace is asking for
a different size from the preallocated HPTs, we first try to allocate
using the kernel page allocator.  Then we try to allocate from the
preallocated pool, and then if that fails, we try allocating decreasing
sizes from the kernel page allocator, down to the minimum size allowed
(256kB).  Note that the kernel page allocator limits allocations to
1 << CONFIG_FORCE_MAX_ZONEORDER pages, which by default corresponds to
16MB (on 64-bit powerpc, at least).
Signed-off-by: NPaul Mackerras <paulus@samba.org>
[agraf: fix module compilation]
Signed-off-by: NAlexander Graf <agraf@suse.de>
      32fad281
  17. 06 5月, 2012 2 次提交
  19. 08 4月, 2012 5 次提交
  21. 08 3月, 2012 1 次提交
  23. 05 3月, 2012 8 次提交