Commit Graph

24128 Commits

Author SHA1 Message Date
Paolo Bonzini
f141ccfa15 build: make libtool verbose when making with V=1
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-01-12 17:19:08 +01:00
Paolo Bonzini
5708fc6655 stubs: fully replace qemu-tool.c and qemu-user.c
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-01-12 17:19:08 +01:00
Paolo Bonzini
4d4545743f qemu-option: move standard option definitions out of qemu-config.c
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-01-12 17:17:53 +01:00
Blue Swirl
63fb259083 Merge branch 'target-arm.next' of git://git.linaro.org/people/pmaydell/qemu-arm
* 'target-arm.next' of git://git.linaro.org/people/pmaydell/qemu-arm:
  target-arm: Fix SWI (SVC) instruction in M profile.
  target-arm: use type_register() instead of type_register_static()
2013-01-12 12:47:07 +00:00
Blue Swirl
02e079c79c Merge branch 'ppc-for-upstream' of git://repo.or.cz/qemu/agraf
* 'ppc-for-upstream' of git://repo.or.cz/qemu/agraf: (31 commits)
  PPC: linux-user: Calculate context pointer explicitly
  target-ppc: Error out for -cpu host on unknown PVR
  target-ppc: Slim conversion of model definitions to QOM subclasses
  PPC: Bring EPR support closer to reality
  PPC: KVM: set has-idle in guest device tree
  kvm: Update kernel headers
  openpic: fix CTPR and de-assertion of interrupts
  openpic: move IACK to its own function
  openpic: IRQ_check: search the queue a word at a time
  openpic: fix sense and priority bits
  openpic: add some bounds checking for IRQ numbers
  openpic: use standard bitmap operations
  Revert "openpic: Accelerate pending irq search"
  openpic: always call IRQ_check from IRQ_get_next
  openpic/fsl: critical interrupts ignore mask before v4.1
  openpic: make ctpr signed
  openpic: rework critical interrupt support
  openpic: make register names correspond better with hw docs
  ppc/booke: fix crit/mcheck/debug exceptions
  openpic: lower interrupt when reading the MSI register
  ...
2013-01-12 12:47:02 +00:00
Blue Swirl
837d1f9782 Merge branch 's390-reorg' of git://repo.or.cz/qemu/rth
* 's390-reorg' of git://repo.or.cz/qemu/rth: (149 commits)
  target-s390: Claim maintainership
  target-s390: Use noreturn for exception and load_psw
  target-s390: Use TCG_CALL_NO_WG for misc helpers
  target-s390: Use TCG_CALL_NO_WG for integer helpers
  target-s390: Use TCG_CALL_NO_WG for floating-point helpers
  target-s390: Use TCG_CALL_NO_WG for memory helpers
  target-s390: Perform COMPARE AND SWAP inline
  target-s390: Optimize get_address
  target-s390: Optimize ADDC/SUBB
  target-s390: Optimize ADDU/SUBU CC testing
  target-s390: Tidy comparisons
  target-s390: Optmize emitting discards
  target-s390: Optimize XC
  target-s390: Fix cpu_clone_regs
  target-s390: Implement LOAD/SET FP AND SIGNAL
  target-s390: Implement SET ROUNDING MODE
  target-s390: Use uint64_to_float128
  target-s390: Implement LCDFR
  target-s390: Check insn operand specifications
  target-s390: Implement CPSDR
  ...
2013-01-12 12:46:57 +00:00
Julien Grall
a6fc23e5dc hw/pc.c: add ULL suffix in ioport80_read and ioportF0_read return value
The commit c02e1eac88 broke the compilation
for i386. ULL need to be specify for uint64_t value.

Signed-off-by: Julien Grall <julien.grall@citrix.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-01-12 12:46:36 +00:00
Paolo Bonzini
163fa4b09d tcg-i386: use LEA for 3-operand 64-bit addition
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-01-12 12:45:56 +00:00
Gerd Hoffmann
092bb30688 pixman: fix warning
Cc: afaerber@suse.de
Cc: agraf@suse.de
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-01-12 12:42:55 +00:00
Gerd Hoffmann
cc6e3ca93c gcc: rename CONFIG_PRAGMA_DISABLE_UNUSED_BUT_SET to CONFIG_PRAGMA_DIAGNOSTIC_AVAILABLE
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-01-12 12:42:53 +00:00
Blue Swirl
3dd46c7852 optionrom: build with discrete CPP and AS steps
Build option ROM .S files with separate preprocessor and
assembler steps because the C compiler could be unsuitable.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-01-12 12:40:36 +00:00
Blue Swirl
b6d9439c0d slirp: remove unused field tt
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-01-12 12:26:16 +00:00
Richard Henderson
338d80dd35 user: Consider symbolic links as possible directories
Commit 2296f194df reduced the number
of syscalls performed during user emulation startup, but failed to
consider the use of symbolic links in creating directory structures.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-01-12 12:25:22 +00:00
Richard Henderson
d2565875ec alpha-linux-user: Fix sigaction
Unconditional bswap replaced by __get_user/__put_user.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-01-12 12:25:12 +00:00
Richard Henderson
658f2dc970 linux-user: Rewrite __get_user/__put_user with __builtin_choose_expr
The previous formuation with multiple assignments to __typeof(*hptr) falls
down when hptr is qualified const.  E.g. with const struct S *p, p->f is
also qualified const.

With this formulation, there's no assignment to any local variable.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-01-12 12:24:47 +00:00
Richard Henderson
c732a52d3e bswap: Rewrite cpu_to_<endian><type>u with {ld,st}<type>_<endian>_p
We've now optimized the ld/st versions; reuse that for the "legacy"
versions.  Always use inlines so that we get the type checking that
we expect.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-01-12 12:24:33 +00:00
Richard Henderson
612d590ebc bswap: Rewrite all ld<type>_<endian>_p functions
Use the new host endian unaligned access functions instead of
open coding byte-by-byte references.  Remove assembly special
cases for i386 and ppc -- we've now exposed the operation to
the compiler sufficiently for these to be optimized automatically.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-01-12 12:24:24 +00:00
Richard Henderson
7db2145a68 bswap: Add host endian unaligned access functions
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-01-12 12:24:07 +00:00
Richard Henderson
cdfe2851c6 bswap: Tidy base definitions of bswapN
Move the bswap_N -> bswapN wrappers inside CONFIG_BYTESWAP_H.

Change the ultimate fallback defintions from macros to inline functions.
The proper types recieved by the function arguments means we can remove
unnecessary casts, making the code more readable.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-01-12 12:23:26 +00:00
Richard Henderson
fedb88bd32 fdt: Use bswapN instead of bswap_N
Fixes the libfdt enabled build for hosts that have <machine/bswap.h>.

The code at the beginning of qemu/bswap.h is attempting to standardize
on bswapN.  In the case of CONFIG_MACHINE_BSWAP_H, this is all we get.
In the case of CONFIG_BYTESWAP_H, we get bswap_N from the system header
and then wrap these with inline functions to get bswapN.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-01-12 12:22:58 +00:00
Alex_Rozenman@mentor.com
314e2296dc target-arm: Fix SWI (SVC) instruction in M profile.
When do_interrupt_v7m is called with EXCP_SWI, the PC already
points to the next instruction. Don't modify it here.

Signed-off-by: Alex Rozenman <Alex_Rozenman@mentor.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2013-01-11 15:21:22 +00:00
Eduardo Habkost
918fd0839e target-arm: use type_register() instead of type_register_static()
The type_register_static() interface is documented as:

  type_register_static:
  @info: The #TypeInfo of the new type.

  @info and all of the strings it points to should exist for the life
  time that the type is registered.

But cpu_register() uses a stack variable for the 'info' argument, so it
has to use type_register() instead of type_register_static().

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2013-01-11 15:21:22 +00:00
Anthony Liguori
fedf2de310 Merge remote-tracking branch 'stefanha/trivial-patches' into staging
* stefanha/trivial-patches:
  hw/pc.c: Fix converting of ioport_register* to MemoryRegion
  Replace remaining gmtime, localtime by gmtime_r, localtime_r
  savevm: Remove MinGW specific code which is no longer needed
  qga/channel-posix.c: Explicitly include string.h
  configure: Fix comment (copy+paste bug)
  readline: avoid memcpy() of overlapping regions

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-01-11 08:43:18 -06:00
Anthony Liguori
e2848a78b0 Merge remote-tracking branch 'kraxel/q35.1' into staging
* kraxel/q35.1:
  Makefile: install the "acpi-dsdt.aml" and "q35-acpi-dsdt.aml" blobs too
  pc: rename machine types
  q35: document chipset devices
  q35: add ich9 intel hda controller

Conflicts:
	hw/intel-hda.c

aliguori: resolve conflict with static const change from Andreas.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-01-11 08:43:08 -06:00
Anthony Liguori
80ec243286 Merge remote-tracking branch 'afaerber-or/prep-up' into staging
* afaerber-or/prep-up:
  prep: Use pc87312 device instead of collection of random ISA devices
  prep: Add pc87312 Super I/O emulation
  prep: Include devices for ppc64 as well

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-01-11 08:23:16 -06:00
Julien Grall
c02e1eac88 hw/pc.c: Fix converting of ioport_register* to MemoryRegion
The commit 258711 introduced MemoryRegion to replace ioport_region*
for ioport 80h and F0h.
A MemoryRegion needs to have both read and write callback otherwise a segfault
will occur when an access is made.

The previous behaviour of this both ioport is to return 0xffffffffffffffff.
So keep this behaviour.

Reported-by: Adam Lackorzynski <adam@os.inf.tu-dresden.de>
Signed-off-by: Julien Grall <julien.grall@citrix.com>
Tested-by: Adam Lackorzynski <adam@os.inf.tu-dresden.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-01-11 09:49:44 +01:00
Stefan Weil
eb7ff6fb0b Replace remaining gmtime, localtime by gmtime_r, localtime_r
This allows removing of MinGW specific code and improves
reentrancy for POSIX hosts.

[Removed unused ret variable in qemu_get_timedate() to fix warning:
vl.c: In function ‘qemu_get_timedate’:
vl.c:451:16: error: variable ‘ret’ set but not used [-Werror=unused-but-set-variable]
-- Stefan Hajnoczi]

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-01-11 09:44:37 +01:00
Stefan Weil
68b891ec39 savevm: Remove MinGW specific code which is no longer needed
QEMU provides a portable function qemu_gettimeofday instead of
gettimeofday and also an implementation of localtime_r for MinGW.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-01-11 09:35:11 +01:00
Peter Maydell
1d57db193f qga/channel-posix.c: Explicitly include string.h
Explicitly include string.h to avoid warnings under MacOS X/clang
about implicit declarations of strerror() and strlen().

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-01-11 09:33:41 +01:00
Stefan Weil
75f1359645 configure: Fix comment (copy+paste bug)
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-01-11 09:32:54 +01:00
Laszlo Ersek
7e973bb2e1 Makefile: install the "acpi-dsdt.aml" and "q35-acpi-dsdt.aml" blobs too
The WARNING message from commit f7e4dd6c made me notice.

Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-01-11 08:30:24 +01:00
Gerd Hoffmann
94dec5948a pc: rename machine types
Starting with release 1.4 we have a fully functional q35 machine type,
i.e. "qemu -M q35" JustWorks[tm].  Update machine type names to reflect
that:

  * pc-1.4 becomes pc-i440fx-1.4
  * q35-next becomes pc-q35-1.4

The pc-1.3 (+older) names are maintained for compatibility reasons.
For the same reason the "pc" and "q35" aliases are kept.  pc-piix-1.4
continues to be the default machine type, again for compatibility
reasons.

Also updated the description (shown by "qemu -M ?") with host bridge
name, south bridge name and chipset release year.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-01-11 08:30:24 +01:00
Gerd Hoffmann
7d9f7b51cc q35: document chipset devices
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-01-11 08:30:24 +01:00
Gerd Hoffmann
8b07eaa110 q35: add ich9 intel hda controller
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-01-11 08:30:24 +01:00
Paolo Bonzini
47a150a4bb virtio-scsi: abort in-flight I/O when the device is reset
When the device is reset, the SCSI bus should also be reset so
that in-flight I/O is cancelled.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-01-10 15:22:42 -06:00
Paolo Bonzini
d0508c3664 qdev: add qbus_reset_all
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-01-10 15:22:42 -06:00
Andreas Färber
8c43a6f05d Make all static TypeInfos const
Since 39bffca203 (qdev: register all
types natively through QEMU Object Model), TypeInfo as used in
the common, non-iterative pattern is no longer amended with information
and should therefore be const.

Fix the documented QOM examples:

 sed -i 's/static TypeInfo/static const TypeInfo/g' include/qom/object.h

Since frequently the wrong examples are being copied by contributors of
new devices, fix all types in the tree:

 sed -i 's/^static TypeInfo/static const TypeInfo/g' */*.c
 sed -i 's/^static TypeInfo/static const TypeInfo/g' */*/*.c

This also avoids to piggy-back these changes onto real functional
changes or other refactorings.

Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-01-10 15:11:53 -06:00
Andreas Färber
63e3555e80 Merge branch 'master' of git://git.qemu.org/qemu into prep-up
Conflicts:
	hw/Makefile.objs
	hw/ppc_prep.c

Signed-off-by: Andreas Färber <andreas.faerber@web.de>
2013-01-10 21:52:28 +01:00
Anthony Liguori
a6308bc222 Merge remote-tracking branch 'kraxel/build.1' into staging
* kraxel/build.1:
  m48t59-test: don't touch watchdog
  rtc-test: skip year-2038 overflow check in case time_t is 32bit only

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-01-10 13:26:31 -06:00
Anthony Liguori
8757c09f15 vfio-pci: Fixes for qemu 1.4 & stable
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Merge remote-tracking branch 'awilliam/tags/qemu-1.4-vfio-20130109.0' into staging

vfio-pci: Fixes for qemu 1.4 & stable

* awilliam/tags/qemu-1.4-vfio-20130109.0:
  vfio-pci: Loosen sanity checks to allow future features
  vfio-pci: Make host MSI-X enable track guest

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-01-10 13:26:12 -06:00
Markus Armbruster
517823449e monitor: assert monitor_puts()'s loop invariant
Chiefly to hush up Coverity.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2013-01-10 14:47:56 -02:00
Gerd Hoffmann
067f069127 m48t59-test: don't touch watchdog
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-01-10 15:23:39 +01:00
Gerd Hoffmann
4e45deedf5 rtc-test: skip year-2038 overflow check in case time_t is 32bit only
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-01-10 15:23:39 +01:00
Wen Congyang
6ad53bdf58 target-i386: fix bits 39:32 of the final physical address when using 4M page
((pde & 0x1fe000) << 19) is the bits 39:32 of the final physical address, and
we shouldn't use unit32_t to calculate it. Convert the type to hwaddr to fix
this problem.

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2013-01-09 15:12:20 -02:00
Fabien Chouteau
5e3bc735d9 Check return values from g_poll and select
The current implementation of os_host_main_loop_wait() on Windows,
returns 1 only when a g_poll() event occurs because the return value of
select() is overridden. This is wrong as we may skip a socket event, as
shown in this example:

1. select() returns 0
2. g_poll() returns 1  (socket event occurs)
3. os_host_main_loop_wait() returns 1
4. qemu_iohandler_poll() sees no socket event because select() has
   return before the event occurs
5. select() returns 1
6. g_poll() returns 0 (g_poll overrides select's return value)
7. os_host_main_loop_wait() returns 0
8. qemu_iohandler_poll() doesn't check for socket events because the
   return value of os_host_main_loop_wait() is zero.
9. goto 5

This patch use one variable for each of these return values, so we don't
miss a select() event anymore.

Also move the call to select() after g_poll(), this will improve latency
as we don't have to go through two os_host_main_loop_wait() calls to
detect a socket event.

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Fabien Chouteau <chouteau@adacore.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-01-09 11:03:05 -06:00
Anthony Liguori
7cd5da7eef Merge remote-tracking branch 'mdroth/qga-pull-1-8-2013' into staging
* mdroth/qga-pull-1-8-2013:
  qemu-ga: sample fsfreeze hooks
  qemu-ga: execute hook to quiesce the guest on fsfreeze-freeze/thaw
  qemu-ga: guest_suspend(): improve error reporting
  qemu-ga: bios_supports_mode(): improve error reporting
  qemu-ga: qmp_guest_network_get_interfaces(): get rid of snprintf() + error_set()
  qemu-ga: qmp_guest_fstrim(): get rid of sprintf() + error_set()
  qemu-ga: qmp_guest_fsfreeze_*(): get rid of sprintf() + error_set()
  qemu-ga: build_fs_mount_list(): take an Error argument
  qemu-ga: qmp_guest_shutdown(): improve error reporting
  qemu-ga: qmp_guest_file_*: improve error reporting
  qemu-ga: qmp_guest_file_close(): fix fclose() error check
  qemu-ga: guest_file_handle_find(): take an Error argument

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-01-09 09:55:51 -06:00
Alex Williamson
feb9a2ab4b pci-assign: Enable MSIX on device to match guest
When a guest enables MSIX on a device we evaluate the MSIX vector
table, typically find no unmasked vectors and don't switch the device
to MSIX mode.  This generally works fine and the device will be
switched once the guest enables and therefore unmasks a vector.
Unfortunately some drivers enable MSIX, then use interfaces to send
commands between VF & PF or PF & firmware that act based on the host
state of the device.  These therefore may break when MSIX is managed
lazily.  This change re-enables the previous test used to enable MSIX
(see qemu-kvm a6b402c9), which basically guesses whether a vector
will be used based on the data field of the vector table.

Cc: qemu-stable@nongnu.org
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2013-01-09 12:11:16 +02:00
Paolo Bonzini
5c03a2542f pci: use constants for devices under the 1B36 device ID, document them
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2013-01-09 12:10:28 +02:00
Tomoki Sekiyama
96610da210 qemu-ga: sample fsfreeze hooks
Adds sample hook scripts for --fsfreeze-hook option of qemu-ga.
  - fsfreeze-hook : execute scripts in fsfreeze-hook.d/
  - fsfreeze-hook.d/mysql-flush.sh.sample : quiesce MySQL before snapshot

Signed-off-by: Tomoki Sekiyama <tomoki.sekiyama.qu@hitachi.com>
Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
2013-01-08 16:38:12 -06:00
Tomoki Sekiyama
ec0f694c11 qemu-ga: execute hook to quiesce the guest on fsfreeze-freeze/thaw
To use the online disk snapshot for online-backup, application-level
consistency of the snapshot image is required. However, currently the
guest agent can provide only filesystem-level consistency, and the
snapshot may contain dirty data, for example, incomplete transactions.
This patch provides the opportunity to quiesce applications before
snapshot is taken.

If --fsfreeze-hook option is specified, the hook is executed with
"freeze" argument before the filesystem is frozen by fsfreeze-freeze
command. As for fsfreeze-thaw command, the hook is executed with "thaw"
argument after the filesystem is thawed.

This patch depends on patchset to improve error reporting by Luiz Capitulino:
  http://lists.gnu.org/archive/html/qemu-devel/2012-11/msg03016.html

Signed-off-by: Tomoki Sekiyama <tomoki.sekiyama.qu@hitachi.com>
Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>

*clarified usage in help output

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
2013-01-08 16:38:12 -06:00