Jason J. Herne [Fri, 26 Jun 2015 18:03:16 +0000 (14:03 -0400)]
s390x: Dump storage keys qmp command
Provide a dump-skeys qmp command to allow the end user to dump storage
keys. This is useful for debugging problems with guest storage key support
within Qemu and for guest operating system developers.
Jason J. Herne [Fri, 26 Jun 2015 18:01:00 +0000 (14:01 -0400)]
s390x: Enable new s390-storage-keys device
s390 guest initialization is modified to make use of new s390-storage-keys
device. Old code that globally allocated storage key array is removed.
The new device enables storage key access for kvm guests.
Cache storage key QOM objects in frequently used helper functions to avoid a
performance hit every time we use one of these functions.
Jason J. Herne [Fri, 26 Jun 2015 15:54:51 +0000 (11:54 -0400)]
s390x: Create QOM device for s390 storage keys
A new QOM style device is provided to back guest storage keys. A special
version for KVM is created, which handles the storage key access via
KVM_S390_GET_SKEYS and KVM_S390_SET_SKEYS ioctl.
Peter Maydell [Tue, 1 Sep 2015 18:42:43 +0000 (19:42 +0100)]
Merge remote-tracking branch 'remotes/mdroth/tags/qga-pull-2015-09-01-v2-tag' into staging
qemu-ga patch queue
* add config file dump/load support for qemu-ga
* various w32 build fixes, particularly WRT to msi package creation
* fixes for msi installer
* w32 support for guest-set-user-password
v2:
* replaced g_list_free_full with g_list_foreach to maintain glib 2.22
compatibility
* remotes/mdroth/tags/qga-pull-2015-09-01-v2-tag: (26 commits)
Makefile: qemu-ga: fix msi target error message
build: qemu-ga: fix VSS dependencies
configure: qemu-ga: explicitly enable qemu-ga MSI support when probed
configure: qemu-ga: move MSI installer probe after qga probe
qemu-ga: implement win32 guest-set-user-password
qga: start a man page
qga: add --dump-conf option
qga: add an optional qemu-ga.conf system configuration
qga: free a bit more
qga: move agent run in a separate function
qga: fill default options in main()
qga: move option parsing to separate function
qga: copy argument strings
qga: rename 'path' to 'channel_path'
qga: make split_list() return allocated strings
qga: move string split in separate function
qga: use exit() when parsing options
qga: misc spelling
configure: qemu-ga: report MSI install support in summary
qemu-ga: Fixed paths issue with MSI build
...
Michael Roth [Wed, 26 Aug 2015 22:05:01 +0000 (17:05 -0500)]
Makefile: qemu-ga: fix msi target error message
'msi' target reports error if we attempt to use it when QEMU hasn't
been ./configure'd to enable it. The parenthesis cause an interpreter
error if we don't enclose the error in quotes.
Michael Roth [Wed, 26 Aug 2015 21:19:41 +0000 (16:19 -0500)]
build: qemu-ga: fix VSS dependencies
Currently VSS dll/tlb files for use in w32 builds are only built as a
result of having been added to the general 'tools' target alongside
qemu-ga. This is fine for default make target, but if we build
qemu-ga directly via `make qemu-ga.exe`, the VSS files are not
created.
Fix this by moving the VSS dependencies to qemu-ga.exe directly.
With this move we can move the VSS files back out of 'tools',
and drop the extra handling from MSI target in Makefile.
Now we can build qemu-ga MSI package with:
./configure ...
make qemu-ga.exe
make msi
Michael Roth [Wed, 26 Aug 2015 16:14:31 +0000 (11:14 -0500)]
configure: qemu-ga: explicitly enable qemu-ga MSI support when probed
Currently, if we don't explicitly disable support for MSI installer
via --disable-guest-agent-msi, the configure variable that tracks
the flag, 'guest_agent_msi', never gets set unless one of the probes
fails. Subsequent code then treats this unset value the same as if it
were a "yes" value (via != "no" style checks).
Instead, set the default "yes" value explicitly after the probes, then
make subsequent code expect the values to be set.
This makes it easier to report on whether or not MSI support was
enabled via probe by looking at the ./configure summary.
Michael Roth [Wed, 26 Aug 2015 15:49:13 +0000 (10:49 -0500)]
configure: qemu-ga: move MSI installer probe after qga probe
MSI probe assumes that qemu-ga support has been probed already, but in
cases where --enable-guest-agent/--disable-guest-agent have not been
passed to configure, qemu-ga support may end up getting enabled later,
as is the case with w32 builds. This leads to MSI probe prematurely
reporting error due to lack of qemu-ga support.
Fix this by moving MSI installer probe after the final qga probes.
This function is notoriously known to be problematic for users with EFS
encrypted files. But the alternative, NetUserChangePassword() requires
the old password. Nevertheless, The EFS file should be recovered by
changing back to the old password.
Following patch will return allocated strings, so we must correctly
initialize alloc & free them. The nice side effect is that we no longer
have to check for "fixed_state_dir" to call ga_install_service() with a
NULL state dir. The default values are set after parsing the command
line options.
Michael Roth [Tue, 25 Aug 2015 20:46:18 +0000 (15:46 -0500)]
configure: qemu-ga: report MSI install support in summary
Currently we need to examine config-host.mak to determine whether
options/probes for MSI package generation had desired result. Report
this more prominently in ./configure summary as we do with other
guest agent configure options.
Leonid Bloch [Mon, 3 Aug 2015 17:54:24 +0000 (20:54 +0300)]
qemu-ga: Prevent QEMU-GA VSS provider from being unregistered on MSI reinstall
Previously, running the .msi would unregister the QEMU GA VSS service if QEMU GA was already installed on the machine, and then register it only if QEMU GA was NOT previously installed. This behavior caused the service to be registered only after the INITIAL installation, and any subsequent run of the .msi (to redo, repair, or upgrade the installation) ended in the service being unregistered.
Now, the VSS service is still unregistered if QEMU GA is already installed (so that a fix or an update could be performed) but then it is registered again (if the GA is not being uninstalled) thus finishing the repair/upgrade correctly. Additionally, downgrading is now prevented. If a user would like to downgrade a version, he/she must uninstall the newer version first.
Peter Maydell [Fri, 28 Aug 2015 10:42:53 +0000 (11:42 +0100)]
qemu-doc.texi: Fix capitalization error in OS X build instructions
Fix a capitalization error in the OS X build instructions;
this was picked up in review of commit b352153f5f and intended to be
corrected before I applied it, but I accidentally didn't include it.
Peter Maydell [Thu, 27 Aug 2015 12:31:55 +0000 (13:31 +0100)]
Merge remote-tracking branch 'remotes/weil/tags/pull-tci-20150826' into staging
tci patch queue
# gpg: Signature made Wed 26 Aug 2015 19:51:07 BST using RSA key ID 677450AD
# gpg: Good signature from "Stefan Weil <[email protected]>"
# gpg: aka "Stefan Weil <[email protected]>"
# gpg: aka "Stefan Weil <[email protected]>"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 4923 6FEA 75C9 5D69 8EC2 B78A E08C 21D5 6774 50AD
* remotes/weil/tags/pull-tci-20150826:
exec-all: Translate TCI return addresses backwards too
exec-all: Translate TCI return addresses backwards too
This subtraction of return addresses applies directly to TCI as well as
host-TCG. This fixes Linux boots for at least Microblaze, CRIS, ARM and
SH4 when using TCI.
[sw: Removed indentation for preprocessor statement]
[sw: The patch also fixes Linux boot for x86_64]
Gerd Hoffmann [Mon, 17 Aug 2015 17:56:53 +0000 (19:56 +0200)]
vnc: fix memory corruption (CVE-2015-5225)
The _cmp_bytes variable added by commit "bea60dd ui/vnc: fix potential
memory corruption issues" can become negative. Result is (possibly
exploitable) memory corruption. Reason for that is it uses the stride
instead of bytes per scanline to apply limits.
For the server surface is is actually fine. vnc creates that itself,
there is never any padding and thus scanline length always equals stride.
For the guest surface scanline length and stride are typically identical
too, but it doesn't has to be that way. So add and use a new variable
(guest_ll) for the guest scanline length. Also rename min_stride to
line_bytes to make more clear what it actually is. Finally sprinkle
in an assert() to make sure we never use a negative _cmp_bytes again.
Peter Maydell [Tue, 25 Aug 2015 14:45:09 +0000 (15:45 +0100)]
target-arm: Restrict AArch64 TLB flushes to the MMU indexes they must touch
Now we have the ability to flush the TLB only for specific MMU indexes,
update the AArch64 TLB maintenance instruction implementations to only
flush the parts of the TLB they need to, rather than doing full flushes.
We take the opportunity to remove some duplicate functions (the per-asid
tlb ops work like the non-per-asid ones because we don't support
flushing a TLB only by ASID) and to bring the function names in line
with the architectural TLBI operation names.
Peter Maydell [Tue, 25 Aug 2015 14:45:09 +0000 (15:45 +0100)]
cputlb: Add functions for flushing TLB for a single MMU index
Guest CPU TLB maintenance operations may be sufficiently
specialized to only need to flush TLB entries corresponding
to a particular MMU index. Implement cputlb functions for
this, to avoid the inefficiency of flushing TLB entries
which we don't need to.
Peter Maydell [Tue, 25 Aug 2015 14:45:08 +0000 (15:45 +0100)]
target-arm: Enable the AArch32 ATS12NSO ops
Apply the correct conditions in the ats_access() function for
the ATS12NSO* address translation operations:
* succeed at EL2 or EL3
* normal UNDEF trap from NS EL1
* trap to EL3 from S EL1 (only possible if EL3 is AArch64)
(This change means they're now available in our EL3-supporting
CPUs when they would previously always UNDEF.)
Some coprocessor register access functions need to be able
to report "trap to EL3 with an 'uncategorized' syndrome";
add the necessary CPAccessResult enum and handling for it.
I don't currently know of any registers that need to trap
to EL2 with the 'uncategorized' syndrome, but adding the
_EL2 enum as well is trivial and fills in what would
otherwise be an odd gap in the handling.
Peter Maydell [Tue, 25 Aug 2015 14:45:08 +0000 (15:45 +0100)]
target-arm: Wire up AArch64 EL2 and EL3 address translation ops
Wire up the AArch64 EL2 and EL3 address translation operations
(AT S12E1*, AT S12E0*, AT S1E2*, AT S1E3*), and correct some
errors in the ats_write64() function in previously unused code
that would have done the wrong kind of lookup for accesses from
EL3 when SCR.NS==0.
Peter Maydell [Tue, 25 Aug 2015 14:45:08 +0000 (15:45 +0100)]
target-arm: there is no TTBR1 for 32-bit EL2 stage 1 translations
For EL2 stage 1 translations, there is no TTBR1. We were already
handling this for 64-bit EL2; add the code to take the 'no TTBR1'
code path for 64-bit EL2 as well.
Peter Maydell [Tue, 25 Aug 2015 14:45:07 +0000 (15:45 +0100)]
target-arm: Implement missing AFSR registers
The AFSR registers are implementation dependent auxiliary fault
status registers. We already implemented a RAZ/WI AFSR0_EL1 and
AFSR_EL1; add the missing AFSR{0,1}_EL{2,3} for consistency.
Peter Maydell [Tue, 25 Aug 2015 14:45:07 +0000 (15:45 +0100)]
target-arm: Implement missing AMAIR registers
The AMAIR registers are for providing auxiliary implementation
defined memory attributes. We already implemented a RAZ/WI
AMAIR_EL1; add the EL2 and EL3 versions for consistency.
Peter Maydell [Tue, 25 Aug 2015 14:45:07 +0000 (15:45 +0100)]
target-arm: Add missing MAIR_EL3 and TPIDR_EL3 registers
Add the AArch64 registers MAIR_EL3 and TPIDR_EL3, which are the only
two which we had implemented the 32-bit Secure equivalents of but
not the 64-bit Secure versions.
Peter Maydell [Tue, 25 Aug 2015 12:34:57 +0000 (13:34 +0100)]
Merge remote-tracking branch 'remotes/rth/tags/pull-tcg-20150824' into staging
queued tcg patches
# gpg: Signature made Mon 24 Aug 2015 19:37:15 BST using RSA key ID 4DD0279B
# gpg: Good signature from "Richard Henderson <[email protected]>"
# gpg: aka "Richard Henderson <[email protected]>"
# gpg: aka "Richard Henderson <[email protected]>"
* remotes/rth/tags/pull-tcg-20150824:
linux-user: remove useless macros GUEST_BASE and RESERVED_VA
linux-user: remove --enable-guest-base/--disable-guest-base
tcg/aarch64: Use softmmu fast path for unaligned accesses
tcg/s390: Use softmmu fast path for unaligned accesses
tcg/ppc: Improve unaligned load/store handling on 64-bit backend
tcg/i386: use softmmu fast path for unaligned accesses
tcg: Remove tcg_gen_trunc_i64_i32
tcg: Split trunc_shr_i32 opcode into extr[lh]_i64_i32
tcg: update README about size changing ops
tcg/optimize: add optimizations for ext_i32_i64 and extu_i32_i64 ops
tcg: implement real ext_i32_i64 and extu_i32_i64 ops
tcg: don't abuse TCG type in tcg_gen_trunc_shr_i64_i32
tcg: rename trunc_shr_i32 into trunc_shr_i64_i32
tcg/optimize: allow constant to have copies
tcg/optimize: track const/copy status separately
tcg/optimize: add temp_is_const and temp_is_copy functions
tcg/optimize: optimize temps tracking
tcg/optimize: fix constant signedness
Laurent Vivier [Mon, 24 Aug 2015 12:53:54 +0000 (14:53 +0200)]
linux-user: remove useless macros GUEST_BASE and RESERVED_VA
As we have removed CONFIG_USE_GUEST_BASE, we always use a guest base
and the macros GUEST_BASE and RESERVED_VA become useless: replace
them by their values.
All tcg host architectures now support the guest base and as
there is no real performance lost, it can be always enabled.
Anyway, guest base use can be disabled lively by setting guest
base to 0.
CONFIG_USE_GUEST_BASE is defined as (USE_GUEST_BASE && USER_ONLY),
it should have to be replaced by CONFIG_USER_ONLY in non CONFIG_USER_ONLY
parts, but as some other parts are using !CONFIG_SOFTMMU I have chosen to
use !CONFIG_SOFTMMU instead.
tcg/ppc: Improve unaligned load/store handling on 64-bit backend
Currently, we get to the slow path for any unaligned access in the
backend, because we effectively preserve the bottom address bits
below the alignment requirement when comparing with the TLB entry,
so any non-0 bit there will cause the compare to fail.
For the same number of instructions, we can instead add the access
size - 1 to the address and stick to clearing all the bottom bits.
That means that normal unaligned accesses will not fallback (the HW
will handle them fine). Only when crossing a page boundary well we
end up having a mismatch because we'll end up pointing to the next
page which cannot possibly be in that same TLB entry.
tcg/i386: use softmmu fast path for unaligned accesses
Softmmu unaligned load/stores currently goes through through the slow
path for two reasons:
- to support unaligned access on host with strict alignement
- to correctly handle accesses crossing pages
x86 is only concerned by the second reason. Unaligned accesses are
avoided by compilers, but are not uncommon. We therefore would like
to see them going through the fast path, if they don't cross pages.
For that we can use the fact that two adjacent TLB entries can't contain
the same page. Therefore accessing the TLB entry corresponding to the
first byte, but comparing its content to page address of the last byte
ensures that we don't cross pages. We can do this check without adding
more instructions in the TLB code (but increasing its length by one
byte) by using the LEA instruction to combine the existing move with the
size addition.
On an x86-64 host, this gives a 3% boot time improvement for a powerpc
guest and 4% for an x86-64 guest.
tcg/optimize: add optimizations for ext_i32_i64 and extu_i32_i64 ops
They behave the same as ext32s_i64 and ext32u_i64 from the constant
folding and zero propagation point of view, except that they can't
be replaced by a mov, so we don't compute the affected value.
tcg: implement real ext_i32_i64 and extu_i32_i64 ops
Implement real ext_i32_i64 and extu_i32_i64 ops. They ensure that a
32-bit value is always converted to a 64-bit value and not propagated
through the register allocator or the optimizer.
tcg: don't abuse TCG type in tcg_gen_trunc_shr_i64_i32
The tcg_gen_trunc_shr_i64_i32 function takes a 64-bit argument and
returns a 32-bit value. Directly call tcg_gen_op3 with the correct
types instead of calling tcg_gen_op3i_i32 and abusing the TCG types.
Now that copies and constants are tracked separately, we can allow
constant to have copies, deferring the choice to use a register or a
constant to the register allocation pass. This prevent this kind of
regular constant reloading:
Instead of using an enum which could be either a copy or a const, track
them separately. This will be used in the next patch.
Constants are tracked through a bool. Copies are tracked by initializing
temp's next_copy and prev_copy to itself, allowing to simplify the code
a bit.
The tcg_temp_info structure uses 24 bytes per temp. Now that we emulate
vector registers on most guests, it's not uncommon to have more than 100
used temps. This means we have initialize more than 2kB at least twice
per TB, often more when there is a few goto_tb.
Instead used a TCGTempSet bit array to track which temps are in used in
the current basic block. This means there are only around 16 bytes to
initialize.
This improves the boot time of a MIPS guest on an x86-64 host by around
7% and moves out tcg_optimize from the the top of the profiler list.
By convention, on a 64-bit host TCG internally stores 32-bit constants
as sign-extended. This is not the case in the optimizer when a 32-bit
constant is folded.
This doesn't seem to have more consequences than suboptimal code
generation. For instance the x86 backend assumes sign-extended constants,
and in some rare cases uses a 32-bit unsigned immediate 0xffffffff
instead of a 8-bit signed immediate 0xff for the constant -1. This is
with a ppc guest:
Peter Maydell [Fri, 14 Aug 2015 15:10:52 +0000 (16:10 +0100)]
configure: Don't permit SDL or GTK on OSX
The cocoa GUI frontend assumes it is the only GUI (it redefines
main() so it always gets control before the rest of QEMU), so
it does not play well with other UIs like SDL or GTK. (Mostly
people building QEMU on OSX don't have the necessary dependencies
available for configure to build those other front ends, so
mostly this problem goes unnoticed.)
Make configure automatically disable the SDL and GTK front ends
if the cocoa front end is enabled. (We were sort of attempting
to do this for SDL before, but not in a way that worked very well.)
Peter Maydell [Wed, 19 Aug 2015 15:20:20 +0000 (16:20 +0100)]
apic_internal.h: Include cpu.h directly
apic_internal.h relies on cpu.h having been included (for the
X86CPU type); include it directly rather than relying on it
being pulled in via one of the other includes like timer.h.
Peter Maydell [Wed, 19 Aug 2015 15:20:20 +0000 (16:20 +0100)]
qemu-common.h: Move muldiv64() to host-utils.h
Move the muldiv64() function from qemu-common.h to host-utils.h.
This puts it together with all the other arithmetic functions
where we provide a version with __int128_t and a fallback
without, and allows headers which need muldiv64() to avoid
including qemu-common.h.
We don't include host-utils from qemu-common.h, to avoid dragging
more things into qemu-common.h than it already has; in practice
everywhere that needs muldiv64() can get it via qemu/timer.h.
Peter Maydell [Wed, 19 Aug 2015 15:20:19 +0000 (16:20 +0100)]
osdep.h: Move some OS header includes and fixups from qemu-common.h
qemu-common.h has some system header includes and fixups for
things that might be missing. This is really an OS dependency
and belongs in osdep.h, so move it across.
Peter Maydell [Wed, 19 Aug 2015 15:20:19 +0000 (16:20 +0100)]
compiler.h: Use glue() in QEMU_BUILD_BUG_ON define
Rather than rolling custom concatenate-strings macros for the
QEMU_BUILD_BUG_ON macro to use, use the glue() macro we already
have (since it's now available to us in this header).
Peter Maydell [Wed, 19 Aug 2015 15:20:19 +0000 (16:20 +0100)]
osdep.h: Remove qemu_printf
qemu_printf is an ancient remnant which has been a simple #define to
printf for over a decade, and is used in only a few places. Expand
it out in those places and remove the #define.
Peter Maydell [Wed, 19 Aug 2015 15:20:19 +0000 (16:20 +0100)]
qapi/qmp-event.c: Don't manually include os-win32.h/os-posix.h
qmp-event.c already includes qemu-common.h, so manually including
os-win32.h/os-posix.h is unnecessary (and potentially fragile,
since it's duplicating the #ifdef logic that chooses which of the
two we need). Remove the unnecessary include logic.
Peter Maydell [Tue, 18 Aug 2015 23:25:52 +0000 (00:25 +0100)]
Merge remote-tracking branch 'remotes/rth/tags/pull-axp-201508018' into staging
Alpha shadow register optimization
# gpg: Signature made Tue 18 Aug 2015 19:09:41 BST using RSA key ID 4DD0279B
# gpg: Good signature from "Richard Henderson <[email protected]>"
# gpg: aka "Richard Henderson <[email protected]>"
# gpg: aka "Richard Henderson <[email protected]>"
* remotes/rth/tags/pull-axp-201508018:
target-alpha: Inline hw_ret
target-alpha: Inline call_pal
target-alpha: Use separate TCGv temporaries for the shadow registers
target-alpha: Use separate TCGv temporaries for the shadow registers
This avoids having to manually swap them around when swapping to and
from PALmode. We simply encode the shadow registers into the translation.
The VMStateDescription version changes, because the meaning of "shadow"
changes in the save file when in PALmode. It would be possible to fix
this, but I don't think it's worth the effort.
Peter Maydell [Tue, 18 Aug 2015 16:06:41 +0000 (17:06 +0100)]
Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging
* SCSI fixes from Stefan and Fam
* vhost-scsi fix from Igor and Lu Lina
* a build system fix from Daniel
* two more multi-arch-related patches from Peter C.
* TCG patches from myself and Sergey Fedorov
* RCU improvement from Wen Congyang
* a few more simple cleanups
# gpg: Signature made Fri 14 Aug 2015 22:41:52 BST using RSA key ID 78C7AE83
# gpg: Good signature from "Paolo Bonzini <[email protected]>"
# gpg: aka "Paolo Bonzini <[email protected]>"
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg: It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4 E2F7 7E15 100C CD36 69B1
# Subkey fingerprint: F133 3857 4B66 2389 866C 7682 BFFB D25F 78C7 AE83
* remotes/bonzini/tags/for-upstream:
disas: Defeature print_target_address
hw: fix mask for ColdFire UART command register
scsi-generic: identify AIO callbacks more clearly
scsi-disk: identify AIO callbacks more clearly
scsi: create restart bottom half in the right AioContext
configure: only add CONFIG_RDMA to config-host.h once
qemu-nbd: remove unnecessary qemu_notify_event()
vhost-scsi: Clarify vhost_virtqueue_mask argument
exec: use macro ROUND_UP for alignment
rcu: Allow calling rcu_(un)register_thread() during synchronize_rcu()
exec: drop cpu_can_do_io, just read cpu->can_do_io
cpu_defs: Simplify CPUTLB padding logic
cpu-exec: Do not invalidate original TB in cpu_exec_nocache()
vhost/scsi: call vhost_dev_cleanup() at unrealize() time
virtio-scsi-test: Add test case for tail unaligned WRITE SAME
scsi-disk: Fix assertion failure on WRITE SAME
tests: virtio-scsi: clear unit attention after reset
scsi-disk: fix cmd.mode field typo
virtio-scsi: use virtqueue_map_sg() when loading requests
It does not work in multi-arch as it requires the CPU specific
TARGET_VIRT_ADDR_SPACE_BITS global define. Just use the generic
version that does no masking. Targets should be responsible for
passing in a sane virtual address.
Paolo Bonzini [Wed, 24 Jun 2015 11:55:51 +0000 (13:55 +0200)]
hw: fix mask for ColdFire UART command register
The "miscellaneous commands" part of the register is 3 bits wide.
Spotted by Coverity and confirmed in the datasheet, downloadable from
http://cache.freescale.com/files/32bit/doc/ref_manual/MCF5307BUM.pdf
(figure 14-6).
Paolo Bonzini [Mon, 27 Jul 2015 11:52:55 +0000 (13:52 +0200)]
qemu-nbd: remove unnecessary qemu_notify_event()
This was needed when qemu-nbd was using qemu_set_fd_handler2. It is
not needed anymore now that nbd_update_server_fd_handler is called
whenever nbd_can_accept() can change from false to true.
nbd_update_server_fd_handler will call qemu_set_fd_handler(),
which will call qemu_notify_event().
Lu Lina [Mon, 27 Jul 2015 06:25:59 +0000 (14:25 +0800)]
vhost-scsi: Clarify vhost_virtqueue_mask argument
vhost_virtqueue_mask takes an "absolute" virtqueue index, while the
code looks like it's passing an index that is relative to
s->dev.vq_index. In reality, s->dev.vq_index is always zero, so
this patch does not make any difference, but the code is clearer.
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