| Age | Commit message (Collapse) | Author | Files | Lines |
|---|
|
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]
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com>
(cherry picked from commit a17d448274575efbfcc1c04ec2641a0afeb74e17)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
|
|
It has been reported that at least tgtd returns a block size of 0
for LUN 0. To avoid running into divide by zero later on and protect
against other problematic block sizes validate the block size right
at connection time.
Cc: qemu-stable@nongnu.org
Reported-by: Andrey Korolyov <andrey@xdel.ru>
Signed-off-by: Peter Lieven <pl@kamp.de>
Message-Id: <1439552016-8557-1-git-send-email-pl@kamp.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 6d1f252d8c1ba73bf6ed9af28731a9c9c3d473a2)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
|
|
A spurious trailing "\n" in the gdb syscall format string used
for SYS_WRITE0 meant that gdb would reject the remote syscall,
with the effect that the output from the guest was silently dropped.
Remove the newline so that gdb accepts the packet.
Cc: qemu-stable@nongnu.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
(cherry picked from commit 857b55adb77004d9ec9202078b7f1f3a1a076112)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
|
|
This fixes a regression introduced by commit dcfb3beb ("mirror: Do zero
write on target if sectors not allocated"), which was reported to cause
aborts with the message "Co-routine re-entered recursively".
The cause for this bug is the following code in mirror_iteration_done():
if (s->common.busy) {
qemu_coroutine_enter(s->common.co, NULL);
}
This has always been ugly because - unlike most places that reenter - it
doesn't have a specific yield that it pairs with, but is more
uncontrolled. What we really mean here is "reenter the coroutine if
it's in one of the four explicit yields in mirror.c".
This used to be equivalent with s->common.busy because neither
mirror_run() nor mirror_iteration() call any function that could yield.
However since commit dcfb3beb this doesn't hold true any more:
bdrv_get_block_status_above() can yield.
So what happens is that bdrv_get_block_status_above() wants to take a
lock that is already held, so it adds itself to the queue of waiting
coroutines and yields. Instead of being woken up by the unlock function,
however, it gets woken up by mirror_iteration_done(), which is obviously
wrong.
In most cases the code actually happens to cope fairly well with such
cases, but in this specific case, the unlock must already have scheduled
the coroutine for wakeup when mirror_iteration_done() reentered it. And
then the coroutine happened to process the scheduled restarts and tried
to reenter itself recursively.
This patch fixes the problem by pairing the reenter in
mirror_iteration_done() with specific yields instead of abusing
s->common.busy.
Cc: qemu-stable@nongnu.org
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Message-id: 1439455310-11263-1-git-send-email-kwolf@redhat.com
Signed-off-by: Jeff Cody <jcody@redhat.com>
(cherry picked from commit e424aff5f307227b1c2512bbb8ece891bb895cef)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
|
|
The last portion of an unaligned WRITE SAME command could fail the
assertion in bdrv_aligned_pwritev:
assert(!qiov || bytes == qiov->size);
Because we updated data->iov.iov_len right above this if block, but
data->qiov still has the old size.
Reinitialize the qiov to make them equal and keep block layer happy.
Cc: qemu-stable@nongnu.org
Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <1438159512-3871-2-git-send-email-famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit a56537a12757a8cdee24ad8c83e5af7a9833ea70)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
|
|
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
|
|
Ne2000 NIC uses ring buffer of NE2000_MEM_SIZE(49152)
bytes to process network packets. While receiving packets
via ne2000_receive() routine, a local 'index' variable
could exceed the ring buffer size, leading to an infinite
loop situation.
Reported-by: Qinghao Tang <luodalongde@gmail.com>
Signed-off-by: P J P <pjp@fedoraproject.org>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
(cherry picked from commit 737d2b3c41d59eb8f94ab7eb419b957938f24943)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
|
|
Ne2000 NIC uses ring buffer of NE2000_MEM_SIZE(49152)
bytes to process network packets. While receiving packets
via ne2000_receive() routine, a local 'index' variable
could exceed the ring buffer size, which could lead to a
memory buffer overflow. Added other checks at initialisation.
Reported-by: Qinghao Tang <luodalongde@gmail.com>
Signed-off-by: P J P <pjp@fedoraproject.org>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
(cherry picked from commit 9bbdbc66e5765068dce76e9269dce4547afd8ad4)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
|
|
While processing transmit descriptors, it could lead to an infinite
loop if 'bytes' was to become zero; Add a check to avoid it.
[The guest can force 'bytes' to 0 by setting the hdr_len and mss
descriptor fields to 0.
--Stefan]
Signed-off-by: P J P <pjp@fedoraproject.org>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-id: 1441383666-6590-1-git-send-email-stefanha@redhat.com
(cherry picked from commit b947ac2bf26479e710489739c465c8af336599e7)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
|
|
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.
Reported-by: 范祚至(库特) <zuozhi.fzz@alibaba-inc.com>
Reviewed-by: P J P <ppandit@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry picked from commit eb8934b0418b3b1d125edddc4fc334a54334a49b)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
|
|
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
|
|
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
|
|
virtio fix for 2.4
Fixes migration in virtio 1 mode.
We still have a known bug with memory hotplug, it doesn't
look like we can fix that in time for 2.4.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
# gpg: Signature made Wed 05 Aug 2015 15:57:39 BST using RSA key ID D28D5469
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>"
# gpg: aka "Michael S. Tsirkin <mst@redhat.com>"
* remotes/mst/tags/for_upstream:
virtio: fix 1.0 virtqueue migration
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
|
|
Commit 488981a4 [block: convert quorum blockdrv to use crypto APIs]
broke qemu-iotest 041 on hosts with GnuTLS < 2.10.0. It converted a
compile-time check to a run-time check at device open time. The result
is that we now advertise a feature (the quorum block driver) that will
never work (on those hosts). There's no way (short of parsing
human-readable error messages) for qemu-iotests or any other API
consumer to recognise that the quorum block driver isn't _actually_
available and shouldn't be used or tested.
Move the run-time check to bdrv_quorum_init() to avoid registering the
quorum block driver if we know it cannot work. This way API consumers
can recognise it's unavailable.
Fixes: 488981a4af396551a3178d032cc2b41d9553ada2
Signed-off-by: Sascha Silbe <silbe@linux.vnet.ibm.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Message-id: 1438699705-21761-1-git-send-email-silbe@linux.vnet.ibm.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
|
|
1.0 does not requires physically-contiguous pages layout for a
virtqueue. So we could not infer avail and used from desc. This means
we need to migrate vring.avail and vring.used when host support virtio
1.0. This fixes malfunction of virtio 1.0 device after migration.
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
|
|
staging
X86 queue, 2015-08-04
# gpg: Signature made Tue 04 Aug 2015 16:49:42 BST using RSA key ID 984DC5A6
# gpg: Good signature from "Eduardo Habkost <ehabkost@redhat.com>"
# 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: 5A32 2FD5 ABC4 D3DB ACCF D1AA 2807 936F 984D C5A6
* remotes/ehabkost/tags/x86-pull-request:
target-i386: fix IvyBridge xlevel in PC_COMPAT_2_3
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
|
|
Previous patch changed xlevel and missed the compatibility code.
Fixes: 3046bb5debc8 ("target-i386: emulate CPUID level of real hardware")
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
|
|
MIPS patches 2015-08-04
Changes:
* fix semihosting for microMIPS R6
* fix an abort when booting mips64 kernel with --enable-tcg-debug
# gpg: Signature made Tue 04 Aug 2015 12:32:17 BST using RSA key ID 0B29DA6B
# gpg: Good signature from "Leon Alrae <leon.alrae@imgtec.com>"
# 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: 8DD3 2F98 5495 9D66 35D4 4FC0 5211 8E3C 0B29 DA6B
* remotes/lalrae/tags/mips-20150804:
target-mips: Copy restrictions from ext/ins to dext/dins
target-mips: fix semihosting for microMIPS R6
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
|
|
The checks in dins is required to avoid triggering an assertion
in tcg_gen_deposit_tl. The check in dext is just for completeness.
Fold the other D cases in via fallthru.
In this case the errant dins appears to be data, not code, as
translation failed to stop after a break insn.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Reviewed-by: Leon Alrae <leon.alrae@imgtec.com>
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
|
|
In semihosting mode the SDBBP 1 instructions should trigger UHI syscall,
but in QEMU this does not happen for recently added microMIPS R6.
Consequently bare metal microMIPS R6 programs supporting UHI will not run.
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
|
|
into staging
cve-2015-5166
# gpg: Signature made Mon 03 Aug 2015 15:27:44 BST using RSA key ID 70E1AE90
# gpg: Good signature from "Stefano Stabellini <stefano.stabellini@eu.citrix.com>"
* remotes/sstabellini/tags/cve-2015-5166-tag:
Fix release_drive on unplugged devices (pci_piix3_xen_ide_unplug)
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
|
|
'remotes/sstabellini/tags/xen-migration-2.4-tag' into staging
xen-migration-2.4
# gpg: Signature made Mon 03 Aug 2015 17:18:36 BST using RSA key ID 70E1AE90
# gpg: Good signature from "Stefano Stabellini <stefano.stabellini@eu.citrix.com>"
* remotes/sstabellini/tags/xen-migration-2.4-tag:
migration: Fix regression for xenfv and pc,accel=xen machine.
migration: Fix global state with Xen.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
|
|
This fix migration from the same QEMU version and from previous QEMU
version.
>From the global state section, we don't need runstate with Xen. Right now,
the way the Xen toolstack knows when QEMU is ready is when QEMU reach
"running" runstate.
The configuration section and the section footers are not going to be
present in previous version of QEMU with xenfv machine, so we skip them.
The Xen toolstack libxenlight does not specify a particular version of the
'pc' machine, so migration from older version of QEMU used by Xen to newer
one would break due to missing "configuration" section and section footers.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
|
|
When doing migration via the QMP command xen_save_devices_state, the
current runstate is not store into the global state section. Also the
current runstate is not the one we want on the receiver side.
During migration, the Xen toolstack paused QEMU before save the devices
state. Also, the toolstack expect QEMU to autostart when the migration is
finished.
So this patch store "running" as it's current runstate.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
|
|
Commit 8e9b0d2 (ui: convert VNC websockets to use crypto APIs) dropped
the --enable-vnc-ws option but forgot to update the help text. Fix this.
Cc: Daniel P. Berrange <berrange@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 1437749257-3313-1-git-send-email-afaerber@suse.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
|
|
pci_piix3_xen_ide_unplug should completely unhook the unplugged
IDEDevice from the corresponding BlockBackend, otherwise the next call
to release_drive will try to detach the drive again.
Suggested-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
|
|
'remotes/stefanha/tags/rtl8139-cplus-tx-input-validation-pull-request' into staging
Pull request
# gpg: Signature made Mon Aug 3 13:08:25 2015 BST using RSA key ID 81AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>"
# gpg: aka "Stefan Hajnoczi <stefanha@gmail.com>"
* remotes/stefanha/tags/rtl8139-cplus-tx-input-validation-pull-request:
rtl8139: check TCP Data Offset field (CVE-2015-5165)
rtl8139: skip offload on short TCP header (CVE-2015-5165)
rtl8139: check IP Total Length field (CVE-2015-5165)
rtl8139: check IP Header Length field (CVE-2015-5165)
rtl8139: skip offload on short Ethernet/IP header (CVE-2015-5165)
rtl8139: drop tautologous if (ip) {...} statement (CVE-2015-5165)
rtl8139: avoid nested ifs in IP header parsing (CVE-2015-5165)
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
|
|
The TCP Data Offset field contains the length of the header. Make sure
it is valid and does not exceed the IP data length.
Reported-by: 朱东海(启路) <donghai.zdh@alibaba-inc.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
|
|
TCP Large Segment Offload accesses the TCP header in the packet. If the
packet is too short we must not attempt to access header fields:
tcp_header *p_tcp_hdr = (tcp_header*)(eth_payload_data + hlen);
int tcp_hlen = TCP_HEADER_DATA_OFFSET(p_tcp_hdr);
Reported-by: 朱东海(启路) <donghai.zdh@alibaba-inc.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
|
|
The IP Total Length field includes the IP header and data. Make sure it
is valid and does not exceed the Ethernet payload size.
Reported-by: 朱东海(启路) <donghai.zdh@alibaba-inc.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
|
|
The IP Header Length field was only checked in the IP checksum case, but
is used in other cases too.
Reported-by: 朱东海(启路) <donghai.zdh@alibaba-inc.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
|
|
Transmit offload features access Ethernet and IP headers the packet. If
the packet is too short we must not attempt to access header fields:
int proto = be16_to_cpu(*(uint16_t *)(saved_buffer + 12));
...
eth_payload_data = saved_buffer + ETH_HLEN;
...
ip = (ip_header*)eth_payload_data;
if (IP_HEADER_VERSION(ip) != IP_HEADER_VERSION_4) {
Reported-by: 朱东海(启路) <donghai.zdh@alibaba-inc.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
|
|
The previous patch stopped using the ip pointer as an indicator that the
IP header is present. When we reach the if (ip) {...} statement we know
ip is always non-NULL.
Remove the if statement to reduce nesting.
Reported-by: 朱东海(启路) <donghai.zdh@alibaba-inc.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
|
|
Transmit offload needs to parse packet headers. If header fields have
unexpected values the offload processing is skipped.
The code currently uses nested ifs because there is relatively little
input validation. The next patches will add missing input validation
and a goto label is more appropriate to avoid deep if statement nesting.
Reported-by: 朱东海(启路) <donghai.zdh@alibaba-inc.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
|
|
'remotes/aurel/tags/pull-tcg-mips-s390-20150803' into staging
TCG MIPS and S390 fixes for 2.4.
# gpg: Signature made Mon Aug 3 09:09:59 2015 BST using RSA key ID 1DDD8C9B
# gpg: Good signature from "Aurelien Jarno <aurelien@aurel32.net>"
# gpg: aka "Aurelien Jarno <aurelien@jarno.fr>"
# gpg: aka "Aurelien Jarno <aurel32@debian.org>"
# 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: 7746 2642 A9EF 94FD 0F77 196D BA9C 7806 1DDD 8C9B
* remotes/aurel/tags/pull-tcg-mips-s390-20150803:
tcg/mips: fix add2
tcg/s390x: Mask TCGMemOp appropriately for indexing
tcg/mips: Mask TCGMemOp appropriately for indexing
tcg/mips: fix TLB loading for BE host with 32-bit guests
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
|
|
# gpg: Signature made Fri Jul 31 23:24:06 2015 BST using RSA key ID AAFC390E
# gpg: Good signature from "John Snow (John Huston) <jsnow@redhat.com>"
# 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: FAEB 9711 A12C F475 812F 18F2 88A9 064D 1835 61EB
# Subkey fingerprint: F9B7 ABDB BCAC DF95 BE76 CBD0 7DEF 8106 AAFC 390E
* remotes/jnsnow/tags/ide-pull-request:
ahci: fix ICC mask definition
macio: re-add TRIM support
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
|
|
The add2 code in the tcg_out_addsub2 function doesn't take into account
the case where rl == al == bl. In that case we can't compute the carry
after the addition. As it corresponds to a multiplication by 2, the
carry bit is the bit 31.
While this is a corner case, this prevents x86-64 guests to boot on a
MIPS host.
Cc: qemu-stable@nongnu.org
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
|
|
Commit 2b7ec66f fixed TCGMemOp masking following the MO_AMASK addition,
but two cases were forgotten in the TCG S390 backend.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
|
|
Commit 2b7ec66f fixed TCGMemOp masking following the MO_AMASK addition,
but two cases were forgotten in the TCG MIPS backend.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
|
|
For 32-bit guest, we load a 32-bit address from the TLB, so there is no
need to compensate for the low or high part. This fixes 32-bit guests on
big-endian hosts.
Cc: qemu-stable@nongnu.org
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
|
|
There are likely others that could be updated, but we'll
go with a light touch for 2.4 for now.
Without the Unsigned specifier, this shifts bits into the
signed bit, which makes clang unhappy and could cause
unwanted behavior.
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 1437501721-24495-1-git-send-email-jsnow@redhat.com
|
|
Commit bd4214fc dropped TRIM support by mistake. Given it is still
advertised to the host when using a drive with discard=on, this cause
the IDE bus to hang when the host issues a TRIM command.
This patch fixes that by re-adding the TRIM code, ported to the new
new DMA implementation.
Cc: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Cc: John Snow <jsnow@redhat.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Message-id: 1438198068-32428-1-git-send-email-aurelien@aurel32.net
Signed-off-by: John Snow <jsnow@redhat.com>
|
|
Signed-off-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1438195252-21968-1-git-send-email-rth@twiddle.net
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
|
|
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
|
|
staging
Pull request
These fixes make dataplane work again after the notify_me optimization was
added. They also solve QEMUBH memory leaks and fix a bug in dataplane's
cleanup code.
# gpg: Signature made Wed Jul 29 14:50:26 2015 BST using RSA key ID 81AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>"
# gpg: aka "Stefan Hajnoczi <stefanha@gmail.com>"
* remotes/stefanha/tags/block-pull-request:
AioContext: force event loop iteration using BH
AioContext: avoid leaking BHs on cleanup
virtio-blk-dataplane: delete bottom half before the AioContext is freed
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
|
|
The notify_me optimization introduced in commit eabc97797310
("AioContext: fix broken ctx->dispatching optimization") skips
event_notifier_set() calls when the event loop thread is not blocked in
ppoll(2).
This optimization causes a deadlock if two aio_context_acquire() calls
race. notify_me = 0 during the race so the winning thread can enter
ppoll(2) unaware that the other thread is waiting its turn to acquire
the AioContext.
This patch forces ppoll(2) to return by scheduling a BH instead of
calling aio_notify().
The following deadlock with virtio-blk dataplane is fixed:
qemu ... -object iothread,id=iothread0 \
-drive if=none,id=drive0,file=test.img,... \
-device virtio-blk-pci,iothread=iothread0,drive=drive0
This command-line results in a hang early on without this patch.
Thanks to Paolo Bonzini <pbonzini@redhat.com> for investigating this bug
with me.
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1438101249-25166-4-git-send-email-pbonzini@redhat.com
Message-Id: <1438014819-18125-3-git-send-email-stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
|
|
BHs are freed during aio_bh_poll(). This leads to memory leaks if there
is no aio_bh_poll() between qemu_bh_delete() and aio_ctx_finalize().
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1438101249-25166-3-git-send-email-pbonzini@redhat.com
Message-Id: <1438014819-18125-2-git-send-email-stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
|
|
Other uses of aio_bh_new are safe as long as all scheduled bottom
halves are run before an iothread is destroyed, which bdrv_drain will
ensure:
- archipelago_finish_aiocb: BH deletes itself
- inject_error: BH deletes itself
- blkverify_aio_bh: BH deletes itself
- abort_aio_request: BH deletes itself
- curl_aio_readv: BH deletes itself
- gluster_finish_aiocb: BH deletes itself
- bdrv_aio_rw_vector: BH deletes itself
- bdrv_co_maybe_schedule_bh: BH deletes itself
- iscsi_schedule_bh, iscsi_co_generic_cb: BH deletes itself
- laio_attach_aio_context: deleted in laio_detach_aio_context,
called through bdrv_detach_aio_context before deleting the iothread
- nfs_co_generic_cb: BH deletes itself
- null_aio_common: BH deletes itself
- qed_aio_complete: BH deletes itself
- rbd_finish_aiocb: BH deletes itself
- dma_blk_cb: BH deletes itself
- virtio_blk_dma_restart_cb: BH deletes itself
- qemu_bh_new: main loop AioContext is never destroyed
- test-aio.c: bh_delete_cb deletes itself, otherwise deleted in
the same function that calls aio_bh_new
Reported-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1438101249-25166-2-git-send-email-pbonzini@redhat.com
Message-Id: <1438086628-13000-1-git-send-email-pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
|
|
staging
Pull request
These two .can_receive() are now reviewed. The net subsystem queue for 2.4 is now empty.
# gpg: Signature made Tue Jul 28 13:26:03 2015 BST using RSA key ID 81AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>"
# gpg: aka "Stefan Hajnoczi <stefanha@gmail.com>"
* remotes/stefanha/tags/net-pull-request:
xen: Drop net_rx_ok
hw/net: handle flow control in mcf_fec driver receiver
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
|
|
virtio fixes for 2.4
Mostly virtio 1 spec compliance fixes.
We are unlikely to make it perfectly compliant in
the first release, but it seems worth it to try.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
# gpg: Signature made Mon Jul 27 21:55:48 2015 BST using RSA key ID D28D5469
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>"
# gpg: aka "Michael S. Tsirkin <mst@redhat.com>"
* remotes/mst/tags/for_upstream:
virtio: minor cleanup
acpi: fix pvpanic device is not shown in ui
virtio-blk: only clear VIRTIO_F_ANY_LAYOUT for legacy device
virtio-blk: fail get_features when both scsi and 1.0 were set
virtio: get_features() can fail
virtio-pci: fix memory MR cleanup for modern
virtio: set any_layout in virtio core
virtio-9p: fix any_layout
virtio-serial: fix ANY_LAYOUT
virtio: hide legacy features from modern guests
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
|
