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2018-01-08fsdev: improve error handling of backend initGreg Kurz
This patch changes some error messages in the backend init code and convert backends to propagate QEMU Error objects instead of calling error_report(). One notable improvement is that the local backend now provides a more detailed error report when it fails to open the shared directory. Signed-off-by: Greg Kurz <groug@kaod.org>
2018-01-08fsdev: improve error handling of backend opts parsingGreg Kurz
This patch changes some error messages in the backend opts parsing code and convert backends to propagate QEMU Error objects instead of calling error_report(). Signed-off-by: Greg Kurz <groug@kaod.org>
2018-01-08tests: virtio-9p: set DRIVER_OK before using the deviceGreg Kurz
Signed-off-by: Greg Kurz <groug@kaod.org>
2018-01-08tests: virtio-9p: fix ISR dependenceGreg Kurz
Like other virtio tests, use the used ring APIs instead of assuming ISR being set means the request has completed. Signed-off-by: Greg Kurz <groug@kaod.org> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
2018-01-089pfs: make pdu_marshal() and pdu_unmarshal() static functionsGreg Kurz
They're only used by the 9p core code. Signed-off-by: Greg Kurz <groug@kaod.org> Reviewed-by: Eric Blake <eblake@redhat.com>
2018-01-089pfs: fix error path in pdu_submit()Greg Kurz
If we receive an unsupported request id, we first decide to return -ENOTSUPP to the client, but since the request id causes is_read_only_op() to return false, we change the error to be -EROFS if the fsdev is read-only. This doesn't make sense since we don't know what the client asked for. This patch ensures that -EROFS can only be returned if the request id is supported. Signed-off-by: Greg Kurz <groug@kaod.org> Reviewed-by: Eric Blake <eblake@redhat.com>
2018-01-089pfs: fix type in *_parse_opts declarationsGreg Kurz
To comply with the QEMU coding style. Signed-off-by: Greg Kurz <groug@kaod.org> Reviewed-by: Eric Blake <eblake@redhat.com>
2018-01-089pfs: handle: fix type definitionGreg Kurz
To comply with the QEMU coding style. Signed-off-by: Greg Kurz <groug@kaod.org>
2018-01-089pfs: fix some type definitionsGreg Kurz
To comply with the QEMU coding style. Signed-off-by: Greg Kurz <groug@kaod.org>
2018-01-08fsdev: fix some type definitionsGreg Kurz
To comply with the QEMU coding style. Signed-off-by: Greg Kurz <groug@kaod.org>
2018-01-089pfs: fix XattrOperations typedefGreg Kurz
To comply with the QEMU coding style. Signed-off-by: Greg Kurz <groug@kaod.org>
2018-01-08virtio-9p: move unrealize/realize after virtio_9p_transport definitionGreg Kurz
And drop the now useless forward declaration of virtio_9p_transport. Signed-off-by: Greg Kurz <groug@kaod.org>
2018-01-08Merge remote-tracking branch 'remotes/jasowang/tags/net-pull-request' into ↵Peter Maydell
staging # gpg: Signature made Fri 22 Dec 2017 02:12:29 GMT # gpg: using RSA key 0xEF04965B398D6211 # gpg: Good signature from "Jason Wang (Jason Wang on RedHat) <jasowang@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: 215D 46F4 8246 689E C77F 3562 EF04 965B 398D 6211 * remotes/jasowang/tags/net-pull-request: qemu-doc: Update the deprecation information of -tftp, -bootp, -redir and -smb qemu-doc: The "-net nic" option can be used with "netdev=...", too net: Remove the legacy "-net channel" parameter net: remove unused compute_mcast_idx() function rtl8139: use inline net_crc32() and bitshift instead of compute_mcast_idx() ne2000: use inline net_crc32() and bitshift instead of compute_mcast_idx() ftgmac100: use inline net_crc32() and bitshift instead of compute_mcast_idx() lan9118: use inline net_crc32() and bitshift instead of compute_mcast_idx() opencores_eth: use inline net_crc32() and bitshift instead of compute_mcast_idx() eepro100: use inline net_crc32() and bitshift instead of compute_mcast_idx() sungem: fix multicast filter CRC calculation sunhme: switch sunhme over to use net_crc32_le() eepro100: switch eepro100 e100_compute_mcast_idx() over to use net_crc32() pcnet: switch pcnet over to use net_crc32_le() net: introduce net_crc32_le() function net: move CRC32 calculation from compute_mcast_idx() into its own net_crc32() function e1000: Separate TSO and non-TSO contexts, fixing UDP TX corruption e1000, e1000e: Move per-packet TX offload flags out of context state Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-12-22qemu-doc: Update the deprecation information of -tftp, -bootp, -redir and -smbThomas Huth
The information how to update the deprecated parameters was too scarce, so that some people did not update to the new syntax yet. Provide some more information to make sure that it is clear how to update from the old syntax to the new one. Signed-off-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Jason Wang <jasowang@redhat.com>
2017-12-22qemu-doc: The "-net nic" option can be used with "netdev=...", tooThomas Huth
Looks like we missed to document that it is also possible to specify a netdev with "-net nic" - which is very useful if you want to configure your on-board NIC to use a backend that has been specified with "-netdev". Signed-off-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Jason Wang <jasowang@redhat.com>
2017-12-22net: Remove the legacy "-net channel" parameterThomas Huth
It has never been documented, so hardly anybody knows about this parameter, and it is marked as deprecated since QEMU v2.6. Time to let it go now. Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Signed-off-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Jason Wang <jasowang@redhat.com>
2017-12-22net: remove unused compute_mcast_idx() functionMark Cave-Ayland
Now that all of the callers have been converted to compute the multicast index inline using new net CRC functions, this function can now be dropped. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Signed-off-by: Jason Wang <jasowang@redhat.com>
2017-12-22rtl8139: use inline net_crc32() and bitshift instead of compute_mcast_idx()Mark Cave-Ayland
This makes it much easier to compare the multicast CRC calculation endian and bitshift against the Linux driver implementation. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Signed-off-by: Jason Wang <jasowang@redhat.com>
2017-12-22ne2000: use inline net_crc32() and bitshift instead of compute_mcast_idx()Mark Cave-Ayland
This makes it much easier to compare the multicast CRC calculation endian and bitshift against the Linux driver implementation. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Signed-off-by: Jason Wang <jasowang@redhat.com>
2017-12-22ftgmac100: use inline net_crc32() and bitshift instead of compute_mcast_idx()Mark Cave-Ayland
This makes it much easier to compare the multicast CRC calculation endian and bitshift against the Linux driver implementation. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Signed-off-by: Jason Wang <jasowang@redhat.com>
2017-12-22lan9118: use inline net_crc32() and bitshift instead of compute_mcast_idx()Mark Cave-Ayland
This makes it much easier to compare the multicast CRC calculation endian and bitshift against the Linux driver implementation. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Signed-off-by: Jason Wang <jasowang@redhat.com>
2017-12-22opencores_eth: use inline net_crc32() and bitshift instead of ↵Mark Cave-Ayland
compute_mcast_idx() This makes it much easier to compare the multicast CRC calculation endian and bitshift against the Linux driver implementation. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Signed-off-by: Jason Wang <jasowang@redhat.com>
2017-12-22eepro100: use inline net_crc32() and bitshift instead of compute_mcast_idx()Mark Cave-Ayland
This makes it much easier to compare the multicast CRC calculation endian and bitshift against the Linux driver implementation. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Signed-off-by: Jason Wang <jasowang@redhat.com>
2017-12-22sungem: fix multicast filter CRC calculationMark Cave-Ayland
From the Linux sungem driver, we know that the multicast filter CRC is implemented using ether_crc_le() which isn't the same as calling zlib's crc32() function (the zlib implementation requires a complemented initial value and also returns the complemented result). Fix the multicast filter by simply using the new net_crc32_le() function. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Jason Wang <jasowang@redhat.com>
2017-12-22sunhme: switch sunhme over to use net_crc32_le()Mark Cave-Ayland
Instead of sunhme_crc32_le() using its own implementation, we can simply call net_crc32_le() directly and apply the bit shift inline. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Jason Wang <jasowang@redhat.com>
2017-12-22eepro100: switch eepro100 e100_compute_mcast_idx() over to use net_crc32()Mark Cave-Ayland
Instead of e100_compute_mcast_idx() using its own implementation, we can simply call net_crc32() directly and apply the bit shift inline. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Reviewed-by: Stefan Weil <sw@weilnetz.de> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Jason Wang <jasowang@redhat.com>
2017-12-22pcnet: switch pcnet over to use net_crc32_le()Mark Cave-Ayland
Instead of lnc_mchash() using its own implementation, we can simply call net_crc32_le() directly and apply the bit shift inline. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Jason Wang <jasowang@redhat.com>
2017-12-22net: introduce net_crc32_le() functionMark Cave-Ayland
This provides a standard ethernet CRC32 little-endian implementation. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Jason Wang <jasowang@redhat.com>
2017-12-22net: move CRC32 calculation from compute_mcast_idx() into its own ↵Mark Cave-Ayland
net_crc32() function Separate out the standard ethernet CRC32 calculation into a new net_crc32() function, renaming the constant POLYNOMIAL to POLYNOMIAL_BE to make it clear that this is a big-endian CRC32 calculation. As part of the constant rename, remove the duplicate definition of POLYNOMIAL from eepro100.c and use the new POLYNOMIAL_BE constant instead. Once this is complete remove the existing CRC32 implementation from compute_mcast_idx() and call the new net_crc32() function in its place. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Jason Wang <jasowang@redhat.com>
2017-12-22e1000: Separate TSO and non-TSO contexts, fixing UDP TX corruptionEd Swierk via Qemu-devel
The device is supposed to maintain two distinct contexts for transmit offloads: one has parameters for both segmentation and checksum offload, the other only for checksum offload. The guest driver can send two context descriptors, one for each context (the TSE flag specifies which). Then the guest can refer to one or the other context in subsequent transmit data descriptors, depending on what offloads it wants applied to each packet. Currently the e1000 device stores just one context, and misinterprets the TSE flags in the context and data descriptors. This is often okay: Linux happens to send a fresh context descriptor before every data descriptor, so forgetting the other context doesn't matter. Windows does rely on separate contexts for TSO vs. non-TSO packets, but for mostly-TCP traffic the two contexts have identical TCP-specific offload parameters so confusing them doesn't matter. One case where this confusion matters is when a Windows guest sets up a TSO context for TCP and a non-TSO context for UDP, and then transmits both TCP and UDP traffic in parallel. The e1000 device sometimes ends up using TCP-specific parameters while doing checksum offload on a UDP datagram: it writes the checksum to offset 16 (the correct location for a TCP checksum), stomping on two bytes of UDP data, and leaving the wrong value in the actual UDP checksum field at offset 6. (Even worse, the host network stack may then recompute the UDP checksum, "correcting" it to match the corrupt data before sending it out a physical interface.) Correct this by tracking the TSO context independently of the non-TSO context, and selecting the appropriate context based on the TSE flag in each transmit data descriptor. Signed-off-by: Ed Swierk <eswierk@skyportsystems.com> Signed-off-by: Jason Wang <jasowang@redhat.com>
2017-12-22e1000, e1000e: Move per-packet TX offload flags out of context stateEd Swierk via Qemu-devel
sum_needed and cptse flags are received from the guest within each transmit data descriptor. They are not part of the offload context; instead, they determine how to apply a previously received context to the packet being transmitted: - If cptse is set, perform both segmentation and checksum offload using the parameters in the TSO context; otherwise just do checksum offload. (Currently the e1000 device incorrectly stores only one context, which will be fixed in a subsequent patch.) - Depending on the bits set in sum_needed, possibly perform L4 checksum offload and/or IP checksum offload, using the parameters in the appropriate context. Move these flags out of struct e1000x_txd_props, which is otherwise dedicated to storing values from a context descriptor, and into the per-packet TX struct. Signed-off-by: Ed Swierk <eswierk@skyportsystems.com> Signed-off-by: Jason Wang <jasowang@redhat.com>
2017-12-22Merge remote-tracking branch ↵Peter Maydell
'remotes/vivier/tags/m68k-for-2.12-pull-request' into staging # gpg: Signature made Thu 21 Dec 2017 19:35:00 GMT # gpg: using RSA key 0xF30C38BD3F2FBE3C # gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" # gpg: aka "Laurent Vivier <laurent@vivier.eu>" # gpg: aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>" # Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F 5173 F30C 38BD 3F2F BE3C * remotes/vivier/tags/m68k-for-2.12-pull-request: tests/boot-serial-test: Add support for the mcf5208evb board target/m68k: fix set_cc_op() target/m68k: add monitor.c target/m68k: remove unused variable gen_throws_exception Split adb.c into adb.c, adb-mouse.c and adb-kbd.c Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-12-21hw/i386/vmport: fix missing definitions with non-log trace backendsLaurent Vivier
When compiled with anything other than the 'log' trace backend, we have: error: implicit declaration of function 'qemu_log_mask' error: 'LOG_UNIMP' undeclared (first use in this function) This patch adds the missing include. Fixes: 7299e1a411 ("hw/i386/vmport: replace fprintf() by trace events or LOG_UNIMP") Signed-off-by: Laurent Vivier <laurent@vivier.eu> Message-id: 20171221211103.30311-1-laurent@vivier.eu [PMM: fixed commit message description of when problem occurs] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-12-21tests/boot-serial-test: Add support for the mcf5208evb boardThomas Huth
We can output a character quite easily here with some few lines of assembly that we provide as a mini-kernel for this board. Signed-off-by: Thomas Huth <thuth@redhat.com> Message-Id: <1512031988-32490-4-git-send-email-thuth@redhat.com> [lv: add boot-serial-test in check-qtest-m68k] Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2017-12-21target/m68k: fix set_cc_op()Laurent Vivier
The first call of set_cc_op() in a new translation sequence is done with old_op set to CC_OP_DYNAMIC (-1). This will do an out of bound access to the array cc_op_live[]. We fix that by adding an entry in cc_op_live[] for CC_OP_DYNAMIC. Reported-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20171221160558.14151-1-laurent@vivier.eu>
2017-12-21target/m68k: add monitor.cLaurent Vivier
This allows to use registers content in the monitor. Example: BEFORE: (qemu) print $d0 unknown register AFTER: (qemu) print $d0 0 (qemu) print $sr 0x2000 (qemu) x/10i $pc 0x40010a2a: movew %sr,%d0 0x40010a2c: oril #1792,%d0 0x40010a32: movew %d0,%sr 0x40010a34: movel %a0@,%d0 0x40010a36: btst #3,%d0 0x40010a3a: beqs 0x40010a26 0x40010a3c: movew %sr,%d0 0x40010a3e: andil #63743,%d0 0x40010a44: movew %d0,%sr 0x40010a46: rts Signed-off-by: Laurent Vivier <laurent@vivier.eu> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Thomas Huth <huth@tuxfamily.org> Message-Id: <20171221083057.17942-1-laurent@vivier.eu>
2017-12-21target/m68k: remove unused variable gen_throws_exceptionLaurent Vivier
It has been introduced by e6e5906b6e ("ColdFire target."), but the content is never used. Signed-off-by: Laurent Vivier <laurent@vivier.eu> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Thomas Huth <huth@tuxfamily.org> Message-Id: <20171220130815.20708-1-laurent@vivier.eu>
2017-12-21Split adb.c into adb.c, adb-mouse.c and adb-kbd.cLaurent Vivier
It makes the code clearer to separate the bus implementation from the devices one. Replace ADB_DPRINTF() with trace events (and adding new ones in adb-kbd.c). Some minor changes to make checkpatch.pl happy. Signed-off-by: Laurent Vivier <laurent@vivier.eu> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Message-Id: <20171220121406.24056-1-laurent@vivier.eu>
2017-12-21Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into stagingPeter Maydell
* NBD and chardev conversion to QIONetListener (Daniel) * MTTCG fixes (David) * Hyper-V fixes (Roman, Evgeny) * share-rw option (Fam) * Mux chardev event bugfix (Marc-André) * Add systemd unit files in contrib/ (me) * SCSI and block/iscsi.c bugfixes (me, Peter L.) * unassigned_mem_ops fixes (Peter M.) * VEX decoding fix (Peter M.) * "info pic" and "info irq" improvements (Peter Xu) * vmport trace events (Philippe) * Braille chardev bugfix (Samuel) * Compiler warnings fix (Stefan) * initial support for TCG smoke test of more boards (Thomas) * New CPU features (Yang) * Reduce startup memory usage (Yang) * QemuThread race fix (linhecheng) # gpg: Signature made Thu 21 Dec 2017 08:30:49 GMT # gpg: using RSA key 0xBFFBD25F78C7AE83 # gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" # gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" # 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: (41 commits) chardev: convert the socket server to QIONetListener blockdev: convert qemu-nbd server to QIONetListener blockdev: convert internal NBD server to QIONetListener test: add some chardev mux event tests chardev: fix backend events regression with mux chardev rcu: reduce more than 7MB heap memory by malloc_trim() checkpatch: volatile with a comment or sig_atomic_t is okay i8259: move TYPE_INTERRUPT_STATS_PROVIDER upper kvm-i8259: support "info pic" and "info irq" i8259: generalize statistics into common code i8259: use DEBUG_IRQ_COUNT always i8259: convert DPRINTFs into trace Remove legacy -no-kvm-pit option scsi: replace hex constants with #defines scsi: provide general-purpose functions to manage sense data hw/i386/vmport: replace fprintf() by trace events or LOG_UNIMP hw/mips/boston: Remove workaround for writes to ROM aborting exec: Don't reuse unassigned_mem_ops for io_mem_rom block/iscsi: only report an iSCSI Failure if we don't handle it gracefully block/iscsi: dont leave allocmap in an invalid state on UNMAP failure ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-12-21Merge remote-tracking branch 'remotes/famz/tags/staging-pull-request' into ↵Peter Maydell
staging # gpg: Signature made Thu 21 Dec 2017 01:51:20 GMT # gpg: using RSA key 0xCA35624C6A9171C6 # gpg: Good signature from "Fam Zheng <famz@redhat.com>" # Primary key fingerprint: 5003 7CB7 9706 0F76 F021 AD56 CA35 624C 6A91 71C6 * remotes/famz/tags/staging-pull-request: util: add is_equal to UUID API Revert "docker: Enable features explicitly in test-full" Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-12-21chardev: convert the socket server to QIONetListenerDaniel P. Berrange
Instead of creating a QIOChannelSocket directly for the chardev server socket, use a QIONetListener. This provides the ability to listen on multiple sockets at the same time, so enables full support for IPv4/IPv6 dual stack. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-Id: <20171218135417.28301-2-berrange@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-12-21blockdev: convert qemu-nbd server to QIONetListenerDaniel P. Berrange
Instead of creating a QIOChannelSocket directly for the NBD server socket, use a QIONetListener. This provides the ability to listen on multiple sockets at the same time, so enables full support for IPv4/IPv6 dual stack. This also means we can honour multiple FDs received during socket activation. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-Id: <20171218101643.20360-3-berrange@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-12-21blockdev: convert internal NBD server to QIONetListenerDaniel P. Berrange
Instead of creating a QIOChannelSocket directly for the NBD server socket, use a QIONetListener. This provides the ability to listen on multiple sockets at the same time, so enables full support for IPv4/IPv6 dual stack. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-Id: <20171218101643.20360-2-berrange@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-12-21test: add some chardev mux event testsMarc-André Lureau
Check the expected behaviour of qemu_chr_be_event() on a mux chardev. For some reason, sending the event on the base chardev broadcast to all frontends, while sending it on the mux chardev itself should trigger the event on the currently focused chardev frontend. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20171103152824.21948-3-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-12-21chardev: fix backend events regression with mux chardevMarc-André Lureau
Kirill noticied that on recent versions on QEMU he was not able to trigger SysRq to invoke debug capabilites of Linux Kernel. He tracked it down to qemu_chr_be_event() ignoring CHR_EVENT_BREAK due s->be being NULL. The bug was introduced in 2.8, commit a4afa548fc6d ("char: move front end handlers in CharBackend"). Since the commit, the qemu_chr_be_event() failed to deliver CHR_EVENT_BREAK due to qemu_chr_fe_init() does not set s->be in case of mux. Let's fix this by teaching mux to send an event to the frontend with the focus. Reported-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Fixes: a4afa548fc6d ("char: move front end handlers in CharBackend") Message-Id: <20171103152824.21948-2-marcandre.lureau@redhat.com> Tested-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-12-21rcu: reduce more than 7MB heap memory by malloc_trim()Yang Zhong
Since there are some issues in memory alloc/free machenism in glibc for little chunk memory, if Qemu frequently alloc/free little chunk memory, the glibc doesn't alloc little chunk memory from free list of glibc and still allocate from OS, which make the heap size bigger and bigger. This patch introduce malloc_trim(), which will free heap memory when there is no rcu call during rcu thread loop. malloc_trim() can be enabled/disabled by --enable-malloc-trim/ --disable-malloc-trim in the Qemu configure command. The default malloc_trim() is enabled for libc. Below are test results from smaps file. (1)without patch 55f0783e1000-55f07992a000 rw-p 00000000 00:00 0 [heap] Size: 21796 kB Rss: 14260 kB Pss: 14260 kB (2)with patch 55cc5fadf000-55cc61008000 rw-p 00000000 00:00 0 [heap] Size: 21668 kB Rss: 6940 kB Pss: 6940 kB Signed-off-by: Yang Zhong <yang.zhong@intel.com> Message-Id: <1513775806-19779-1-git-send-email-yang.zhong@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-12-21checkpatch: volatile with a comment or sig_atomic_t is okayMarc-André Lureau
This assumes that the comment gives some justification; "volatile sig_atomic_t" is also self-explanatory and usually correct. Discussed in: '[Qemu-devel] [PATCH] dump-guest-memory.py: fix "You can't do that without a process to debug"' Suggested-by: Fam Zheng <famz@redhat.com> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20171215181810.4122-1-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-12-21i8259: move TYPE_INTERRUPT_STATS_PROVIDER upperPeter Xu
Now both classes (i8259, i8259-kvm) support this. Move this upper to the common class code. Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <20171210063819.14892-6-peterx@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-12-21kvm-i8259: support "info pic" and "info irq"Peter Xu
Let's leverage the i8259 common code for kvm-i8259 too. I think it's still possible that stats can lost when i8259 is in kernel and meanwhile when irqfd is used, e.g., by vfio or vhost devices. However that should be rare IMHO since they should be using MSIs mostly if they really want performance (that's why people use vhost and device assignment), and no old INTx should be used. As long as the INTx users are emulated in QEMU the stats will be correct. For "info pic", it should be always accurate since we fetch kvm regs before dump. More importantly, it's just too simple to do this now - it's only 10+ LOC to gain this feature. Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <20171210063819.14892-5-peterx@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-12-21i8259: generalize statistics into common codePeter Xu
It was only for userspace i8259. Move it to general code so that kvm-i8259 can also use it in the future. Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <20171210063819.14892-4-peterx@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>