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2015-10-26ivshmem: use kvm irqfd for msi notificationsMarc-André Lureau1-6/+174
Use irqfd for improving context switch when notifying the guest. If the host doesn't support kvm irqfd, regular msi notifications are still supported. Note: the ivshmem implementation doesn't allow switching between MSI and IO interrupts, this patch doesn't either. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2015-10-26ivshmem: rename MSI eventfd_tableMarc-André Lureau1-9/+9
The array is used to have vector specific data, so use a more descriptive name. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-26ivshmem: remove EventfdEntry.vectorMarc-André Lureau1-4/+4
No need to store an extra int for the vector number when it can be computed easily by looking at the position in the array. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-26ivshmem: add hostmem backendMarc-André Lureau1-18/+66
Instead of handling allocation, teach ivshmem to use a memory backend. This allows to use hugetlbfs backed memory now. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-26ivshmem: use qemu_strtosz()Marc-André Lureau1-31/+5
Use the common qemu utility function to parse the memory size. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-26ivshmem: do not keep shm_fd openMarc-André Lureau1-11/+5
Remove shm_fd from device state, closing it as early as possible to avoid leaks. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24msix: implement pba write (but read-only)Marc-André Lureau1-0/+6
qpci_msix_pending() writes on pba region, causing qemu to SEGV: Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7ffff7fba8c0 (LWP 25882)] 0x0000000000000000 in ?? () (gdb) bt #0 0x0000000000000000 in () #1 0x00005555556556c5 in memory_region_oldmmio_write_accessor (mr=0x5555579f3f80, addr=0, value=0x7fffffffbf68, size=4, shift=0, mask=4294967295, attrs=...) at /home/elmarco/src/qemu/memory.c:434 #2 0x00005555556558e1 in access_with_adjusted_size (addr=0, value=0x7fffffffbf68, size=4, access_size_min=1, access_size_max=4, access=0x55555565563e <memory_region_oldmmio_write_accessor>, mr=0x5555579f3f80, attrs=...) at /home/elmarco/src/qemu/memory.c:506 #3 0x00005555556581eb in memory_region_dispatch_write (mr=0x5555579f3f80, addr=0, data=0, size=4, attrs=...) at /home/elmarco/src/qemu/memory.c:1176 #4 0x000055555560b6f9 in address_space_rw (as=0x555555eff4e0 <address_space_memory>, addr=3759147008, attrs=..., buf=0x7fffffffc1b0 "", len=4, is_write=true) at /home/elmarco/src/qemu/exec.c:2439 #5 0x000055555560baa2 in cpu_physical_memory_rw (addr=3759147008, buf=0x7fffffffc1b0 "", len=4, is_write=1) at /home/elmarco/src/qemu/exec.c:2534 #6 0x000055555564c005 in cpu_physical_memory_write (addr=3759147008, buf=0x7fffffffc1b0, len=4) at /home/elmarco/src/qemu/include/exec/cpu-common.h:80 #7 0x000055555564cd9c in qtest_process_command (chr=0x55555642b890, words=0x5555578de4b0) at /home/elmarco/src/qemu/qtest.c:378 #8 0x000055555564db77 in qtest_process_inbuf (chr=0x55555642b890, inbuf=0x55555641b340) at /home/elmarco/src/qemu/qtest.c:569 #9 0x000055555564dc07 in qtest_read (opaque=0x55555642b890, buf=0x7fffffffc2e0 "writel 0xe0100800 0x0\n", size=22) at /home/elmarco/src/qemu/qtest.c:581 #10 0x000055555574ce3e in qemu_chr_be_write (s=0x55555642b890, buf=0x7fffffffc2e0 "writel 0xe0100800 0x0\n", len=22) at qemu-char.c:306 #11 0x0000555555751263 in tcp_chr_read (chan=0x55555642bcf0, cond=G_IO_IN, opaque=0x55555642b890) at qemu-char.c:2876 #12 0x00007ffff64c9a8a in g_main_context_dispatch (context=0x55555641c400) at gmain.c:3122 (without this patch, this can be reproduced with the ivshmem qtest) Implement an empty mmio write to avoid the crash. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2015-10-24ivshmem: add check on protocol version in QEMUDavid Marchand1-2/+29
Send a protocol version as the first message from server, clients must close communication if they don't support this protocol version. Older QEMUs should be fine with this change in the protocol since they overrides their own vm_id on reception of an id associated to no eventfd. Signed-off-by: David Marchand <david.marchand@6wind.com> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> [use fifo_update_and_get()] Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: reset mask on device resetMarc-André Lureau1-0/+1
The interrupt mask is a state value, it should be reset, like the interrupt status. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: error on too many eventfd receivedMarc-André Lureau1-0/+7
The number of eventfd that can be handled per peer is limited by the number of vectors. Return an error when receiving too many of them. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: replace 'guest' for 'peer' appropriatelyMarc-André Lureau1-14/+14
The terms 'guest' and 'peer' are used sometime interchangeably which may be confusing. Instead, use 'peer' for the remote instances of ivshmem clients, and 'guest' for the local VM. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: fix pci_ivshmem_exit()Marc-André Lureau1-3/+35
Free all objects owned by the device, making sure the device is free, fixing hot-unplug. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: add device descriptionMarc-André Lureau1-0/+1
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: check shm isn't already initializedMarc-André Lureau1-0/+6
The server should not change the shm, and this isn't handled by qemu and we should should verify this in qemu. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: shmfd can be 0Marc-André Lureau1-3/+3
0 is a valid fd value, so change conditions and set -1 value early Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: migrate with VMStateDescriptionMarc-André Lureau1-53/+89
load_state_old() is used to keep compatibility with version 0. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: use common is_power_of_2()Marc-André Lureau1-5/+1
The common version correctly checks for 0 value case. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: use common returnMarc-André Lureau1-2/+1
Both if branches return, move this out to common end. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: simplify a bit the codeMarc-André Lureau1-14/+14
Use some more explicit variables to simplify the code. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: print error on invalid peer idMarc-André Lureau1-0/+1
The server shouldn't send invalid peer id, so print an error if it's the case. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: improve error handlingMarc-André Lureau1-3/+7
The test whether the chardev is an AF_UNIX socket rejects "-chardev socket,id=chr0,path=/tmp/foo,server,nowait -device ivshmem,chardev=chr0", but fails to explain why. Use an explicit error on why a chardev may be rejected. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: improve debug messagesMarc-André Lureau1-3/+7
Some misc improvements to ivshmem debug. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: remove max_peer fieldMarc-André Lureau1-9/+1
max_peer isn't really useful, it tracks the maximum received VM id, but that quickly matches nb_peers, the size of the peers array. Since VM come and go, there might be sparse peers so it doesn't help much in general to have this value around. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: initialize max_peer to -1Marc-André Lureau1-2/+2
There is no peer when device is initialized, do not let doorbell for inexisting peer 0. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: remove useless ivshmem_update_irq() val argumentMarc-André Lureau1-4/+4
val isn't used in ivshmem_update_irq() function. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: allocate eventfds in resize_peers()Marc-André Lureau1-9/+2
It simplifies a bit the code to allocate the array when setting the number of peers instead of lazily when receiving the first vector. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: simplify around increase_dynamic_storage()Marc-André Lureau1-16/+11
Set the number of peers and array allocation in a single place. Rename to better reflect the function content. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: limit maximum number of peers to G_MAXUINT16Marc-André Lureau1-2/+3
Limit the maximum number of peers to MAXUINT16. This is more realistic and better matches the limit of the doorbell register. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: remove last exit(1)Marc-André Lureau1-1/+1
Failing to create a chardev shouldn't be fatal. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: more qdev conversionMarc-André Lureau1-51/+68
Use the latest qemu device modeling API, in particular, convert to realize to fix the error handling; right now a botched device_add ivhsmem command kills the VM. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: remove useless doorbell fieldMarc-André Lureau1-1/+0
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: remove superflous ivshmem_attr fieldMarc-André Lureau1-9/+7
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: remove unnecessary dup()Marc-André Lureau1-15/+6
qemu_chr_fe_get_msgfd() transfers ownership, there is no need to dup the fd. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: factor out the incoming fifo handlingMarc-André Lureau1-20/+39
Make a new function fifo_update_and_get() that can be reused by other functions (in next commits). Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivshmem: fix number of bytes to push to fifoMarc-André Lureau1-1/+1
If the fifo has 0 bytes, and the read is of size 1, the call to fifo8_push_all() will copy off boundary data. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-24ivhsmem: read do not accept more than sizeof(long)Marc-André Lureau1-1/+1
ivshmem_read() only reads sizeof(long) from the input buffer. Accepting more could lead to fifo8 abort() on 32bit systems if fifo is not empty. A following patch will change the protocol to 64-bit little-endian instead. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
2015-10-23dataplane: Mark host notifiers' client type as "external"Fam Zheng2-13/+10
They will be excluded by type in the nested event loops in block layer, so that unwanted events won't be processed there. Signed-off-by: Fam Zheng <famz@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-10-23aio: Add "is_external" flag for event handlersFam Zheng2-10/+20
All callers pass in false, and the real external ones will switch to true in coming patches. Signed-off-by: Fam Zheng <famz@redhat.com> Reviewed-by: Jeff Cody <jcody@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-10-23block: Prepare for NULL BDSMax Reitz1-1/+3
blk_bs() will not necessarily return a non-NULL value any more (unless blk_is_available() is true or it can be assumed to otherwise, e.g. because it is called immediately after a successful blk_new_with_bs() or blk_new_open()). Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-10-23hw/usb-storage: Check whether BB is insertedMax Reitz1-14/+16
Only call bdrv_add_key() on the BlockDriverState if it is not NULL. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-10-23hw/block/fdc: Implement tray statusMax Reitz1-4/+16
The tray of an FDD is open iff there is no medium inserted (there are only two states for an FDD: "medium inserted" or "no medium inserted"). Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-10-23Merge remote-tracking branch 'remotes/dgibson/tags/ppc-next-20151023' into ↵Peter Maydell16-40/+136
staging ppc patch queue - 2015-10-23 sPAPR highlights: * Allow VFIO devices on the spapr-pci-host-bridge * Allow virtio VGA * Safer handling of HTAB allocation * ibm,pa-features device tree property non-sPAPR highlights: * Categorization of many ppc specific devices in help output * Tweaks to MMU type constants # gpg: Signature made Fri 23 Oct 2015 07:27:56 BST using RSA key ID 20D9B392 # gpg: Good signature from "David Gibson <david@gibson.dropbear.id.au>" # gpg: aka "David Gibson (Red Hat) <dgibson@redhat.com>" # gpg: aka "David Gibson (ozlabs.org) <dgibson@ozlabs.org>" # 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: 75F4 6586 AE61 A66C C44E 87DC 6C38 CACA 20D9 B392 * remotes/dgibson/tags/ppc-next-20151023: (21 commits) prep: do not use CPU_LOG_IOPORT, convert to tracepoints openpic: add to misc category macio-nvram: add to misc category macio: add to bridge category uninorth: add to bridge category macio-ide: add to storage category cuda: add to bridge category grackle: add to bridge category escc: add to input category cmd646: add to storage category adb: add to input category ppc/spapr: Add "ibm,pa-features" property to the device-tree ppc: Add mmu_model defines for arch 2.03 and 2.07 hw/scsi/spapr_vscsi: Remove superfluous memset spapr_pci: Allow VFIO devices to work on the normal PCI host bridge spapr_iommu: Provide a function to switch a TCE table to allowing VFIO spapr_iommu: Rename vfio_accel parameter spapr_pci: Allow PCI host bridge DMA window to be configured spapr: Add "slb-size" property to CPU device tree nodes spapr: Abort when HTAB of requested size isn't allocated ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-10-23Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into stagingPeter Maydell1-24/+24
vhost: build fix Fix build breakages when using older gcc. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> # gpg: Signature made Thu 22 Oct 2015 20:36:07 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: vhost-user: fix up rhel6 build Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-10-23prep: do not use CPU_LOG_IOPORT, convert to tracepointsPaolo Bonzini1-27/+3
These messages are disabled by default; a perfect usecase for tracepoints. Convert them over. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2015-10-23openpic: add to misc categoryLaurent Vivier2-0/+2
openpic is a programmable interrupt controller, so add it to the misc category. Signed-off-by: Laurent Vivier <laurent@vivier.eu> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2015-10-23macio-nvram: add to misc categoryLaurent Vivier1-0/+1
The macio nvram is a non volatile RAM, so add it the misc category. Signed-off-by: Laurent Vivier <laurent@vivier.eu> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2015-10-23macio: add to bridge categoryLaurent Vivier1-0/+1
macio is a bridge between the PCI bus and the Mac nvram, IDE controller and PIC, so add it to the bridge category. Signed-off-by: Laurent Vivier <laurent@vivier.eu> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2015-10-23uninorth: add to bridge categoryLaurent Vivier1-0/+8
Uninorth is the mac99 PCI host controller, so add it to the bridge category. Signed-off-by: Laurent Vivier <laurent@vivier.eu> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2015-10-23macio-ide: add to storage categoryLaurent Vivier1-0/+1
macio-ide is an IDE controller, so add it to the storage category. Signed-off-by: Laurent Vivier <laurent@vivier.eu> Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2015-10-23cuda: add to bridge categoryLaurent Vivier1-0/+1
Cuda is a bridge between PowerMac system bus and the ADB controller, real-time clock, pram and the power management unit. So add it to the bridge category. Signed-off-by: Laurent Vivier <laurent@vivier.eu> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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