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* virtio: fix test build after uio.h changeMichael S. Tsirkin2018-12-191-0/+4
| | | | | Fixes: d38499530e5 ("fs: decouple READ and WRITE from the block layer ops") Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* tools/virtio: add kmalloc_array stubMichael S. Tsirkin2018-07-271-0/+5
| | | | | Fixes: 6da2ec56059 ("treewide: kmalloc() -> kmalloc_array()") Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* tools/virtio: add dma barrier stubsMichael S. Tsirkin2018-07-271-2/+2
| | | | | Fixes: 55e49dc43a8 ("virtio_ring: switch to dma_XX barriers for rpmsg") Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* sg: remove ->sg_magic memberJens Axboe2018-06-291-18/+0
| | | | | | | | | | | | This was introduced more than a decade ago when sg chaining was added, but we never really caught anything with it. The scatterlist entry size can be critical, since drivers allocate it, so remove the magic member. Recently it's been triggering allocation stalls and failures in NVMe. Tested-by: Jordan Glover <Golden_Miller83@protonmail.ch> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
* PCI: remove PCI_DMA_BUS_IS_PHYSChristoph Hellwig2018-05-071-2/+0
| | | | | | | | | | | This was used by the ide, scsi and networking code in the past to determine if they should bounce payloads. Now that the dma mapping always have to support dma to all physical memory (thanks to swiotlb for non-iommu systems) there is no need to this crude hack any more. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Palmer Dabbelt <palmer@sifive.com> (for riscv) Reviewed-by: Jens Axboe <axboe@kernel.dk>
* ptr_ring: fix buildMichael S. Tsirkin2018-03-201-0/+5
| | | | | | Fixes after recent use of kvmalloc Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhostLinus Torvalds2018-02-082-23/+31
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull virtio/vhost updates from Michael Tsirkin: "virtio, vhost: fixes, cleanups, features This includes the disk/cache memory stats for for the virtio balloon, as well as multiple fixes and cleanups" * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: vhost: don't hold onto file pointer for VHOST_SET_LOG_FD vhost: don't hold onto file pointer for VHOST_SET_VRING_ERR vhost: don't hold onto file pointer for VHOST_SET_VRING_CALL ringtest: ring.c malloc & memset to calloc virtio_vop: don't kfree device on register failure virtio_pci: don't kfree device on register failure virtio: split device_register into device_initialize and device_add vhost: remove unused lock check flag in vhost_dev_cleanup() vhost: Remove the unused variable. virtio_blk: print capacity at probe time virtio: make VIRTIO a menuconfig to ease disabling it all virtio/ringtest: virtio_ring: fix up need_event math virtio/ringtest: fix up need_event math virtio: virtio_mmio: make of_device_ids const. firmware: Use PTR_ERR_OR_ZERO() virtio-mmio: Use PTR_ERR_OR_ZERO() vhost/scsi: Improve a size determination in four functions virtio_balloon: include disk/file caches memory statistics
| * ringtest: ring.c malloc & memset to callocPeter Malone2018-02-011-4/+2
| | | | | | | | | | | | | | Code cleanup change - moving from malloc & memset to calloc. Signed-off-by: Peter Malone <peter.malone@gmail.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| * virtio/ringtest: virtio_ring: fix up need_event mathMichael S. Tsirkin2018-01-311-10/+14
| | | | | | | | | | | | | | | | | | | | last kicked event index must be updated unconditionally: even if we don't need to kick, we do not want to re-check the same entry for events. Reported-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Jens Freimann <jfreimann@redhat.com>
| * virtio/ringtest: fix up need_event mathMichael S. Tsirkin2018-01-311-9/+15
| | | | | | | | | | | | | | | | | | | | last kicked event index must be updated unconditionally: even if we don't need to kick, we do not want to re-check the same entry for events. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Cornelia Huck <cohuck@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com>
* | tools/virtio: fix smp_mb on x86Michael S. Tsirkin2018-01-291-1/+1
| | | | | | | | | | | | | | | | Offset 128 overlaps the last word of the redzone. Use 132 which is always beyond that. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | tools/virtio: copy READ/WRITE_ONCEMichael S. Tsirkin2018-01-291-0/+57
| | | | | | | | | | | | | | This is to make ptr_ring test build again. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | tools/virtio: more stubs to fix tools buildMichael S. Tsirkin2018-01-292-1/+2
| | | | | | | | | | Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | tools/virtio: switch to __ptr_ring_emptyMichael S. Tsirkin2018-01-291-1/+1
|/ | | | | | | | We don't rely on lockless guarantees, but it seems cleaner than inverting __ptr_ring_peek. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhostLinus Torvalds2017-12-151-6/+23
|\ | | | | | | | | | | | | | | | | Pull virtio regression fixes from Michael Tsirkin: "Fixes two issues in the latest kernel" * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: virtio_mmio: fix devm cleanup ptr_ring: fix up after recent ptr_ring changes
| * ptr_ring: fix up after recent ptr_ring changesMichael S. Tsirkin2017-12-081-6/+23
| | | | | | | | | | | | | | Add more stubs to make it build. Fixes: 81fbfe8a ("ptr_ring: use kmalloc_array()") Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* | locking/x86: Use LOCK ADD for smp_mb() instead of MFENCEMichael S. Tsirkin2017-11-101-0/+4
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | MFENCE appears to be way slower than a locked instruction - let's use LOCK ADD unconditionally, as we always did on old 32-bit. Performance testing results: perf stat -r 10 -- ./virtio_ring_0_9 --sleep --host-affinity 0 --guest-affinity 0 Before: 0.922565990 seconds time elapsed ( +- 1.15% ) After: 0.578667024 seconds time elapsed ( +- 1.21% ) i.e. about ~60% faster. Just poking at SP would be the most natural, but if we then read the value from SP, we get a false dependency which will slow us down. This was noted in this article: http://shipilev.net/blog/2014/on-the-fence-with-dependencies/ And is easy to reproduce by sticking a barrier in a small non-inline function. So let's use a negative offset - which avoids this problem since we build with the red zone disabled. For userspace, use an address just below the redzone. The one difference between LOCK ADD and MFENCE is that LOCK ADD does not affect CLFLUSH, previous patches converted all uses of CLFLUSH to call mb(), such that changes to smp_mb() won't affect it. Update mb/rmb/wmb() on 32-bit to use the negative offset, too, for consistency. As a follow-up, it might be worth considering switching users of CLFLUSH to another API (e.g. clflush_mb()?) - we will then be able to convert mb() to smp_mb() again. Also arguably, GCC should switch to use LOCK ADD for __sync_synchronize(). This might be worth pursuing separately. Suggested-by: Andy Lutomirski <luto@amacapital.net> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: qemu-devel@nongnu.org Cc: virtualization@lists.linux-foundation.org Link: http://lkml.kernel.org/r/1509118355-4890-1-git-send-email-mst@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* License cleanup: add SPDX GPL-2.0 license identifier to files with no licenseGreg Kroah-Hartman2017-11-0223-0/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* tools/virtio: fix spelling mistake: "wakeus" -> "wakeups"Colin Ian King2017-05-091-1/+1
| | | | | | | | trivial fix to spelling mistake in an error message. Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com>
* ptr_ring: support testing different batching sizesMichael S. Tsirkin2017-05-091-0/+3
| | | | | | Use the param flag for that. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* ringtest: support test specific parametersMichael S. Tsirkin2017-05-092-0/+15
| | | | | | Add a new flag for passing test-specific parameters. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* tools/virtio: fix build breakageSekhar Nori2017-05-023-4/+6
| | | | | | | | | | | | | | | | | | | | Previous commit ("virtio: add context flag to find vqs") added a new 'context' flag to vring_new_virtqueue(), but the corresponding API in tools/virtio/ is not updated causing build errors due to conflicting declarations. Bring code in tools/virtio in sync with that in kernel. I have used 'false' for the value of the new boolean 'context' flag as that seems to be the best way to preserve existing behavior. Tested with: $ make -C tools/virtio clean all ARCH=x86 Signed-off-by: Sekhar Nori <nsekhar@ti.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* ringtest: fix an assert statementDan Carpenter2017-05-021-1/+1
| | | | | | | | There is an || vs && typo so the assert can never be triggered. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com>
* tools/virtio/ringtest: tweaks for s390Halil Pasic2017-01-191-0/+12
| | | | | | | | Make ringtest work on s390 too. Signed-off-by: Halil Pasic <pasic@linux.vnet.ibm.com> Acked-by: Sascha Silbe <silbe@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
* tools/virtio/ringtest: fix run-on-all.sh for offline cpusHalil Pasic2017-01-191-2/+3
| | | | | | | | | | | | | | | | | Since ef1b144d ("tools/virtio/ringtest: fix run-on-all.sh to work without /dev/cpu") run-on-all.sh uses seq 0 $HOST_AFFINITY as the list of ids of the CPUs to run the command on (assuming ids of online CPUs are consecutive and start from 0), where $HOST_AFFINITY is the highest CPU id in the system previously determined using lscpu. This can fail on systems with offline CPUs. Instead let's use lscpu to determine the list of online CPUs. Signed-off-by: Halil Pasic <pasic@linux.vnet.ibm.com> Fixes: ef1b144d ("tools/virtio/ringtest: fix run-on-all.sh to work without /dev/cpu") Reviewed-by: Sascha Silbe <silbe@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
* tools/virtio: use {READ,WRITE}_ONCE() in uaccess.hMark Rutland2016-12-161-4/+5
| | | | | | | | | | | | | | | | As a step towards killing off ACCESS_ONCE, use {READ,WRITE}_ONCE() for the virtio tools uaccess primitives, pulling these in from <linux/compiler.h>. With this done, we can kill off the now-unused ACCESS_ONCE() definition. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: linux-kernel@vger.kernel.org Cc: virtualization@lists.linux-foundation.org Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Jason Wang <jasowang@redhat.com>
* tools/virtio: fix READ_ONCE()Mark Rutland2016-12-161-1/+1
| | | | | | | | | | | | | | | | | | The virtio tools implementation of READ_ONCE() has a single parameter called 'var', but erroneously refers to 'val' for its cast, and thus won't work unless there's a variable of the correct type that happens to be called 'var'. Fix this with s/var/val/, making READ_ONCE() work as expected regardless. Fixes: a7c490333df3cff5 ("tools/virtio: use virt_xxx barriers") Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: linux-kernel@vger.kernel.org Cc: virtualization@lists.linux-foundation.org Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Jason Wang <jasowang@redhat.com>
* ringtest: poll for new buffers once before updating event indexPaolo Bonzini2016-10-311-2/+2
| | | | | | | | | | | | | | Updating the event index has a memory barrier and causes more work on the other side to actually signal the event. It is unnecessary if a new buffer has already appeared on the ring, so poll once before doing the update. The effect of this on the 0.9 ring implementation is pretty much invisible, but on the new-style ring it provides a consistent 3% performance improvement. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* ringtest: commonize implementation of poll_avail/poll_usedPaolo Bonzini2016-10-316-83/+43
| | | | | | | | Provide new primitives used_empty/avail_empty and build poll_avail/poll_used on top of it. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* ringtest: use link-time optimizationPaolo Bonzini2016-10-312-4/+4
| | | | | | | | | By using -flto and -fwhole-program, all functions from the ring implementation can be treated as static and possibly inlined. Force this to happen through the GCC flatten attribute. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* tools/virtio: add dma stubsMichael S. Tsirkin2016-08-155-1/+52
| | | | | | | Fixes build after recent IOMMU-related changes, mustly by adding more stubs. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* ringtest: test build fixMichael S. Tsirkin2016-08-151-0/+1
| | | | | | | | | Recent changes to ptr_ring broke the ringtest which lacks a likely() stub. Fix it up. Fixes: 982fb490c298896d15e9323a882f34a57c11ff56 ("ptr_ring: support zero length ring") Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* ptr_ring: support resizing multiple queuesMichael S. Tsirkin2016-07-011-0/+5
| | | | | | | | | | Sometimes, we need support resizing multiple queues at once. This is because it was not easy to recover to recover from a partial failure of multiple queues resizing. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2016-06-304-3/+78
|\ | | | | | | | | | | | | | | Several cases of overlapping changes, except the packet scheduler conflicts which deal with the addition of the free list parameter to qdisc_enqueue(). Signed-off-by: David S. Miller <davem@davemloft.net>
| * tools/virtio: add noring toolMichael S. Tsirkin2016-06-062-1/+72
| | | | | | | | | | | | Useful to measure testing framework overhead. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| * tools/virtio/ringtest: fix run-on-all.sh to work without /dev/cpuMike Rapoport2016-06-061-2/+2
| | | | | | | | | | | | | | | | /dev/cpu is only available on x86 with certain modules (e.g. msr) enabled. Using lscpu to get processors count is more portable. Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| * tools/virtio/ringtest: add usage example to READMEMike Rapoport2016-06-061-0/+4
| | | | | | | | | | | | | | | | Having typical usage example in the README file is more convinient than in the git history... Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* | ptr_ring: ring testMichael S. Tsirkin2016-06-152-1/+196
|/ | | | | | | Add ringtest based unit test for ptr ring. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ringtest: pass buf != NULLMichael S. Tsirkin2016-05-221-1/+1
| | | | | | just a stub pointer for now. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* virtio: add inorder optionMichael S. Tsirkin2016-05-223-2/+54
| | | | | | skips ring accesses but drops out of order support Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* virtio_ring: Support DMA APIsAndy Lutomirski2016-03-021-0/+17
| | | | | | | | | | | | | | | | | virtio_ring currently sends the device (usually a hypervisor) physical addresses of its I/O buffers. This is okay when DMA addresses and physical addresses are the same thing, but this isn't always the case. For example, this never works on Xen guests, and it is likely to fail if a physical "virtio" device ever ends up behind an IOMMU or swiotlb. The immediate use case for me is to enable virtio on Xen guests. For that to work, we need vring to support DMA address translation as well as a corresponding change to virtio_pci or to another driver. Signed-off-by: Andy Lutomirski <luto@kernel.org> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* tools/virtio: add ringtest utilitiesMichael S. Tsirkin2016-01-268-0/+1123
| | | | | | | | | | | | | | | | | | | This adds micro-benchmarks useful for tuning virtio ring layouts. Three layouts are currently implemented: - virtio 0.9 compatible one - an experimental extension bypassing the ring index, polling ring itself instead - an experimental extension bypassing avail and used ring completely Typical use: sh run-on-all.sh perf stat -r 10 --log-fd 1 -- ./ring It doesn't depend on the kernel directly, but it's handy to have as much virtio stuff as possible in one tree. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* tools/virtio: use virt_xxx barriersMichael S. Tsirkin2016-01-263-9/+23
| | | | | | | Fix build after API changes. Reported-by: Kamal Mostafa <kamal@canonical.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* tools/virtio: fix byteswap logicMichael S. Tsirkin2015-12-071-7/+13
| | | | | | | | | | | | | commit cf561f0d2eb74574ad9985a2feab134267a9d298 ("virtio: introduce virtio_is_little_endian() helper") changed byteswap logic to skip feature bit checks for LE platforms, but didn't update tools/virtio, so vring_bench started failing. Update the copy under tools/virtio/ (TODO: find a way to avoid this code duplication). Cc: Greg Kurz <gkurz@linux.vnet.ibm.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* tools/virtio: move list macro stubsMichael S. Tsirkin2015-12-072-6/+6
| | | | | | Makes them more generally available. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* tools/virtio: propagate V=X to kernel buildMichael S. Tsirkin2015-09-161-1/+1
| | | | Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* tools/virtio: fix build after 4.2 changesMichael S. Tsirkin2015-09-093-0/+13
| | | | | | more stubs, mostly Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* tools/virtio: add virtio 1.0 in vringh_testMichael S. Tsirkin2014-12-151-0/+2
| | | | Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* tools/virtio: add virtio 1.0 in virtio_testMichael S. Tsirkin2014-12-151-1/+13
| | | | Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* tools/virtio: enable -WerrorMichael S. Tsirkin2014-12-151-1/+1
| | | | | | Seems to mostly be a positive. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-27 14:54:31 +0000