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[RFC PATCH net-next v8 00/14] Device Memory TCP

by Mina Almasry

RFC v8: ======= Major Changes: -------------- - Fixed build error generated by patch-by-patch build. - Applied docs suggestions from Randy. RFC v7: ======= Major Changes: -------------- This revision largely rebases on top of net-next and addresses the feedback RFCv6 received from folks, namely Jakub, Yunsheng, Arnd, David, & Pavel. The series remains in RFC because the queue-API ndos defined in this series are not yet implemented. I have a GVE implementation I carry out of tree for my testing. A upstreamable GVE implementation is in the works. Aside from that, in my estimation all the patches are ready for review/merge. Please do take a look. As usual the full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v7/ Detailed changelog: - Use admin-perm in netlink API. - Addressed feedback from Jakub with regards to netlink API implementation. - Renamed devmem.c functions to something more appropriate for that file. - Improve the performance seen through the page_pool benchmark. - Fix the value definition of all the SO_DEVMEM_* uapi. - Various fixes to documentation. Perf - page-pool benchmark: --------------------------- Improved performance of bench_page_pool_simple.ko tests compared to v6: https://pastebin.com/raw/v5dYRg8L net-next base: 8 cycle fast path. RFC v6: 10 cycle fast path. RFC v7: 9 cycle fast path. RFC v7 with CONFIG_DMA_SHARED_BUFFER disabled: 8 cycle fast path, same as baseline. Perf - Devmem TCP benchmark: --------------------- Perf is about the same regardless of the changes in v7, namely the removal of the static_branch_unlikely to improve the page_pool benchmark performance: 189/200gbps bi-directional throughput with RX devmem TCP and regular TCP TX i.e. ~95% line rate. RFC v6: ======= Major Changes: -------------- This revision largely rebases on top of net-next and addresses the little feedback RFCv5 received. The series remains in RFC because the queue-API ndos defined in this series are not yet implemented. I have a GVE implementation I carry out of tree for my testing. A upstreamable GVE implementation is in the works. Aside from that, in my estimation all the patches are ready for review/merge. Please do take a look. As usual the full devmem TCP changes including the full GVE driver implementation is here: https://github.com/mina/linux/commits/tcpdevmem-v6/ This version also comes with some performance data recorded in the cover letter (see below changelog). Detailed changelog: - Rebased on top of the merged netmem_ref changes. - Converted skb->dmabuf to skb->readable (Pavel). Pavel's original suggestion was to remove the skb->dmabuf flag entirely, but when I looked into it closely, I found the issue that if we remove the flag we have to dereference the shinfo(skb) pointer to obtain the first frag to tell whether an skb is readable or not. This can cause a performance regression if it dirties the cache line when the shinfo(skb) was not really needed. Instead, I converted the skb->dmabuf flag into a generic skb->readable flag which can be re-used by io_uring 0-copy RX. - Squashed a few locking optimizations from Eric Dumazet in the RX path and the DEVMEM_DONTNEED setsockopt. - Expanded the tests a bit. Added validation for invalid scenarios and added some more coverage. Perf - page-pool benchmark: --------------------------- bench_page_pool_simple.ko tests with and without these changes: https://pastebin.com/raw/ncHDwAbn AFAIK the number that really matters in the perf tests is the 'tasklet_page_pool01_fast_path Per elem'. This one measures at about 8 cycles without the changes but there is some 1 cycle noise in some results. With the patches this regresses to 9 cycles with the changes but there is 1 cycle noise occasionally running this test repeatedly. Lastly I tried disable the static_branch_unlikely() in netmem_is_net_iov() check. To my surprise disabling the static_branch_unlikely() check reduces the fast path back to 8 cycles, but the 1 cycle noise remains. Perf - Devmem TCP benchmark: --------------------- 189/200gbps bi-directional throughput with RX devmem TCP and regular TCP TX i.e. ~95% line rate. Major changes in RFC v5: ======================== 1. Rebased on top of 'Abstract page from net stack' series and used the new netmem type to refer to LSB set pointers instead of re-using struct page. 2. Downgraded this series back to RFC and called it RFC v5. This is because this series is now dependent on 'Abstract page from net stack'[1] and the queue API. Both are removed from the series to reduce the patch # and those bits are fairly independent or pre-requisite work. 3. Reworked the page_pool devmem support to use netmem and for some more unified handling. 4. Reworked the reference counting of net_iov (renamed from page_pool_iov) to use pp_ref_count for refcounting. The full changes including the dependent series and GVE page pool support is here: https://github.com/mina/linux/commits/tcpdevmem-rfcv5/ [1] https://patchwork.kernel.org/project/netdevbpf/list/?series=810774 Major changes in v1: ==================== 1. Implemented MVP queue API ndos to remove the userspace-visible driver reset. 2. Fixed issues in the napi_pp_put_page() devmem frag unref path. 3. Removed RFC tag. Many smaller addressed comments across all the patches (patches have individual change log). Full tree including the rest of the GVE driver changes: https://github.com/mina/linux/commits/tcpdevmem-v1 Changes in RFC v3: ================== 1. Pulled in the memory-provider dependency from Jakub's RFC[1] to make the series reviewable and mergeable. 2. Implemented multi-rx-queue binding which was a todo in v2. 3. Fix to cmsg handling. The sticking point in RFC v2[2] was the device reset required to refill the device rx-queues after the dmabuf bind/unbind. The solution suggested as I understand is a subset of the per-queue management ops Jakub suggested or similar: https://lore.kernel.org/netdev/20230815171638.4c057dcd@kernel.org/ This is not addressed in this revision, because: 1. This point was discussed at netconf & netdev and there is openness to using the current approach of requiring a device reset. 2. Implementing individual queue resetting seems to be difficult for my test bed with GVE. My prototype to test this ran into issues with the rx-queues not coming back up properly if reset individually. At the moment I'm unsure if it's a mistake in the POC or a genuine issue in the virtualization stack behind GVE, which currently doesn't test individual rx-queue restart. 3. Our usecases are not bothered by requiring a device reset to refill the buffer queues, and we'd like to support NICs that run into this limitation with resetting individual queues. My thought is that drivers that have trouble with per-queue configs can use the support in this series, while drivers that support new netdev ops to reset individual queues can automatically reset the queue as part of the dma-buf bind/unbind. The same approach with device resets is presented again for consideration with other sticking points addressed. This proposal includes the rx devmem path only proposed for merge. For a snapshot of my entire tree which includes the GVE POC page pool support & device memory support: https://github.com/torvalds/linux/compare/master...mina:linux:tcpdevmem-v3 [1] https://lore.kernel.org/netdev/f8270765-a27b-6ccf-33ea-cda097168d79@redhat.… [2] https://lore.kernel.org/netdev/CAHS8izOVJGJH5WF68OsRWFKJid1_huzzUK+hpKbLcL4… Changes in RFC v2: ================== The sticking point in RFC v1[1] was the dma-buf pages approach we used to deliver the device memory to the TCP stack. RFC v2 is a proof-of-concept that attempts to resolve this by implementing scatterlist support in the networking stack, such that we can import the dma-buf scatterlist directly. This is the approach proposed at a high level here[2]. Detailed changes: 1. Replaced dma-buf pages approach with importing scatterlist into the page pool. 2. Replace the dma-buf pages centric API with a netlink API. 3. Removed the TX path implementation - there is no issue with implementing the TX path with scatterlist approach, but leaving out the TX path makes it easier to review. 4. Functionality is tested with this proposal, but I have not conducted perf testing yet. I'm not sure there are regressions, but I removed perf claims from the cover letter until they can be re-confirmed. 5. Added Signed-off-by: contributors to the implementation. 6. Fixed some bugs with the RX path since RFC v1. Any feedback welcome, but specifically the biggest pending questions needing feedback IMO are: 1. Feedback on the scatterlist-based approach in general. 2. Netlink API (Patch 1 & 2). 3. Approach to handle all the drivers that expect to receive pages from the page pool (Patch 6). [1] https://lore.kernel.org/netdev/dfe4bae7-13a0-3c5d-d671-f61b375cb0b4@gmail.c… [2] https://lore.kernel.org/netdev/CAHS8izPm6XRS54LdCDZVd0C75tA1zHSu6jLVO8nzTLX… ================== * TL;DR: Device memory TCP (devmem TCP) is a proposal for transferring data to and/or from device memory efficiently, without bouncing the data to a host memory buffer. * Problem: A large amount of data transfers have device memory as the source and/or destination. Accelerators drastically increased the volume of such transfers. Some examples include: - ML accelerators transferring large amounts of training data from storage into GPU/TPU memory. In some cases ML training setup time can be as long as 50% of TPU compute time, improving data transfer throughput & efficiency can help improving GPU/TPU utilization. - Distributed training, where ML accelerators, such as GPUs on different hosts, exchange data among them. - Distributed raw block storage applications transfer large amounts of data with remote SSDs, much of this data does not require host processing. Today, the majority of the Device-to-Device data transfers the network are implemented as the following low level operations: Device-to-Host copy, Host-to-Host network transfer, and Host-to-Device copy. The implementation is suboptimal, especially for bulk data transfers, and can put significant strains on system resources, such as host memory bandwidth, PCIe bandwidth, etc. One important reason behind the current state is the kernel’s lack of semantics to express device to network transfers. * Proposal: In this patch series we attempt to optimize this use case by implementing socket APIs that enable the user to: 1. send device memory across the network directly, and 2. receive incoming network packets directly into device memory. Packet _payloads_ go directly from the NIC to device memory for receive and from device memory to NIC for transmit. Packet _headers_ go to/from host memory and are processed by the TCP/IP stack normally. The NIC _must_ support header split to achieve this. Advantages: - Alleviate host memory bandwidth pressure, compared to existing network-transfer + device-copy semantics. - Alleviate PCIe BW pressure, by limiting data transfer to the lowest level of the PCIe tree, compared to traditional path which sends data through the root complex. * Patch overview: ** Part 1: netlink API Gives user ability to bind dma-buf to an RX queue. ** Part 2: scatterlist support Currently the standard for device memory sharing is DMABUF, which doesn't generate struct pages. On the other hand, networking stack (skbs, drivers, and page pool) operate on pages. We have 2 options: 1. Generate struct pages for dmabuf device memory, or, 2. Modify the networking stack to process scatterlist. Approach #1 was attempted in RFC v1. RFC v2 implements approach #2. ** part 3: page pool support We piggy back on page pool memory providers proposal: https://github.com/kuba-moo/linux/tree/pp-providers It allows the page pool to define a memory provider that provides the page allocation and freeing. It helps abstract most of the device memory TCP changes from the driver. ** part 4: support for unreadable skb frags Page pool iovs are not accessible by the host; we implement changes throughput the networking stack to correctly handle skbs with unreadable frags. ** Part 5: recvmsg() APIs We define user APIs for the user to send and receive device memory. Not included with this series is the GVE devmem TCP support, just to simplify the review. Code available here if desired: https://github.com/mina/linux/tree/tcpdevmem This series is built on top of net-next with Jakub's pp-providers changes cherry-picked. * NIC dependencies: 1. (strict) Devmem TCP require the NIC to support header split, i.e. the capability to split incoming packets into a header + payload and to put each into a separate buffer. Devmem TCP works by using device memory for the packet payload, and host memory for the packet headers. 2. (optional) Devmem TCP works better with flow steering support & RSS support, i.e. the NIC's ability to steer flows into certain rx queues. This allows the sysadmin to enable devmem TCP on a subset of the rx queues, and steer devmem TCP traffic onto these queues and non devmem TCP elsewhere. The NIC I have access to with these properties is the GVE with DQO support running in Google Cloud, but any NIC that supports these features would suffice. I may be able to help reviewers bring up devmem TCP on their NICs. * Testing: The series includes a udmabuf kselftest that show a simple use case of devmem TCP and validates the entire data path end to end without a dependency on a specific dmabuf provider. ** Test Setup Kernel: net-next with this series and memory provider API cherry-picked locally. Hardware: Google Cloud A3 VMs. NIC: GVE with header split & RSS & flow steering support. Cc: Pavel Begunkov <asml.silence(a)gmail.com> Cc: David Wei <dw(a)davidwei.uk> Cc: Jason Gunthorpe <jgg(a)ziepe.ca> Cc: Yunsheng Lin <linyunsheng(a)huawei.com> Cc: Shailend Chand <shailend(a)google.com> Cc: Harshitha Ramamurthy <hramamurthy(a)google.com> Cc: Shakeel Butt <shakeel.butt(a)linux.dev> Cc: Jeroen de Borst <jeroendb(a)google.com> Cc: Praveen Kaligineedi <pkaligineedi(a)google.com> Jakub Kicinski (1): net: page_pool: create hooks for custom page providers Mina Almasry (13): queue_api: define queue api net: netdev netlink api to bind dma-buf to a net device netdev: support binding dma-buf to netdevice netdev: netdevice devmem allocator page_pool: convert to use netmem page_pool: devmem support memory-provider: dmabuf devmem memory provider net: support non paged skb frags net: add support for skbs with unreadable frags tcp: RX path for devmem TCP net: add SO_DEVMEM_DONTNEED setsockopt to release RX frags net: add devmem TCP documentation selftests: add ncdevmem, netcat for devmem TCP Documentation/netlink/specs/netdev.yaml | 57 +++ Documentation/networking/devmem.rst | 256 +++++++++++ Documentation/networking/index.rst | 1 + arch/alpha/include/uapi/asm/socket.h | 6 + arch/mips/include/uapi/asm/socket.h | 6 + arch/parisc/include/uapi/asm/socket.h | 6 + arch/sparc/include/uapi/asm/socket.h | 6 + include/linux/netdevice.h | 3 + include/linux/skbuff.h | 73 +++- include/linux/socket.h | 1 + include/net/devmem.h | 124 ++++++ include/net/netdev_queues.h | 27 ++ include/net/netdev_rx_queue.h | 2 + include/net/netmem.h | 234 +++++++++- include/net/page_pool/helpers.h | 155 +++++-- include/net/page_pool/types.h | 33 +- include/net/sock.h | 2 + include/net/tcp.h | 5 +- include/trace/events/page_pool.h | 29 +- include/uapi/asm-generic/socket.h | 6 + include/uapi/linux/netdev.h | 19 + include/uapi/linux/uio.h | 17 + net/bpf/test_run.c | 5 +- net/core/Makefile | 2 +- net/core/datagram.c | 6 + net/core/dev.c | 6 +- net/core/devmem.c | 425 ++++++++++++++++++ net/core/gro.c | 8 +- net/core/netdev-genl-gen.c | 23 + net/core/netdev-genl-gen.h | 6 + net/core/netdev-genl.c | 107 +++++ net/core/page_pool.c | 364 +++++++++------- net/core/skbuff.c | 110 ++++- net/core/sock.c | 61 +++ net/ipv4/esp4.c | 2 +- net/ipv4/tcp.c | 254 ++++++++++- net/ipv4/tcp_input.c | 13 +- net/ipv4/tcp_ipv4.c | 9 + net/ipv4/tcp_minisocks.c | 2 + net/ipv4/tcp_output.c | 5 +- net/ipv6/esp6.c | 2 +- net/packet/af_packet.c | 4 +- tools/include/uapi/linux/netdev.h | 19 + tools/testing/selftests/net/.gitignore | 1 + tools/testing/selftests/net/Makefile | 5 + tools/testing/selftests/net/ncdevmem.c | 546 ++++++++++++++++++++++++ 46 files changed, 2776 insertions(+), 277 deletions(-) create mode 100644 Documentation/networking/devmem.rst create mode 100644 include/net/devmem.h create mode 100644 net/core/devmem.c create mode 100644 tools/testing/selftests/net/ncdevmem.c -- 2.44.0.478.gd926399ef9-goog

15 hours, 2 minutes

4
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[PATCH] selftests/nolibc: disable brk()/sbrk() tests on musl

by Thomas Weißschuh

On musl calls to brk() and sbrk() always fail with ENOMEM. Detect this and skip the tests on musl. Tested on glibc 2.39 and musl 1.2.5 in addition to nolibc. Signed-off-by: Thomas Weißschuh <linux(a)weissschuh.net> --- tools/testing/selftests/nolibc/nolibc-test.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c index 94bb6e11c16f..89be9ba95179 100644 --- a/tools/testing/selftests/nolibc/nolibc-test.c +++ b/tools/testing/selftests/nolibc/nolibc-test.c @@ -942,6 +942,7 @@ int run_syscall(int min, int max) int ret = 0; void *p1, *p2; int has_gettid = 1; + int has_brk; /* <proc> indicates whether or not /proc is mounted */ proc = stat("/proc", &stat_buf) == 0; @@ -954,6 +955,9 @@ int run_syscall(int min, int max) has_gettid = __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 30); #endif + /* on musl setting brk()/sbrk() always fails */ + has_brk = brk(0) == 0; + for (test = min; test >= 0 && test <= max; test++) { int llen = 0; /* line length */ @@ -969,9 +973,9 @@ int run_syscall(int min, int max) CASE_TEST(kill_0); EXPECT_SYSZR(1, kill(getpid(), 0)); break; CASE_TEST(kill_CONT); EXPECT_SYSZR(1, kill(getpid(), 0)); break; CASE_TEST(kill_BADPID); EXPECT_SYSER(1, kill(INT_MAX, 0), -1, ESRCH); break; - CASE_TEST(sbrk_0); EXPECT_PTRNE(1, sbrk(0), (void *)-1); break; - CASE_TEST(sbrk); if ((p1 = p2 = sbrk(4096)) != (void *)-1) p2 = sbrk(-4096); EXPECT_SYSZR(1, (p2 == (void *)-1) || p2 == p1); break; - CASE_TEST(brk); EXPECT_SYSZR(1, brk(sbrk(0))); break; + CASE_TEST(sbrk_0); EXPECT_PTRNE(has_brk, sbrk(0), (void *)-1); break; + CASE_TEST(sbrk); if ((p1 = p2 = sbrk(4096)) != (void *)-1) p2 = sbrk(-4096); EXPECT_SYSZR(has_brk, (p2 == (void *)-1) || p2 == p1); break; + CASE_TEST(brk); EXPECT_SYSZR(has_brk, brk(sbrk(0))); break; CASE_TEST(chdir_root); EXPECT_SYSZR(1, chdir("/")); chdir(getenv("PWD")); break; CASE_TEST(chdir_dot); EXPECT_SYSZR(1, chdir(".")); break; CASE_TEST(chdir_blah); EXPECT_SYSER(1, chdir("/blah"), -1, ENOENT); break; --- base-commit: 0adab2b6b7336fb6ee3c6456a432dad3b1d25647 change-id: 20240423-nolibc-musl-brk-7784add29801 Best regards, -- Thomas Weißschuh <linux(a)weissschuh.net>

15 hours, 11 minutes

2
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[PATCH net-next v5 0/7] selftests: drv-net: support testing with a remote system

by Jakub Kicinski

Hi! Implement support for tests which require access to a remote system / endpoint which can generate traffic. This series concludes the "groundwork" for upstream driver tests. I wanted to support the three models which came up in discussions: - SW testing with netdevsim - "local" testing with two ports on the same system in a loopback - "remote" testing via SSH so there is a tiny bit of an abstraction which wraps up how "remote" commands are executed. Otherwise hopefully there's nothing surprising. I'm only adding a ping test. I had a bigger one written but I was worried we'll get into discussing the details of the test itself and how I chose to hack up netdevsim, instead of the test infra... So that test will be a follow up :) v5: - fix rand port generation, and wrap it in a helper in case the random thing proves to be flaky - reuseaddr - explicitly select the address family v4: https://lore.kernel.org/all/20240418233844.2762396-1-kuba@kernel.org - improve coding style of patch 5 - switch from netcat to socat (patch 6) - support exit_wait for bkg() in context manager - add require_XYZ() helpers (patch 7) - increase timeouts a little (1,3 -> 5 sec) v3: https://lore.kernel.org/all/20240417231146.2435572-1-kuba@kernel.org - first two patches are new - make Remote::cmd() return Popen() object (patch 3) - always operate on absolute paths (patch 3) - last two patches are new v2: https://lore.kernel.org/all/20240416004556.1618804-1-kuba@kernel.org - rename endpoint -> remote - use 2001:db8:: v6 prefix - add a note about persistent SSH connections - add the kernel config v1: https://lore.kernel.org/all/20240412233705.1066444-1-kuba@kernel.org Jakub Kicinski (7): selftests: drv-net: define endpoint structures selftests: drv-net: factor out parsing of the env selftests: drv-net: construct environment for running tests which require an endpoint selftests: drv-net: add a trivial ping test selftests: net: support matching cases by name prefix selftests: drv-net: add a TCP ping test case (and useful helpers) selftests: drv-net: add require_XYZ() helpers for validating env tools/testing/selftests/drivers/net/Makefile | 5 +- .../testing/selftests/drivers/net/README.rst | 33 ++++ .../selftests/drivers/net/lib/py/__init__.py | 1 + .../selftests/drivers/net/lib/py/env.py | 175 ++++++++++++++++-- .../selftests/drivers/net/lib/py/remote.py | 15 ++ .../drivers/net/lib/py/remote_netns.py | 21 +++ .../drivers/net/lib/py/remote_ssh.py | 39 ++++ tools/testing/selftests/drivers/net/ping.py | 51 +++++ .../testing/selftests/net/lib/py/__init__.py | 1 + tools/testing/selftests/net/lib/py/ksft.py | 13 +- tools/testing/selftests/net/lib/py/netns.py | 31 ++++ tools/testing/selftests/net/lib/py/utils.py | 60 +++++- 12 files changed, 416 insertions(+), 29 deletions(-) create mode 100644 tools/testing/selftests/drivers/net/lib/py/remote.py create mode 100644 tools/testing/selftests/drivers/net/lib/py/remote_netns.py create mode 100644 tools/testing/selftests/drivers/net/lib/py/remote_ssh.py create mode 100755 tools/testing/selftests/drivers/net/ping.py create mode 100644 tools/testing/selftests/net/lib/py/netns.py -- 2.44.0

16 hours, 14 minutes

3
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[PATCH bpf-next v2 0/5] use network helpers, part 2

by Geliang Tang

From: Geliang Tang <tanggeliang(a)kylinos.cn> This patchset uses more network helpers in test_sock_addr.c, but first of all, patch 2 is needed to make network_helpers.c independent of test_progs.c. Then network_helpers.h can be included into test_sock_addr.c without compile errors. Patch 1 and patch 2 address Martin's comments for the previous series too. v2: - Only a few minor cleanups to patch 5. Geliang Tang (5): selftests/bpf: Fix a fd leak in error paths in open_netns selftests/bpf: Use log_err in open_netns/close_netns selftests/bpf: Use start_server_addr in test_sock_addr selftests/bpf: Use connect_to_addr in test_sock_addr selftests/bpf: Use make_sockaddr in test_sock_addr tools/testing/selftests/bpf/Makefile | 3 +- tools/testing/selftests/bpf/network_helpers.c | 20 ++- tools/testing/selftests/bpf/network_helpers.h | 1 + .../selftests/bpf/prog_tests/empty_skb.c | 2 + .../bpf/prog_tests/ip_check_defrag.c | 2 + .../selftests/bpf/prog_tests/tc_redirect.c | 2 +- .../selftests/bpf/prog_tests/test_tunnel.c | 4 + .../selftests/bpf/prog_tests/xdp_metadata.c | 16 ++ tools/testing/selftests/bpf/test_sock_addr.c | 138 +++--------------- 9 files changed, 63 insertions(+), 125 deletions(-) -- 2.40.1

16 hours, 53 minutes

2
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[PATCH 0/6] Add initial GHCB support for SEV-ES selftests

by Peter Gonda

Adding GHCB support for selftests. Very similar code to the ucall functionality, I didn't refactor anything common out since I was unsure with just two instances that is required. If pulling out common code between those two is preferred please let me know. The series only adds a single usage of the GHCB which is a special outsb GHCB exit to allow for passing the 64-bit ucall pointer. In future series we can test more GHCB functionality of KVM. I'd like to base some SNP smoke tests off of this and the current SEV selftest work. base-commit: 40e09b3ccfacc640d58e1e3d6b8f29b2db0a9848 Cc: Vishal Annapurve <vannapurve(a)google.com> Cc: Ackerley Tng <ackerleytng(a)google.com> Cc: Paolo Bonzini <pbonzini(a)redhat.com> Cc: Claudio Imbrenda <imbrenda(a)linux.ibm.com> Cc: Sean Christopherson <seanjc(a)google.com> Cc: Carlos Bilbao <carlos.bilbao(a)amd.com> Cc: Tom Lendacky <thomas.lendacky(a)amd.com> Cc: Michael Roth <michael.roth(a)amd.com> Cc: kvm(a)vger.kernel.org Cc: linux-kselftest(a)vger.kernel.org Signed-off-by: Peter Gonda <pgonda(a)google.com> Peter Gonda (6): Add GHCB with setters and getters Add arch specific additional guest pages Add vm_vaddr_alloc_pages_shared() Add GHCB allocations and helpers Add is_sev_enabled() helpers Add ability for SEV-ES guests to use ucalls via GHCB tools/testing/selftests/kvm/Makefile | 2 +- .../selftests/kvm/include/kvm_util_base.h | 4 + .../selftests/kvm/include/x86_64/sev.h | 7 + .../selftests/kvm/include/x86_64/svm.h | 106 +++++++++++++ tools/testing/selftests/kvm/lib/kvm_util.c | 22 ++- .../selftests/kvm/lib/x86_64/processor.c | 8 + tools/testing/selftests/kvm/lib/x86_64/sev.c | 149 ++++++++++++++++++ .../testing/selftests/kvm/lib/x86_64/ucall.c | 17 ++ .../selftests/kvm/x86_64/sev_smoke_test.c | 22 +-- 9 files changed, 313 insertions(+), 24 deletions(-) -- 2.44.0.478.gd926399ef9-goog

17 hours

2
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[PATCH v4 0/9] Support Zve32[xf] and Zve64[xfd] Vector subextensions

by Andy Chiu

The series composes of two parts. The first part provides a quick fix for the issue on a recent thread[1]. The issue happens when a platform has ununified vector register length across multiple cores. Specifically, patch 1 adds a comment at a callsite of riscv_setup_vsize to clarify how vlenb is observed by the system. Patch 2 fixes the issue by failing the boot process of a secondary core if vlenb mismatches. The second part of the series provide a finer grain view of the Vector extension. Patch 3 give the obsolete ISA parser the ability to expand ISA extensions for sigle letter extensions. Patch 3, 4 introduces Zve32x, Zve32f, Zve64x, Zve64f, Zve64d for isa parsing and hwprobe. Patch 5 updates all callsites such that Vector subextensions are maximumly supported by the kernel. Two parts of the series are sent together to ease the effort of picking dependency patches. The first part can be merged independent of the second one if necessary. The series is tested on a QEMU and verified that booting, Vector programs context-switch, signal, ptrace, prctl interfaces works when we only report partial V from the ISA. Note that the signal test was performed after applying the commit c27fa53b858b ("riscv: Fix vector state restore in rt_sigreturn()") This patch should be able to apply on risc-v for-next branch on top of the commit ba5ea59f768f ("riscv: Do not save the scratch CSR during suspend") [1]: https://lore.kernel.org/all/20240228-vicinity-cornstalk-4b8eb5fe5730@spud/T… Changes in v4: - Add a patch to trigger prctl test on ZVE32X (9) - Add a patch to fix integer promotion bug in hwprobe (8) - Fix a build fail on !CONFIG_RISCV_ISA_V (7) - Add more comment in the assembly code change (2) - Link to v3: https://lore.kernel.org/r/20240318-zve-detection-v3-0-e12d42107fa8@sifive.c… Changelog v3: - Include correct maintainers and mailing list into CC. - Cleanup isa string parser code (3) - Adjust extensions order and name (4, 5) - Refine commit message (6) Changelog v2: - Update comments and commit messages (1, 2, 7) - Refine isa_exts[] lists for zve extensions (4) - Add a patch for dt-binding (5) - Make ZVE* extensions depend on has_vector(ZVE32X) (6, 7) --- --- Andy Chiu (9): riscv: vector: add a comment when calling riscv_setup_vsize() riscv: smp: fail booting up smp if inconsistent vlen is detected riscv: cpufeature: call match_isa_ext() for single-letter extensions riscv: cpufeature: add zve32[xf] and zve64[xfd] isa detection dt-bindings: riscv: add Zve32[xf] Zve64[xfd] ISA extension description riscv: hwprobe: add zve Vector subextensions into hwprobe interface riscv: vector: adjust minimum Vector requirement to ZVE32X hwprobe: fix integer promotion in RISCV_HWPROBE_EXT macro selftest: run vector prctl test for ZVE32X Documentation/arch/riscv/hwprobe.rst | 15 ++++++ .../devicetree/bindings/riscv/extensions.yaml | 30 ++++++++++++ arch/riscv/include/asm/hwcap.h | 5 ++ arch/riscv/include/asm/switch_to.h | 2 +- arch/riscv/include/asm/vector.h | 25 ++++++---- arch/riscv/include/asm/xor.h | 2 +- arch/riscv/include/uapi/asm/hwprobe.h | 7 ++- arch/riscv/kernel/cpufeature.c | 56 ++++++++++++++++++---- arch/riscv/kernel/head.S | 19 +++++--- arch/riscv/kernel/kernel_mode_vector.c | 4 +- arch/riscv/kernel/process.c | 4 +- arch/riscv/kernel/signal.c | 6 +-- arch/riscv/kernel/smpboot.c | 14 ++++-- arch/riscv/kernel/sys_hwprobe.c | 13 ++++- arch/riscv/kernel/vector.c | 15 +++--- arch/riscv/lib/uaccess.S | 2 +- .../testing/selftests/riscv/vector/vstate_prctl.c | 6 +-- 17 files changed, 174 insertions(+), 51 deletions(-) --- base-commit: ba5ea59f768f67d127b319b26ba209ff67e0d9a5 change-id: 20240318-zve-detection-50106d2da527 Best regards, -- Andy Chiu <andy.chiu(a)sifive.com>

17 hours, 12 minutes

6
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[PATCH v4 00/10] clk: Add kunit tests for fixed rate and parent data

by Stephen Boyd

This patch series adds unit tests for the clk fixed rate basic type and the clk registration functions that use struct clk_parent_data. To get there, we add support for loading device tree overlays onto the live DTB along with probing platform drivers to bind to device nodes in the overlays. With this series, we're able to exercise some of the code in the common clk framework that uses devicetree lookups to find parents and the fixed rate clk code that scans device tree directly and creates clks. Please review. I Cced everyone to all the patches so they get the full context. I'm hoping I can take the whole pile through the clk tree as they all build upon each other. Or the DT part can be merged through the DT tree to reduce the dependencies. Changes from v3 (https://lore.kernel.org/r/20230327222159.3509818-1-sboyd@kernel.org): * No longer depend on Frank's series[1] because it was merged upstream[2] * Use kunit_add_action_or_reset() to shorten code * Skip tests properly when CONFIG_OF_OVERLAY isn't set Changes from v2 (https://lore.kernel.org/r/20230315183729.2376178-1-sboyd@kernel.org): * Overlays don't depend on __symbols__ node * Depend on Frank's always create root node if CONFIG_OF series[1] * Added kernel-doc to KUnit API doc * Fixed some kernel-doc on functions * More test cases for fixed rate clk Changes from v1 (https://lore.kernel.org/r/20230302013822.1808711-1-sboyd@kernel.org): * Don't depend on UML, use unittest data approach to attach nodes * Introduce overlay loading API for KUnit * Move platform_device KUnit code to drivers/base/test * Use #define macros for constants shared between unit tests and overlays * Settle on "test" as a vendor prefix * Make KUnit wrappers have "_kunit" postfix [1] https://lore.kernel.org/r/20230317053415.2254616-1-frowand.list@gmail.com [2] https://lore.kernel.org/r/20240308195737.GA1174908-robh@kernel.org Stephen Boyd (10): of: Add test managed wrappers for of_overlay_apply()/of_node_put() dt-bindings: vendor-prefixes: Add "test" vendor for KUnit and friends dt-bindings: test: Add KUnit empty node binding of: Add a KUnit test for overlays and test managed APIs platform: Add test managed platform_device/driver APIs dt-bindings: kunit: Add fixed rate clk consumer test clk: Add test managed clk provider/consumer APIs clk: Add KUnit tests for clk fixed rate basic type dt-bindings: clk: Add KUnit clk_parent_data test clk: Add KUnit tests for clks registered with struct clk_parent_data Documentation/dev-tools/kunit/api/clk.rst | 10 + Documentation/dev-tools/kunit/api/index.rst | 21 + Documentation/dev-tools/kunit/api/of.rst | 13 + .../dev-tools/kunit/api/platformdevice.rst | 10 + .../bindings/clock/test,clk-parent-data.yaml | 47 ++ .../bindings/test/test,clk-fixed-rate.yaml | 35 ++ .../devicetree/bindings/test/test,empty.yaml | 30 ++ .../devicetree/bindings/vendor-prefixes.yaml | 2 + drivers/base/test/Makefile | 3 + drivers/base/test/platform_kunit-test.c | 140 ++++++ drivers/base/test/platform_kunit.c | 174 +++++++ drivers/clk/.kunitconfig | 2 + drivers/clk/Kconfig | 9 + drivers/clk/Makefile | 9 +- drivers/clk/clk-fixed-rate_test.c | 377 +++++++++++++++ drivers/clk/clk-fixed-rate_test.h | 8 + drivers/clk/clk_kunit.c | 198 ++++++++ drivers/clk/clk_parent_data_test.h | 10 + drivers/clk/clk_test.c | 451 +++++++++++++++++- drivers/clk/kunit_clk_fixed_rate_test.dtso | 19 + drivers/clk/kunit_clk_parent_data_test.dtso | 28 ++ drivers/of/.kunitconfig | 1 + drivers/of/Kconfig | 10 + drivers/of/Makefile | 2 + drivers/of/kunit_overlay_test.dtso | 9 + drivers/of/of_kunit.c | 99 ++++ drivers/of/overlay_test.c | 115 +++++ include/kunit/clk.h | 28 ++ include/kunit/of.h | 94 ++++ include/kunit/platform_device.h | 15 + 30 files changed, 1967 insertions(+), 2 deletions(-) create mode 100644 Documentation/dev-tools/kunit/api/clk.rst create mode 100644 Documentation/dev-tools/kunit/api/of.rst create mode 100644 Documentation/dev-tools/kunit/api/platformdevice.rst create mode 100644 Documentation/devicetree/bindings/clock/test,clk-parent-data.yaml create mode 100644 Documentation/devicetree/bindings/test/test,clk-fixed-rate.yaml create mode 100644 Documentation/devicetree/bindings/test/test,empty.yaml create mode 100644 drivers/base/test/platform_kunit-test.c create mode 100644 drivers/base/test/platform_kunit.c create mode 100644 drivers/clk/clk-fixed-rate_test.c create mode 100644 drivers/clk/clk-fixed-rate_test.h create mode 100644 drivers/clk/clk_kunit.c create mode 100644 drivers/clk/clk_parent_data_test.h create mode 100644 drivers/clk/kunit_clk_fixed_rate_test.dtso create mode 100644 drivers/clk/kunit_clk_parent_data_test.dtso create mode 100644 drivers/of/kunit_overlay_test.dtso create mode 100644 drivers/of/of_kunit.c create mode 100644 drivers/of/overlay_test.c create mode 100644 include/kunit/clk.h create mode 100644 include/kunit/of.h create mode 100644 include/kunit/platform_device.h base-commit: 4cece764965020c22cff7665b18a012006359095 -- https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git/ https://git.kernel.org/pub/scm/linux/kernel/git/sboyd/spmi.git

19 hours, 2 minutes

2
13
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[PATCH v2 00/10] selftests: Make ksft_exit functions return void instead of int

by Nathan Chancellor

Hi all, Commit f7d5bcd35d42 ("selftests: kselftest: Mark functions that unconditionally call exit() as __noreturn") marked functions that call exit() as __noreturn but it did not change the return type of these functions from 'void' to 'int' like it should have (since a noreturn function by definition cannot return an integer because it does not return...) because there are many tests that return the result of the ksft_exit function, even though it has never been used due to calling exit(). Prior to adding __noreturn, the compiler would not know that the functions that call exit() will not return, so code like void ksft_exit_fail(void) { exit(1); } void ksft_exit_pass(void) { exit(0); } int main(void) { int ret; ret = foo(); if (ret) ksft_exit_fail(); ksft_exit_pass(); } would cause the compiler to complain that main() does not return an integer, even though when ksft_exit_pass() is called, exit() will cause the program to terminate. So ksft_exit_...() returns int to make the compiler happy. int ksft_exit_fail(void) { exit(1); } int ksft_exit_pass(void) { exit(0); } int main(void) { int ret; ret = foo(); if (ret) return ksft_exit_fail(); return ksft_exit_pass(); } While this results in no warnings, it is weird semantically and it has issues as noted in the aforementioned __noreturn change. Now that __noreturn has been added to these functions, it is much cleaner to change the functions to 'void' and eliminate the return statements, as it has been made clear to the compiler that these functions terminate the program. Drop the return before all instances of ksft_exit_...() in a mostly mechanical way. --- Changes in v2: - Split series into individual patches per subsystem at Shuah's request and CC maintainers for subsystems that have one. - Rewrite commit messages for new patches and move previous commit message into cover letter to high level explain all changes. - Carry forward Thomas and Muhammad's review on patch split, as there were no functional changes, please holler if this was inappropriate. - Link to v1: https://lore.kernel.org/r/20240417-ksft-exit-int-to-void-v1-1-eff48fdbab39@… --- Nathan Chancellor (10): selftests/clone3: ksft_exit functions do not return selftests/ipc: ksft_exit functions do not return selftests: membarrier: ksft_exit_pass() does not return selftests/mm: ksft_exit functions do not return selftests: pidfd: ksft_exit functions do not return selftests/resctrl: ksft_exit_skip() does not return selftests: sync: ksft_exit_pass() does not return selftests: timers: ksft_exit functions do not return selftests: x86: ksft_exit_pass() does not return selftests: kselftest: Make ksft_exit functions return void instead of int tools/testing/selftests/clone3/clone3_clear_sighand.c | 2 +- tools/testing/selftests/clone3/clone3_set_tid.c | 4 +++- tools/testing/selftests/ipc/msgque.c | 11 +++++------ tools/testing/selftests/kselftest.h | 12 ++++++------ .../selftests/membarrier/membarrier_test_multi_thread.c | 2 +- .../selftests/membarrier/membarrier_test_single_thread.c | 2 +- tools/testing/selftests/mm/compaction_test.c | 6 +++--- tools/testing/selftests/mm/cow.c | 2 +- tools/testing/selftests/mm/gup_longterm.c | 2 +- tools/testing/selftests/mm/gup_test.c | 4 ++-- tools/testing/selftests/mm/ksm_functional_tests.c | 2 +- tools/testing/selftests/mm/madv_populate.c | 2 +- tools/testing/selftests/mm/mkdirty.c | 2 +- tools/testing/selftests/mm/pagemap_ioctl.c | 4 ++-- tools/testing/selftests/mm/soft-dirty.c | 2 +- tools/testing/selftests/pidfd/pidfd_fdinfo_test.c | 2 +- tools/testing/selftests/pidfd/pidfd_open_test.c | 4 +++- tools/testing/selftests/pidfd/pidfd_poll_test.c | 2 +- tools/testing/selftests/pidfd/pidfd_test.c | 2 +- tools/testing/selftests/resctrl/resctrl_tests.c | 6 +++--- tools/testing/selftests/sync/sync_test.c | 3 +-- tools/testing/selftests/timers/adjtick.c | 4 ++-- tools/testing/selftests/timers/alarmtimer-suspend.c | 4 ++-- tools/testing/selftests/timers/change_skew.c | 4 ++-- tools/testing/selftests/timers/freq-step.c | 4 ++-- tools/testing/selftests/timers/leap-a-day.c | 10 +++++----- tools/testing/selftests/timers/leapcrash.c | 4 ++-- tools/testing/selftests/timers/mqueue-lat.c | 4 ++-- tools/testing/selftests/timers/posix_timers.c | 12 ++++++------ tools/testing/selftests/timers/raw_skew.c | 6 +++--- tools/testing/selftests/timers/set-2038.c | 4 ++-- tools/testing/selftests/timers/set-tai.c | 4 ++-- tools/testing/selftests/timers/set-timer-lat.c | 4 ++-- tools/testing/selftests/timers/set-tz.c | 4 ++-- tools/testing/selftests/timers/skew_consistency.c | 4 ++-- tools/testing/selftests/timers/threadtest.c | 2 +- tools/testing/selftests/timers/valid-adjtimex.c | 6 +++--- tools/testing/selftests/x86/lam.c | 2 +- 38 files changed, 81 insertions(+), 79 deletions(-) --- base-commit: 0e275f65f3ef9c662b678655c70aca555fbde304 change-id: 20240416-ksft-exit-int-to-void-5aa9db381379 Best regards, -- Nathan Chancellor <nathan(a)kernel.org>

19 hours, 49 minutes

1
10
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[PATCH] KVM: selftests: Add 'malloc' failure check in test_vmx_nested_state

by Kunwu Chan

There is a 'malloc' call in test_vmx_nested_state function, which can be unsuccessful. This patch will add the malloc failure checking to avoid possible null dereference and give more information about test fail reasons. Signed-off-by: Kunwu Chan <chentao(a)kylinos.cn> --- tools/testing/selftests/kvm/x86_64/vmx_set_nested_state_test.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/kvm/x86_64/vmx_set_nested_state_test.c b/tools/testing/selftests/kvm/x86_64/vmx_set_nested_state_test.c index 67a62a5a8895..18afc2000a74 100644 --- a/tools/testing/selftests/kvm/x86_64/vmx_set_nested_state_test.c +++ b/tools/testing/selftests/kvm/x86_64/vmx_set_nested_state_test.c @@ -91,6 +91,7 @@ void test_vmx_nested_state(struct kvm_vcpu *vcpu) const int state_sz = sizeof(struct kvm_nested_state) + getpagesize(); struct kvm_nested_state *state = (struct kvm_nested_state *)malloc(state_sz); + TEST_ASSERT(state, "-ENOMEM when allocating kvm state"); /* The format must be set to 0. 0 for VMX, 1 for SVM. */ set_default_vmx_state(state, state_sz); -- 2.40.1

19 hours, 54 minutes

8
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[PATCH] selftests: Make ksft_exit functions return void instead of int

by Nathan Chancellor

Commit f7d5bcd35d42 ("selftests: kselftest: Mark functions that unconditionally call exit() as __noreturn") marked functions that call exit() as __noreturn but it did not change the return type of these functions from 'void' to 'int' like it should have (since a noreturn function by definition cannot return an integer because it does not return...) because there are many tests that return the result of the ksft_exit function, even though it has never been used due to calling exit(). Prior to adding __noreturn, the compiler would not know that the functions that call exit() will not return, so code like void ksft_exit_fail(void) { exit(1); } void ksft_exit_pass(void) { exit(0); } int main(void) { int ret; ret = foo(); if (ret) ksft_exit_fail(); ksft_exit_pass(); } would cause the compiler to complain that main() does not return an integer, even though when ksft_exit_pass() is called, exit() will cause the program to terminate. So ksft_exit_...() returns int to make the compiler happy. int ksft_exit_fail(void) { exit(1); } int ksft_exit_pass(void) { exit(0); } int main(void) { int ret; ret = foo(); if (ret) return ksft_exit_fail(); return ksft_exit_pass(); } While this results in no warnings, it is weird semantically and it has issues as noted in the aforementioned __noreturn change. Now that __noreturn has been added to these functions, it is much cleaner to change the functions to 'void' and eliminate the return statements, as it has been made clear to the compiler that these functions terminate the program. Drop the return before all instances of ksft_exit_...() in a mechanical way. Only two manually changes were made to transform return !ret ? ksft_exit_pass() : ksft_exit_fail(); into the more idiomatic if (ret) ksft_exit_fail(); ksft_exit_pass(); as well as a few style clean ups now that the code is shorter. Signed-off-by: Nathan Chancellor <nathan(a)kernel.org> --- tools/testing/selftests/clone3/clone3_clear_sighand.c | 2 +- tools/testing/selftests/clone3/clone3_set_tid.c | 4 +++- tools/testing/selftests/ipc/msgque.c | 11 +++++------ tools/testing/selftests/kselftest.h | 12 ++++++------ .../selftests/membarrier/membarrier_test_multi_thread.c | 2 +- .../selftests/membarrier/membarrier_test_single_thread.c | 2 +- tools/testing/selftests/mm/compaction_test.c | 6 +++--- tools/testing/selftests/mm/cow.c | 2 +- tools/testing/selftests/mm/gup_longterm.c | 2 +- tools/testing/selftests/mm/gup_test.c | 4 ++-- tools/testing/selftests/mm/ksm_functional_tests.c | 2 +- tools/testing/selftests/mm/madv_populate.c | 2 +- tools/testing/selftests/mm/mkdirty.c | 2 +- tools/testing/selftests/mm/pagemap_ioctl.c | 4 ++-- tools/testing/selftests/mm/soft-dirty.c | 2 +- tools/testing/selftests/pidfd/pidfd_fdinfo_test.c | 2 +- tools/testing/selftests/pidfd/pidfd_open_test.c | 4 +++- tools/testing/selftests/pidfd/pidfd_poll_test.c | 2 +- tools/testing/selftests/pidfd/pidfd_test.c | 2 +- tools/testing/selftests/resctrl/resctrl_tests.c | 6 +++--- tools/testing/selftests/sync/sync_test.c | 3 +-- tools/testing/selftests/timers/adjtick.c | 4 ++-- tools/testing/selftests/timers/alarmtimer-suspend.c | 4 ++-- tools/testing/selftests/timers/change_skew.c | 4 ++-- tools/testing/selftests/timers/freq-step.c | 4 ++-- tools/testing/selftests/timers/leap-a-day.c | 10 +++++----- tools/testing/selftests/timers/leapcrash.c | 4 ++-- tools/testing/selftests/timers/mqueue-lat.c | 4 ++-- tools/testing/selftests/timers/posix_timers.c | 12 ++++++------ tools/testing/selftests/timers/raw_skew.c | 6 +++--- tools/testing/selftests/timers/set-2038.c | 4 ++-- tools/testing/selftests/timers/set-tai.c | 4 ++-- tools/testing/selftests/timers/set-timer-lat.c | 4 ++-- tools/testing/selftests/timers/set-tz.c | 4 ++-- tools/testing/selftests/timers/skew_consistency.c | 4 ++-- tools/testing/selftests/timers/threadtest.c | 2 +- tools/testing/selftests/timers/valid-adjtimex.c | 6 +++--- tools/testing/selftests/x86/lam.c | 2 +- 38 files changed, 81 insertions(+), 79 deletions(-) diff --git a/tools/testing/selftests/clone3/clone3_clear_sighand.c b/tools/testing/selftests/clone3/clone3_clear_sighand.c index 54a8b2445be9..ce0426786828 100644 --- a/tools/testing/selftests/clone3/clone3_clear_sighand.c +++ b/tools/testing/selftests/clone3/clone3_clear_sighand.c @@ -120,5 +120,5 @@ int main(int argc, char **argv) test_clone3_clear_sighand(); - return ksft_exit_pass(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/clone3/clone3_set_tid.c b/tools/testing/selftests/clone3/clone3_set_tid.c index fbf813a5a06f..bfb0da2b4fdd 100644 --- a/tools/testing/selftests/clone3/clone3_set_tid.c +++ b/tools/testing/selftests/clone3/clone3_set_tid.c @@ -412,5 +412,7 @@ int main(int argc, char *argv[]) out: ret = 0; - return !ret ? ksft_exit_pass() : ksft_exit_fail(); + if (ret) + ksft_exit_fail(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/ipc/msgque.c b/tools/testing/selftests/ipc/msgque.c index 656c43c24044..c75ea4094870 100644 --- a/tools/testing/selftests/ipc/msgque.c +++ b/tools/testing/selftests/ipc/msgque.c @@ -198,13 +198,12 @@ int main(int argc, char **argv) struct msgque_data msgque; if (getuid() != 0) - return ksft_exit_skip( - "Please run the test as root - Exiting.\n"); + ksft_exit_skip("Please run the test as root - Exiting.\n"); msgque.key = ftok(argv[0], 822155650); if (msgque.key == -1) { printf("Can't make key: %d\n", -errno); - return ksft_exit_fail(); + ksft_exit_fail(); } msgque.msq_id = msgget(msgque.key, IPC_CREAT | IPC_EXCL | 0666); @@ -243,13 +242,13 @@ int main(int argc, char **argv) printf("Failed to test queue: %d\n", err); goto err_out; } - return ksft_exit_pass(); + ksft_exit_pass(); err_destroy: if (msgctl(msgque.msq_id, IPC_RMID, NULL)) { printf("Failed to destroy queue: %d\n", -errno); - return ksft_exit_fail(); + ksft_exit_fail(); } err_out: - return ksft_exit_fail(); + ksft_exit_fail(); } diff --git a/tools/testing/selftests/kselftest.h b/tools/testing/selftests/kselftest.h index 9bb1664bcf95..f4221691a7da 100644 --- a/tools/testing/selftests/kselftest.h +++ b/tools/testing/selftests/kselftest.h @@ -327,13 +327,13 @@ void ksft_test_result_code(int exit_code, const char *test_name, break; \ } } while (0) -static inline __noreturn int ksft_exit_pass(void) +static inline __noreturn void ksft_exit_pass(void) { ksft_print_cnts(); exit(KSFT_PASS); } -static inline __noreturn int ksft_exit_fail(void) +static inline __noreturn void ksft_exit_fail(void) { ksft_print_cnts(); exit(KSFT_FAIL); @@ -360,7 +360,7 @@ static inline __noreturn int ksft_exit_fail(void) ksft_cnt.ksft_xfail + \ ksft_cnt.ksft_xskip) -static inline __noreturn __printf(1, 2) int ksft_exit_fail_msg(const char *msg, ...) +static inline __noreturn __printf(1, 2) void ksft_exit_fail_msg(const char *msg, ...) { int saved_errno = errno; va_list args; @@ -388,19 +388,19 @@ static inline __noreturn void ksft_exit_fail_perror(const char *msg) #endif } -static inline __noreturn int ksft_exit_xfail(void) +static inline __noreturn void ksft_exit_xfail(void) { ksft_print_cnts(); exit(KSFT_XFAIL); } -static inline __noreturn int ksft_exit_xpass(void) +static inline __noreturn void ksft_exit_xpass(void) { ksft_print_cnts(); exit(KSFT_XPASS); } -static inline __noreturn __printf(1, 2) int ksft_exit_skip(const char *msg, ...) +static inline __noreturn __printf(1, 2) void ksft_exit_skip(const char *msg, ...) { int saved_errno = errno; va_list args; diff --git a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c index a9cc17facfb3..4e14dba81234 100644 --- a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c +++ b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c @@ -69,5 +69,5 @@ int main(int argc, char **argv) /* Multi-threaded */ test_mt_membarrier(); - return ksft_exit_pass(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c index 4cdc8b1d124c..fa3f1d6c37a0 100644 --- a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c +++ b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c @@ -24,5 +24,5 @@ int main(int argc, char **argv) test_membarrier_get_registrations(/*cmd=*/0); - return ksft_exit_pass(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/mm/compaction_test.c b/tools/testing/selftests/mm/compaction_test.c index 533999b6c284..4f42eb7d7636 100644 --- a/tools/testing/selftests/mm/compaction_test.c +++ b/tools/testing/selftests/mm/compaction_test.c @@ -177,7 +177,7 @@ int main(int argc, char **argv) ksft_print_header(); if (prereq() || geteuid()) - return ksft_exit_skip("Prerequisites unsatisfied\n"); + ksft_exit_skip("Prerequisites unsatisfied\n"); ksft_set_plan(1); @@ -225,7 +225,7 @@ int main(int argc, char **argv) } if (check_compaction(mem_free, hugepage_size) == 0) - return ksft_exit_pass(); + ksft_exit_pass(); - return ksft_exit_fail(); + ksft_exit_fail(); } diff --git a/tools/testing/selftests/mm/cow.c b/tools/testing/selftests/mm/cow.c index 363bf5f801be..fe078d6e1806 100644 --- a/tools/testing/selftests/mm/cow.c +++ b/tools/testing/selftests/mm/cow.c @@ -1779,5 +1779,5 @@ int main(int argc, char **argv) if (err) ksft_exit_fail_msg("%d out of %d tests failed\n", err, ksft_test_num()); - return ksft_exit_pass(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/mm/gup_longterm.c b/tools/testing/selftests/mm/gup_longterm.c index ad168d35b23b..d7eaca5bbe9b 100644 --- a/tools/testing/selftests/mm/gup_longterm.c +++ b/tools/testing/selftests/mm/gup_longterm.c @@ -456,5 +456,5 @@ int main(int argc, char **argv) if (err) ksft_exit_fail_msg("%d out of %d tests failed\n", err, ksft_test_num()); - return ksft_exit_pass(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/mm/gup_test.c b/tools/testing/selftests/mm/gup_test.c index 18a49c70d4c6..bd335cf9bc0e 100644 --- a/tools/testing/selftests/mm/gup_test.c +++ b/tools/testing/selftests/mm/gup_test.c @@ -228,7 +228,7 @@ int main(int argc, char **argv) break; } ksft_test_result_skip("Please run this test as root\n"); - return ksft_exit_pass(); + ksft_exit_pass(); } p = mmap(NULL, size, PROT_READ | PROT_WRITE, flags, filed, 0); @@ -267,5 +267,5 @@ int main(int argc, char **argv) free(tid); - return ksft_exit_pass(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/mm/ksm_functional_tests.c b/tools/testing/selftests/mm/ksm_functional_tests.c index d615767e396b..508287560c45 100644 --- a/tools/testing/selftests/mm/ksm_functional_tests.c +++ b/tools/testing/selftests/mm/ksm_functional_tests.c @@ -646,5 +646,5 @@ int main(int argc, char **argv) if (err) ksft_exit_fail_msg("%d out of %d tests failed\n", err, ksft_test_num()); - return ksft_exit_pass(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/mm/madv_populate.c b/tools/testing/selftests/mm/madv_populate.c index 17bcb07f19f3..ef7d911da13e 100644 --- a/tools/testing/selftests/mm/madv_populate.c +++ b/tools/testing/selftests/mm/madv_populate.c @@ -307,5 +307,5 @@ int main(int argc, char **argv) if (err) ksft_exit_fail_msg("%d out of %d tests failed\n", err, ksft_test_num()); - return ksft_exit_pass(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/mm/mkdirty.c b/tools/testing/selftests/mm/mkdirty.c index 301abb99e027..b8a7efe9204e 100644 --- a/tools/testing/selftests/mm/mkdirty.c +++ b/tools/testing/selftests/mm/mkdirty.c @@ -375,5 +375,5 @@ int main(void) if (err) ksft_exit_fail_msg("%d out of %d tests failed\n", err, ksft_test_num()); - return ksft_exit_pass(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/mm/pagemap_ioctl.c b/tools/testing/selftests/mm/pagemap_ioctl.c index d59517ed3d48..2d785aca72a5 100644 --- a/tools/testing/selftests/mm/pagemap_ioctl.c +++ b/tools/testing/selftests/mm/pagemap_ioctl.c @@ -1484,7 +1484,7 @@ int main(int argc, char *argv[]) ksft_print_header(); if (init_uffd()) - return ksft_exit_pass(); + ksft_exit_pass(); ksft_set_plan(115); @@ -1660,5 +1660,5 @@ int main(int argc, char *argv[]) userfaultfd_tests(); close(pagemap_fd); - return ksft_exit_pass(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/mm/soft-dirty.c b/tools/testing/selftests/mm/soft-dirty.c index 7dbfa53d93a0..d9dbf879748b 100644 --- a/tools/testing/selftests/mm/soft-dirty.c +++ b/tools/testing/selftests/mm/soft-dirty.c @@ -209,5 +209,5 @@ int main(int argc, char **argv) close(pagemap_fd); - return ksft_exit_pass(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c index 01cc37bf611c..f062a986e382 100644 --- a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c +++ b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c @@ -307,5 +307,5 @@ int main(int argc, char **argv) test_pidfd_fdinfo_nspid(); test_pidfd_dead_fdinfo(); - return ksft_exit_pass(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/pidfd/pidfd_open_test.c b/tools/testing/selftests/pidfd/pidfd_open_test.c index 8a59438ccc78..c62564c264b1 100644 --- a/tools/testing/selftests/pidfd/pidfd_open_test.c +++ b/tools/testing/selftests/pidfd/pidfd_open_test.c @@ -159,5 +159,7 @@ int main(int argc, char **argv) if (pidfd >= 0) close(pidfd); - return !ret ? ksft_exit_pass() : ksft_exit_fail(); + if (ret) + ksft_exit_fail(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/pidfd/pidfd_poll_test.c b/tools/testing/selftests/pidfd/pidfd_poll_test.c index 610811275357..55d74a50358f 100644 --- a/tools/testing/selftests/pidfd/pidfd_poll_test.c +++ b/tools/testing/selftests/pidfd/pidfd_poll_test.c @@ -112,5 +112,5 @@ int main(int argc, char **argv) } ksft_test_result_pass("pidfd poll test: pass\n"); - return ksft_exit_pass(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/pidfd/pidfd_test.c b/tools/testing/selftests/pidfd/pidfd_test.c index c081ae91313a..9faa686f90e4 100644 --- a/tools/testing/selftests/pidfd/pidfd_test.c +++ b/tools/testing/selftests/pidfd/pidfd_test.c @@ -572,5 +572,5 @@ int main(int argc, char **argv) test_pidfd_send_signal_exited_fail(); test_pidfd_send_signal_recycled_pid_fail(); - return ksft_exit_pass(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/resctrl/resctrl_tests.c b/tools/testing/selftests/resctrl/resctrl_tests.c index 348d17cb2a84..ecbb7605a981 100644 --- a/tools/testing/selftests/resctrl/resctrl_tests.c +++ b/tools/testing/selftests/resctrl/resctrl_tests.c @@ -247,13 +247,13 @@ int main(int argc, char **argv) * 2. We execute perf commands */ if (geteuid() != 0) - return ksft_exit_skip("Not running as root. Skipping...\n"); + ksft_exit_skip("Not running as root. Skipping...\n"); if (!check_resctrlfs_support()) - return ksft_exit_skip("resctrl FS does not exist. Enable X86_CPU_RESCTRL config option.\n"); + ksft_exit_skip("resctrl FS does not exist. Enable X86_CPU_RESCTRL config option.\n"); if (umount_resctrlfs()) - return ksft_exit_skip("resctrl FS unmount failed.\n"); + ksft_exit_skip("resctrl FS unmount failed.\n"); filter_dmesg(); diff --git a/tools/testing/selftests/sync/sync_test.c b/tools/testing/selftests/sync/sync_test.c index 414a617db993..93db5aa246a3 100644 --- a/tools/testing/selftests/sync/sync_test.c +++ b/tools/testing/selftests/sync/sync_test.c @@ -109,6 +109,5 @@ int main(void) ksft_exit_fail_msg("%d out of %d sync tests failed\n", err, ksft_test_num()); - /* need this return to keep gcc happy */ - return ksft_exit_pass(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/timers/adjtick.c b/tools/testing/selftests/timers/adjtick.c index 47e05fdc32c5..205b76a4abb4 100644 --- a/tools/testing/selftests/timers/adjtick.c +++ b/tools/testing/selftests/timers/adjtick.c @@ -205,7 +205,7 @@ int main(int argc, char **argv) adjtimex(&tx1); if (err) - return ksft_exit_fail(); + ksft_exit_fail(); - return ksft_exit_pass(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/timers/alarmtimer-suspend.c b/tools/testing/selftests/timers/alarmtimer-suspend.c index 4332b494103d..ad52e608b88e 100644 --- a/tools/testing/selftests/timers/alarmtimer-suspend.c +++ b/tools/testing/selftests/timers/alarmtimer-suspend.c @@ -173,6 +173,6 @@ int main(void) timer_delete(tm1); } if (final_ret) - return ksft_exit_fail(); - return ksft_exit_pass(); + ksft_exit_fail(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/timers/change_skew.c b/tools/testing/selftests/timers/change_skew.c index 992a77f2a74c..4421cd562c24 100644 --- a/tools/testing/selftests/timers/change_skew.c +++ b/tools/testing/selftests/timers/change_skew.c @@ -89,8 +89,8 @@ int main(int argc, char **argv) if (ret) { printf("[FAIL]"); - return ksft_exit_fail(); + ksft_exit_fail(); } printf("[OK]"); - return ksft_exit_pass(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/timers/freq-step.c b/tools/testing/selftests/timers/freq-step.c index 4b76450d78d1..73b636f89fdc 100644 --- a/tools/testing/selftests/timers/freq-step.c +++ b/tools/testing/selftests/timers/freq-step.c @@ -257,7 +257,7 @@ int main(int argc, char **argv) set_frequency(0.0); if (fails) - return ksft_exit_fail(); + ksft_exit_fail(); - return ksft_exit_pass(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/timers/leap-a-day.c b/tools/testing/selftests/timers/leap-a-day.c index 23eb398c8140..986abbdb1521 100644 --- a/tools/testing/selftests/timers/leap-a-day.c +++ b/tools/testing/selftests/timers/leap-a-day.c @@ -268,7 +268,7 @@ int main(int argc, char **argv) if (ret < 0) { printf("Error: Problem setting STA_INS/STA_DEL!: %s\n", time_state_str(ret)); - return ksft_exit_fail(); + ksft_exit_fail(); } /* Validate STA_INS was set */ @@ -277,7 +277,7 @@ int main(int argc, char **argv) if (tx.status != STA_INS && tx.status != STA_DEL) { printf("Error: STA_INS/STA_DEL not set!: %s\n", time_state_str(ret)); - return ksft_exit_fail(); + ksft_exit_fail(); } if (tai_time) { @@ -295,7 +295,7 @@ int main(int argc, char **argv) se.sigev_value.sival_int = 0; if (timer_create(CLOCK_REALTIME, &se, &tm1) == -1) { printf("Error: timer_create failed\n"); - return ksft_exit_fail(); + ksft_exit_fail(); } its1.it_value.tv_sec = next_leap; its1.it_value.tv_nsec = 0; @@ -366,7 +366,7 @@ int main(int argc, char **argv) if (error_found) { printf("Errors observed\n"); clear_time_state(); - return ksft_exit_fail(); + ksft_exit_fail(); } printf("\n"); if ((iterations != -1) && !(--iterations)) @@ -374,5 +374,5 @@ int main(int argc, char **argv) } clear_time_state(); - return ksft_exit_pass(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/timers/leapcrash.c b/tools/testing/selftests/timers/leapcrash.c index f70802c5dd0d..8fd065eec904 100644 --- a/tools/testing/selftests/timers/leapcrash.c +++ b/tools/testing/selftests/timers/leapcrash.c @@ -87,7 +87,7 @@ int main(void) tv.tv_usec = 0; if (settimeofday(&tv, NULL)) { printf("Error: You're likely not running with proper (ie: root) permissions\n"); - return ksft_exit_fail(); + ksft_exit_fail(); } tx.modes = 0; adjtimex(&tx); @@ -104,5 +104,5 @@ int main(void) fflush(stdout); } printf("[OK]\n"); - return ksft_exit_pass(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/timers/mqueue-lat.c b/tools/testing/selftests/timers/mqueue-lat.c index 7916cf5cc6ff..f3179a605bba 100644 --- a/tools/testing/selftests/timers/mqueue-lat.c +++ b/tools/testing/selftests/timers/mqueue-lat.c @@ -107,8 +107,8 @@ int main(int argc, char **argv) ret = mqueue_lat_test(); if (ret < 0) { printf("[FAILED]\n"); - return ksft_exit_fail(); + ksft_exit_fail(); } printf("[OK]\n"); - return ksft_exit_pass(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/timers/posix_timers.c b/tools/testing/selftests/timers/posix_timers.c index c001dd79179d..07c81c0093c0 100644 --- a/tools/testing/selftests/timers/posix_timers.c +++ b/tools/testing/selftests/timers/posix_timers.c @@ -260,16 +260,16 @@ int main(int argc, char **argv) ksft_print_msg("based timers if other threads run on the CPU...\n"); if (check_itimer(ITIMER_VIRTUAL) < 0) - return ksft_exit_fail(); + ksft_exit_fail(); if (check_itimer(ITIMER_PROF) < 0) - return ksft_exit_fail(); + ksft_exit_fail(); if (check_itimer(ITIMER_REAL) < 0) - return ksft_exit_fail(); + ksft_exit_fail(); if (check_timer_create(CLOCK_THREAD_CPUTIME_ID) < 0) - return ksft_exit_fail(); + ksft_exit_fail(); /* * It's unfortunately hard to reliably test a timer expiration @@ -281,10 +281,10 @@ int main(int argc, char **argv) * find a better solution. */ if (check_timer_create(CLOCK_PROCESS_CPUTIME_ID) < 0) - return ksft_exit_fail(); + ksft_exit_fail(); if (check_timer_distribution() < 0) - return ksft_exit_fail(); + ksft_exit_fail(); ksft_finished(); } diff --git a/tools/testing/selftests/timers/raw_skew.c b/tools/testing/selftests/timers/raw_skew.c index 6eba203f9da7..030143eb09b4 100644 --- a/tools/testing/selftests/timers/raw_skew.c +++ b/tools/testing/selftests/timers/raw_skew.c @@ -137,11 +137,11 @@ int main(int argc, char **argv) if (tx1.offset || tx2.offset || tx1.freq != tx2.freq || tx1.tick != tx2.tick) { printf(" [SKIP]\n"); - return ksft_exit_skip("The clock was adjusted externally. Shutdown NTPd or other time sync daemons\n"); + ksft_exit_skip("The clock was adjusted externally. Shutdown NTPd or other time sync daemons\n"); } printf(" [FAILED]\n"); - return ksft_exit_fail(); + ksft_exit_fail(); } printf(" [OK]\n"); - return ksft_exit_pass(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/timers/set-2038.c b/tools/testing/selftests/timers/set-2038.c index 688cfd81b531..f7d978721b9e 100644 --- a/tools/testing/selftests/timers/set-2038.c +++ b/tools/testing/selftests/timers/set-2038.c @@ -128,6 +128,6 @@ int main(int argc, char *argv[]) /* restore clock */ settime(start); if (ret) - return ksft_exit_fail(); - return ksft_exit_pass(); + ksft_exit_fail(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/timers/set-tai.c b/tools/testing/selftests/timers/set-tai.c index 8c4179ee2ca2..5b67462efcd6 100644 --- a/tools/testing/selftests/timers/set-tai.c +++ b/tools/testing/selftests/timers/set-tai.c @@ -61,9 +61,9 @@ int main(int argc, char **argv) ret = get_tai(); if (ret != i) { printf("[FAILED] expected: %i got %i\n", i, ret); - return ksft_exit_fail(); + ksft_exit_fail(); } } printf("[OK]\n"); - return ksft_exit_pass(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/timers/set-timer-lat.c b/tools/testing/selftests/timers/set-timer-lat.c index 50da45437daa..7ce240c89b21 100644 --- a/tools/testing/selftests/timers/set-timer-lat.c +++ b/tools/testing/selftests/timers/set-timer-lat.c @@ -278,6 +278,6 @@ int main(void) ret |= do_timer_oneshot(clock_id, 0); } if (ret) - return ksft_exit_fail(); - return ksft_exit_pass(); + ksft_exit_fail(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/timers/set-tz.c b/tools/testing/selftests/timers/set-tz.c index 62bd33eb16f0..20daaf1782b7 100644 --- a/tools/testing/selftests/timers/set-tz.c +++ b/tools/testing/selftests/timers/set-tz.c @@ -102,9 +102,9 @@ int main(int argc, char **argv) printf("[OK]\n"); set_tz(min, dst); - return ksft_exit_pass(); + ksft_exit_pass(); err: set_tz(min, dst); - return ksft_exit_fail(); + ksft_exit_fail(); } diff --git a/tools/testing/selftests/timers/skew_consistency.c b/tools/testing/selftests/timers/skew_consistency.c index 63913f75b384..c8e6bffe4e0a 100644 --- a/tools/testing/selftests/timers/skew_consistency.c +++ b/tools/testing/selftests/timers/skew_consistency.c @@ -70,8 +70,8 @@ int main(int argc, char **argv) if (ret) { printf("[FAILED]\n"); - return ksft_exit_fail(); + ksft_exit_fail(); } printf("[OK]\n"); - return ksft_exit_pass(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/timers/threadtest.c b/tools/testing/selftests/timers/threadtest.c index 80aed4bf06fb..76b38e41d9c7 100644 --- a/tools/testing/selftests/timers/threadtest.c +++ b/tools/testing/selftests/timers/threadtest.c @@ -189,5 +189,5 @@ int main(int argc, char **argv) /* die */ if (ret) ksft_exit_fail(); - return ksft_exit_pass(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/timers/valid-adjtimex.c b/tools/testing/selftests/timers/valid-adjtimex.c index d13ebde20322..d500884801d8 100644 --- a/tools/testing/selftests/timers/valid-adjtimex.c +++ b/tools/testing/selftests/timers/valid-adjtimex.c @@ -320,10 +320,10 @@ int validate_set_offset(void) int main(int argc, char **argv) { if (validate_freq()) - return ksft_exit_fail(); + ksft_exit_fail(); if (validate_set_offset()) - return ksft_exit_fail(); + ksft_exit_fail(); - return ksft_exit_pass(); + ksft_exit_pass(); } diff --git a/tools/testing/selftests/x86/lam.c b/tools/testing/selftests/x86/lam.c index 215b8150b7cc..820db4864292 100644 --- a/tools/testing/selftests/x86/lam.c +++ b/tools/testing/selftests/x86/lam.c @@ -1237,5 +1237,5 @@ int main(int argc, char **argv) ksft_set_plan(tests_cnt); - return ksft_exit_pass(); + ksft_exit_pass(); } --- base-commit: 00ab560eb0e3f9725521c9fec2e8992e9e7e6c29 change-id: 20240416-ksft-exit-int-to-void-5aa9db381379 Best regards, -- Nathan Chancellor <nathan(a)kernel.org>

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