From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ... --- .../testing/selftests/kvm/x86_64/sync_regs_test.c | 237 +++++++++++++++++++++ 1 file changed, 237 insertions(+) create mode 100644 tools/testing/selftests/kvm/x86_64/sync_regs_test.c (limited to 'tools/testing/selftests/kvm/x86_64/sync_regs_test.c') diff --git a/tools/testing/selftests/kvm/x86_64/sync_regs_test.c b/tools/testing/selftests/kvm/x86_64/sync_regs_test.c new file mode 100644 index 000000000..d2f9b5bdf --- /dev/null +++ b/tools/testing/selftests/kvm/x86_64/sync_regs_test.c @@ -0,0 +1,237 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Test for x86 KVM_CAP_SYNC_REGS + * + * Copyright (C) 2018, Google LLC. + * + * Verifies expected behavior of x86 KVM_CAP_SYNC_REGS functionality, + * including requesting an invalid register set, updates to/from values + * in kvm_run.s.regs when kvm_valid_regs and kvm_dirty_regs are toggled. + */ + +#define _GNU_SOURCE /* for program_invocation_short_name */ +#include +#include +#include +#include +#include + +#include "test_util.h" +#include "kvm_util.h" +#include "processor.h" + +#define UCALL_PIO_PORT ((uint16_t)0x1000) + +struct ucall uc_none = { + .cmd = UCALL_NONE, +}; + +/* + * ucall is embedded here to protect against compiler reshuffling registers + * before calling a function. In this test we only need to get KVM_EXIT_IO + * vmexit and preserve RBX, no additional information is needed. + */ +void guest_code(void) +{ + asm volatile("1: in %[port], %%al\n" + "add $0x1, %%rbx\n" + "jmp 1b" + : : [port] "d" (UCALL_PIO_PORT), "D" (&uc_none) + : "rax", "rbx"); +} + +static void compare_regs(struct kvm_regs *left, struct kvm_regs *right) +{ +#define REG_COMPARE(reg) \ + TEST_ASSERT(left->reg == right->reg, \ + "Register " #reg \ + " values did not match: 0x%llx, 0x%llx\n", \ + left->reg, right->reg) + REG_COMPARE(rax); + REG_COMPARE(rbx); + REG_COMPARE(rcx); + REG_COMPARE(rdx); + REG_COMPARE(rsi); + REG_COMPARE(rdi); + REG_COMPARE(rsp); + REG_COMPARE(rbp); + REG_COMPARE(r8); + REG_COMPARE(r9); + REG_COMPARE(r10); + REG_COMPARE(r11); + REG_COMPARE(r12); + REG_COMPARE(r13); + REG_COMPARE(r14); + REG_COMPARE(r15); + REG_COMPARE(rip); + REG_COMPARE(rflags); +#undef REG_COMPARE +} + +static void compare_sregs(struct kvm_sregs *left, struct kvm_sregs *right) +{ +} + +static void compare_vcpu_events(struct kvm_vcpu_events *left, + struct kvm_vcpu_events *right) +{ +} + +#define TEST_SYNC_FIELDS (KVM_SYNC_X86_REGS|KVM_SYNC_X86_SREGS|KVM_SYNC_X86_EVENTS) +#define INVALID_SYNC_FIELD 0x80000000 + +int main(int argc, char *argv[]) +{ + struct kvm_vcpu *vcpu; + struct kvm_vm *vm; + struct kvm_run *run; + struct kvm_regs regs; + struct kvm_sregs sregs; + struct kvm_vcpu_events events; + int rv, cap; + + cap = kvm_check_cap(KVM_CAP_SYNC_REGS); + TEST_REQUIRE((cap & TEST_SYNC_FIELDS) == TEST_SYNC_FIELDS); + TEST_REQUIRE(!(cap & INVALID_SYNC_FIELD)); + + vm = vm_create_with_one_vcpu(&vcpu, guest_code); + + run = vcpu->run; + + /* Request reading invalid register set from VCPU. */ + run->kvm_valid_regs = INVALID_SYNC_FIELD; + rv = _vcpu_run(vcpu); + TEST_ASSERT(rv < 0 && errno == EINVAL, + "Invalid kvm_valid_regs did not cause expected KVM_RUN error: %d\n", + rv); + run->kvm_valid_regs = 0; + + run->kvm_valid_regs = INVALID_SYNC_FIELD | TEST_SYNC_FIELDS; + rv = _vcpu_run(vcpu); + TEST_ASSERT(rv < 0 && errno == EINVAL, + "Invalid kvm_valid_regs did not cause expected KVM_RUN error: %d\n", + rv); + run->kvm_valid_regs = 0; + + /* Request setting invalid register set into VCPU. */ + run->kvm_dirty_regs = INVALID_SYNC_FIELD; + rv = _vcpu_run(vcpu); + TEST_ASSERT(rv < 0 && errno == EINVAL, + "Invalid kvm_dirty_regs did not cause expected KVM_RUN error: %d\n", + rv); + run->kvm_dirty_regs = 0; + + run->kvm_dirty_regs = INVALID_SYNC_FIELD | TEST_SYNC_FIELDS; + rv = _vcpu_run(vcpu); + TEST_ASSERT(rv < 0 && errno == EINVAL, + "Invalid kvm_dirty_regs did not cause expected KVM_RUN error: %d\n", + rv); + run->kvm_dirty_regs = 0; + + /* Request and verify all valid register sets. */ + /* TODO: BUILD TIME CHECK: TEST_ASSERT(KVM_SYNC_X86_NUM_FIELDS != 3); */ + run->kvm_valid_regs = TEST_SYNC_FIELDS; + rv = _vcpu_run(vcpu); + TEST_ASSERT(run->exit_reason == KVM_EXIT_IO, + "Unexpected exit reason: %u (%s),\n", + run->exit_reason, + exit_reason_str(run->exit_reason)); + + vcpu_regs_get(vcpu, ®s); + compare_regs(®s, &run->s.regs.regs); + + vcpu_sregs_get(vcpu, &sregs); + compare_sregs(&sregs, &run->s.regs.sregs); + + vcpu_events_get(vcpu, &events); + compare_vcpu_events(&events, &run->s.regs.events); + + /* Set and verify various register values. */ + run->s.regs.regs.rbx = 0xBAD1DEA; + run->s.regs.sregs.apic_base = 1 << 11; + /* TODO run->s.regs.events.XYZ = ABC; */ + + run->kvm_valid_regs = TEST_SYNC_FIELDS; + run->kvm_dirty_regs = KVM_SYNC_X86_REGS | KVM_SYNC_X86_SREGS; + rv = _vcpu_run(vcpu); + TEST_ASSERT(run->exit_reason == KVM_EXIT_IO, + "Unexpected exit reason: %u (%s),\n", + run->exit_reason, + exit_reason_str(run->exit_reason)); + TEST_ASSERT(run->s.regs.regs.rbx == 0xBAD1DEA + 1, + "rbx sync regs value incorrect 0x%llx.", + run->s.regs.regs.rbx); + TEST_ASSERT(run->s.regs.sregs.apic_base == 1 << 11, + "apic_base sync regs value incorrect 0x%llx.", + run->s.regs.sregs.apic_base); + + vcpu_regs_get(vcpu, ®s); + compare_regs(®s, &run->s.regs.regs); + + vcpu_sregs_get(vcpu, &sregs); + compare_sregs(&sregs, &run->s.regs.sregs); + + vcpu_events_get(vcpu, &events); + compare_vcpu_events(&events, &run->s.regs.events); + + /* Clear kvm_dirty_regs bits, verify new s.regs values are + * overwritten with existing guest values. + */ + run->kvm_valid_regs = TEST_SYNC_FIELDS; + run->kvm_dirty_regs = 0; + run->s.regs.regs.rbx = 0xDEADBEEF; + rv = _vcpu_run(vcpu); + TEST_ASSERT(run->exit_reason == KVM_EXIT_IO, + "Unexpected exit reason: %u (%s),\n", + run->exit_reason, + exit_reason_str(run->exit_reason)); + TEST_ASSERT(run->s.regs.regs.rbx != 0xDEADBEEF, + "rbx sync regs value incorrect 0x%llx.", + run->s.regs.regs.rbx); + + /* Clear kvm_valid_regs bits and kvm_dirty_bits. + * Verify s.regs values are not overwritten with existing guest values + * and that guest values are not overwritten with kvm_sync_regs values. + */ + run->kvm_valid_regs = 0; + run->kvm_dirty_regs = 0; + run->s.regs.regs.rbx = 0xAAAA; + regs.rbx = 0xBAC0; + vcpu_regs_set(vcpu, ®s); + rv = _vcpu_run(vcpu); + TEST_ASSERT(run->exit_reason == KVM_EXIT_IO, + "Unexpected exit reason: %u (%s),\n", + run->exit_reason, + exit_reason_str(run->exit_reason)); + TEST_ASSERT(run->s.regs.regs.rbx == 0xAAAA, + "rbx sync regs value incorrect 0x%llx.", + run->s.regs.regs.rbx); + vcpu_regs_get(vcpu, ®s); + TEST_ASSERT(regs.rbx == 0xBAC0 + 1, + "rbx guest value incorrect 0x%llx.", + regs.rbx); + + /* Clear kvm_valid_regs bits. Verify s.regs values are not overwritten + * with existing guest values but that guest values are overwritten + * with kvm_sync_regs values. + */ + run->kvm_valid_regs = 0; + run->kvm_dirty_regs = TEST_SYNC_FIELDS; + run->s.regs.regs.rbx = 0xBBBB; + rv = _vcpu_run(vcpu); + TEST_ASSERT(run->exit_reason == KVM_EXIT_IO, + "Unexpected exit reason: %u (%s),\n", + run->exit_reason, + exit_reason_str(run->exit_reason)); + TEST_ASSERT(run->s.regs.regs.rbx == 0xBBBB, + "rbx sync regs value incorrect 0x%llx.", + run->s.regs.regs.rbx); + vcpu_regs_get(vcpu, ®s); + TEST_ASSERT(regs.rbx == 0xBBBB + 1, + "rbx guest value incorrect 0x%llx.", + regs.rbx); + + kvm_vm_free(vm); + + return 0; +} -- cgit v1.2.3