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author | Linus Torvalds <torvalds@linux-foundation.org> | 2022-08-05 00:59:54 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-08-05 00:59:54 +0300 |
commit | 7c5c3a6177fa9646884114fc7f2e970b0bc50dc9 (patch) | |
tree | 956857522574ae7cb07d2227dc16e53d7e9e00e7 /tools/testing/selftests/kvm/kvm_binary_stats_test.c | |
parent | f0a892f599c46af673e47418c47c15e69a7b67f4 (diff) | |
parent | 281106f938d3daaea6f8b6723a8217a2a1ef6936 (diff) | |
download | linux-7c5c3a6177fa9646884114fc7f2e970b0bc50dc9.tar.xz |
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm updates from Paolo Bonzini:
"Quite a large pull request due to a selftest API overhaul and some
patches that had come in too late for 5.19.
ARM:
- Unwinder implementations for both nVHE modes (classic and
protected), complete with an overflow stack
- Rework of the sysreg access from userspace, with a complete rewrite
of the vgic-v3 view to allign with the rest of the infrastructure
- Disagregation of the vcpu flags in separate sets to better track
their use model.
- A fix for the GICv2-on-v3 selftest
- A small set of cosmetic fixes
RISC-V:
- Track ISA extensions used by Guest using bitmap
- Added system instruction emulation framework
- Added CSR emulation framework
- Added gfp_custom flag in struct kvm_mmu_memory_cache
- Added G-stage ioremap() and iounmap() functions
- Added support for Svpbmt inside Guest
s390:
- add an interface to provide a hypervisor dump for secure guests
- improve selftests to use TAP interface
- enable interpretive execution of zPCI instructions (for PCI
passthrough)
- First part of deferred teardown
- CPU Topology
- PV attestation
- Minor fixes
x86:
- Permit guests to ignore single-bit ECC errors
- Intel IPI virtualization
- Allow getting/setting pending triple fault with
KVM_GET/SET_VCPU_EVENTS
- PEBS virtualization
- Simplify PMU emulation by just using PERF_TYPE_RAW events
- More accurate event reinjection on SVM (avoid retrying
instructions)
- Allow getting/setting the state of the speaker port data bit
- Refuse starting the kvm-intel module if VM-Entry/VM-Exit controls
are inconsistent
- "Notify" VM exit (detect microarchitectural hangs) for Intel
- Use try_cmpxchg64 instead of cmpxchg64
- Ignore benign host accesses to PMU MSRs when PMU is disabled
- Allow disabling KVM's "MONITOR/MWAIT are NOPs!" behavior
- Allow NX huge page mitigation to be disabled on a per-vm basis
- Port eager page splitting to shadow MMU as well
- Enable CMCI capability by default and handle injected UCNA errors
- Expose pid of vcpu threads in debugfs
- x2AVIC support for AMD
- cleanup PIO emulation
- Fixes for LLDT/LTR emulation
- Don't require refcounted "struct page" to create huge SPTEs
- Miscellaneous cleanups:
- MCE MSR emulation
- Use separate namespaces for guest PTEs and shadow PTEs bitmasks
- PIO emulation
- Reorganize rmap API, mostly around rmap destruction
- Do not workaround very old KVM bugs for L0 that runs with nesting enabled
- new selftests API for CPUID
Generic:
- Fix races in gfn->pfn cache refresh; do not pin pages tracked by
the cache
- new selftests API using struct kvm_vcpu instead of a (vm, id)
tuple"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (606 commits)
selftests: kvm: set rax before vmcall
selftests: KVM: Add exponent check for boolean stats
selftests: KVM: Provide descriptive assertions in kvm_binary_stats_test
selftests: KVM: Check stat name before other fields
KVM: x86/mmu: remove unused variable
RISC-V: KVM: Add support for Svpbmt inside Guest/VM
RISC-V: KVM: Use PAGE_KERNEL_IO in kvm_riscv_gstage_ioremap()
RISC-V: KVM: Add G-stage ioremap() and iounmap() functions
KVM: Add gfp_custom flag in struct kvm_mmu_memory_cache
RISC-V: KVM: Add extensible CSR emulation framework
RISC-V: KVM: Add extensible system instruction emulation framework
RISC-V: KVM: Factor-out instruction emulation into separate sources
RISC-V: KVM: move preempt_disable() call in kvm_arch_vcpu_ioctl_run
RISC-V: KVM: Make kvm_riscv_guest_timer_init a void function
RISC-V: KVM: Fix variable spelling mistake
RISC-V: KVM: Improve ISA extension by using a bitmap
KVM, x86/mmu: Fix the comment around kvm_tdp_mmu_zap_leafs()
KVM: SVM: Dump Virtual Machine Save Area (VMSA) to klog
KVM: x86/mmu: Treat NX as a valid SPTE bit for NPT
KVM: x86: Do not block APIC write for non ICR registers
...
Diffstat (limited to 'tools/testing/selftests/kvm/kvm_binary_stats_test.c')
-rw-r--r-- | tools/testing/selftests/kvm/kvm_binary_stats_test.c | 183 |
1 files changed, 94 insertions, 89 deletions
diff --git a/tools/testing/selftests/kvm/kvm_binary_stats_test.c b/tools/testing/selftests/kvm/kvm_binary_stats_test.c index 17f65d514915..0b45ac593387 100644 --- a/tools/testing/selftests/kvm/kvm_binary_stats_test.c +++ b/tools/testing/selftests/kvm/kvm_binary_stats_test.c @@ -26,163 +26,167 @@ static void stats_test(int stats_fd) int i; size_t size_desc; size_t size_data = 0; - struct kvm_stats_header *header; + struct kvm_stats_header header; char *id; struct kvm_stats_desc *stats_desc; u64 *stats_data; struct kvm_stats_desc *pdesc; + u32 type, unit, base; /* Read kvm stats header */ - header = malloc(sizeof(*header)); - TEST_ASSERT(header, "Allocate memory for stats header"); + read_stats_header(stats_fd, &header); - ret = read(stats_fd, header, sizeof(*header)); - TEST_ASSERT(ret == sizeof(*header), "Read stats header"); - size_desc = sizeof(*stats_desc) + header->name_size; + size_desc = get_stats_descriptor_size(&header); /* Read kvm stats id string */ - id = malloc(header->name_size); + id = malloc(header.name_size); TEST_ASSERT(id, "Allocate memory for id string"); - ret = read(stats_fd, id, header->name_size); - TEST_ASSERT(ret == header->name_size, "Read id string"); + + ret = read(stats_fd, id, header.name_size); + TEST_ASSERT(ret == header.name_size, "Read id string"); /* Check id string, that should start with "kvm" */ - TEST_ASSERT(!strncmp(id, "kvm", 3) && strlen(id) < header->name_size, - "Invalid KVM stats type, id: %s", id); + TEST_ASSERT(!strncmp(id, "kvm", 3) && strlen(id) < header.name_size, + "Invalid KVM stats type, id: %s", id); /* Sanity check for other fields in header */ - if (header->num_desc == 0) { + if (header.num_desc == 0) { printf("No KVM stats defined!"); return; } - /* Check overlap */ - TEST_ASSERT(header->desc_offset > 0 && header->data_offset > 0 - && header->desc_offset >= sizeof(*header) - && header->data_offset >= sizeof(*header), - "Invalid offset fields in header"); - TEST_ASSERT(header->desc_offset > header->data_offset || - (header->desc_offset + size_desc * header->num_desc <= - header->data_offset), - "Descriptor block is overlapped with data block"); - - /* Allocate memory for stats descriptors */ - stats_desc = calloc(header->num_desc, size_desc); - TEST_ASSERT(stats_desc, "Allocate memory for stats descriptors"); + /* + * The descriptor and data offsets must be valid, they must not overlap + * the header, and the descriptor and data blocks must not overlap each + * other. Note, the data block is rechecked after its size is known. + */ + TEST_ASSERT(header.desc_offset && header.desc_offset >= sizeof(header) && + header.data_offset && header.data_offset >= sizeof(header), + "Invalid offset fields in header"); + + TEST_ASSERT(header.desc_offset > header.data_offset || + (header.desc_offset + size_desc * header.num_desc <= header.data_offset), + "Descriptor block is overlapped with data block"); + /* Read kvm stats descriptors */ - ret = pread(stats_fd, stats_desc, - size_desc * header->num_desc, header->desc_offset); - TEST_ASSERT(ret == size_desc * header->num_desc, - "Read KVM stats descriptors"); + stats_desc = read_stats_descriptors(stats_fd, &header); /* Sanity check for fields in descriptors */ - for (i = 0; i < header->num_desc; ++i) { - pdesc = (void *)stats_desc + i * size_desc; + for (i = 0; i < header.num_desc; ++i) { + pdesc = get_stats_descriptor(stats_desc, i, &header); + type = pdesc->flags & KVM_STATS_TYPE_MASK; + unit = pdesc->flags & KVM_STATS_UNIT_MASK; + base = pdesc->flags & KVM_STATS_BASE_MASK; + + /* Check name string */ + TEST_ASSERT(strlen(pdesc->name) < header.name_size, + "KVM stats name (index: %d) too long", i); + /* Check type,unit,base boundaries */ - TEST_ASSERT((pdesc->flags & KVM_STATS_TYPE_MASK) - <= KVM_STATS_TYPE_MAX, "Unknown KVM stats type"); - TEST_ASSERT((pdesc->flags & KVM_STATS_UNIT_MASK) - <= KVM_STATS_UNIT_MAX, "Unknown KVM stats unit"); - TEST_ASSERT((pdesc->flags & KVM_STATS_BASE_MASK) - <= KVM_STATS_BASE_MAX, "Unknown KVM stats base"); - /* Check exponent for stats unit + TEST_ASSERT(type <= KVM_STATS_TYPE_MAX, + "Unknown KVM stats (%s) type: %u", pdesc->name, type); + TEST_ASSERT(unit <= KVM_STATS_UNIT_MAX, + "Unknown KVM stats (%s) unit: %u", pdesc->name, unit); + TEST_ASSERT(base <= KVM_STATS_BASE_MAX, + "Unknown KVM stats (%s) base: %u", pdesc->name, base); + + /* + * Check exponent for stats unit * Exponent for counter should be greater than or equal to 0 * Exponent for unit bytes should be greater than or equal to 0 * Exponent for unit seconds should be less than or equal to 0 * Exponent for unit clock cycles should be greater than or * equal to 0 + * Exponent for unit boolean should be 0 */ switch (pdesc->flags & KVM_STATS_UNIT_MASK) { case KVM_STATS_UNIT_NONE: case KVM_STATS_UNIT_BYTES: case KVM_STATS_UNIT_CYCLES: TEST_ASSERT(pdesc->exponent >= 0, - "Unsupported KVM stats unit"); + "Unsupported KVM stats (%s) exponent: %i", + pdesc->name, pdesc->exponent); break; case KVM_STATS_UNIT_SECONDS: TEST_ASSERT(pdesc->exponent <= 0, - "Unsupported KVM stats unit"); + "Unsupported KVM stats (%s) exponent: %i", + pdesc->name, pdesc->exponent); + break; + case KVM_STATS_UNIT_BOOLEAN: + TEST_ASSERT(pdesc->exponent == 0, + "Unsupported KVM stats (%s) exponent: %d", + pdesc->name, pdesc->exponent); break; } - /* Check name string */ - TEST_ASSERT(strlen(pdesc->name) < header->name_size, - "KVM stats name(%s) too long", pdesc->name); + /* Check size field, which should not be zero */ - TEST_ASSERT(pdesc->size, "KVM descriptor(%s) with size of 0", - pdesc->name); + TEST_ASSERT(pdesc->size, + "KVM descriptor(%s) with size of 0", pdesc->name); /* Check bucket_size field */ switch (pdesc->flags & KVM_STATS_TYPE_MASK) { case KVM_STATS_TYPE_LINEAR_HIST: TEST_ASSERT(pdesc->bucket_size, - "Bucket size of Linear Histogram stats (%s) is zero", - pdesc->name); + "Bucket size of Linear Histogram stats (%s) is zero", + pdesc->name); break; default: TEST_ASSERT(!pdesc->bucket_size, - "Bucket size of stats (%s) is not zero", - pdesc->name); + "Bucket size of stats (%s) is not zero", + pdesc->name); } size_data += pdesc->size * sizeof(*stats_data); } - /* Check overlap */ - TEST_ASSERT(header->data_offset >= header->desc_offset - || header->data_offset + size_data <= header->desc_offset, - "Data block is overlapped with Descriptor block"); + + /* + * Now that the size of the data block is known, verify the data block + * doesn't overlap the descriptor block. + */ + TEST_ASSERT(header.data_offset >= header.desc_offset || + header.data_offset + size_data <= header.desc_offset, + "Data block is overlapped with Descriptor block"); + /* Check validity of all stats data size */ - TEST_ASSERT(size_data >= header->num_desc * sizeof(*stats_data), - "Data size is not correct"); + TEST_ASSERT(size_data >= header.num_desc * sizeof(*stats_data), + "Data size is not correct"); + /* Check stats offset */ - for (i = 0; i < header->num_desc; ++i) { - pdesc = (void *)stats_desc + i * size_desc; + for (i = 0; i < header.num_desc; ++i) { + pdesc = get_stats_descriptor(stats_desc, i, &header); TEST_ASSERT(pdesc->offset < size_data, - "Invalid offset (%u) for stats: %s", - pdesc->offset, pdesc->name); + "Invalid offset (%u) for stats: %s", + pdesc->offset, pdesc->name); } /* Allocate memory for stats data */ stats_data = malloc(size_data); TEST_ASSERT(stats_data, "Allocate memory for stats data"); /* Read kvm stats data as a bulk */ - ret = pread(stats_fd, stats_data, size_data, header->data_offset); + ret = pread(stats_fd, stats_data, size_data, header.data_offset); TEST_ASSERT(ret == size_data, "Read KVM stats data"); /* Read kvm stats data one by one */ - size_data = 0; - for (i = 0; i < header->num_desc; ++i) { - pdesc = (void *)stats_desc + i * size_desc; - ret = pread(stats_fd, stats_data, - pdesc->size * sizeof(*stats_data), - header->data_offset + size_data); - TEST_ASSERT(ret == pdesc->size * sizeof(*stats_data), - "Read data of KVM stats: %s", pdesc->name); - size_data += pdesc->size * sizeof(*stats_data); + for (i = 0; i < header.num_desc; ++i) { + pdesc = get_stats_descriptor(stats_desc, i, &header); + read_stat_data(stats_fd, &header, pdesc, stats_data, + pdesc->size); } free(stats_data); free(stats_desc); free(id); - free(header); } static void vm_stats_test(struct kvm_vm *vm) { - int stats_fd; - - /* Get fd for VM stats */ - stats_fd = vm_get_stats_fd(vm); - TEST_ASSERT(stats_fd >= 0, "Get VM stats fd"); + int stats_fd = vm_get_stats_fd(vm); stats_test(stats_fd); close(stats_fd); TEST_ASSERT(fcntl(stats_fd, F_GETFD) == -1, "Stats fd not freed"); } -static void vcpu_stats_test(struct kvm_vm *vm, int vcpu_id) +static void vcpu_stats_test(struct kvm_vcpu *vcpu) { - int stats_fd; - - /* Get fd for VCPU stats */ - stats_fd = vcpu_get_stats_fd(vm, vcpu_id); - TEST_ASSERT(stats_fd >= 0, "Get VCPU stats fd"); + int stats_fd = vcpu_get_stats_fd(vcpu); stats_test(stats_fd); close(stats_fd); @@ -203,6 +207,7 @@ static void vcpu_stats_test(struct kvm_vm *vm, int vcpu_id) int main(int argc, char *argv[]) { int i, j; + struct kvm_vcpu **vcpus; struct kvm_vm **vms; int max_vm = DEFAULT_NUM_VM; int max_vcpu = DEFAULT_NUM_VCPU; @@ -220,26 +225,26 @@ int main(int argc, char *argv[]) } /* Check the extension for binary stats */ - if (kvm_check_cap(KVM_CAP_BINARY_STATS_FD) <= 0) { - print_skip("Binary form statistics interface is not supported"); - exit(KSFT_SKIP); - } + TEST_REQUIRE(kvm_has_cap(KVM_CAP_BINARY_STATS_FD)); /* Create VMs and VCPUs */ vms = malloc(sizeof(vms[0]) * max_vm); TEST_ASSERT(vms, "Allocate memory for storing VM pointers"); + + vcpus = malloc(sizeof(struct kvm_vcpu *) * max_vm * max_vcpu); + TEST_ASSERT(vcpus, "Allocate memory for storing vCPU pointers"); + for (i = 0; i < max_vm; ++i) { - vms[i] = vm_create(VM_MODE_DEFAULT, - DEFAULT_GUEST_PHY_PAGES, O_RDWR); + vms[i] = vm_create_barebones(); for (j = 0; j < max_vcpu; ++j) - vm_vcpu_add(vms[i], j); + vcpus[i * max_vcpu + j] = __vm_vcpu_add(vms[i], j); } /* Check stats read for every VM and VCPU */ for (i = 0; i < max_vm; ++i) { vm_stats_test(vms[i]); for (j = 0; j < max_vcpu; ++j) - vcpu_stats_test(vms[i], j); + vcpu_stats_test(vcpus[i * max_vcpu + j]); } for (i = 0; i < max_vm; ++i) |