Please pull a set of selftests updates for 6.2. Many of these changes are prep work for future selftests, e.g. for SEV and TDX, and/or have myriad conflicts, e.g. the former "perf util" code. I am hoping to get these changes queued up for 6.2 sooner than later so that the chain of dependent work doesn't get too long. Except for the ARM single-step changes[*], everything has been posted for quite some time and/or has gone through multiple rounds of review. The ARM single-step changes are a last minute fix to resolve a hilarious (IMO) collision between the pool-based ucall implementation and the recently added single-step test. Turns out that GCC will generate older flavors of atomics that rely on a monitor to detect conflicts, and that monitor is cleared by eret. gdb is allegedly smart enough to skip over atomic sequences, but our selftest... not so much. Note, there's one KVM x86 patch hiding in here (cleanup for code that gets copied into selftests), but its quite innocuous and shouldn't conflict with anything. Regarding the "perf util" conflicts, I'm mostly certain I got them right, but it wouldn't be a bad idea for the folks involved (Cc'd) to double check that the end result looks correct. [*] https://lore.kernel.org/all/20221117002350.2178351-1-seanjc@xxxxxxxxxx The following changes since commit d663b8a285986072428a6a145e5994bc275df994: KVM: replace direct irq.h inclusion (2022-11-09 12:31:37 -0500) are available in the Git repository at: https://github.com/kvm-x86/linux tags/kvm-selftests-6.2-1 for you to fetch changes up to 5c107f7085f45e071bbcf13006fffccd8e5de0e1: KVM: selftests: Assert in prepare_eptp() that nEPT is supported (2022-11-16 16:59:07 -0800) ---------------------------------------------------------------- KVM selftests updates for 6.2 perf_util: - Add support for pinning vCPUs in dirty_log_perf_test. - Add a lightweight psuedo RNG for guest use, and use it to randomize the access pattern and write vs. read percentage in the so called "perf util" tests. - Rename the so called "perf_util" framework to "memstress". ucall: - Add a common pool-based ucall implementation (code dedup and pre-work for running SEV (and beyond) guests in selftests. - Fix an issue in ARM's single-step test when using the new pool-based implementation; atomics don't play nice with single-step exceptions. init: - Provide a common constructor and arch hook, which will eventually be used by x86 to automatically select the right hypercall (AMD vs. Intel). x86: - Clean up x86's page tabe management. - Clean up and enhance the "smaller maxphyaddr" test, and add a related test to cover generic emulation failure. - Clean up the nEPT support checks. - Add X86_PROPERTY_* framework to retrieve multi-bit CPUID values. ---------------------------------------------------------------- Colin Ian King (1): KVM: selftests: Fix spelling mistake "begining" -> "beginning" Colton Lewis (4): KVM: selftests: implement random number generator for guest code KVM: selftests: create -r argument to specify random seed KVM: selftests: randomize which pages are written vs read KVM: selftests: randomize page access order David Matlack (13): KVM: selftests: Rename perf_test_util.[ch] to memstress.[ch] KVM: selftests: Rename pta (short for perf_test_args) to args KVM: selftests: Rename perf_test_util symbols to memstress KVM: selftests: Rename emulator_error_test to smaller_maxphyaddr_emulation_test KVM: selftests: Explicitly require instructions bytes KVM: selftests: Delete dead ucall code KVM: selftests: Move flds instruction emulation failure handling to header KVM: x86/mmu: Use BIT{,_ULL}() for PFERR masks KVM: selftests: Copy KVM PFERR masks into selftests KVM: selftests: Expect #PF(RSVD) when TDP is disabled KVM: selftests: Add a test for KVM_CAP_EXIT_ON_EMULATION_FAILURE KVM: selftests: Check for KVM nEPT support using "feature" MSRs KVM: selftests: Assert in prepare_eptp() that nEPT is supported Gautam Menghani (1): KVM: selftests: Don't assume vcpu->id is '0' in xAPIC state test Peter Gonda (2): tools: Add atomic_test_and_set_bit() KVM: selftests: Add ucall pool based implementation Sean Christopherson (28): KVM: arm64: selftests: Disable single-step with correct KVM define KVM: arm64: selftests: Disable single-step without relying on ucall() KVM: selftests: Consolidate common code for populating ucall struct KVM: selftests: Consolidate boilerplate code in get_ucall() KVM: selftests: Automatically do init_ucall() for non-barebones VMs KVM: selftests: Make arm64's MMIO ucall multi-VM friendly KVM: selftests: Drop now-unnecessary ucall_uninit() KVM: selftests: Drop helpers to read/write page table entries KVM: selftests: Drop reserved bit checks from PTE accessor KVM: selftests: Remove useless shifts when creating guest page tables KVM: selftests: Verify parent PTE is PRESENT when getting child PTE KVM: selftests: Use virt_get_pte() when getting PTE pointer KVM: selftests: Use vm_get_page_table_entry() in addr_arch_gva2gpa() KVM: selftests: Play nice with huge pages when getting PTEs/GPAs KVM: selftests: Avoid JMP in non-faulting path of KVM_ASM_SAFE() KVM: selftests: Provide error code as a KVM_ASM_SAFE() output KVM: selftests: Add X86_FEATURE_PAE and use it calc "fallback" MAXPHYADDR KVM: selftests: Refactor X86_FEATURE_* framework to prep for X86_PROPERTY_* KVM: selftests: Add X86_PROPERTY_* framework to retrieve CPUID values KVM: selftests: Use X86_PROPERTY_MAX_KVM_LEAF in CPUID test KVM: selftests: Refactor kvm_cpuid_has() to prep for X86_PROPERTY_* support KVM: selftests: Add kvm_cpu_*() support for X86_PROPERTY_* KVM: selftests: Convert AMX test to use X86_PROPRETY_XXX KVM: selftests: Convert vmx_pmu_caps_test to use X86_PROPERTY_* KVM: selftests: Add PMU feature framework, use in PMU event filter test KVM: selftests: Add dedicated helpers for getting x86 Family and Model KVM: selftests: Add and use KVM helpers for x86 Family and Model KVM: selftests: Drop helpers for getting specific KVM supported CPUID entry Vipin Sharma (7): KVM: selftests: Add missing break between -e and -g option in dirty_log_perf_test KVM: selftests: Put command line options in alphabetical order in dirty_log_perf_test KVM: selftests: Add atoi_paranoid() to catch errors missed by atoi() KVM: selftests: Use SZ_* macros from sizes.h in max_guest_memory_test.c KVM: selftests: Shorten the test args in memslot_modification_stress_test.c KVM: selftests: Add atoi_positive() and atoi_non_negative() for input validation KVM: selftests: Allowing running dirty_log_perf_test on specific CPUs Vishal Annapurve (3): KVM: selftests: move common startup logic to kvm_util.c KVM: selftests: Add arch specific initialization KVM: selftests: Add arch specific post vm creation hook arch/x86/include/asm/kvm_host.h | 20 +++--- tools/arch/x86/include/asm/atomic.h | 7 ++ tools/include/asm-generic/atomic-gcc.h | 12 ++++ tools/testing/selftests/kvm/.gitignore | 3 +- tools/testing/selftests/kvm/Makefile | 8 ++- tools/testing/selftests/kvm/aarch64/aarch32_id_regs.c | 3 - tools/testing/selftests/kvm/aarch64/arch_timer.c | 29 ++------ tools/testing/selftests/kvm/aarch64/debug-exceptions.c | 32 ++++----- tools/testing/selftests/kvm/aarch64/hypercalls.c | 3 - tools/testing/selftests/kvm/aarch64/psci_test.c | 1 - tools/testing/selftests/kvm/aarch64/vgic_init.c | 2 - tools/testing/selftests/kvm/aarch64/vgic_irq.c | 10 +-- tools/testing/selftests/kvm/access_tracking_perf_test.c | 22 +++--- tools/testing/selftests/kvm/demand_paging_test.c | 24 +++---- tools/testing/selftests/kvm/dirty_log_perf_test.c | 130 ++++++++++++++++++++++----------- tools/testing/selftests/kvm/dirty_log_test.c | 3 - tools/testing/selftests/kvm/include/kvm_util_base.h | 28 ++++++++ tools/testing/selftests/kvm/include/memstress.h | 72 +++++++++++++++++++ tools/testing/selftests/kvm/include/perf_test_util.h | 63 ---------------- tools/testing/selftests/kvm/include/test_util.h | 25 +++++++ tools/testing/selftests/kvm/include/ucall_common.h | 10 ++- tools/testing/selftests/kvm/include/x86_64/processor.h | 364 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++------------------- tools/testing/selftests/kvm/include/x86_64/vmx.h | 2 +- tools/testing/selftests/kvm/kvm_page_table_test.c | 6 +- tools/testing/selftests/kvm/lib/aarch64/processor.c | 18 ++--- tools/testing/selftests/kvm/lib/aarch64/ucall.c | 102 ++++---------------------- tools/testing/selftests/kvm/lib/elf.c | 2 +- tools/testing/selftests/kvm/lib/kvm_util.c | 85 +++++++++++++++++++++- tools/testing/selftests/kvm/lib/{perf_test_util.c => memstress.c} | 133 ++++++++++++++++++++-------------- tools/testing/selftests/kvm/lib/riscv/ucall.c | 42 ++--------- tools/testing/selftests/kvm/lib/s390x/ucall.c | 39 ++-------- tools/testing/selftests/kvm/lib/test_util.c | 36 ++++++++++ tools/testing/selftests/kvm/lib/ucall_common.c | 103 ++++++++++++++++++++++++++ tools/testing/selftests/kvm/lib/x86_64/{perf_test_util.c => memstress.c} | 37 +++++----- tools/testing/selftests/kvm/lib/x86_64/processor.c | 225 +++++++++++++++++++++++---------------------------------- tools/testing/selftests/kvm/lib/x86_64/ucall.c | 39 ++-------- tools/testing/selftests/kvm/lib/x86_64/vmx.c | 12 ++-- tools/testing/selftests/kvm/max_guest_memory_test.c | 21 +++--- tools/testing/selftests/kvm/memslot_modification_stress_test.c | 38 +++++----- tools/testing/selftests/kvm/memslot_perf_test.c | 28 ++------ tools/testing/selftests/kvm/rseq_test.c | 4 -- tools/testing/selftests/kvm/s390x/memop.c | 2 - tools/testing/selftests/kvm/s390x/resets.c | 2 - tools/testing/selftests/kvm/s390x/sync_regs_test.c | 3 - tools/testing/selftests/kvm/set_memory_region_test.c | 5 +- tools/testing/selftests/kvm/steal_time.c | 1 - tools/testing/selftests/kvm/system_counter_offset_test.c | 1 - tools/testing/selftests/kvm/x86_64/amx_test.c | 105 +++++++-------------------- tools/testing/selftests/kvm/x86_64/cpuid_test.c | 11 +-- tools/testing/selftests/kvm/x86_64/cr4_cpuid_sync_test.c | 3 - tools/testing/selftests/kvm/x86_64/emulator_error_test.c | 193 ------------------------------------------------- tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c | 45 ++++++++++++ tools/testing/selftests/kvm/x86_64/flds_emulation.h | 55 ++++++++++++++ tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c | 3 - tools/testing/selftests/kvm/x86_64/hyperv_features.c | 3 +- tools/testing/selftests/kvm/x86_64/nx_huge_pages_test.c | 5 +- tools/testing/selftests/kvm/x86_64/platform_info_test.c | 3 - tools/testing/selftests/kvm/x86_64/pmu_event_filter_test.c | 77 +++++--------------- tools/testing/selftests/kvm/x86_64/set_sregs_test.c | 3 - tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c | 111 ++++++++++++++++++++++++++++ tools/testing/selftests/kvm/x86_64/svm_nested_soft_inject_test.c | 3 - tools/testing/selftests/kvm/x86_64/sync_regs_test.c | 3 - tools/testing/selftests/kvm/x86_64/userspace_io_test.c | 3 - tools/testing/selftests/kvm/x86_64/userspace_msr_exit_test.c | 3 - tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c | 1 + tools/testing/selftests/kvm/x86_64/vmx_pmu_caps_test.c | 19 +---- tools/testing/selftests/kvm/x86_64/xapic_state_test.c | 4 +- 67 files changed, 1353 insertions(+), 1157 deletions(-) create mode 100644 tools/testing/selftests/kvm/include/memstress.h delete mode 100644 tools/testing/selftests/kvm/include/perf_test_util.h rename tools/testing/selftests/kvm/lib/{perf_test_util.c => memstress.c} (63%) create mode 100644 tools/testing/selftests/kvm/lib/ucall_common.c rename tools/testing/selftests/kvm/lib/x86_64/{perf_test_util.c => memstress.c} (68%) delete mode 100644 tools/testing/selftests/kvm/x86_64/emulator_error_test.c create mode 100644 tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c create mode 100644 tools/testing/selftests/kvm/x86_64/flds_emulation.h create mode 100644 tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c
