Linus, The following changes since commit fec50db7033ea478773b159e0e2efb135270e3b7: Linux 6.9-rc3 (2024-04-07 13:22:46 -0700) are available in the Git repository at: https://git.kernel.org/pub/scm/virt/kvm/kvm.git tags/for-linus for you to fetch changes up to 44ecfa3e5f1ce2b5c7fa7003abde8a667c158f88: Merge branch 'svm' of https://github.com/kvm-x86/linux into HEAD (2024-04-17 11:44:37 -0400) This is a bit on the large side, mostly due to two parts of the pull request: * changes to disable some broken PMU virtualization * a clean up to SVM's enter/exit assembly code so that it can be compiled without OBJECT_FILES_NON_STANDARD, fixing a warning that appeared in 6.9-rc1. Everything else is small bugfixes and selftest changes. ---------------------------------------------------------------- * Clean up SVM's enter/exit assembly code so that it can be compiled without OBJECT_FILES_NON_STANDARD. This fixes a warning "Unpatched return thunk in use. This should not happen!" when running KVM selftests. * Fix a mostly benign bug in the gfn_to_pfn_cache infrastructure where KVM would allow userspace to refresh the cache with a bogus GPA. The bug has existed for quite some time, but was exposed by a new sanity check added in 6.9 (to ensure a cache is either GPA-based or HVA-based). * Drop an unused param from gfn_to_pfn_cache_invalidate_start() that got left behind during a 6.9 cleanup. * Fix a math goof in x86's hugepage logic for KVM_SET_MEMORY_ATTRIBUTES that results in an array overflow (detected by KASAN). * Fix a bug where KVM incorrectly clears root_role.direct when userspace sets guest CPUID. * Fix a dirty logging bug in the where KVM fails to write-protect SPTEs used by a nested guest, if KVM is using Page-Modification Logging and the nested hypervisor is NOT using EPT. x86 PMU: * Drop support for virtualizing adaptive PEBS, as KVM's implementation is architecturally broken without an obvious/easy path forward, and because exposing adaptive PEBS can leak host LBRs to the guest, i.e. can leak host kernel addresses to the guest. * Set the enable bits for general purpose counters in PERF_GLOBAL_CTRL at RESET time, as done by both Intel and AMD processors. * Disable LBR virtualization on CPUs that don't support LBR callstacks, as KVM unconditionally uses PERF_SAMPLE_BRANCH_CALL_STACK when creating the perf event, and would fail on such CPUs. Tests: * Fix a flaw in the max_guest_memory selftest that results in it exhausting the supply of ucall structures when run with more than 256 vCPUs. * Mark KVM_MEM_READONLY as supported for RISC-V in set_memory_region_test. ---------------------------------------------------------------- Andrew Jones (1): KVM: selftests: fix supported_flags for riscv Christophe JAILLET (1): KVM: SVM: Remove a useless zeroing of allocated memory David Matlack (4): KVM: x86/mmu: Write-protect L2 SPTEs in TDP MMU when clearing dirty status KVM: x86/mmu: Remove function comments above clear_dirty_{gfn_range,pt_masked}() KVM: x86/mmu: Fix and clarify comments about clearing D-bit vs. write-protecting KVM: selftests: Add coverage of EPT-disabled to vmx_dirty_log_test Maxim Levitsky (1): KVM: selftests: fix max_guest_memory_test with more that 256 vCPUs Paolo Bonzini (2): Merge tag 'kvm-x86-fixes-6.9-rcN' of https://github.com/kvm-x86/linux into HEAD Merge branch 'svm' of https://github.com/kvm-x86/linux into HEAD Rick Edgecombe (1): KVM: x86/mmu: x86: Don't overflow lpage_info when checking attributes Sandipan Das (1): KVM: x86/pmu: Do not mask LVTPC when handling a PMI on AMD platforms Sean Christopherson (20): KVM: Add helpers to consolidate gfn_to_pfn_cache's page split check KVM: Check validity of offset+length of gfn_to_pfn_cache prior to activation KVM: Explicitly disallow activatating a gfn_to_pfn_cache with INVALID_GPA KVM: x86/pmu: Disable support for adaptive PEBS KVM: x86/pmu: Set enable bits for GP counters in PERF_GLOBAL_CTRL at "RESET" KVM: selftests: Verify post-RESET value of PERF_GLOBAL_CTRL in PMCs test KVM: SVM: Create a stack frame in __svm_vcpu_run() for unwinding KVM: SVM: Wrap __svm_sev_es_vcpu_run() with #ifdef CONFIG_KVM_AMD_SEV KVM: SVM: Drop 32-bit "support" from __svm_sev_es_vcpu_run() KVM: SVM: Clobber RAX instead of RBX when discarding spec_ctrl_intercepted KVM: SVM: Save/restore non-volatile GPRs in SEV-ES VMRUN via host save area KVM: SVM: Save/restore args across SEV-ES VMRUN via host save area KVM: SVM: Create a stack frame in __svm_sev_es_vcpu_run() KVM: x86: Stop compiling vmenter.S with OBJECT_FILES_NON_STANDARD KVM: x86: Snapshot if a vCPU's vendor model is AMD vs. Intel compatible KVM: VMX: Snapshot LBR capabilities during module initialization perf/x86/intel: Expose existence of callback support to KVM KVM: VMX: Disable LBR virtualization if the CPU doesn't support LBR callstacks KVM: x86/mmu: Precisely invalidate MMU root_role during CPUID update KVM: Drop unused @may_block param from gfn_to_pfn_cache_invalidate_start() Tao Su (1): KVM: VMX: Ignore MKTME KeyID bits when intercepting #PF for allow_smaller_maxphyaddr arch/x86/events/intel/lbr.c | 1 + arch/x86/include/asm/kvm_host.h | 1 + arch/x86/include/asm/perf_event.h | 1 + arch/x86/kvm/Makefile | 5 -- arch/x86/kvm/cpuid.c | 1 + arch/x86/kvm/cpuid.h | 10 +++ arch/x86/kvm/lapic.c | 3 +- arch/x86/kvm/mmu/mmu.c | 11 +-- arch/x86/kvm/mmu/tdp_mmu.c | 51 +++++------- arch/x86/kvm/pmu.c | 16 +++- arch/x86/kvm/svm/sev.c | 2 +- arch/x86/kvm/svm/svm.c | 17 ++-- arch/x86/kvm/svm/svm.h | 3 +- arch/x86/kvm/svm/vmenter.S | 97 ++++++++++------------ arch/x86/kvm/vmx/pmu_intel.c | 2 +- arch/x86/kvm/vmx/vmx.c | 41 +++++++-- arch/x86/kvm/vmx/vmx.h | 6 +- arch/x86/kvm/x86.c | 2 +- .../testing/selftests/kvm/max_guest_memory_test.c | 15 ++-- .../testing/selftests/kvm/set_memory_region_test.c | 2 +- .../selftests/kvm/x86_64/pmu_counters_test.c | 20 ++++- .../selftests/kvm/x86_64/vmx_dirty_log_test.c | 60 +++++++++---- virt/kvm/kvm_main.c | 3 +- virt/kvm/kvm_mm.h | 6 +- virt/kvm/pfncache.c | 50 +++++++---- 25 files changed, 267 insertions(+), 159 deletions(-)
