Hi, do we have any comments on this patch set? On 2021/3/14 23:52, Like Xu wrote:
Hi geniuses, Please help review the new version of Arch LBR enabling patch set. The Architectural Last Branch Records (LBRs) is publiced in the 319433-040 release of Intel Architecture Instruction Set Extensions and Future Features Programming Reference[0]. --- v3->v4 Changelog: - Add one more host patch to reuse ARCH_LBR_CTL_MASK; - Add reserve_lbr_buffers() instead of using GFP_ATOMIC; - Fia a bug in the arch_lbr_depth_is_valid(); - Add LBR_CTL_EN to unify DEBUGCTLMSR_LBR and ARCH_LBR_CTL_LBREN; - Add vmx->host_lbrctlmsr to save/restore host values; - Add KVM_SUPPORTED_XSS to refactoring supported_xss; - Clear Arch_LBR ans its XSS bit if it's not supported; - Add negative testing to the related kvm-unit-tests; - Refine code and commit messages; Previous: https://lore.kernel.org/kvm/20210303135756.1546253-1-like.xu@xxxxxxxxxxxxxxx/ Like Xu (11): KVM: vmx/pmu: Add MSR_ARCH_LBR_DEPTH emulation for Arch LBR KVM: vmx/pmu: Add MSR_ARCH_LBR_CTL emulation for Arch LBR KVM: vmx/pmu: Add Arch LBR emulation and its VMCS field KVM: x86: Expose Architectural LBR CPUID leaf KVM: x86: Refine the matching and clearing logic for supported_xss KVM: x86: Add XSAVE Support for Architectural LBRs arch/x86/events/core.c | 8 ++- arch/x86/events/intel/bts.c | 2 +- arch/x86/events/intel/core.c | 6 +- arch/x86/events/intel/lbr.c | 28 +++++---- arch/x86/events/perf_event.h | 8 ++- arch/x86/include/asm/msr-index.h | 1 + arch/x86/include/asm/vmx.h | 4 ++ arch/x86/kvm/cpuid.c | 25 +++++++- arch/x86/kvm/vmx/capabilities.h | 25 +++++--- arch/x86/kvm/vmx/pmu_intel.c | 103 ++++++++++++++++++++++++++++--- arch/x86/kvm/vmx/vmx.c | 50 +++++++++++++-- arch/x86/kvm/vmx/vmx.h | 4 ++ arch/x86/kvm/x86.c | 6 +- 13 files changed, 227 insertions(+), 43 deletions(-)
