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...@linux.intel.com/
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(-)
