[v1] https://lore.kernel.org/r/20190828234134.132704-1-oupton@xxxxxxxxxx [v2] https://lore.kernel.org/r/20190903213044.168494-1-oupton@xxxxxxxxxx [v3] https://lore.kernel.org/r/20190903215801.183193-1-oupton@xxxxxxxxxx v1 => v2: - Add Krish's Co-developed-by and Signed-off-by tags. - Fix minor nit to kvm-unit-tests to use 'host' local variable throughout test_load_pgc() - Teach guest_state_test_main() to check guest state from within nested VM - Update proposed tests to use guest/host state checks, wherein the value is checked from MSR_CORE_PERF_GLOBAL_CTRL. - Changelog line wrapping v2 => v3: - Remove the value unchanged condition from kvm_is_valid_perf_global_ctrl - Add line to changelog for patch 3/8 v3 => v4: - Allow tests to set the guest func multiple times - Style fixes throughout kvm-unit-tests patches, per Krish's review This patchset exposes the "load IA32_PERF_GLOBAL_CTRL" to guests for nested VM-entry and VM-exit. There already was some existing code that supported the VM-exit ctrl, though it had an issue and was not exposed to the guest anyway. These patches are based on the original set that Krish Sadhukhan sent out earlier this year. Purpose of each patch: (1) Change the existing code that implemented the VM-exit functionality to use kvm_set_msr() to avoid being overwritten by atomic_perf_switch_msrs(). (2) Update prepare_vmcs02() to implement the VM-entry functionality, again using kvm_set_msr(). (3) Create a helper function for checking the validity of an IA32_PERF_GLOBAL_CTRL value against pmu->global_ctrl_mask. (4) Check guest state on VM-entry as described in the SDM. (5) Check host state on VM-entry as described in the SDM. (6) Expose the "load IA32_PERF_GLOBAL_CTRL" VM-entry and VM-exit controls if IA32_PERF_GLOBAL_CTRL is a valid MSR. (7) Modify guest_state_test_main() to check guest state MSRs (8) Tests in kvm-unit-tests to check the VM-entry and VM-exit controls work properly Oliver Upton (6): KVM: nVMX: Use kvm_set_msr to load IA32_PERF_GLOBAL_CTRL on vmexit KVM: nVMX: Load GUEST_IA32_PERF_GLOBAL_CTRL MSR on vm-entry KVM: VMX: Add helper to check reserved bits in IA32_PERF_GLOBAL_CTRL KVM: nVMX: check GUEST_IA32_PERF_GLOBAL_CTRL on VM-Entry KVM: nVMX: Check HOST_IA32_PERF_GLOBAL_CTRL on VM-entry KVM: nVMX: Expose load IA32_PERF_GLOBAL_CTRL vm control if supported arch/x86/kvm/pmu.h | 6 ++++++ arch/x86/kvm/vmx/nested.c | 37 +++++++++++++++++++++++++++++++++--- arch/x86/kvm/vmx/pmu_intel.c | 5 ++++- arch/x86/kvm/vmx/vmx.c | 21 ++++++++++++++++++++ arch/x86/kvm/vmx/vmx.h | 1 + 5 files changed, 66 insertions(+), 4 deletions(-) -- 2.23.0.187.g17f5b7556c-goog
