search for: enable_pml

...+++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 5f5c2f1..35e02a7 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -107,6 +107,9 @@ static u64 __read_mostly host_xss; static bool __read_mostly enable_pml = 1; module_param_named(pml, enable_pml, bool, S_IRUGO); +static bool __read_mostly enable_lbrv = 1; +module_param_named(lbrv, enable_lbrv, bool, 0444); + #define KVM_VMX_TSC_MULTIPLIER_MAX 0xffffffffffffffffULL /* Guest_tsc -> host_tsc conversion requires 64-bit division. */ @@ -542...

This patch series enables the Last Branch Recording feature for the guest. Instead of trapping each LBR stack MSR access, the MSRs are passthroughed to the guest. Those MSRs are switched (i.e. load and saved) on VMExit and VMEntry. Test: Try "perf record -b ./test_program" on guest. Wei Wang (4): KVM/vmx: re-write the msr auto switch feature KVM/vmx: auto switch

This patch series enables the Last Branch Recording feature for the guest. Instead of trapping each LBR stack MSR access, the MSRs are passthroughed to the guest. Those MSRs are switched (i.e. load and saved) on VMExit and VMEntry. Test: Try "perf record -b ./test_program" on guest. Wei Wang (4): KVM/vmx: re-write the msr auto switch feature KVM/vmx: auto switch

...+++++++++ > 1 file changed, 50 insertions(+) > > diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c > index 5f5c2f1..35e02a7 100644 > --- a/arch/x86/kvm/vmx.c > +++ b/arch/x86/kvm/vmx.c > @@ -107,6 +107,9 @@ static u64 __read_mostly host_xss; > static bool __read_mostly enable_pml = 1; > module_param_named(pml, enable_pml, bool, S_IRUGO); > > +static bool __read_mostly enable_lbrv = 1; > +module_param_named(lbrv, enable_lbrv, bool, 0444); > + > #define KVM_VMX_TSC_MULTIPLIER_MAX 0xffffffffffffffffULL > > /* Guest_tsc -> host_tsc conversi...

...+++++++++ > 1 file changed, 50 insertions(+) > > diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c > index 5f5c2f1..35e02a7 100644 > --- a/arch/x86/kvm/vmx.c > +++ b/arch/x86/kvm/vmx.c > @@ -107,6 +107,9 @@ static u64 __read_mostly host_xss; > static bool __read_mostly enable_pml = 1; > module_param_named(pml, enable_pml, bool, S_IRUGO); > > +static bool __read_mostly enable_lbrv = 1; > +module_param_named(lbrv, enable_lbrv, bool, 0444); > + > #define KVM_VMX_TSC_MULTIPLIER_MAX 0xffffffffffffffffULL > > /* Guest_tsc -> host_tsc conversi...

...SM_DX "; push %%" _ASM_BP ";" @@ -9504,6 +9540,7 @@ static void vmx_free_vcpu_nested(struct kvm_vcpu *vcpu) static void vmx_free_vcpu(struct kvm_vcpu *vcpu) { struct vcpu_vmx *vmx = to_vmx(vcpu); + size_t bytes = msr_autoload_count_max * sizeof(struct vmx_msr_entry); if (enable_pml) vmx_destroy_pml_buffer(vmx); @@ -9512,15 +9549,17 @@ static void vmx_free_vcpu(struct kvm_vcpu *vcpu) vmx_free_vcpu_nested(vcpu); free_loaded_vmcs(vmx->loaded_vmcs); kfree(vmx->guest_msrs); + free_pages_exact(vmx->msr_autoload.host, bytes); + free_pages_exact(vmx->msr_autoload...

...eturn exit_fastpath; } +static void vmx_destroy_eptp_list_page(struct vcpu_vmx *vmx) +{ + if (vmx->eptp_list_pg) { + __free_page(vmx->eptp_list_pg); + vmx->eptp_list_pg = NULL; + } +} + static void vmx_free_vcpu(struct kvm_vcpu *vcpu) { struct vcpu_vmx *vmx = to_vmx(vcpu); if (enable_pml) vmx_destroy_pml_buffer(vmx); + vmx_destroy_eptp_list_page(vmx); free_vpid(vmx->vpid); nested_vmx_free_vcpu(vcpu); free_loaded_vmcs(vmx->loaded_vmcs); @@ -7021,6 +7113,12 @@ static int vmx_create_vcpu(struct kvm_vcpu *vcpu) if (err < 0) goto free_pml; + if (kvm_eptp_switchi...

This patch series is based on the VM introspection patches (https://lore.kernel.org/kvm/20200721210922.7646-1-alazar at bitdefender.com/), extending the introspection API with EPT Views and Virtualization Exceptions (#VE) support. The purpose of this series is to get an initial feedback and to see if we are on the right track, especially because the changes made to add the EPT views are not small

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VM-s (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VM-s (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place