search for: cpu_has_vmx_vmfunc

..._DECODE - Set when re-emulating an instruction (after completing diff --git a/arch/x86/kvm/vmx/capabilities.h b/arch/x86/kvm/vmx/capabilities.h index e7d7fcb7e17f..92781e2c523e 100644 --- a/arch/x86/kvm/vmx/capabilities.h +++ b/arch/x86/kvm/vmx/capabilities.h @@ -219,6 +219,14 @@ static inline bool cpu_has_vmx_vmfunc(void) SECONDARY_EXEC_ENABLE_VMFUNC; } +static inline bool cpu_has_vmx_eptp_switching(void) +{ + u64 vmx_msr; + + rdmsrl(MSR_IA32_VMX_VMFUNC, vmx_msr); + return vmx_msr & VMX_VMFUNC_EPTP_SWITCHING; +} + static inline bool cpu_has_vmx_shadow_vmcs(void) { u64 vmx_msr; diff --git a/arch/x...

...arch/x86/kvm/vmx.c | 13 ++++--------- 1 file changed, 4 insertions(+), 9 deletions(-) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 8434fc8..5f5c2f1 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -5502,13 +5502,12 @@ static int vmx_vcpu_setup(struct vcpu_vmx *vmx) if (cpu_has_vmx_vmfunc()) vmcs_write64(VM_FUNCTION_CONTROL, 0); - vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0); - vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0); vmcs_write64(VM_EXIT_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.host)); vmcs_write64(VM_EXIT_MSR_STORE_ADDR, __pa(vmx->msr_autoload.guest)); - vmcs_write32(VM_EN...

.../kvm/vmx/vmx.c index 8c9ccd1ba0f0..ec4396d5f36f 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -7992,6 +7992,11 @@ static void vmx_control_singlestep(struct kvm_vcpu *vcpu, bool enable) CPU_BASED_MONITOR_TRAP_FLAG); } +static bool vmx_get_vmfunc_status(void) +{ + return cpu_has_vmx_vmfunc(); +} + static struct kvm_x86_ops vmx_x86_ops __initdata = { .hardware_unsetup = hardware_unsetup, @@ -8133,6 +8138,7 @@ static struct kvm_x86_ops vmx_x86_ops __initdata = { .spt_fault = vmx_spt_fault, .gpt_translation_fault = vmx_gpt_translation_fault, .control_singlestep = vmx_control_...

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

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