static inline bool cpu_has_load_ia32_efer(void)
{
- return (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_EFER) &&
- (vmcs_config.vmexit_ctrl & VM_EXIT_LOAD_IA32_EFER);
+ return vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_EFER;
}
static inline bool cpu_has_load_perf_global_ctrl(void)
{
- return (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL) &&
- (vmcs_config.vmexit_ctrl & VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL);
+ return vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL;
}
static inline bool cpu_has_vmx_mpx(void)
{
- return (vmcs_config.vmexit_ctrl & VM_EXIT_CLEAR_BNDCFGS) &&
- (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_BNDCFGS);
+ return vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_BNDCFGS;
}
static inline bool cpu_has_vmx_tpr_shadow(void)
rdmsrl(MSR_IA32_VMX_MISC, vmx_msr);
return (vmx_msr & MSR_IA32_VMX_MISC_INTEL_PT) &&
(vmcs_config.cpu_based_2nd_exec_ctrl & SECONDARY_EXEC_PT_USE_GPA) &&
- (vmcs_config.vmexit_ctrl & VM_EXIT_CLEAR_IA32_RTIT_CTL) &&
(vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_RTIT_CTL);
}
u64 _cpu_based_3rd_exec_control = 0;
u32 _vmexit_control = 0;
u32 _vmentry_control = 0;
+ int i;
+
+ /*
+ * LOAD/SAVE_DEBUG_CONTROLS are absent because both are mandatory.
+ * SAVE_IA32_PAT and SAVE_IA32_EFER are absent because KVM always
+ * intercepts writes to PAT and EFER, i.e. never enables those controls.
+ */
+ struct {
+ u32 entry_control;
+ u32 exit_control;
+ } const vmcs_entry_exit_pairs[] = {
+ { VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL, VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL },
+ { VM_ENTRY_LOAD_IA32_PAT, VM_EXIT_LOAD_IA32_PAT },
+ { VM_ENTRY_LOAD_IA32_EFER, VM_EXIT_LOAD_IA32_EFER },
+ { VM_ENTRY_LOAD_BNDCFGS, VM_EXIT_CLEAR_BNDCFGS },
+ { VM_ENTRY_LOAD_IA32_RTIT_CTL, VM_EXIT_CLEAR_IA32_RTIT_CTL },
+ };
memset(vmcs_conf, 0, sizeof(*vmcs_conf));
min = CPU_BASED_HLT_EXITING |
&_vmentry_control) < 0)
return -EIO;
+ for (i = 0; i < ARRAY_SIZE(vmcs_entry_exit_pairs); i++) {
+ u32 n_ctrl = vmcs_entry_exit_pairs[i].entry_control;
+ u32 x_ctrl = vmcs_entry_exit_pairs[i].exit_control;
+
+ if (!(_vmentry_control & n_ctrl) == !(_vmexit_control & x_ctrl))
+ continue;
+
+ pr_warn_once("Inconsistent VM-Entry/VM-Exit pair, entry = %x, exit = %x\n",
+ _vmentry_control & n_ctrl, _vmexit_control & x_ctrl);
+
+ _vmentry_control &= ~n_ctrl;
+ _vmexit_control &= ~x_ctrl;
+ }
+
/*
* Some cpus support VM_{ENTRY,EXIT}_IA32_PERF_GLOBAL_CTRL but they
* can't be used due to an errata where VM Exit may incorrectly clear