| /* |
| * This file is part of the coreboot project. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <console/console.h> |
| #include <cpu/x86/msr.h> |
| #include <intelblocks/msr.h> |
| #include <intelblocks/vmx.h> |
| #include <soc/cpu.h> |
| #include <string.h> |
| |
| static bool vmx_param_valid; |
| static struct vmx_param g_vmx_param; |
| |
| static const struct vmx_param *get_vmx_param(void) |
| { |
| if (vmx_param_valid) |
| return &g_vmx_param; |
| |
| memset(&g_vmx_param, 0, sizeof(g_vmx_param)); |
| if (soc_fill_vmx_param(&g_vmx_param) < 0) { |
| printk(BIOS_ERR, "VMX : Failed to get soc vmx param\n"); |
| return NULL; |
| } |
| vmx_param_valid = true; |
| printk(BIOS_INFO, "VMX : param.enable = %d\n", g_vmx_param.enable); |
| |
| return &g_vmx_param; |
| } |
| |
| static int soc_vmx_enabled(void) |
| { |
| const struct vmx_param *vmx_param = get_vmx_param(); |
| return vmx_param ? vmx_param->enable : 0; |
| } |
| |
| void vmx_configure(void *unused) |
| { |
| msr_t msr; |
| struct cpuid_result regs; |
| |
| regs = cpuid(1); |
| |
| if (!soc_vmx_enabled() || !(regs.ecx & CPUID_VMX)) { |
| printk(BIOS_ERR, "VMX: pre-conditions not met\n"); |
| return; |
| } |
| |
| msr = rdmsr(IA32_FEATURE_CONTROL); |
| |
| /* Only enable it when it is not locked */ |
| if ((msr.lo & FEATURE_CONTROL_LOCK_BIT) == 0) { |
| /* Enable VMX */ |
| msr.lo |= FEATURE_ENABLE_VMX; |
| wrmsr(IA32_FEATURE_CONTROL, msr); |
| } |
| |
| /* Report current status */ |
| msr = rdmsr(IA32_FEATURE_CONTROL); |
| printk(BIOS_DEBUG, "VMX status: %s, %s\n", |
| (msr.lo & FEATURE_ENABLE_VMX) ? "enabled" : "disabled", |
| (msr.lo & FEATURE_CONTROL_LOCK_BIT) ? "locked" : "unlocked"); |
| } |