summaryrefslogtreecommitdiff
path: root/src/soc/intel/common/block
diff options
context:
space:
mode:
authorMatt DeVillier <matt.devillier@gmail.com>2018-03-22 13:57:10 -0500
committerPatrick Georgi <pgeorgi@google.com>2018-03-28 06:46:28 +0000
commit9aae51ad1141a47d5c2f7133b02f5f0ab6168860 (patch)
tree63bf4a418e5d03ac51532f75bd6017a1fc9a7a97 /src/soc/intel/common/block
parent2410cd937925df60934855c885a16c40d2d69739 (diff)
soc/intel/common/block: add VMX support
Enable VMX if supported by CPU and enabled in board devicetree. Check lock bit unset before enabling VMX. Change-Id: Ic57eac45e9c65baa4479735c6d70a7eb685f080e Signed-off-by: Matt DeVillier <matt.devillier@gmail.com> Reviewed-on: https://review.coreboot.org/25331 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/soc/intel/common/block')
-rw-r--r--src/soc/intel/common/block/include/intelblocks/msr.h1
-rw-r--r--src/soc/intel/common/block/include/intelblocks/vmx.h30
-rw-r--r--src/soc/intel/common/block/vmx/Kconfig3
-rw-r--r--src/soc/intel/common/block/vmx/Makefile.inc1
-rw-r--r--src/soc/intel/common/block/vmx/vmx.c72
5 files changed, 107 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/include/intelblocks/msr.h b/src/soc/intel/common/block/include/intelblocks/msr.h
index 7aa81f09ea..22e8862e98 100644
--- a/src/soc/intel/common/block/include/intelblocks/msr.h
+++ b/src/soc/intel/common/block/include/intelblocks/msr.h
@@ -19,6 +19,7 @@
#define MSR_CORE_THREAD_COUNT 0x35
#define IA32_FEATURE_CONTROL 0x3a
#define FEATURE_CONTROL_LOCK (1)
+#define FEATURE_ENABLE_VMX (1 << 2)
#define CPUID_VMX (1 << 5)
#define CPUID_SMX (1 << 6)
#define SGX_GLOBAL_ENABLE (1 << 18)
diff --git a/src/soc/intel/common/block/include/intelblocks/vmx.h b/src/soc/intel/common/block/include/intelblocks/vmx.h
new file mode 100644
index 0000000000..1f6d33656e
--- /dev/null
+++ b/src/soc/intel/common/block/include/intelblocks/vmx.h
@@ -0,0 +1,30 @@
+/*
+ * 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.
+ */
+
+#ifndef SOC_INTEL_COMMON_BLOCK_VMX_H
+#define SOC_INTEL_COMMON_BLOCK_VMX_H
+
+struct vmx_param {
+ uint8_t enable;
+};
+
+/*
+ * Configure VMX.
+ */
+void vmx_configure(void);
+
+/* SOC specific API to get VMX params.
+ * returns 0, if able to get VMX params; otherwise returns -1 */
+int soc_fill_vmx_param(struct vmx_param *vmx_param);
+
+#endif /* SOC_INTEL_COMMON_BLOCK_VMX_H */
diff --git a/src/soc/intel/common/block/vmx/Kconfig b/src/soc/intel/common/block/vmx/Kconfig
new file mode 100644
index 0000000000..f8dce0791f
--- /dev/null
+++ b/src/soc/intel/common/block/vmx/Kconfig
@@ -0,0 +1,3 @@
+config SOC_INTEL_COMMON_BLOCK_VMX
+ bool "Enable VMX for virtualization"
+ default n
diff --git a/src/soc/intel/common/block/vmx/Makefile.inc b/src/soc/intel/common/block/vmx/Makefile.inc
new file mode 100644
index 0000000000..861e2f97d2
--- /dev/null
+++ b/src/soc/intel/common/block/vmx/Makefile.inc
@@ -0,0 +1 @@
+ramstage-$(CONFIG_SOC_INTEL_COMMON_BLOCK_VMX) += vmx.c
diff --git a/src/soc/intel/common/block/vmx/vmx.c b/src/soc/intel/common/block/vmx/vmx.c
new file mode 100644
index 0000000000..307ffd9ddb
--- /dev/null
+++ b/src/soc/intel/common/block/vmx/vmx.c
@@ -0,0 +1,72 @@
+/*
+ * 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)
+{
+ 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) == 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) ? "locked" : "unlocked");
+}