github/acrn-hypervisor
1
0
Fork 0
mirror of https://github.com/projectacrn/acrn-hypervisor.git synced 2025-09-12 12:30:08 +00:00
Code Issues Projects Releases Wiki Activity

modulization: move functions related with cpu caps into cpu_caps.c

Browse Source 
move cpu caps related functions like capability init/detect/check
in cpu.c & mmu.c into a new file cpu_caps.c

Changes to be committed:
	modified:   developer-guides/hld/hv-memmgt.rst
	modified:   ../hypervisor/Makefile
	modified:   ../hypervisor/arch/x86/cpu.c
	new file:   ../hypervisor/arch/x86/cpu_caps.c
	modified:   ../hypervisor/arch/x86/mmu.c
	modified:   ../hypervisor/arch/x86/vmx_asm.S
	modified:   ../hypervisor/include/arch/x86/cpu.h
	new file:   ../hypervisor/include/arch/x86/cpu_caps.h
	modified:   ../hypervisor/include/arch/x86/guest/vm.h
	modified:   ../hypervisor/include/arch/x86/mmu.h
	modified:   ../hypervisor/include/arch/x86/vmcs.h

Tracked-On: #1842
Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Jason Chen CJ
2018-12-10 13:47:39 +08:00
committed by wenlingz
parent b8ffac8bac
commit 746fbe147d
11 changed files with 588 additions and 538 deletions
Download Patch File Download Diff File Expand all files Collapse all files

423
hypervisor/arch/x86/cpu.c
View File

@@ -10,6 +10,7 @@
#include <version.h>
#include <trampoline.h>
#include <e820.h>
#include <cpu_caps.h>
struct per_cpu_region per_cpu_data[CONFIG_MAX_PCPU_NUM] __aligned(PAGE_SIZE);
uint16_t phys_cpu_num = 0U;
@@ -20,265 +21,12 @@ static uint64_t startup_paddr = 0UL;
/* physical cpu active bitmap, support up to 64 cpus */
uint64_t pcpu_active_bitmap = 0UL;
static bool skip_l1dfl_vmentry;
static uint64_t x86_arch_capabilities;
/* TODO: add more capability per requirement */
/* APICv features */
#define VAPIC_FEATURE_VIRT_ACCESS (1U << 0U)
#define VAPIC_FEATURE_VIRT_REG (1U << 1U)
#define VAPIC_FEATURE_INTR_DELIVERY (1U << 2U)
#define VAPIC_FEATURE_TPR_SHADOW (1U << 3U)
#define VAPIC_FEATURE_POST_INTR (1U << 4U)
#define VAPIC_FEATURE_VX2APIC_MODE (1U << 5U)
struct cpu_capability {
uint8_t apicv_features;
uint8_t ept_features;
};
static struct cpu_capability cpu_caps;
struct cpuinfo_x86 boot_cpu_data;
static void cpu_cap_detect(void);
static void cpu_xsave_init(void);
static void set_current_cpu_id(uint16_t pcpu_id);
static void print_hv_banner(void);
static uint16_t get_cpu_id_from_lapic_id(uint32_t lapic_id);
int32_t ibrs_type;
static uint64_t start_tsc __attribute__((__section__(".bss_noinit")));
bool cpu_has_cap(uint32_t bit)
{
uint32_t feat_idx = bit >> 5U;
uint32_t feat_bit = bit & 0x1fU;
bool ret;
if (feat_idx >= FEATURE_WORDS) {
ret = false;
} else {
ret = ((boot_cpu_data.cpuid_leaves[feat_idx] & (1U << feat_bit)) != 0U);
}
return ret;
}
static inline bool get_monitor_cap(void)
{
if (cpu_has_cap(X86_FEATURE_MONITOR)) {
/* don't use monitor for CPU (family: 0x6 model: 0x5c)
* in hypervisor, but still expose it to the guests and
* let them handle it correctly
*/
if ((boot_cpu_data.family != 0x6U) || (boot_cpu_data.model != 0x5cU)) {
return true;
}
}
return false;
}
static inline bool is_fast_string_erms_supported_and_enabled(void)
{
bool ret = false;
uint32_t misc_enable = (uint32_t)msr_read(MSR_IA32_MISC_ENABLE);
if ((misc_enable & MSR_IA32_MISC_ENABLE_FAST_STRING) == 0U) {
pr_fatal("%s, fast string is not enabled\n", __func__);
} else {
if (!cpu_has_cap(X86_FEATURE_ERMS)) {
pr_fatal("%s, enhanced rep movsb/stosb not supported\n", __func__);
} else {
ret = true;
}
}
return ret;
}
static uint64_t get_address_mask(uint8_t limit)
{
return ((1UL << limit) - 1UL) & PAGE_MASK;
}
static void get_cpu_capabilities(void)
{
uint32_t eax, unused;
uint32_t family, model;
cpuid(CPUID_VENDORSTRING,
&boot_cpu_data.cpuid_level,
&unused, &unused, &unused);
cpuid(CPUID_FEATURES, &eax, &unused,
&boot_cpu_data.cpuid_leaves[FEAT_1_ECX],
&boot_cpu_data.cpuid_leaves[FEAT_1_EDX]);
family = (eax >> 8U) & 0xffU;
if (family == 0xFU) {
family += (eax >> 20U) & 0xffU;
}
boot_cpu_data.family = (uint8_t)family;
model = (eax >> 4U) & 0xfU;
if (family >= 0x06U) {
model += ((eax >> 16U) & 0xfU) << 4U;
}
boot_cpu_data.model = (uint8_t)model;
cpuid(CPUID_EXTEND_FEATURE, &unused,
&boot_cpu_data.cpuid_leaves[FEAT_7_0_EBX],
&boot_cpu_data.cpuid_leaves[FEAT_7_0_ECX],
&boot_cpu_data.cpuid_leaves[FEAT_7_0_EDX]);
cpuid(CPUID_MAX_EXTENDED_FUNCTION,
&boot_cpu_data.extended_cpuid_level,
&unused, &unused, &unused);
if (boot_cpu_data.extended_cpuid_level >= CPUID_EXTEND_FUNCTION_1) {
cpuid(CPUID_EXTEND_FUNCTION_1, &unused, &unused,
&boot_cpu_data.cpuid_leaves[FEAT_8000_0001_ECX],
&boot_cpu_data.cpuid_leaves[FEAT_8000_0001_EDX]);
}
if (boot_cpu_data.extended_cpuid_level >= CPUID_EXTEND_ADDRESS_SIZE) {
cpuid(CPUID_EXTEND_ADDRESS_SIZE, &eax,
&boot_cpu_data.cpuid_leaves[FEAT_8000_0008_EBX],
&unused, &unused);
/* EAX bits 07-00: #Physical Address Bits
* bits 15-08: #Linear Address Bits
*/
boot_cpu_data.virt_bits = (uint8_t)((eax >> 8U) & 0xffU);
boot_cpu_data.phys_bits = (uint8_t)(eax & 0xffU);
boot_cpu_data.physical_address_mask =
get_address_mask(boot_cpu_data.phys_bits);
}
/* For speculation defence.
* The default way is to set IBRS at vmexit and then do IBPB at vcpu
* context switch(ibrs_type == IBRS_RAW).
* Now provide an optimized way (ibrs_type == IBRS_OPT) which set
* STIBP and do IBPB at vmexit,since having STIBP always set has less
* impact than having IBRS always set. Also since IBPB is already done
* at vmexit, it is no necessary to do so at vcpu context switch then.
*/
ibrs_type = IBRS_NONE;
/* Currently for APL, if we enabled retpoline, then IBRS should not
* take effect
* TODO: add IA32_ARCH_CAPABILITIES[1] check, if this bit is set, IBRS
* should be set all the time instead of relying on retpoline
*/
#ifndef CONFIG_RETPOLINE
if (cpu_has_cap(X86_FEATURE_IBRS_IBPB)) {
ibrs_type = IBRS_RAW;
if (cpu_has_cap(X86_FEATURE_STIBP)) {
ibrs_type = IBRS_OPT;
}
}
#endif
}
/*
* basic hardware capability check
* we should supplement which feature/capability we must support
* here later.
*/
static int32_t hardware_detect_support(void)
{
int32_t ret;
/* Long Mode (x86-64, 64-bit support) */
if (!cpu_has_cap(X86_FEATURE_LM)) {
pr_fatal("%s, LM not supported\n", __func__);
return -ENODEV;
}
if ((boot_cpu_data.phys_bits == 0U) ||
(boot_cpu_data.virt_bits == 0U)) {
pr_fatal("%s, can't detect Linear/Physical Address size\n",
__func__);
return -ENODEV;
}
/* lapic TSC deadline timer */
if (!cpu_has_cap(X86_FEATURE_TSC_DEADLINE)) {
pr_fatal("%s, TSC deadline not supported\n", __func__);
return -ENODEV;
}
/* Execute Disable */
if (!cpu_has_cap(X86_FEATURE_NX)) {
pr_fatal("%s, NX not supported\n", __func__);
return -ENODEV;
}
/* Supervisor-Mode Execution Prevention */
if (!cpu_has_cap(X86_FEATURE_SMEP)) {
pr_fatal("%s, SMEP not supported\n", __func__);
return -ENODEV;
}
/* Supervisor-Mode Access Prevention */
if (!cpu_has_cap(X86_FEATURE_SMAP)) {
pr_fatal("%s, SMAP not supported\n", __func__);
return -ENODEV;
}
if (!cpu_has_cap(X86_FEATURE_MTRR)) {
pr_fatal("%s, MTRR not supported\n", __func__);
return -ENODEV;
}
if (!cpu_has_cap(X86_FEATURE_PAGE1GB)) {
pr_fatal("%s, not support 1GB page\n", __func__);
return -ENODEV;
}
if (!cpu_has_cap(X86_FEATURE_VMX)) {
pr_fatal("%s, vmx not supported\n", __func__);
return -ENODEV;
}
if (!is_fast_string_erms_supported_and_enabled()) {
return -ENODEV;
}
if (!cpu_has_vmx_unrestricted_guest_cap()) {
pr_fatal("%s, unrestricted guest not supported\n", __func__);
return -ENODEV;
}
if (!is_ept_supported()) {
pr_fatal("%s, EPT not supported\n", __func__);
return -ENODEV;
}
if (boot_cpu_data.cpuid_level < 0x15U) {
pr_fatal("%s, required CPU feature not supported\n", __func__);
return -ENODEV;
}
if (is_vmx_disabled()) {
pr_fatal("%s, VMX can not be enabled\n", __func__);
return -ENODEV;
}
if (phys_cpu_num > CONFIG_MAX_PCPU_NUM) {
pr_fatal("%s, pcpu number(%d) is out of range\n", __func__, phys_cpu_num);
return -ENODEV;
}
ret = check_vmx_mmu_cap();
if (ret != 0) {
return ret;
}
pr_acrnlog("hardware support HV");
return 0;
}
static void init_percpu_lapic_id(void)
{
uint16_t i;
@@ -342,49 +90,6 @@ static void set_fs_base(void)
}
#endif
static void get_cpu_name(void)
{
cpuid(CPUID_EXTEND_FUNCTION_2,
(uint32_t *)(boot_cpu_data.model_name),
(uint32_t *)(&boot_cpu_data.model_name[4]),
(uint32_t *)(&boot_cpu_data.model_name[8]),
(uint32_t *)(&boot_cpu_data.model_name[12]));
cpuid(CPUID_EXTEND_FUNCTION_3,
(uint32_t *)(&boot_cpu_data.model_name[16]),
(uint32_t *)(&boot_cpu_data.model_name[20]),
(uint32_t *)(&boot_cpu_data.model_name[24]),
(uint32_t *)(&boot_cpu_data.model_name[28]));
cpuid(CPUID_EXTEND_FUNCTION_4,
(uint32_t *)(&boot_cpu_data.model_name[32]),
(uint32_t *)(&boot_cpu_data.model_name[36]),
(uint32_t *)(&boot_cpu_data.model_name[40]),
(uint32_t *)(&boot_cpu_data.model_name[44]));
boot_cpu_data.model_name[48] = '\0';
}
static bool check_cpu_security_config(void)
{
if (cpu_has_cap(X86_FEATURE_ARCH_CAP)) {
x86_arch_capabilities = msr_read(MSR_IA32_ARCH_CAPABILITIES);
skip_l1dfl_vmentry = ((x86_arch_capabilities
& IA32_ARCH_CAP_SKIP_L1DFL_VMENTRY) != 0UL);
} else {
return false;
}
if ((!cpu_has_cap(X86_FEATURE_L1D_FLUSH)) && (!skip_l1dfl_vmentry)) {
return false;
}
if (!cpu_has_cap(X86_FEATURE_IBRS_IBPB) &&
!cpu_has_cap(X86_FEATURE_STIBP)) {
return false;
}
return true;
}
void init_cpu_pre(uint16_t pcpu_id)
{
if (pcpu_id == BOOT_CPU_ID) {
@@ -688,117 +393,6 @@ void wait_sync_change(uint64_t *sync, uint64_t wake_sync)
}
}
/*check allowed ONEs setting in vmx control*/
static bool is_ctrl_setting_allowed(uint64_t msr_val, uint32_t ctrl)
{
/*
* Intel SDM Appendix A.3
* - bitX in ctrl can be set 1
* only if bit 32+X in msr_val is 1
*/
return ((((uint32_t)(msr_val >> 32UL)) & ctrl) == ctrl);
}
static void ept_cap_detect(void)
{
uint64_t msr_val;
cpu_caps.ept_features = 0U;
/* Read primary processor based VM control. */
msr_val = msr_read(MSR_IA32_VMX_PROCBASED_CTLS);
/*
* According to SDM A.3.2 Primary Processor-Based VM-Execution Controls:
* The IA32_VMX_PROCBASED_CTLS MSR (index 482H) reports on the allowed
* settings of most of the primary processor-based VM-execution controls
* (see Section 24.6.2):
* Bits 63:32 indicate the allowed 1-settings of these controls.
* VM entry allows control X to be 1 if bit 32+X in the MSR is set to 1;
* if bit 32+X in the MSR is cleared to 0, VM entry fails if control X
* is 1.
*/
msr_val = msr_val >> 32U;
/* Check if secondary processor based VM control is available. */
if ((msr_val & VMX_PROCBASED_CTLS_SECONDARY) != 0UL) {
/* Read secondary processor based VM control. */
msr_val = msr_read(MSR_IA32_VMX_PROCBASED_CTLS2);
if (is_ctrl_setting_allowed(msr_val, VMX_PROCBASED_CTLS2_EPT)) {
cpu_caps.ept_features = 1U;
}
}
}
static void apicv_cap_detect(void)
{
uint8_t features;
uint64_t msr_val;
msr_val = msr_read(MSR_IA32_VMX_PROCBASED_CTLS);
if (!is_ctrl_setting_allowed(msr_val, VMX_PROCBASED_CTLS_TPR_SHADOW)) {
pr_fatal("APICv: No APIC TPR virtualization support.");
return;
}
msr_val = msr_read(MSR_IA32_VMX_PROCBASED_CTLS2);
if (!is_ctrl_setting_allowed(msr_val, VMX_PROCBASED_CTLS2_VAPIC)) {
pr_fatal("APICv: No APIC-access virtualization support.");
return;
}
if (!is_ctrl_setting_allowed(msr_val, VMX_PROCBASED_CTLS2_VAPIC_REGS)) {
pr_fatal("APICv: No APIC-register virtualization support.");
return;
}
features = (VAPIC_FEATURE_TPR_SHADOW
| VAPIC_FEATURE_VIRT_ACCESS
| VAPIC_FEATURE_VIRT_REG);
if (is_ctrl_setting_allowed(msr_val, VMX_PROCBASED_CTLS2_VX2APIC)) {
features |= VAPIC_FEATURE_VX2APIC_MODE;
}
if (is_ctrl_setting_allowed(msr_val, VMX_PROCBASED_CTLS2_VIRQ)) {
features |= VAPIC_FEATURE_INTR_DELIVERY;
msr_val = msr_read(MSR_IA32_VMX_PINBASED_CTLS);
if (is_ctrl_setting_allowed(msr_val,
VMX_PINBASED_CTLS_POST_IRQ)) {
features |= VAPIC_FEATURE_POST_INTR;
}
}
cpu_caps.apicv_features = features;
}
static void cpu_cap_detect(void)
{
apicv_cap_detect();
ept_cap_detect();
}
bool is_ept_supported(void)
{
return (cpu_caps.ept_features != 0U);
}
bool is_apicv_reg_virtualization_supported(void)
{
return ((cpu_caps.apicv_features & VAPIC_FEATURE_VIRT_REG) != 0U);
}
bool is_apicv_intr_delivery_supported(void)
{
return ((cpu_caps.apicv_features & VAPIC_FEATURE_INTR_DELIVERY) != 0U);
}
bool is_apicv_posted_intr_supported(void)
{
return ((cpu_caps.apicv_features & VAPIC_FEATURE_POST_INTR) != 0U);
}
static void cpu_xsave_init(void)
{
uint64_t val64;
@@ -820,18 +414,3 @@ static void cpu_xsave_init(void)
}
}
}
void cpu_l1d_flush(void)
{
/*
* 'skip_l1dfl_vmentry' will be true on platform that
* is not affected by L1TF.
*
*/
if (!skip_l1dfl_vmentry) {
if (cpu_has_cap(X86_FEATURE_L1D_FLUSH)) {
msr_write(MSR_IA32_FLUSH_CMD, IA32_L1D_FLUSH);
}
}
}

505
hypervisor/arch/x86/cpu_caps.c Normal file
View File

@@ -0,0 +1,505 @@
/*
* Copyright (C) 2018 Intel Corporation. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <types.h>
#include <msr.h>
#include <page.h>
#include <cpufeatures.h>
#include <cpuid.h>
#include <spinlock.h>
#include <cpu.h>
#include <per_cpu.h>
#include <vmx.h>
#include <cpu_caps.h>
#include <errno.h>
#include <logmsg.h>
/* TODO: add more capability per requirement */
/* APICv features */
#define VAPIC_FEATURE_VIRT_ACCESS (1U << 0U)
#define VAPIC_FEATURE_VIRT_REG (1U << 1U)
#define VAPIC_FEATURE_INTR_DELIVERY (1U << 2U)
#define VAPIC_FEATURE_TPR_SHADOW (1U << 3U)
#define VAPIC_FEATURE_POST_INTR (1U << 4U)
#define VAPIC_FEATURE_VX2APIC_MODE (1U << 5U)
static struct vmx_capability {
uint32_t ept;
uint32_t vpid;
} vmx_caps;
struct cpu_capability {
uint8_t apicv_features;
uint8_t ept_features;
};
static struct cpu_capability cpu_caps;
struct cpuinfo_x86 boot_cpu_data;
static bool skip_l1dfl_vmentry;
static uint64_t x86_arch_capabilities;
int32_t ibrs_type;
bool cpu_has_cap(uint32_t bit)
{
uint32_t feat_idx = bit >> 5U;
uint32_t feat_bit = bit & 0x1fU;
bool ret;
if (feat_idx >= FEATURE_WORDS) {
ret = false;
} else {
ret = ((boot_cpu_data.cpuid_leaves[feat_idx] & (1U << feat_bit)) != 0U);
}
return ret;
}
bool get_monitor_cap(void)
{
if (cpu_has_cap(X86_FEATURE_MONITOR)) {
/* don't use monitor for CPU (family: 0x6 model: 0x5c)
* in hypervisor, but still expose it to the guests and
* let them handle it correctly
*/
if ((boot_cpu_data.family != 0x6U) || (boot_cpu_data.model != 0x5cU)) {
return true;
}
}
return false;
}
static inline bool is_fast_string_erms_supported_and_enabled(void)
{
bool ret = false;
uint32_t misc_enable = (uint32_t)msr_read(MSR_IA32_MISC_ENABLE);
if ((misc_enable & MSR_IA32_MISC_ENABLE_FAST_STRING) == 0U) {
pr_fatal("%s, fast string is not enabled\n", __func__);
} else {
if (!cpu_has_cap(X86_FEATURE_ERMS)) {
pr_fatal("%s, enhanced rep movsb/stosb not supported\n", __func__);
} else {
ret = true;
}
}
return ret;
}
static uint64_t get_address_mask(uint8_t limit)
{
return ((1UL << limit) - 1UL) & PAGE_MASK;
}
void get_cpu_capabilities(void)
{
uint32_t eax, unused;
uint32_t family, model;
cpuid(CPUID_VENDORSTRING,
&boot_cpu_data.cpuid_level,
&unused, &unused, &unused);
cpuid(CPUID_FEATURES, &eax, &unused,
&boot_cpu_data.cpuid_leaves[FEAT_1_ECX],
&boot_cpu_data.cpuid_leaves[FEAT_1_EDX]);
family = (eax >> 8U) & 0xffU;
if (family == 0xFU) {
family += (eax >> 20U) & 0xffU;
}
boot_cpu_data.family = (uint8_t)family;
model = (eax >> 4U) & 0xfU;
if (family >= 0x06U) {
model += ((eax >> 16U) & 0xfU) << 4U;
}
boot_cpu_data.model = (uint8_t)model;
cpuid(CPUID_EXTEND_FEATURE, &unused,
&boot_cpu_data.cpuid_leaves[FEAT_7_0_EBX],
&boot_cpu_data.cpuid_leaves[FEAT_7_0_ECX],
&boot_cpu_data.cpuid_leaves[FEAT_7_0_EDX]);
cpuid(CPUID_MAX_EXTENDED_FUNCTION,
&boot_cpu_data.extended_cpuid_level,
&unused, &unused, &unused);
if (boot_cpu_data.extended_cpuid_level >= CPUID_EXTEND_FUNCTION_1) {
cpuid(CPUID_EXTEND_FUNCTION_1, &unused, &unused,
&boot_cpu_data.cpuid_leaves[FEAT_8000_0001_ECX],
&boot_cpu_data.cpuid_leaves[FEAT_8000_0001_EDX]);
}
if (boot_cpu_data.extended_cpuid_level >= CPUID_EXTEND_ADDRESS_SIZE) {
cpuid(CPUID_EXTEND_ADDRESS_SIZE, &eax,
&boot_cpu_data.cpuid_leaves[FEAT_8000_0008_EBX],
&unused, &unused);
/* EAX bits 07-00: #Physical Address Bits
* bits 15-08: #Linear Address Bits
*/
boot_cpu_data.virt_bits = (uint8_t)((eax >> 8U) & 0xffU);
boot_cpu_data.phys_bits = (uint8_t)(eax & 0xffU);
boot_cpu_data.physical_address_mask =
get_address_mask(boot_cpu_data.phys_bits);
}
/* For speculation defence.
* The default way is to set IBRS at vmexit and then do IBPB at vcpu
* context switch(ibrs_type == IBRS_RAW).
* Now provide an optimized way (ibrs_type == IBRS_OPT) which set
* STIBP and do IBPB at vmexit,since having STIBP always set has less
* impact than having IBRS always set. Also since IBPB is already done
* at vmexit, it is no necessary to do so at vcpu context switch then.
*/
ibrs_type = IBRS_NONE;
/* Currently for APL, if we enabled retpoline, then IBRS should not
* take effect
* TODO: add IA32_ARCH_CAPABILITIES[1] check, if this bit is set, IBRS
* should be set all the time instead of relying on retpoline
*/
#ifndef CONFIG_RETPOLINE
if (cpu_has_cap(X86_FEATURE_IBRS_IBPB)) {
ibrs_type = IBRS_RAW;
if (cpu_has_cap(X86_FEATURE_STIBP)) {
ibrs_type = IBRS_OPT;
}
}
#endif
}
/*check allowed ONEs setting in vmx control*/
static bool is_ctrl_setting_allowed(uint64_t msr_val, uint32_t ctrl)
{
/*
* Intel SDM Appendix A.3
* - bitX in ctrl can be set 1
* only if bit 32+X in msr_val is 1
*/
return ((((uint32_t)(msr_val >> 32UL)) & ctrl) == ctrl);
}
static void ept_cap_detect(void)
{
uint64_t msr_val;
cpu_caps.ept_features = 0U;
/* Read primary processor based VM control. */
msr_val = msr_read(MSR_IA32_VMX_PROCBASED_CTLS);
/*
* According to SDM A.3.2 Primary Processor-Based VM-Execution Controls:
* The IA32_VMX_PROCBASED_CTLS MSR (index 482H) reports on the allowed
* settings of most of the primary processor-based VM-execution controls
* (see Section 24.6.2):
* Bits 63:32 indicate the allowed 1-settings of these controls.
* VM entry allows control X to be 1 if bit 32+X in the MSR is set to 1;
* if bit 32+X in the MSR is cleared to 0, VM entry fails if control X
* is 1.
*/
msr_val = msr_val >> 32U;
/* Check if secondary processor based VM control is available. */
if ((msr_val & VMX_PROCBASED_CTLS_SECONDARY) != 0UL) {
/* Read secondary processor based VM control. */
msr_val = msr_read(MSR_IA32_VMX_PROCBASED_CTLS2);
if (is_ctrl_setting_allowed(msr_val, VMX_PROCBASED_CTLS2_EPT)) {
cpu_caps.ept_features = 1U;
}
}
}
static void apicv_cap_detect(void)
{
uint8_t features;
uint64_t msr_val;
msr_val = msr_read(MSR_IA32_VMX_PROCBASED_CTLS);
if (!is_ctrl_setting_allowed(msr_val, VMX_PROCBASED_CTLS_TPR_SHADOW)) {
pr_fatal("APICv: No APIC TPR virtualization support.");
return;
}
msr_val = msr_read(MSR_IA32_VMX_PROCBASED_CTLS2);
if (!is_ctrl_setting_allowed(msr_val, VMX_PROCBASED_CTLS2_VAPIC)) {
pr_fatal("APICv: No APIC-access virtualization support.");
return;
}
if (!is_ctrl_setting_allowed(msr_val, VMX_PROCBASED_CTLS2_VAPIC_REGS)) {
pr_fatal("APICv: No APIC-register virtualization support.");
return;
}
features = (VAPIC_FEATURE_TPR_SHADOW
| VAPIC_FEATURE_VIRT_ACCESS
| VAPIC_FEATURE_VIRT_REG);
if (is_ctrl_setting_allowed(msr_val, VMX_PROCBASED_CTLS2_VX2APIC)) {
features |= VAPIC_FEATURE_VX2APIC_MODE;
}
if (is_ctrl_setting_allowed(msr_val, VMX_PROCBASED_CTLS2_VIRQ)) {
features |= VAPIC_FEATURE_INTR_DELIVERY;
msr_val = msr_read(MSR_IA32_VMX_PINBASED_CTLS);
if (is_ctrl_setting_allowed(msr_val,
VMX_PINBASED_CTLS_POST_IRQ)) {
features |= VAPIC_FEATURE_POST_INTR;
}
}
cpu_caps.apicv_features = features;
}
void cpu_cap_detect(void)
{
apicv_cap_detect();
ept_cap_detect();
}
bool is_ept_supported(void)
{
return (cpu_caps.ept_features != 0U);
}
bool is_apicv_reg_virtualization_supported(void)
{
return ((cpu_caps.apicv_features & VAPIC_FEATURE_VIRT_REG) != 0U);
}
bool is_apicv_intr_delivery_supported(void)
{
return ((cpu_caps.apicv_features & VAPIC_FEATURE_INTR_DELIVERY) != 0U);
}
bool is_apicv_posted_intr_supported(void)
{
return ((cpu_caps.apicv_features & VAPIC_FEATURE_POST_INTR) != 0U);
}
void get_cpu_name(void)
{
cpuid(CPUID_EXTEND_FUNCTION_2,
(uint32_t *)(boot_cpu_data.model_name),
(uint32_t *)(&boot_cpu_data.model_name[4]),
(uint32_t *)(&boot_cpu_data.model_name[8]),
(uint32_t *)(&boot_cpu_data.model_name[12]));
cpuid(CPUID_EXTEND_FUNCTION_3,
(uint32_t *)(&boot_cpu_data.model_name[16]),
(uint32_t *)(&boot_cpu_data.model_name[20]),
(uint32_t *)(&boot_cpu_data.model_name[24]),
(uint32_t *)(&boot_cpu_data.model_name[28]));
cpuid(CPUID_EXTEND_FUNCTION_4,
(uint32_t *)(&boot_cpu_data.model_name[32]),
(uint32_t *)(&boot_cpu_data.model_name[36]),
(uint32_t *)(&boot_cpu_data.model_name[40]),
(uint32_t *)(&boot_cpu_data.model_name[44]));
boot_cpu_data.model_name[48] = '\0';
}
bool check_cpu_security_config(void)
{
if (cpu_has_cap(X86_FEATURE_ARCH_CAP)) {
x86_arch_capabilities = msr_read(MSR_IA32_ARCH_CAPABILITIES);
skip_l1dfl_vmentry = ((x86_arch_capabilities
& IA32_ARCH_CAP_SKIP_L1DFL_VMENTRY) != 0UL);
} else {
return false;
}
if ((!cpu_has_cap(X86_FEATURE_L1D_FLUSH)) && (!skip_l1dfl_vmentry)) {
return false;
}
if (!cpu_has_cap(X86_FEATURE_IBRS_IBPB) &&
!cpu_has_cap(X86_FEATURE_STIBP)) {
return false;
}
return true;
}
void cpu_l1d_flush(void)
{
/*
* 'skip_l1dfl_vmentry' will be true on platform that
* is not affected by L1TF.
*
*/
if (!skip_l1dfl_vmentry) {
if (cpu_has_cap(X86_FEATURE_L1D_FLUSH)) {
msr_write(MSR_IA32_FLUSH_CMD, IA32_L1D_FLUSH);
}
}
}
static inline bool is_vmx_disabled(void)
{
uint64_t msr_val;
/* Read Feature ControL MSR */
msr_val = msr_read(MSR_IA32_FEATURE_CONTROL);
/* Check if feature control is locked and vmx cannot be enabled */
if ((msr_val & MSR_IA32_FEATURE_CONTROL_LOCK) != 0U &&
(msr_val & MSR_IA32_FEATURE_CONTROL_VMX_NO_SMX) == 0U) {
return true;
}
return false;
}
static inline bool cpu_has_vmx_unrestricted_guest_cap(void)
{
return ((msr_read(MSR_IA32_VMX_MISC) & VMX_SUPPORT_UNRESTRICTED_GUEST)
!= 0UL);
}
bool cpu_has_vmx_ept_cap(uint32_t bit_mask)
{
return ((vmx_caps.ept & bit_mask) != 0U);
}
bool cpu_has_vmx_vpid_cap(uint32_t bit_mask)
{
return ((vmx_caps.vpid & bit_mask) != 0U);
}
static int32_t check_vmx_mmu_cap(void)
{
uint64_t val;
/* Read the MSR register of EPT and VPID Capability - SDM A.10 */
val = msr_read(MSR_IA32_VMX_EPT_VPID_CAP);
vmx_caps.ept = (uint32_t) val;
vmx_caps.vpid = (uint32_t) (val >> 32U);
if (!cpu_has_vmx_ept_cap(VMX_EPT_INVEPT)) {
pr_fatal("%s, invept not supported\n", __func__);
return -ENODEV;
}
if (!cpu_has_vmx_vpid_cap(VMX_VPID_INVVPID) ||
!cpu_has_vmx_vpid_cap(VMX_VPID_INVVPID_SINGLE_CONTEXT) ||
!cpu_has_vmx_vpid_cap(VMX_VPID_INVVPID_GLOBAL_CONTEXT)) {
pr_fatal("%s, invvpid not supported\n", __func__);
return -ENODEV;
}
if (!cpu_has_vmx_ept_cap(VMX_EPT_1GB_PAGE)) {
pr_fatal("%s, ept not support 1GB large page\n", __func__);
return -ENODEV;
}
return 0;
}
/*
* basic hardware capability check
* we should supplement which feature/capability we must support
* here later.
*/
int32_t hardware_detect_support(void)
{
int32_t ret;
/* Long Mode (x86-64, 64-bit support) */
if (!cpu_has_cap(X86_FEATURE_LM)) {
pr_fatal("%s, LM not supported\n", __func__);
return -ENODEV;
}
if ((boot_cpu_data.phys_bits == 0U) ||
(boot_cpu_data.virt_bits == 0U)) {
pr_fatal("%s, can't detect Linear/Physical Address size\n",
__func__);
return -ENODEV;
}
/* lapic TSC deadline timer */
if (!cpu_has_cap(X86_FEATURE_TSC_DEADLINE)) {
pr_fatal("%s, TSC deadline not supported\n", __func__);
return -ENODEV;
}
/* Execute Disable */
if (!cpu_has_cap(X86_FEATURE_NX)) {
pr_fatal("%s, NX not supported\n", __func__);
return -ENODEV;
}
/* Supervisor-Mode Execution Prevention */
if (!cpu_has_cap(X86_FEATURE_SMEP)) {
pr_fatal("%s, SMEP not supported\n", __func__);
return -ENODEV;
}
/* Supervisor-Mode Access Prevention */
if (!cpu_has_cap(X86_FEATURE_SMAP)) {
pr_fatal("%s, SMAP not supported\n", __func__);
return -ENODEV;
}
if (!cpu_has_cap(X86_FEATURE_MTRR)) {
pr_fatal("%s, MTRR not supported\n", __func__);
return -ENODEV;
}
if (!cpu_has_cap(X86_FEATURE_PAGE1GB)) {
pr_fatal("%s, not support 1GB page\n", __func__);
return -ENODEV;
}
if (!cpu_has_cap(X86_FEATURE_VMX)) {
pr_fatal("%s, vmx not supported\n", __func__);
return -ENODEV;
}
if (!is_fast_string_erms_supported_and_enabled()) {
return -ENODEV;
}
if (!cpu_has_vmx_unrestricted_guest_cap()) {
pr_fatal("%s, unrestricted guest not supported\n", __func__);
return -ENODEV;
}
if (!is_ept_supported()) {
pr_fatal("%s, EPT not supported\n", __func__);
return -ENODEV;
}
if (boot_cpu_data.cpuid_level < 0x15U) {
pr_fatal("%s, required CPU feature not supported\n", __func__);
return -ENODEV;
}
if (is_vmx_disabled()) {
pr_fatal("%s, VMX can not be enabled\n", __func__);
return -ENODEV;
}
if (phys_cpu_num > CONFIG_MAX_PCPU_NUM) {
pr_fatal("%s, pcpu number(%d) is out of range\n", __func__, phys_cpu_num);
return -ENODEV;
}
ret = check_vmx_mmu_cap();
if (ret != 0) {
return ret;
}
pr_acrnlog("hardware support HV");
return 0;
}

44
hypervisor/arch/x86/mmu.c
View File

@@ -34,11 +34,6 @@
static void *ppt_mmu_pml4_addr;
static uint8_t sanitized_page[PAGE_SIZE] __aligned(PAGE_SIZE);
static struct vmx_capability {
uint32_t ept;
uint32_t vpid;
} vmx_caps;
/*
* If the logical processor is in VMX non-root operation and
* the "enable VPID" VM-execution control is 1, the current VPID
@@ -97,45 +92,6 @@ static inline void local_invept(uint64_t type, struct invept_desc desc)
ASSERT(error == 0, "invept error");
}
static inline bool cpu_has_vmx_ept_cap(uint32_t bit_mask)
{
return ((vmx_caps.ept & bit_mask) != 0U);
}
static inline bool cpu_has_vmx_vpid_cap(uint32_t bit_mask)
{
return ((vmx_caps.vpid & bit_mask) != 0U);
}
int32_t check_vmx_mmu_cap(void)
{
uint64_t val;
/* Read the MSR register of EPT and VPID Capability - SDM A.10 */
val = msr_read(MSR_IA32_VMX_EPT_VPID_CAP);
vmx_caps.ept = (uint32_t) val;
vmx_caps.vpid = (uint32_t) (val >> 32U);
if (!cpu_has_vmx_ept_cap(VMX_EPT_INVEPT)) {
pr_fatal("%s, invept not supported\n", __func__);
return -ENODEV;
}
if (!cpu_has_vmx_vpid_cap(VMX_VPID_INVVPID) ||
!cpu_has_vmx_vpid_cap(VMX_VPID_INVVPID_SINGLE_CONTEXT) ||
!cpu_has_vmx_vpid_cap(VMX_VPID_INVVPID_GLOBAL_CONTEXT)) {
pr_fatal("%s, invvpid not supported\n", __func__);
return -ENODEV;
}
if (!cpu_has_vmx_ept_cap(VMX_EPT_1GB_PAGE)) {
pr_fatal("%s, ept not support 1GB large page\n", __func__);
return -ENODEV;
}
return 0;
}
uint16_t allocate_vpid(void)
{
uint16_t vpid = atomic_xadd16(&vmx_vpid_nr, 1U);

1
hypervisor/arch/x86/vmx_asm.S
View File

@@ -9,6 +9,7 @@
#include <guest.h>
#include <vcpu.h>
#include <cpu.h>
#include <cpu_caps.h>
#include <types.h>
/* NOTE: