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31de3d2500
linux/arch/x86/kvm/vmx/evmcs.c
Vitaly Kuznetsov 31de3d2500 x86/kvm/hyper-v: move VMX controls sanitization out of nested_enable_evmcs() 
With fine grained VMX feature enablement QEMU>=4.2 tries to do KVM_SET_MSRS
with default (matching CPU model) values and in case eVMCS is also enabled,
fails.

It would be possible to drop VMX feature filtering completely and make
this a guest's responsibility: if it decides to use eVMCS it should know
which fields are available and which are not. Hyper-V mostly complies to
this, however, there are some problematic controls:
SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES
VM_{ENTRY,EXIT}_LOAD_IA32_PERF_GLOBAL_CTRL

which Hyper-V enables. As there are no corresponding fields in eVMCS, we
can't handle this properly in KVM. This is a Hyper-V issue.

Move VMX controls sanitization from nested_enable_evmcs() to vmx_get_msr(),
and do the bare minimum (only clear controls which are known to cause issues).
This allows userspace to keep setting controls it wants and at the same
time hides them from the guest.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-05 15:55:06 +01:00

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// SPDX-License-Identifier: GPL-2.0
#include <linux/errno.h>
#include <linux/smp.h>
#include "../hyperv.h"
#include "evmcs.h"
#include "vmcs.h"
#include "vmx.h"
DEFINE_STATIC_KEY_FALSE(enable_evmcs);
#if IS_ENABLED(CONFIG_HYPERV)
#define ROL16(val, n) ((u16)(((u16)(val) << (n)) | ((u16)(val) >> (16 - (n)))))
#define EVMCS1_OFFSET(x) offsetof(struct hv_enlightened_vmcs, x)
#define EVMCS1_FIELD(number, name, clean_field)[ROL16(number, 6)] = \
{EVMCS1_OFFSET(name), clean_field}
const struct evmcs_field vmcs_field_to_evmcs_1[] = {
/* 64 bit rw */
EVMCS1_FIELD(GUEST_RIP, guest_rip,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
EVMCS1_FIELD(GUEST_RSP, guest_rsp,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_BASIC),
EVMCS1_FIELD(GUEST_RFLAGS, guest_rflags,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_BASIC),
EVMCS1_FIELD(HOST_IA32_PAT, host_ia32_pat,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
EVMCS1_FIELD(HOST_IA32_EFER, host_ia32_efer,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
EVMCS1_FIELD(HOST_CR0, host_cr0,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
EVMCS1_FIELD(HOST_CR3, host_cr3,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
EVMCS1_FIELD(HOST_CR4, host_cr4,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
EVMCS1_FIELD(HOST_IA32_SYSENTER_ESP, host_ia32_sysenter_esp,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
EVMCS1_FIELD(HOST_IA32_SYSENTER_EIP, host_ia32_sysenter_eip,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
EVMCS1_FIELD(HOST_RIP, host_rip,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
EVMCS1_FIELD(IO_BITMAP_A, io_bitmap_a,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_IO_BITMAP),
EVMCS1_FIELD(IO_BITMAP_B, io_bitmap_b,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_IO_BITMAP),
EVMCS1_FIELD(MSR_BITMAP, msr_bitmap,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP),
EVMCS1_FIELD(GUEST_ES_BASE, guest_es_base,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_CS_BASE, guest_cs_base,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_SS_BASE, guest_ss_base,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_DS_BASE, guest_ds_base,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_FS_BASE, guest_fs_base,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_GS_BASE, guest_gs_base,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_LDTR_BASE, guest_ldtr_base,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_TR_BASE, guest_tr_base,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_GDTR_BASE, guest_gdtr_base,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_IDTR_BASE, guest_idtr_base,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(TSC_OFFSET, tsc_offset,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2),
EVMCS1_FIELD(VIRTUAL_APIC_PAGE_ADDR, virtual_apic_page_addr,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2),
EVMCS1_FIELD(VMCS_LINK_POINTER, vmcs_link_pointer,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
EVMCS1_FIELD(GUEST_IA32_DEBUGCTL, guest_ia32_debugctl,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
EVMCS1_FIELD(GUEST_IA32_PAT, guest_ia32_pat,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
EVMCS1_FIELD(GUEST_IA32_EFER, guest_ia32_efer,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
EVMCS1_FIELD(GUEST_PDPTR0, guest_pdptr0,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
EVMCS1_FIELD(GUEST_PDPTR1, guest_pdptr1,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
EVMCS1_FIELD(GUEST_PDPTR2, guest_pdptr2,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
EVMCS1_FIELD(GUEST_PDPTR3, guest_pdptr3,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
EVMCS1_FIELD(GUEST_PENDING_DBG_EXCEPTIONS, guest_pending_dbg_exceptions,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
EVMCS1_FIELD(GUEST_SYSENTER_ESP, guest_sysenter_esp,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
EVMCS1_FIELD(GUEST_SYSENTER_EIP, guest_sysenter_eip,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
EVMCS1_FIELD(CR0_GUEST_HOST_MASK, cr0_guest_host_mask,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
EVMCS1_FIELD(CR4_GUEST_HOST_MASK, cr4_guest_host_mask,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
EVMCS1_FIELD(CR0_READ_SHADOW, cr0_read_shadow,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
EVMCS1_FIELD(CR4_READ_SHADOW, cr4_read_shadow,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
EVMCS1_FIELD(GUEST_CR0, guest_cr0,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
EVMCS1_FIELD(GUEST_CR3, guest_cr3,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
EVMCS1_FIELD(GUEST_CR4, guest_cr4,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
EVMCS1_FIELD(GUEST_DR7, guest_dr7,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
EVMCS1_FIELD(HOST_FS_BASE, host_fs_base,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
EVMCS1_FIELD(HOST_GS_BASE, host_gs_base,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
EVMCS1_FIELD(HOST_TR_BASE, host_tr_base,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
EVMCS1_FIELD(HOST_GDTR_BASE, host_gdtr_base,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
EVMCS1_FIELD(HOST_IDTR_BASE, host_idtr_base,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
EVMCS1_FIELD(HOST_RSP, host_rsp,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
EVMCS1_FIELD(EPT_POINTER, ept_pointer,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_XLAT),
EVMCS1_FIELD(GUEST_BNDCFGS, guest_bndcfgs,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
EVMCS1_FIELD(XSS_EXIT_BITMAP, xss_exit_bitmap,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2),
/* 64 bit read only */
EVMCS1_FIELD(GUEST_PHYSICAL_ADDRESS, guest_physical_address,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
EVMCS1_FIELD(EXIT_QUALIFICATION, exit_qualification,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
/*
* Not defined in KVM:
*
* EVMCS1_FIELD(0x00006402, exit_io_instruction_ecx,
* HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE);
* EVMCS1_FIELD(0x00006404, exit_io_instruction_esi,
* HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE);
* EVMCS1_FIELD(0x00006406, exit_io_instruction_esi,
* HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE);
* EVMCS1_FIELD(0x00006408, exit_io_instruction_eip,
* HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE);
*/
EVMCS1_FIELD(GUEST_LINEAR_ADDRESS, guest_linear_address,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
/*
* No mask defined in the spec as Hyper-V doesn't currently support
* these. Future proof by resetting the whole clean field mask on
* access.
*/
EVMCS1_FIELD(VM_EXIT_MSR_STORE_ADDR, vm_exit_msr_store_addr,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
EVMCS1_FIELD(VM_EXIT_MSR_LOAD_ADDR, vm_exit_msr_load_addr,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
EVMCS1_FIELD(VM_ENTRY_MSR_LOAD_ADDR, vm_entry_msr_load_addr,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
EVMCS1_FIELD(CR3_TARGET_VALUE0, cr3_target_value0,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
EVMCS1_FIELD(CR3_TARGET_VALUE1, cr3_target_value1,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
EVMCS1_FIELD(CR3_TARGET_VALUE2, cr3_target_value2,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
EVMCS1_FIELD(CR3_TARGET_VALUE3, cr3_target_value3,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
/* 32 bit rw */
EVMCS1_FIELD(TPR_THRESHOLD, tpr_threshold,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
EVMCS1_FIELD(GUEST_INTERRUPTIBILITY_INFO, guest_interruptibility_info,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_BASIC),
EVMCS1_FIELD(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_PROC),
EVMCS1_FIELD(EXCEPTION_BITMAP, exception_bitmap,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EXCPN),
EVMCS1_FIELD(VM_ENTRY_CONTROLS, vm_entry_controls,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_ENTRY),
EVMCS1_FIELD(VM_ENTRY_INTR_INFO_FIELD, vm_entry_intr_info_field,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EVENT),
EVMCS1_FIELD(VM_ENTRY_EXCEPTION_ERROR_CODE,
vm_entry_exception_error_code,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EVENT),
EVMCS1_FIELD(VM_ENTRY_INSTRUCTION_LEN, vm_entry_instruction_len,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EVENT),
EVMCS1_FIELD(HOST_IA32_SYSENTER_CS, host_ia32_sysenter_cs,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
EVMCS1_FIELD(PIN_BASED_VM_EXEC_CONTROL, pin_based_vm_exec_control,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP1),
EVMCS1_FIELD(VM_EXIT_CONTROLS, vm_exit_controls,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP1),
EVMCS1_FIELD(SECONDARY_VM_EXEC_CONTROL, secondary_vm_exec_control,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP1),
EVMCS1_FIELD(GUEST_ES_LIMIT, guest_es_limit,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_CS_LIMIT, guest_cs_limit,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_SS_LIMIT, guest_ss_limit,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_DS_LIMIT, guest_ds_limit,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_FS_LIMIT, guest_fs_limit,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_GS_LIMIT, guest_gs_limit,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_LDTR_LIMIT, guest_ldtr_limit,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_TR_LIMIT, guest_tr_limit,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_GDTR_LIMIT, guest_gdtr_limit,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_IDTR_LIMIT, guest_idtr_limit,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_ES_AR_BYTES, guest_es_ar_bytes,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_CS_AR_BYTES, guest_cs_ar_bytes,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_SS_AR_BYTES, guest_ss_ar_bytes,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_DS_AR_BYTES, guest_ds_ar_bytes,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_FS_AR_BYTES, guest_fs_ar_bytes,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_GS_AR_BYTES, guest_gs_ar_bytes,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_LDTR_AR_BYTES, guest_ldtr_ar_bytes,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_TR_AR_BYTES, guest_tr_ar_bytes,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_ACTIVITY_STATE, guest_activity_state,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
EVMCS1_FIELD(GUEST_SYSENTER_CS, guest_sysenter_cs,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
/* 32 bit read only */
EVMCS1_FIELD(VM_INSTRUCTION_ERROR, vm_instruction_error,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
EVMCS1_FIELD(VM_EXIT_REASON, vm_exit_reason,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
EVMCS1_FIELD(VM_EXIT_INTR_INFO, vm_exit_intr_info,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
EVMCS1_FIELD(VM_EXIT_INTR_ERROR_CODE, vm_exit_intr_error_code,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
EVMCS1_FIELD(IDT_VECTORING_INFO_FIELD, idt_vectoring_info_field,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
EVMCS1_FIELD(IDT_VECTORING_ERROR_CODE, idt_vectoring_error_code,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
EVMCS1_FIELD(VM_EXIT_INSTRUCTION_LEN, vm_exit_instruction_len,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
EVMCS1_FIELD(VMX_INSTRUCTION_INFO, vmx_instruction_info,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
/* No mask defined in the spec (not used) */
EVMCS1_FIELD(PAGE_FAULT_ERROR_CODE_MASK, page_fault_error_code_mask,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
EVMCS1_FIELD(PAGE_FAULT_ERROR_CODE_MATCH, page_fault_error_code_match,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
EVMCS1_FIELD(CR3_TARGET_COUNT, cr3_target_count,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
EVMCS1_FIELD(VM_EXIT_MSR_STORE_COUNT, vm_exit_msr_store_count,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
EVMCS1_FIELD(VM_EXIT_MSR_LOAD_COUNT, vm_exit_msr_load_count,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
EVMCS1_FIELD(VM_ENTRY_MSR_LOAD_COUNT, vm_entry_msr_load_count,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
/* 16 bit rw */
EVMCS1_FIELD(HOST_ES_SELECTOR, host_es_selector,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
EVMCS1_FIELD(HOST_CS_SELECTOR, host_cs_selector,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
EVMCS1_FIELD(HOST_SS_SELECTOR, host_ss_selector,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
EVMCS1_FIELD(HOST_DS_SELECTOR, host_ds_selector,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
EVMCS1_FIELD(HOST_FS_SELECTOR, host_fs_selector,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
EVMCS1_FIELD(HOST_GS_SELECTOR, host_gs_selector,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
EVMCS1_FIELD(HOST_TR_SELECTOR, host_tr_selector,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
EVMCS1_FIELD(GUEST_ES_SELECTOR, guest_es_selector,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_CS_SELECTOR, guest_cs_selector,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_SS_SELECTOR, guest_ss_selector,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_DS_SELECTOR, guest_ds_selector,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_FS_SELECTOR, guest_fs_selector,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_GS_SELECTOR, guest_gs_selector,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_LDTR_SELECTOR, guest_ldtr_selector,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(GUEST_TR_SELECTOR, guest_tr_selector,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
EVMCS1_FIELD(VIRTUAL_PROCESSOR_ID, virtual_processor_id,
HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_XLAT),
};
const unsigned int nr_evmcs_1_fields = ARRAY_SIZE(vmcs_field_to_evmcs_1);
void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf)
{
vmcs_conf->pin_based_exec_ctrl &= ~EVMCS1_UNSUPPORTED_PINCTRL;
vmcs_conf->cpu_based_2nd_exec_ctrl &= ~EVMCS1_UNSUPPORTED_2NDEXEC;
vmcs_conf->vmexit_ctrl &= ~EVMCS1_UNSUPPORTED_VMEXIT_CTRL;
vmcs_conf->vmentry_ctrl &= ~EVMCS1_UNSUPPORTED_VMENTRY_CTRL;
}
#endif
bool nested_enlightened_vmentry(struct kvm_vcpu *vcpu, u64 *evmcs_gpa)
{
struct hv_vp_assist_page assist_page;
*evmcs_gpa = -1ull;
if (unlikely(!kvm_hv_get_assist_page(vcpu, &assist_page)))
return false;
if (unlikely(!assist_page.enlighten_vmentry))
return false;
*evmcs_gpa = assist_page.current_nested_vmcs;
return true;
}
uint16_t nested_get_evmcs_version(struct kvm_vcpu *vcpu)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
/*
* vmcs_version represents the range of supported Enlightened VMCS
* versions: lower 8 bits is the minimal version, higher 8 bits is the
* maximum supported version. KVM supports versions from 1 to
* KVM_EVMCS_VERSION.
*/
if (vmx->nested.enlightened_vmcs_enabled)
return (KVM_EVMCS_VERSION << 8) | 1;
return 0;
}
void nested_evmcs_filter_control_msr(u32 msr_index, u64 *pdata)
{
u32 ctl_low = (u32)*pdata;
u32 ctl_high = (u32)(*pdata >> 32);
/*
* Hyper-V 2016 and 2019 try using these features even when eVMCS
* is enabled but there are no corresponding fields.
*/
switch (msr_index) {
case MSR_IA32_VMX_EXIT_CTLS:
case MSR_IA32_VMX_TRUE_EXIT_CTLS:
ctl_high &= ~VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL;
break;
case MSR_IA32_VMX_ENTRY_CTLS:
case MSR_IA32_VMX_TRUE_ENTRY_CTLS:
ctl_high &= ~VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL;
break;
case MSR_IA32_VMX_PROCBASED_CTLS2:
ctl_high &= ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
break;
}
*pdata = ctl_low | ((u64)ctl_high << 32);
}
int nested_enable_evmcs(struct kvm_vcpu *vcpu,
uint16_t *vmcs_version)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
vmx->nested.enlightened_vmcs_enabled = true;
if (vmcs_version)
*vmcs_version = nested_get_evmcs_version(vcpu);
return 0;
}
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