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| author |   Vitaly Kuznetsov <vkuznets@redhat.com> | 2018-10-19 16:16:03 +0200 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2018-10-19 18:45:14 +0200 |
| commit | cbe3f898d159f4a6ed12121672c823b780df32d3 (patch) | |
| tree | 0078a25798a55c8b514601f204f65094b4f21a5c /arch/x86/kvm | |
| parent | selftests/kvm: add missing executables to .gitignore (diff) | |
| download | linux-dev-cbe3f898d159f4a6ed12121672c823b780df32d3.tar.xz linux-dev-cbe3f898d159f4a6ed12121672c823b780df32d3.zip | |
x86/kvm/nVMX: tweak shadow fields
It seems we have some leftovers from times when 'unrestricted guest'
wasn't exposed to L1. Stop shadowing GUEST_CS_{BASE,LIMIT,AR_SELECTOR}
and GUEST_ES_BASE, shadow GUEST_SS_AR_BYTES as it was found that some
hypervisors (e.g. Hyper-V without Enlightened VMCS) access it pretty
often.
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 10 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx_shadow_fields.h | 5 |
2 files changed, 6 insertions, 9 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index abeeb45d1c33..641a65b30685 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -12715,6 +12715,7 @@ static void prepare_vmcs02_full(struct vcpu_vmx *vmx, struct vmcs12 *vmcs12) if (!hv_evmcs || !(hv_evmcs->hv_clean_fields & HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2)) { vmcs_write16(GUEST_ES_SELECTOR, vmcs12->guest_es_selector); + vmcs_write16(GUEST_CS_SELECTOR, vmcs12->guest_cs_selector); vmcs_write16(GUEST_SS_SELECTOR, vmcs12->guest_ss_selector); vmcs_write16(GUEST_DS_SELECTOR, vmcs12->guest_ds_selector); vmcs_write16(GUEST_FS_SELECTOR, vmcs12->guest_fs_selector); @@ -12722,6 +12723,7 @@ static void prepare_vmcs02_full(struct vcpu_vmx *vmx, struct vmcs12 *vmcs12) vmcs_write16(GUEST_LDTR_SELECTOR, vmcs12->guest_ldtr_selector); vmcs_write16(GUEST_TR_SELECTOR, vmcs12->guest_tr_selector); vmcs_write32(GUEST_ES_LIMIT, vmcs12->guest_es_limit); + vmcs_write32(GUEST_CS_LIMIT, vmcs12->guest_cs_limit); vmcs_write32(GUEST_SS_LIMIT, vmcs12->guest_ss_limit); vmcs_write32(GUEST_DS_LIMIT, vmcs12->guest_ds_limit); vmcs_write32(GUEST_FS_LIMIT, vmcs12->guest_fs_limit); @@ -12731,12 +12733,13 @@ static void prepare_vmcs02_full(struct vcpu_vmx *vmx, struct vmcs12 *vmcs12) vmcs_write32(GUEST_GDTR_LIMIT, vmcs12->guest_gdtr_limit); vmcs_write32(GUEST_IDTR_LIMIT, vmcs12->guest_idtr_limit); vmcs_write32(GUEST_ES_AR_BYTES, vmcs12->guest_es_ar_bytes); - vmcs_write32(GUEST_SS_AR_BYTES, vmcs12->guest_ss_ar_bytes); vmcs_write32(GUEST_DS_AR_BYTES, vmcs12->guest_ds_ar_bytes); vmcs_write32(GUEST_FS_AR_BYTES, vmcs12->guest_fs_ar_bytes); vmcs_write32(GUEST_GS_AR_BYTES, vmcs12->guest_gs_ar_bytes); vmcs_write32(GUEST_LDTR_AR_BYTES, vmcs12->guest_ldtr_ar_bytes); vmcs_write32(GUEST_TR_AR_BYTES, vmcs12->guest_tr_ar_bytes); + vmcs_writel(GUEST_ES_BASE, vmcs12->guest_es_base); + vmcs_writel(GUEST_CS_BASE, vmcs12->guest_cs_base); vmcs_writel(GUEST_SS_BASE, vmcs12->guest_ss_base); vmcs_writel(GUEST_DS_BASE, vmcs12->guest_ds_base); vmcs_writel(GUEST_FS_BASE, vmcs12->guest_fs_base); @@ -12838,11 +12841,8 @@ static int prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12, */ if (!hv_evmcs || !(hv_evmcs->hv_clean_fields & HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2)) { - vmcs_write16(GUEST_CS_SELECTOR, vmcs12->guest_cs_selector); - vmcs_write32(GUEST_CS_LIMIT, vmcs12->guest_cs_limit); vmcs_write32(GUEST_CS_AR_BYTES, vmcs12->guest_cs_ar_bytes); - vmcs_writel(GUEST_ES_BASE, vmcs12->guest_es_base); - vmcs_writel(GUEST_CS_BASE, vmcs12->guest_cs_base); + vmcs_write32(GUEST_SS_AR_BYTES, vmcs12->guest_ss_ar_bytes); } if (vmx->nested.nested_run_pending && diff --git a/arch/x86/kvm/vmx_shadow_fields.h b/arch/x86/kvm/vmx_shadow_fields.h index cd0c75f6d037..132432f375c2 100644 --- a/arch/x86/kvm/vmx_shadow_fields.h +++ b/arch/x86/kvm/vmx_shadow_fields.h @@ -28,7 +28,6 @@ */ /* 16-bits */ -SHADOW_FIELD_RW(GUEST_CS_SELECTOR) SHADOW_FIELD_RW(GUEST_INTR_STATUS) SHADOW_FIELD_RW(GUEST_PML_INDEX) SHADOW_FIELD_RW(HOST_FS_SELECTOR) @@ -47,8 +46,8 @@ SHADOW_FIELD_RW(VM_ENTRY_EXCEPTION_ERROR_CODE) SHADOW_FIELD_RW(VM_ENTRY_INTR_INFO_FIELD) SHADOW_FIELD_RW(VM_ENTRY_INSTRUCTION_LEN) SHADOW_FIELD_RW(TPR_THRESHOLD) -SHADOW_FIELD_RW(GUEST_CS_LIMIT) SHADOW_FIELD_RW(GUEST_CS_AR_BYTES) +SHADOW_FIELD_RW(GUEST_SS_AR_BYTES) SHADOW_FIELD_RW(GUEST_INTERRUPTIBILITY_INFO) SHADOW_FIELD_RW(VMX_PREEMPTION_TIMER_VALUE) @@ -61,8 +60,6 @@ SHADOW_FIELD_RW(GUEST_CR0) SHADOW_FIELD_RW(GUEST_CR3) SHADOW_FIELD_RW(GUEST_CR4) SHADOW_FIELD_RW(GUEST_RFLAGS) -SHADOW_FIELD_RW(GUEST_CS_BASE) -SHADOW_FIELD_RW(GUEST_ES_BASE) SHADOW_FIELD_RW(CR0_GUEST_HOST_MASK) SHADOW_FIELD_RW(CR0_READ_SHADOW) SHADOW_FIELD_RW(CR4_READ_SHADOW) |