[PATCH v3 05/25] KVM: nVMX: Support several new fields in eVMCSv1

Vitaly Kuznetsov
2022-07-08T14:42:57Z

Enlightened VMCS v1 definition was updated with new fields, add
support for them for Hyper-V on KVM.

Note: SSP, CET and Guest LBR features are not supported by KVM yet
and 'struct vmcs12' has no corresponding fields.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
arch/x86/kvm/vmx/nested.c | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)

diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 778f82015f03..4fc84f0f5875 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -1603,6 +1603,10 @@ static void copy_enlightened_to_vmcs12(struct vcpu_vmx *vmx, u32 hv_clean_fields
vmcs12->guest_rflags = evmcs->guest_rflags;
vmcs12->guest_interruptibility_info =
evmcs->guest_interruptibility_info;
+ /*
+ * Not present in struct vmcs12:
+ * vmcs12->guest_ssp = evmcs->guest_ssp;
+ */
}

if (unlikely(!(hv_clean_fields &
@@ -1649,6 +1653,13 @@ static void copy_enlightened_to_vmcs12(struct vcpu_vmx *vmx, u32 hv_clean_fields
vmcs12->host_fs_selector = evmcs->host_fs_selector;
vmcs12->host_gs_selector = evmcs->host_gs_selector;
vmcs12->host_tr_selector = evmcs->host_tr_selector;
+ vmcs12->host_ia32_perf_global_ctrl = evmcs->host_ia32_perf_global_ctrl;
+ /*
+ * Not present in struct vmcs12:
+ * vmcs12->host_ia32_s_cet = evmcs->host_ia32_s_cet;
+ * vmcs12->host_ssp = evmcs->host_ssp;
+ * vmcs12->host_ia32_int_ssp_table_addr = evmcs->host_ia32_int_ssp_table_addr;
+ */
}

if (unlikely(!(hv_clean_fields &
@@ -1716,6 +1727,8 @@ static void copy_enlightened_to_vmcs12(struct vcpu_vmx *vmx, u32 hv_clean_fields
vmcs12->tsc_offset = evmcs->tsc_offset;
vmcs12->virtual_apic_page_addr = evmcs->virtual_apic_page_addr;
vmcs12->xss_exit_bitmap = evmcs->xss_exit_bitmap;
+ vmcs12->encls_exiting_bitmap = evmcs->encls_exiting_bitmap;
+ vmcs12->tsc_multiplier = evmcs->tsc_multiplier;
}

if (unlikely(!(hv_clean_fields &
@@ -1763,6 +1776,13 @@ static void copy_enlightened_to_vmcs12(struct vcpu_vmx *vmx, u32 hv_clean_fields
vmcs12->guest_bndcfgs = evmcs->guest_bndcfgs;
vmcs12->guest_activity_state = evmcs->guest_activity_state;
vmcs12->guest_sysenter_cs = evmcs->guest_sysenter_cs;
+ vmcs12->guest_ia32_perf_global_ctrl = evmcs->guest_ia32_perf_global_ctrl;
+ /*
+ * Not present in struct vmcs12:
+ * vmcs12->guest_ia32_s_cet = evmcs->guest_ia32_s_cet;
+ * vmcs12->guest_ia32_lbr_ctl = evmcs->guest_ia32_lbr_ctl;
+ * vmcs12->guest_ia32_int_ssp_table_addr = evmcs->guest_ia32_int_ssp_table_addr;
+ */
}

/*
@@ -1865,12 +1885,23 @@ static void copy_vmcs12_to_enlightened(struct vcpu_vmx *vmx)
* evmcs->vm_exit_msr_store_count = vmcs12->vm_exit_msr_store_count;
* evmcs->vm_exit_msr_load_count = vmcs12->vm_exit_msr_load_count;
* evmcs->vm_entry_msr_load_count = vmcs12->vm_entry_msr_load_count;
+ * evmcs->guest_ia32_perf_global_ctrl = vmcs12->guest_ia32_perf_global_ctrl;
+ * evmcs->host_ia32_perf_global_ctrl = vmcs12->host_ia32_perf_global_ctrl;
+ * evmcs->encls_exiting_bitmap = vmcs12->encls_exiting_bitmap;
+ * evmcs->tsc_multiplier = vmcs12->tsc_multiplier;
*
* Not present in struct vmcs12:
* evmcs->exit_io_instruction_ecx = vmcs12->exit_io_instruction_ecx;
* evmcs->exit_io_instruction_esi = vmcs12->exit_io_instruction_esi;
* evmcs->exit_io_instruction_edi = vmcs12->exit_io_instruction_edi;
* evmcs->exit_io_instruction_eip = vmcs12->exit_io_instruction_eip;
+ * evmcs->host_ia32_s_cet = vmcs12->host_ia32_s_cet;
+ * evmcs->host_ssp = vmcs12->host_ssp;
+ * evmcs->host_ia32_int_ssp_table_addr = vmcs12->host_ia32_int_ssp_table_addr;
+ * evmcs->guest_ia32_s_cet = vmcs12->guest_ia32_s_cet;
+ * evmcs->guest_ia32_lbr_ctl = vmcs12->guest_ia32_lbr_ctl;
+ * evmcs->guest_ia32_int_ssp_table_addr = vmcs12->guest_ia32_int_ssp_table_addr;
+ * evmcs->guest_ssp = vmcs12->guest_ssp;
*/

evmcs->guest_es_selector = vmcs12->guest_es_selector;
--
2.35.3