[06/15] kvm/vmx: Set Tertiary VM-Execution control field When init vCPU's VMCS

Commit Message

Robert Hoo June 1, 2021, 8:47 a.m. UTC

Define the new 64bit VMCS field, as well as its auxiliary set function.
In init_vmcs(), set this field to the value previously configured.
But in vmx_exec_control(), at this moment, returning
vmcs_config.primary_exec_control with tertiary-exec artifially disabled,
as till now no real feature on it is enabled. This will be removed later in
Key Locker enablement patch.

Signed-off-by: Robert Hoo <[e-mail]>
---
 arch/x86/include/asm/vmx.h | 2 ++
 arch/x86/kvm/vmx/vmcs.h    | 1 +
 arch/x86/kvm/vmx/vmx.c     | 6 ++++++
 3 files changed, 9 insertions(+)

Patch

diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h
index c035649..dc549e3 100644
--- a/arch/x86/include/asm/vmx.h
+++ b/arch/x86/include/asm/vmx.h
@@ -222,6 +222,8 @@  enum vmcs_field {
 	ENCLS_EXITING_BITMAP_HIGH	= 0x0000202F,
 	TSC_MULTIPLIER                  = 0x00002032,
 	TSC_MULTIPLIER_HIGH             = 0x00002033,
+	TERTIARY_VM_EXEC_CONTROL        = 0x00002034,
+	TERTIARY_VM_EXEC_CONTROL_HIGH   = 0x00002035,
 	GUEST_PHYSICAL_ADDRESS          = 0x00002400,
 	GUEST_PHYSICAL_ADDRESS_HIGH     = 0x00002401,
 	VMCS_LINK_POINTER               = 0x00002800,
diff --git a/arch/x86/kvm/vmx/vmcs.h b/arch/x86/kvm/vmx/vmcs.h
index 1472c6c..343c329 100644
--- a/arch/x86/kvm/vmx/vmcs.h
+++ b/arch/x86/kvm/vmx/vmcs.h
@@ -48,6 +48,7 @@  struct vmcs_controls_shadow {
 	u32 pin;
 	u32 exec;
 	u32 secondary_exec;
+	u64 tertiary_exec;
 };
 
 /*
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 554e572..56a56f5 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -4255,6 +4255,9 @@  u32 vmx_exec_control(struct vcpu_vmx *vmx)
 				CPU_BASED_MONITOR_EXITING);
 	if (kvm_hlt_in_guest(vmx->vcpu.kvm))
 		exec_control &= ~CPU_BASED_HLT_EXITING;
+
+	/* Disable Tertiary-Exec Control at this moment, as no feature used yet */
+	exec_control &= ~CPU_BASED_ACTIVATE_TERTIARY_CONTROLS;
 	return exec_control;
 }
 
@@ -4413,6 +4416,9 @@  static void init_vmcs(struct vcpu_vmx *vmx)
 		secondary_exec_controls_set(vmx, vmx->secondary_exec_control);
 	}
 
+	if (cpu_has_tertiary_exec_ctrls())
+		tertiary_exec_controls_set(vmx, vmcs_config.cpu_based_3rd_exec_ctrl);
+
 	if (kvm_vcpu_apicv_active(&vmx->vcpu)) {
 		vmcs_write64(EOI_EXIT_BITMAP0, 0);
 		vmcs_write64(EOI_EXIT_BITMAP1, 0);