Set success rflags after emulating VMXON/VMXOFF in nested environment.
Re-arrange the code sequence of 3 functions,
nested_vmx_succeed()/failValid()/failInvalid(), to avoid double
declaration in the same file.
Signed-off-by: Arthur Chunqi Li <yzt...@gmail.com>
---
arch/x86/kvm/vmx.c | 85 ++++++++++++++++++++++++++--------------------------
1 file changed, 42 insertions(+), 43 deletions(-)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 260a919..423bc411 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -5551,8 +5551,47 @@ static void nested_free_all_saved_vmcss(struct vcpu_vmx
*vmx)
free_loaded_vmcs(&vmx->vmcs01);
}
+/*
+ * The following 3 functions, nested_vmx_succeed()/failValid()/failInvalid(),
+ * set the success or error code of an emulated VMX instruction, as specified
+ * by Vol 2B, VMX Instruction Reference, "Conventions".
+ */
+static void nested_vmx_succeed(struct kvm_vcpu *vcpu)
+{
+ vmx_set_rflags(vcpu, vmx_get_rflags(vcpu)
+ & ~(X86_EFLAGS_CF | X86_EFLAGS_PF | X86_EFLAGS_AF |
+ X86_EFLAGS_ZF | X86_EFLAGS_SF | X86_EFLAGS_OF));
+}
+
+static void nested_vmx_failInvalid(struct kvm_vcpu *vcpu)
+{
+ vmx_set_rflags(vcpu, (vmx_get_rflags(vcpu)
+ & ~(X86_EFLAGS_PF | X86_EFLAGS_AF | X86_EFLAGS_ZF |
+ X86_EFLAGS_SF | X86_EFLAGS_OF))
+ | X86_EFLAGS_CF);
+}
+
static void nested_vmx_failValid(struct kvm_vcpu *vcpu,
- u32 vm_instruction_error);
+ u32 vm_instruction_error)
+{
+ if (to_vmx(vcpu)->nested.current_vmptr == -1ull) {
+ /*
+ * failValid writes the error number to the current VMCS, which
+ * can't be done there isn't a current VMCS.
+ */
+ nested_vmx_failInvalid(vcpu);
+ return;
+ }
+ vmx_set_rflags(vcpu, (vmx_get_rflags(vcpu)
+ & ~(X86_EFLAGS_CF | X86_EFLAGS_PF | X86_EFLAGS_AF |
+ X86_EFLAGS_SF | X86_EFLAGS_OF))
+ | X86_EFLAGS_ZF);
+ get_vmcs12(vcpu)->vm_instruction_error = vm_instruction_error;
+ /*
+ * We don't need to force a shadow sync because
+ * VM_INSTRUCTION_ERROR is not shadowed
+ */
+}
/*
* Emulate the VMXON instruction.
@@ -5612,6 +5651,7 @@ static int handle_vmon(struct kvm_vcpu *vcpu)
vmx->nested.vmxon = true;
skip_emulated_instruction(vcpu);
+ nested_vmx_succeed(vcpu);
return 1;
}
@@ -5696,6 +5736,7 @@ static int handle_vmoff(struct kvm_vcpu *vcpu)
return 1;
free_nested(to_vmx(vcpu));
skip_emulated_instruction(vcpu);
+ nested_vmx_succeed(vcpu);
return 1;
}
@@ -5752,48 +5793,6 @@ static int get_vmx_mem_address(struct kvm_vcpu *vcpu,
return 0;
}
-/*
- * The following 3 functions, nested_vmx_succeed()/failValid()/failInvalid(),
- * set the success or error code of an emulated VMX instruction, as specified
- * by Vol 2B, VMX Instruction Reference, "Conventions".
- */
-static void nested_vmx_succeed(struct kvm_vcpu *vcpu)
-{
- vmx_set_rflags(vcpu, vmx_get_rflags(vcpu)
- & ~(X86_EFLAGS_CF | X86_EFLAGS_PF | X86_EFLAGS_AF |
- X86_EFLAGS_ZF | X86_EFLAGS_SF | X86_EFLAGS_OF));
-}
-
-static void nested_vmx_failInvalid(struct kvm_vcpu *vcpu)
-{
- vmx_set_rflags(vcpu, (vmx_get_rflags(vcpu)
- & ~(X86_EFLAGS_PF | X86_EFLAGS_AF | X86_EFLAGS_ZF |
- X86_EFLAGS_SF | X86_EFLAGS_OF))
- | X86_EFLAGS_CF);
-}
-
-static void nested_vmx_failValid(struct kvm_vcpu *vcpu,
- u32 vm_instruction_error)
-{
- if (to_vmx(vcpu)->nested.current_vmptr == -1ull) {
- /*
- * failValid writes the error number to the current VMCS, which
- * can't be done there isn't a current VMCS.
- */
- nested_vmx_failInvalid(vcpu);
- return;
- }
- vmx_set_rflags(vcpu, (vmx_get_rflags(vcpu)
- & ~(X86_EFLAGS_CF | X86_EFLAGS_PF | X86_EFLAGS_AF |
- X86_EFLAGS_SF | X86_EFLAGS_OF))
- | X86_EFLAGS_ZF);
- get_vmcs12(vcpu)->vm_instruction_error = vm_instruction_error;
- /*
- * We don't need to force a shadow sync because
- * VM_INSTRUCTION_ERROR is not shadowed
- */
-}
-
/* Emulate the VMCLEAR instruction */
static int handle_vmclear(struct kvm_vcpu *vcpu)
{
--
1.7.9.5
--
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