Rework the common CR4 and SREGS checks to return a bool instead of an
int, i.e. true/false instead of 0/-EINVAL, and add "is" to the name to
clarify the polarity of the return value (which is effectively inverted
by this change).
No functional changed intended.
Signed-off-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
---
arch/x86/kvm/svm/nested.c | 2 +-
arch/x86/kvm/vmx/vmx.c | 2 +-
arch/x86/kvm/x86.c | 28 ++++++++++++----------------
arch/x86/kvm/x86.h | 2 +-
4 files changed, 15 insertions(+), 19 deletions(-)
diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index ba50ff6e35c7..114e0e8561bc 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -254,7 +254,7 @@ static bool nested_vmcb_checks(struct vcpu_svm *svm, struct vmcb *vmcb12)
(vmcb12->save.cr3 & MSR_CR3_LONG_MBZ_MASK))
return false;
}
- if (kvm_valid_cr4(&svm->vcpu, vmcb12->save.cr4))
+ if (!kvm_is_valid_cr4(&svm->vcpu, vmcb12->save.cr4))
return false;
return nested_vmcb_check_controls(&vmcb12->control);
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 5aa0a3af7dbb..ac69aa3076d8 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -3081,7 +3081,7 @@ static bool vmx_is_valid_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
/*
* We operate under the default treatment of SMM, so VMX cannot be
* enabled under SMM. Note, whether or not VMXE is allowed at all is
- * handled by kvm_valid_cr4().
+ * handled by kvm_is_valid_cr4().
*/
if ((cr4 & X86_CR4_VMXE) && is_smm(vcpu))
return false;
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 64cc86f4f18f..5870aa6cbad2 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -965,20 +965,17 @@ int kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr)
}
EXPORT_SYMBOL_GPL(kvm_set_xcr);
-int kvm_valid_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
+bool kvm_is_valid_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
{
if (cr4 & cr4_reserved_bits)
- return -EINVAL;
+ return false;
if (cr4 & vcpu->arch.cr4_guest_rsvd_bits)
- return -EINVAL;
+ return false;
- if (!kvm_x86_ops.is_valid_cr4(vcpu, cr4))
- return -EINVAL;
-
- return 0;
+ return kvm_x86_ops.is_valid_cr4(vcpu, cr4);
}
-EXPORT_SYMBOL_GPL(kvm_valid_cr4);
+EXPORT_SYMBOL_GPL(kvm_is_valid_cr4);
int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
{
@@ -986,7 +983,7 @@ int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE |
X86_CR4_SMEP;
- if (kvm_valid_cr4(vcpu, cr4))
+ if (!kvm_is_valid_cr4(vcpu, cr4))
return 1;
if (is_long_mode(vcpu)) {
@@ -9422,7 +9419,7 @@ int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index,
}
EXPORT_SYMBOL_GPL(kvm_task_switch);
-static int kvm_valid_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
+static bool kvm_is_valid_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
{
if ((sregs->efer & EFER_LME) && (sregs->cr0 & X86_CR0_PG)) {
/*
@@ -9430,19 +9427,18 @@ static int kvm_valid_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
* 64-bit mode (though maybe in a 32-bit code segment).
* CR4.PAE and EFER.LMA must be set.
*/
- if (!(sregs->cr4 & X86_CR4_PAE)
- || !(sregs->efer & EFER_LMA))
- return -EINVAL;
+ if (!(sregs->cr4 & X86_CR4_PAE) || !(sregs->efer & EFER_LMA))
+ return false;
} else {
/*
* Not in 64-bit mode: EFER.LMA is clear and the code
* segment cannot be 64-bit.
*/
if (sregs->efer & EFER_LMA || sregs->cs.l)
- return -EINVAL;
+ return false;
}
- return kvm_valid_cr4(vcpu, sregs->cr4);
+ return kvm_is_valid_cr4(vcpu, sregs->cr4);
}
static int __set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
@@ -9454,7 +9450,7 @@ static int __set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
struct desc_ptr dt;
int ret = -EINVAL;
- if (kvm_valid_sregs(vcpu, sregs))
+ if (!kvm_is_valid_sregs(vcpu, sregs))
goto out;
apic_base_msr.data = sregs->apic_base;
diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h
index 3900ab0c6004..b3b1d237ffe5 100644
--- a/arch/x86/kvm/x86.h
+++ b/arch/x86/kvm/x86.h
@@ -369,7 +369,7 @@ static inline bool kvm_dr6_valid(u64 data)
void kvm_load_guest_xsave_state(struct kvm_vcpu *vcpu);
void kvm_load_host_xsave_state(struct kvm_vcpu *vcpu);
int kvm_spec_ctrl_test_value(u64 value);
-int kvm_valid_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
+bool kvm_is_valid_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
bool kvm_vcpu_exit_request(struct kvm_vcpu *vcpu);
int kvm_handle_memory_failure(struct kvm_vcpu *vcpu, int r,
struct x86_exception *e);
--
2.28.0
