diff mbox series

[v4,3/5] KVM: x86: Add a VALID_MASK for the flag in kvm_msr_filter

Message ID 20220921151525.904162-4-aaronlewis@google.com (mailing list archive)
State New, archived
Headers show
Series MSR filtering and MSR exiting flag clean up | expand

Commit Message

Aaron Lewis Sept. 21, 2022, 3:15 p.m. UTC 
Add the mask KVM_MSR_FILTER_VALID_MASK for the flag in the struct
kvm_msr_filter.  This makes it easier to introduce new flags in the
future.

No functional change intended.

Signed-off-by: Aaron Lewis <aaronlewis@google.com>
---
 arch/x86/include/uapi/asm/kvm.h | 1 +
 arch/x86/kvm/x86.c              | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/arch/x86/include/uapi/asm/kvm.h b/arch/x86/include/uapi/asm/kvm.h
index 73ad693aa653..ae4324674c49 100644
--- a/arch/x86/include/uapi/asm/kvm.h
+++ b/arch/x86/include/uapi/asm/kvm.h
@@ -226,6 +226,7 @@  struct kvm_msr_filter {
 #define KVM_MSR_FILTER_DEFAULT_ALLOW (0 << 0)
 #endif
 #define KVM_MSR_FILTER_DEFAULT_DENY  (1 << 0)
+#define KVM_MSR_FILTER_VALID_MASK (KVM_MSR_FILTER_DEFAULT_DENY)
 	__u32 flags;
 	struct kvm_msr_filter_range ranges[KVM_MSR_FILTER_MAX_RANGES];
 };
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 852614246825..670ae38f8f3e 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -6397,7 +6397,7 @@  static int kvm_vm_ioctl_set_msr_filter(struct kvm *kvm, void __user *argp)
 	if (copy_from_user(&filter, user_msr_filter, sizeof(filter)))
 		return -EFAULT;
 
-	if (filter.flags & ~KVM_MSR_FILTER_DEFAULT_DENY)
+	if (filter.flags & ~KVM_MSR_FILTER_VALID_MASK)
 		return -EINVAL;
 
 	for (i = 0; i < ARRAY_SIZE(filter.ranges); i++)