KVM: x86: Add a VALID_MASK for the flag in kvm_msr_filter

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>
Message-Id: <20220921151525.904162-4-aaronlewis@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/include/uapi/asm/kvm.h b/arch/x86/include/uapi/asm/kvm.h
index 73ad693..ae43246 100644 (file)
--- 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 9ba8c1b..5208b95 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -6441,7 +6441,7 @@ static int kvm_vm_ioctl_set_msr_filter(struct kvm *kvm,
        int r = 0;
        u32 i;
 
-       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++)