Useful helper for getting length of register given id.
Signed-off-by: Rusty Russell <rusty.russell@xxxxxxxxxx>
---
include/linux/kvm.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index d808694..8c3760e 100644
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -744,6 +744,8 @@ struct kvm_dirty_tlb {
#define KVM_REG_SIZE_U256 0x0050000000000000ULL
#define KVM_REG_SIZE_U512 0x0060000000000000ULL
#define KVM_REG_SIZE_U1024 0x0070000000000000ULL
+#define KVM_REG_SIZE(id) \
+ (1U << (((id) & KVM_REG_SIZE_MASK) >> KVM_REG_SIZE_SHIFT))
struct kvm_one_reg {
__u64 id;
--
1.7.9.5
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