KVM: Add fpu get/set operations

These are really helpful when migrating an floating point app to another
machine.

Signed-off-by: Avi Kivity <avi@qumranet.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index da9b23fa4b6..07bf353eeb6 100644
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -126,6 +126,21 @@ struct kvm_regs {
         __u64 rip, rflags;
 };
 
+/* for KVM_GET_FPU and KVM_SET_FPU */
+struct kvm_fpu {
+        __u8  fpr[8][16];
+        __u16 fcw;
+        __u16 fsw;
+        __u8  ftwx;  /* in fxsave format */
+        __u8  pad1;
+        __u16 last_opcode;
+        __u64 last_ip;
+        __u64 last_dp;
+        __u8  xmm[16][16];
+        __u32 mxcsr;
+        __u32 pad2;
+};
+
 struct kvm_segment {
         __u64 base;
         __u32 limit;
@@ -285,5 +300,7 @@ struct kvm_signal_mask {
 #define KVM_SET_MSRS              _IOW(KVMIO,  0x89, struct kvm_msrs)
 #define KVM_SET_CPUID             _IOW(KVMIO,  0x8a, struct kvm_cpuid)
 #define KVM_SET_SIGNAL_MASK       _IOW(KVMIO,  0x8b, struct kvm_signal_mask)
+#define KVM_GET_FPU               _IOR(KVMIO,  0x8c, struct kvm_fpu)
+#define KVM_SET_FPU               _IOW(KVMIO,  0x8d, struct kvm_fpu)
 
 #endif