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authorIngo Molnar <mingo@elte.hu>2007-02-19 14:37:47 +0200
committerAvi Kivity <avi@qumranet.com>2007-03-04 11:12:40 +0200
commitc21415e84334af679630f6450ceb8929a5234fad (patch)
tree6f9ce30c9fd97a3fc94e79e1450fda86f612b56e /include/linux/kvm_para.h
parent102d8325a1d2f266d3d0a03fdde948544e72c12d (diff)
KVM: Add host hypercall support for vmx
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'include/linux/kvm_para.h')
-rw-r--r--include/linux/kvm_para.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/kvm_para.h b/include/linux/kvm_para.h
index 74be5c1002ec..3b292565a693 100644
--- a/include/linux/kvm_para.h
+++ b/include/linux/kvm_para.h
@@ -52,4 +52,22 @@ struct kvm_vcpu_para_state {
#define KVM_EINVAL 1
+/*
+ * Hypercall calling convention:
+ *
+ * Each hypercall may have 0-6 parameters.
+ *
+ * 64-bit hypercall index is in RAX, goes from 0 to __NR_hypercalls-1
+ *
+ * 64-bit parameters 1-6 are in the standard gcc x86_64 calling convention
+ * order: RDI, RSI, RDX, RCX, R8, R9.
+ *
+ * 32-bit index is EBX, parameters are: EAX, ECX, EDX, ESI, EDI, EBP.
+ * (the first 3 are according to the gcc regparm calling convention)
+ *
+ * No registers are clobbered by the hypercall, except that the
+ * return value is in RAX.
+ */
+#define __NR_hypercalls 0
+
#endif