Add KVM support to QEMU

This patch adds very basic KVM support.  KVM is a kernel module for Linux that
allows userspace programs to make use of hardware virtualization support.  It
current supports x86 hardware virtualization using Intel VT-x or AMD-V.  It
also supports IA64 VT-i, PPC 440, and S390.

This patch only implements the bare minimum support to get a guest booting.  It
has very little impact the rest of QEMU and attempts to integrate nicely with
the rest of QEMU.

Even though this implementation is basic, it is significantly faster than TCG.
Booting and shutting down a Linux guest:

w/TCG:  1:32.36 elapsed  84% CPU

w/KVM:  0:31.14 elapsed  59% CPU

Right now, KVM is disabled by default and must be explicitly enabled with
 -enable-kvm.  We can enable it by default later when we have had better
testing.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5627 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 7 insertions, 1 deletions

diff --git a/cpu-defs.h b/cpu-defs.h
index 5dcac74c34..46d4487811 100644
--- a/cpu-defs.h
+++ b/cpu-defs.h
@@ -142,6 +142,9 @@ typedef struct icount_decr_u16 {
 } icount_decr_u16;
 #endif
 
+struct kvm_run;
+struct KVMState;
+
 #define CPU_TEMP_BUF_NLONGS 128
 #define CPU_COMMON                                                      \
     struct TranslationBlock *current_tb; /* currently executing TB  */  \
@@ -199,6 +202,9 @@ typedef struct icount_decr_u16 {
     /* user data */                                                     \
     void *opaque;                                                       \
                                                                         \
-    const char *cpu_model_str;
+    const char *cpu_model_str;                                          \
+    struct KVMState *kvm_state;                                         \
+    struct kvm_run *kvm_run;                                            \
+    int kvm_fd;
 
 #endif