Patchwork [qom-cpu,1/7] kvm: Add fake KVM constants to avoid #ifdefs on KVM-specific code

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Submitter Eduardo Habkost
Date Jan. 7, 2013, 6:20 p.m.
Message ID <1357582848-16575-2-git-send-email-ehabkost@redhat.com>
Download mbox | patch
Permalink /patch/210026/
State New
Headers show

Comments

Eduardo Habkost - Jan. 7, 2013, 6:20 p.m.
Any KVM-specific code that use these constants must check if
kvm_enabled() is true before using them.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
Cc: kvm@vger.kernel.org
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Gleb Natapov <gleb@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
---
 include/sysemu/kvm.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

Patch

diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index 3db19ff..15f9658 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -21,6 +21,20 @@ 
 #ifdef CONFIG_KVM
 #include <linux/kvm.h>
 #include <linux/kvm_para.h>
+#else
+/* These constants must never be used at runtime if kvm_enabled() is false.
+ * They exist so we don't need #ifdefs around KVM-specific code that already
+ * checks kvm_enabled() properly.
+ */
+#define KVM_CPUID_SIGNATURE      0
+#define KVM_CPUID_FEATURES       0
+#define KVM_FEATURE_CLOCKSOURCE  0
+#define KVM_FEATURE_NOP_IO_DELAY 0
+#define KVM_FEATURE_MMU_OP       0
+#define KVM_FEATURE_CLOCKSOURCE2 0
+#define KVM_FEATURE_ASYNC_PF     0
+#define KVM_FEATURE_STEAL_TIME   0
+#define KVM_FEATURE_PV_EOI       0
 #endif
 
 extern int kvm_allowed;