After KVM commit 8a3caa6d74597c2a083f7c87f866891a0b12540b, kvm-kmod
is broken in weird ways (for me it breaks every other time kvm is
loaded, but only with ept=0...).
The reason is that, after this commit, empty_zero_page is expected
to be page-aligned, but the kvm-kmod compatibility shim isn't.
empty_zero_page has been exported since v2.6.25:
commit 8232fd625217dc641ed05dd238a8bb5c82828082
Author: Theodore Ts'o <tytso@xxxxxxx>
Date: Mon Nov 26 20:42:19 2007 +0100
x86: export the symbol empty_zero_page on the 32-bit x86 architecture
The latest KVM driver wants to use the empty_zero_page symbol, and it's
not exported in 32-bit x86 (although it is exported by x86_64, s390, and
uml architectures).
Signed-off-by: "Theodore Ts'o" <tytso@xxxxxxx>
Cc: tglx@xxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: kvm-devel@xxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
so the compatibility shim should probably just be dropped.
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
---
diff --git a/external-module-compat-comm.h b/external-module-compat-comm.h
index 34fb320..580aa9f 100644
--- a/external-module-compat-comm.h
+++ b/external-module-compat-comm.h
@@ -180,18 +180,6 @@ void kvm_smp_send_reschedule(int cpu);
#endif
-/* empty_zero_page isn't exported in all kernels */
-#include <asm/pgtable.h>
-
-#define empty_zero_page kvm_empty_zero_page
-
-static char empty_zero_page[PAGE_SIZE];
-
-static inline void blahblah(void)
-{
- (void)empty_zero_page[0];
-}
-
/* __mmdrop() is not exported before 2.6.25 */
#include <linux/sched.h>
--
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