[Qemu-devel] [PATCH] x86: svm: Always clear event_inj on vmexit

[Jan Kiszka <jan.kiszka@siemens.com>]

We currently only clear SVM_EVTINJ_VALID after successful interrupt
delivery. This apparently does not match real hardware which clears the
whole event_inj field on every vmexit, including unsuccessful interrupt
delivery.

Reported-by: Erik van der Kouwe <vdkouwe@cs.vu.nl>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---

(before it gets lost)
Erik, please confirm that this works for you.

 target-i386/op_helper.c |    8 +-------
 1 files changed, 1 insertions(+), 7 deletions(-)

diff --git a/target-i386/op_helper.c b/target-i386/op_helper.c
index dcbdfe7..caabdb4 100644
--- a/target-i386/op_helper.c
+++ b/target-i386/op_helper.c
@@ -1263,13 +1263,6 @@ void do_interrupt(int intno, int is_int, int error_code,
 #endif
         do_interrupt_real(intno, is_int, error_code, next_eip);
     }
-
-#if !defined(CONFIG_USER_ONLY)
-    if (env->hflags & HF_SVMI_MASK) {
-	    uint32_t event_inj = ldl_phys(env->vm_vmcb + offsetof(struct vmcb, control.event_inj));
-	    stl_phys(env->vm_vmcb + offsetof(struct vmcb, control.event_inj), event_inj & ~SVM_EVTINJ_VALID);
-    }
-#endif
 }
 
 /* This should come from sysemu.h - if we could include it here... */
@@ -5388,6 +5381,7 @@ void helper_vmexit(uint32_t exit_code, uint64_t exit_info_1)
              ldl_phys(env->vm_vmcb + offsetof(struct vmcb, control.event_inj)));
     stl_phys(env->vm_vmcb + offsetof(struct vmcb, control.exit_int_info_err),
              ldl_phys(env->vm_vmcb + offsetof(struct vmcb, control.event_inj_err)));
+    stl_phys(env->vm_vmcb + offsetof(struct vmcb, control.event_inj), 0);
 
     env->hflags2 &= ~HF2_GIF_MASK;
     /* FIXME: Resets the current ASID register to zero (host ASID). */
-- 
1.6.0.2