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[v2,06/15] Synchronize VCPU states before reset

Message ID 64aa4f4fccc27cffc3568a3cf6903b5610e05d71.1298023878.git.jan.kiszka@siemens.com
State New
Headers show

Commit Message

Jan Kiszka Feb. 18, 2011, 10:11 a.m. UTC 
This is required to support keeping VCPU states across a system reset.
If we do not read the current state before the reset,
cpu_synchronize_all_post_reset may write back incorrect state
information.

The first user of this will be MCE MSR synchronization which currently
works around the missing cpu_synchronize_all_states.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
 vl.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
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Patch

diff --git a/vl.c b/vl.c
index b436952..7751843 100644
--- a/vl.c
+++ b/vl.c
@@ -1452,6 +1452,7 @@  static void main_loop(void)
         }
         if (qemu_reset_requested()) {
             pause_all_vcpus();
+            cpu_synchronize_all_states();
             qemu_system_reset();
             resume_all_vcpus();
         }