From: Jan Kiszka <jan.kiszka@siemens.com>
Date: Wed, 2 Mar 2011 07:56:11 +0000 (+0100)
Subject: Synchronize VCPU states before reset
X-Git-Tag: v0.15.0-rc0~684^2~26
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=a7ada1510cb380b86c4811aa40fc45c8a7fc0daf;p=users%2Fdwmw2%2Fqemu.git

Synchronize VCPU states before reset

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>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---

diff --git a/vl.c b/vl.c
index 5e007a764c..f4c24d30dc 100644
--- a/vl.c
+++ b/vl.c
@@ -1450,6 +1450,7 @@ static void main_loop(void)
         }
         if (qemu_reset_requested()) {
             pause_all_vcpus();
+            cpu_synchronize_all_states();
             qemu_system_reset();
             resume_all_vcpus();
         }