[Qemu-devel] [PATCH] s390x/misc_helper.c: wrap s390_virtio_hypercall in BQL

[Aurelien Jarno]

s390_virtio_hypercall can trigger IO events and interrupts, most notably
when using virtio-ccw devices.

Signed-off-by: Aurelien Jarno <aurel...@aurel32.net>
---
 roms/qemu-palcode          | 2 +-
 roms/seabios               | 2 +-
 target/s390x/misc_helper.c | 2 ++
 3 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/roms/qemu-palcode b/roms/qemu-palcode
index f3c7e44c70..c87a92639b 160000
--- a/roms/qemu-palcode
+++ b/roms/qemu-palcode
@@ -1 +1 @@
-Subproject commit f3c7e44c70254975df2a00af39701eafbac4d471
+Subproject commit c87a92639b28ac42bc8f6c67443543b405dc479b
diff --git a/roms/seabios b/roms/seabios
index 5f4c7b13cd..e2fc41e24e 160000
--- a/roms/seabios
+++ b/roms/seabios
@@ -1 +1 @@
-Subproject commit 5f4c7b13cdf9c450eb55645f4362ea58fa61b79b
+Subproject commit e2fc41e24ee0ada60fc511d60b15a41b294538be
diff --git a/target/s390x/misc_helper.c b/target/s390x/misc_helper.c
index 4946b56ab3..aec737d707 100644
--- a/target/s390x/misc_helper.c
+++ b/target/s390x/misc_helper.c
@@ -307,7 +307,9 @@ void HELPER(diag)(CPUS390XState *env, uint32_t r1, uint32_t 
r3, uint32_t num)
     switch (num) {
     case 0x500:
         /* KVM hypercall */
+        qemu_mutex_lock_iothread();
         r = s390_virtio_hypercall(env);
+        qemu_mutex_unlock_iothread();
         break;
     case 0x44:
         /* yield */
-- 
2.11.0