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[Qemu-devel] [PATCH v2] s390x/misc_helper.c: wrap s390_virtio_hypercall
From: |
Aurelien Jarno |
Subject: |
[Qemu-devel] [PATCH v2] s390x/misc_helper.c: wrap s390_virtio_hypercall in BQL |
Date: |
Mon, 24 Apr 2017 00:32:40 +0200 |
s390_virtio_hypercall can trigger IO events and interrupts, most notably
when using virtio-ccw devices.
Reviewed-by: Alexander Graf <address@hidden>
Signed-off-by: Aurelien Jarno <address@hidden>
---
target/s390x/misc_helper.c | 2 ++
1 file changed, 2 insertions(+)
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
- [Qemu-devel] [PATCH v2] s390x/misc_helper.c: wrap s390_virtio_hypercall in BQL,
Aurelien Jarno <=