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Subject: [PATCH v8 27/28] vfio-user: add 'x-msg-timeout' option
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From: Jagannathan Raman <jag.raman@oracle.com>
By default, the vfio-user subsystem will wait 5 seconds for a message
reply from the server. Add an option to allow this to be configurable.
Originally-by: John Johnson <john.g.johnson@oracle.com>
Signed-off-by: Elena Ufimtseva <elena.ufimtseva@oracle.com>
Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
Signed-off-by: John Levon <john.levon@nutanix.com>
---
hw/vfio-user/common.c | 7 ++++---
hw/vfio-user/common.h | 1 +
hw/vfio-user/pci.c | 4 ++++
3 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/hw/vfio-user/common.c b/hw/vfio-user/common.c
index 38f8eef317..e44c8a2568 100644
--- a/hw/vfio-user/common.c
+++ b/hw/vfio-user/common.c
@@ -37,7 +37,6 @@
#define VFIO_USER_MAX_REGIONS 100
#define VFIO_USER_MAX_IRQS 50
=20
-static int wait_time =3D 5000; /* wait up to 5 sec for busy servers */
static IOThread *vfio_user_iothread;
=20
static void vfio_user_shutdown(VFIOUserProxy *proxy);
@@ -707,7 +706,8 @@ void vfio_user_send_wait(VFIOUserProxy *proxy, VFIOUser=
Hdr *hdr,
=20
if (ret =3D=3D 0) {
while (!msg->complete) {
- if (!qemu_cond_timedwait(&msg->cv, &proxy->lock, wait_time)) {
+ if (!qemu_cond_timedwait(&msg->cv, &proxy->lock,
+ proxy->wait_time)) {
VFIOUserMsgQ *list;
=20
list =3D msg->pending ? &proxy->pending : &proxy->outgoing;
@@ -740,7 +740,8 @@ void vfio_user_wait_reqs(VFIOUserProxy *proxy)
msg->type =3D VFIO_MSG_WAIT;
proxy->last_nowait =3D NULL;
while (!msg->complete) {
- if (!qemu_cond_timedwait(&msg->cv, &proxy->lock, wait_time)) {
+ if (!qemu_cond_timedwait(&msg->cv, &proxy->lock,
+ proxy->wait_time)) {
VFIOUserMsgQ *list;
=20
list =3D msg->pending ? &proxy->pending : &proxy->outgoing;
diff --git a/hw/vfio-user/common.h b/hw/vfio-user/common.h
index 72138220ba..9acf634ca7 100644
--- a/hw/vfio-user/common.h
+++ b/hw/vfio-user/common.h
@@ -62,6 +62,7 @@ typedef struct VFIOUserProxy {
uint64_t max_bitmap;
uint64_t migr_pgsize;
int flags;
+ uint32_t wait_time;
QemuCond close_cv;
AioContext *ctx;
QEMUBH *req_bh;
diff --git a/hw/vfio-user/pci.c b/hw/vfio-user/pci.c
index 8a05e69a46..fe096cc7a2 100644
--- a/hw/vfio-user/pci.c
+++ b/hw/vfio-user/pci.c
@@ -39,6 +39,7 @@ struct VFIOUserPCIDevice {
bool no_direct_dma; /* disable shared mem for DMA */
bool send_queued; /* all sends are queued */
bool no_post; /* all regions write are sync */
+ uint32_t wait_time; /* timeout for message replies */
};
=20
/*
@@ -274,6 +275,8 @@ static void vfio_user_pci_realize(PCIDevice *pdev, Erro=
r **errp)
if (udev->no_post) {
proxy->flags |=3D VFIO_PROXY_NO_POST;
}
+ /* user specified or 5 sec default */
+ proxy->wait_time =3D udev->wait_time;
=20
if (!vfio_user_validate_version(proxy, errp)) {
goto error;
@@ -409,6 +412,7 @@ static const Property vfio_user_pci_dev_properties[] =
=3D {
DEFINE_PROP_BOOL("no-direct-dma", VFIOUserPCIDevice, no_direct_dma, fa=
lse),
DEFINE_PROP_BOOL("x-send-queued", VFIOUserPCIDevice, send_queued, fals=
e),
DEFINE_PROP_BOOL("x-no-posted-writes", VFIOUserPCIDevice, no_post, fal=
se),
+ DEFINE_PROP_UINT32("x-msg-timeout", VFIOUserPCIDevice, wait_time, 5000=
),
};
=20
static void vfio_user_pci_dev_class_init(ObjectClass *klass, void *data)
--=20
2.34.1