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authorElena Ufimtseva <elena.ufimtseva@oracle.com>2021-01-29 11:46:21 -0500
committerStefan Hajnoczi <stefanha@redhat.com>2021-02-10 09:23:28 +0000
commitb6cc02d98fc6df49786608e5916f3de883a9461c (patch)
treed214f65c8e14f654b90f88f14965656238963f42
parent1bec145cd91c82b87ae715770f8961960b1d93b0 (diff)
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multi-process: perform device reset in the remote process
Perform device reset in the remote process when QEMU performs device reset. This is required to reset the internal state (like registers, etc...) of emulated devices Signed-off-by: Elena Ufimtseva <elena.ufimtseva@oracle.com> Signed-off-by: John G Johnson <john.g.johnson@oracle.com> Signed-off-by: Jagannathan Raman <jag.raman@oracle.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 7cb220a51f565dc0817bd76e2f540e89c2d2b850.1611938319.git.jag.raman@oracle.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
-rw-r--r--hw/remote/message.c22
-rw-r--r--hw/remote/proxy.c19
-rw-r--r--include/hw/remote/mpqemu-link.h1
3 files changed, 42 insertions, 0 deletions
diff --git a/hw/remote/message.c b/hw/remote/message.c
index adab040..11d7298 100644
--- a/hw/remote/message.c
+++ b/hw/remote/message.c
@@ -19,6 +19,7 @@
#include "exec/memattrs.h"
#include "hw/remote/memory.h"
#include "hw/remote/iohub.h"
+#include "sysemu/reset.h"
static void process_config_write(QIOChannel *ioc, PCIDevice *dev,
MPQemuMsg *msg, Error **errp);
@@ -26,6 +27,8 @@ static void process_config_read(QIOChannel *ioc, PCIDevice *dev,
MPQemuMsg *msg, Error **errp);
static void process_bar_write(QIOChannel *ioc, MPQemuMsg *msg, Error **errp);
static void process_bar_read(QIOChannel *ioc, MPQemuMsg *msg, Error **errp);
+static void process_device_reset_msg(QIOChannel *ioc, PCIDevice *dev,
+ Error **errp);
void coroutine_fn mpqemu_remote_msg_loop_co(void *data)
{
@@ -69,6 +72,9 @@ void coroutine_fn mpqemu_remote_msg_loop_co(void *data)
case MPQEMU_CMD_SET_IRQFD:
process_set_irqfd_msg(pci_dev, &msg);
break;
+ case MPQEMU_CMD_DEVICE_RESET:
+ process_device_reset_msg(com->ioc, pci_dev, &local_err);
+ break;
default:
error_setg(&local_err,
"Unknown command (%d) received for device %s"
@@ -206,3 +212,19 @@ fail:
getpid());
}
}
+
+static void process_device_reset_msg(QIOChannel *ioc, PCIDevice *dev,
+ Error **errp)
+{
+ DeviceClass *dc = DEVICE_GET_CLASS(dev);
+ DeviceState *s = DEVICE(dev);
+ MPQemuMsg ret = { 0 };
+
+ if (dc->reset) {
+ dc->reset(s);
+ }
+
+ ret.cmd = MPQEMU_CMD_RET;
+
+ mpqemu_msg_send(&ret, ioc, errp);
+}
diff --git a/hw/remote/proxy.c b/hw/remote/proxy.c
index a082709..4fa4be0 100644
--- a/hw/remote/proxy.c
+++ b/hw/remote/proxy.c
@@ -26,6 +26,7 @@
#include "util/event_notifier-posix.c"
static void probe_pci_info(PCIDevice *dev, Error **errp);
+static void proxy_device_reset(DeviceState *dev);
static void proxy_intx_update(PCIDevice *pci_dev)
{
@@ -202,6 +203,8 @@ static void pci_proxy_dev_class_init(ObjectClass *klass, void *data)
k->config_read = pci_proxy_read_config;
k->config_write = pci_proxy_write_config;
+ dc->reset = proxy_device_reset;
+
device_class_set_props(dc, proxy_properties);
}
@@ -358,3 +361,19 @@ static void probe_pci_info(PCIDevice *dev, Error **errp)
}
}
}
+
+static void proxy_device_reset(DeviceState *dev)
+{
+ PCIProxyDev *pdev = PCI_PROXY_DEV(dev);
+ MPQemuMsg msg = { 0 };
+ Error *local_err = NULL;
+
+ msg.cmd = MPQEMU_CMD_DEVICE_RESET;
+ msg.size = 0;
+
+ mpqemu_msg_send_and_await_reply(&msg, pdev, &local_err);
+ if (local_err) {
+ error_report_err(local_err);
+ }
+
+}
diff --git a/include/hw/remote/mpqemu-link.h b/include/hw/remote/mpqemu-link.h
index 71d206f..4ec0915 100644
--- a/include/hw/remote/mpqemu-link.h
+++ b/include/hw/remote/mpqemu-link.h
@@ -40,6 +40,7 @@ typedef enum {
MPQEMU_CMD_BAR_WRITE,
MPQEMU_CMD_BAR_READ,
MPQEMU_CMD_SET_IRQFD,
+ MPQEMU_CMD_DEVICE_RESET,
MPQEMU_CMD_MAX,
} MPQemuCmd;