OpenE2K/qemu-e2k
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multi-process: perform device reset in the remote process

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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>
This commit is contained in:
Elena Ufimtseva 2021-01-29 11:46:21 -05:00 committed by Stefan Hajnoczi
parent 1bec145cd9
commit b6cc02d98f
3 changed files with 42 additions and 0 deletions
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22
hw/remote/message.c
View File

@ -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);
}

19
hw/remote/proxy.c
View File

@ -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);
}
}

1
include/hw/remote/mpqemu-link.h
View File

@ -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;