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charset="utf-8" From: Elena Ufimtseva Signed-off-by: Elena Ufimtseva Signed-off-by: Jagannathan Raman Signed-off-by: John G Johnson Reviewed-by: Stefan Hajnoczi --- include/io/mpqemu-link.h | 4 ++++ io/mpqemu-link.c | 38 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 42 insertions(+) diff --git a/include/io/mpqemu-link.h b/include/io/mpqemu-link.h index e33181ad80..4bea5daeb4 100644 --- a/include/io/mpqemu-link.h +++ b/include/io/mpqemu-link.h @@ -15,6 +15,8 @@ #include "qemu/thread.h" #include "io/channel.h" #include "exec/hwaddr.h" +#include "io/channel-socket.h" +#include "hw/pci/proxy.h" =20 #define REMOTE_MAX_FDS 8 =20 @@ -65,6 +67,8 @@ typedef struct { int num_fds; } QEMU_PACKED MPQemuMsg; =20 +uint64_t mpqemu_msg_send_and_await_reply(MPQemuMsg *msg, PCIProxyDev *pdev, + Error **errp); void mpqemu_msg_send(MPQemuMsg *msg, QIOChannel *ioc, Error **errp); void mpqemu_msg_recv(MPQemuMsg *msg, QIOChannel *ioc, Error **errp); =20 diff --git a/io/mpqemu-link.c b/io/mpqemu-link.c index 8d966820a0..618061753b 100644 --- a/io/mpqemu-link.c +++ b/io/mpqemu-link.c @@ -17,6 +17,7 @@ #include "qemu/iov.h" #include "qemu/error-report.h" #include "qemu/main-loop.h" +#include "io/channel.h" =20 /* * Send message over the ioc QIOChannel. @@ -207,6 +208,43 @@ fail: } } =20 +/* + * Called from VCPU thread in non-coroutine context. + */ +uint64_t mpqemu_msg_send_and_await_reply(MPQemuMsg *msg, PCIProxyDev *pdev, + Error **errp) +{ + MPQemuMsg msg_reply =3D {0}; + uint64_t ret =3D UINT64_MAX; + Error *local_err =3D NULL; + + qemu_mutex_lock(&pdev->io_mutex); + mpqemu_msg_send(msg, pdev->ioc, &local_err); + if (local_err) { + error_propagate(errp, local_err); + goto exit_send; + } + + mpqemu_msg_recv(&msg_reply, pdev->ioc, &local_err); + if (local_err) { + error_propagate(errp, local_err); + goto exit_send; + } + + if (!mpqemu_msg_valid(&msg_reply) || msg_reply.cmd !=3D RET_MSG) { + error_setg(errp, "ERROR: Invalid reply received for command %d", + msg->cmd); + goto exit_send; + } else { + ret =3D msg_reply.data.u64; + } + + exit_send: + qemu_mutex_unlock(&pdev->io_mutex); + + return ret; +} + bool mpqemu_msg_valid(MPQemuMsg *msg) { if (msg->cmd >=3D MPQEMU_CMD_MAX && msg->cmd < 0) { --=20 2.25.GIT