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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v6 4/4] Introduce the pvcalls header
Define the ring and request and response structs according to the
specification. Use the new DEFINE_XEN_FLEX_RING macro.
Add the header to the C99 check.
Signed-off-by: Stefano Stabellini <stefano@xxxxxxxxxxx>
CC: JBeulich@xxxxxxxx
CC: konrad.wilk@xxxxxxxxxx
---
xen/include/Makefile | 4 +-
xen/include/public/io/pvcalls.h | 153 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 156 insertions(+), 1 deletion(-)
create mode 100644 xen/include/public/io/pvcalls.h
diff --git a/xen/include/Makefile b/xen/include/Makefile
index a3b3583..d31b21d 100644
--- a/xen/include/Makefile
+++ b/xen/include/Makefile
@@ -94,11 +94,13 @@ all: headers.chk headers99.chk headers++.chk
PUBLIC_HEADERS := $(filter-out public/arch-% public/dom0_ops.h, $(wildcard
public/*.h public/*/*.h) $(public-y))
-PUBLIC_C99_HEADERS := public/io/9pfs.h
+PUBLIC_C99_HEADERS := public/io/9pfs.h public/io/pvcalls.h
PUBLIC_ANSI_HEADERS := $(filter-out public/%ctl.h public/xsm/%
public/%hvm/save.h $(PUBLIC_C99_HEADERS), $(PUBLIC_HEADERS))
public/io/9pfs.h-c99-prereq := -include string.h
public/io/9pfs.h-cxx-prereq := -include cstring
+public/io/pvcalls.h-c99-prereq := -include string.h
+public/io/pvcalls.h-cxx-prereq := -include cstring
headers.chk: $(PUBLIC_ANSI_HEADERS) Makefile
for i in $(filter %.h,$^); do \
diff --git a/xen/include/public/io/pvcalls.h b/xen/include/public/io/pvcalls.h
new file mode 100644
index 0000000..cb81712
--- /dev/null
+++ b/xen/include/public/io/pvcalls.h
@@ -0,0 +1,153 @@
+/*
+ * pvcalls.h -- Xen PV Calls Protocol
+ *
+ * Refer to docs/misc/pvcalls.markdown for the specification
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Copyright (C) 2017 Stefano Stabellini <stefano@xxxxxxxxxxx>
+ */
+
+#ifndef __XEN_PUBLIC_IO_PVCALLS_H__
+#define __XEN_PUBLIC_IO_PVCALLS_H__
+
+#include "../grant_table.h"
+#include "ring.h"
+
+/*
+ * See docs/misc/pvcalls.markdown in xen.git for the full specification:
+ * https://xenbits.xen.org/docs/unstable/misc/pvcalls.html
+ */
+struct pvcalls_data_intf {
+ RING_IDX in_cons, in_prod, in_error;
+
+ uint8_t pad1[52];
+
+ RING_IDX out_cons, out_prod, out_error;
+
+ uint8_t pad2[52];
+
+ RING_IDX ring_order;
+ grant_ref_t ref[];
+};
+DEFINE_XEN_FLEX_RING(pvcalls);
+
+#define PVCALLS_SOCKET 0
+#define PVCALLS_CONNECT 1
+#define PVCALLS_RELEASE 2
+#define PVCALLS_BIND 3
+#define PVCALLS_LISTEN 4
+#define PVCALLS_ACCEPT 5
+#define PVCALLS_POLL 6
+
+struct xen_pvcalls_request {
+ uint32_t req_id; /* private to guest, echoed in response */
+ uint32_t cmd; /* command to execute */
+ union {
+ struct xen_pvcalls_socket {
+ uint64_t id;
+ uint32_t domain;
+ uint32_t type;
+ uint32_t protocol;
+ } socket;
+ struct xen_pvcalls_connect {
+ uint64_t id;
+ uint8_t addr[28];
+ uint32_t len;
+ uint32_t flags;
+ grant_ref_t ref;
+ uint32_t evtchn;
+ } connect;
+ struct xen_pvcalls_release {
+ uint64_t id;
+ uint8_t reuse;
+ } release;
+ struct xen_pvcalls_bind {
+ uint64_t id;
+ uint8_t addr[28];
+ uint32_t len;
+ } bind;
+ struct xen_pvcalls_listen {
+ uint64_t id;
+ uint32_t backlog;
+ } listen;
+ struct xen_pvcalls_accept {
+ uint64_t id;
+ uint64_t id_new;
+ grant_ref_t ref;
+ uint32_t evtchn;
+ } accept;
+ struct xen_pvcalls_poll {
+ uint64_t id;
+ } poll;
+ /* dummy member to force sizeof(struct xen_pvcalls_request)
+ * to match across archs */
+ struct xen_pvcalls_dummy {
+ uint8_t dummy[56];
+ } dummy;
+ } u;
+};
+
+struct xen_pvcalls_response {
+ uint32_t req_id;
+ uint32_t cmd;
+ int32_t ret;
+ uint32_t pad;
+ union {
+ struct _xen_pvcalls_socket {
+ uint64_t id;
+ } socket;
+ struct _xen_pvcalls_connect {
+ uint64_t id;
+ } connect;
+ struct _xen_pvcalls_release {
+ uint64_t id;
+ } release;
+ struct _xen_pvcalls_bind {
+ uint64_t id;
+ } bind;
+ struct _xen_pvcalls_listen {
+ uint64_t id;
+ } listen;
+ struct _xen_pvcalls_accept {
+ uint64_t id;
+ } accept;
+ struct _xen_pvcalls_poll {
+ uint64_t id;
+ } poll;
+ struct _xen_pvcalls_dummy {
+ uint8_t dummy[8];
+ } dummy;
+ } u;
+};
+
+DEFINE_RING_TYPES(xen_pvcalls, struct xen_pvcalls_request,
+ struct xen_pvcalls_response);
+
+#endif
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
--
1.9.1
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