Merge remote-tracking branch 'remotes/sstabellini/tags/xen-20170421-v…

…2-tag' into staging

Xen 2017/04/21 + fix

# gpg: Signature made Tue 25 Apr 2017 19:10:37 BST
# gpg:                using RSA key 0x894F8F4870E1AE90
# gpg: Good signature from "Stefano Stabellini <[email protected]>"
# gpg:                 aka "Stefano Stabellini <[email protected]>"
# Primary key fingerprint: D04E 33AB A51F 67BA 07D3  0AEA 894F 8F48 70E1 AE90

* remotes/sstabellini/tags/xen-20170421-v2-tag: (21 commits)
  move xen-mapcache.c to hw/i386/xen/
  move xen-hvm.c to hw/i386/xen/
  move xen-common.c to hw/xen/
  add xen-9p-backend to MAINTAINERS under Xen
  xen/9pfs: build and register Xen 9pfs backend
  xen/9pfs: send responses back to the frontend
  xen/9pfs: implement in/out_iov_from_pdu and vmarshal/vunmarshal
  xen/9pfs: receive requests from the frontend
  xen/9pfs: connect to the frontend
  xen/9pfs: introduce Xen 9pfs backend
  9p: introduce a type for the 9p header
  xen: import ring.h from xen
  configure: use pkg-config for obtaining xen version
  xen: additionally restrict xenforeignmemory operations
  xen: use libxendevice model to restrict operations
  xen: use 5 digit xen versions
  xen: use libxendevicemodel when available
  configure: detect presence of libxendevicemodel
  xen: create wrappers for all other uses of xc_hvm_XXX() functions
  xen: rename xen_modified_memory() to xen_hvm_modified_memory()
  ...

Signed-off-by: Peter Maydell <[email protected]>

MAINTAINERS

@@ -327,6 +327,7 @@ L: [email protected]
 S: Supported
 F: xen-*
 F: */xen*
+F: hw/9pfs/xen-9p-backend.c
 F: hw/char/xen_console.c
 F: hw/display/xenfb.c
 F: hw/net/xen_nic.c

Makefile.target

@@ -149,12 +149,6 @@ obj-y += dump.o
 obj-y += migration/ram.o migration/savevm.o
 LIBS := $(libs_softmmu) $(LIBS)
 
-# xen support
-obj-$(CONFIG_XEN) += xen-common.o
-obj-$(CONFIG_XEN_I386) += xen-hvm.o xen-mapcache.o
-obj-$(call lnot,$(CONFIG_XEN)) += xen-common-stub.o
-obj-$(call lnot,$(CONFIG_XEN_I386)) += xen-hvm-stub.o
-
 # Hardware support
 ifeq ($(TARGET_NAME), sparc64)
 obj-y += hw/sparc64/

configure

@@ -1997,30 +1997,65 @@ fi
 # xen probe
 
 if test "$xen" != "no" ; then
-  xen_libs="-lxenstore -lxenctrl -lxenguest"
-  xen_stable_libs="-lxenforeignmemory -lxengnttab -lxenevtchn"
+  # Check whether Xen library path is specified via --extra-ldflags to avoid
+  # overriding this setting with pkg-config output. If not, try pkg-config
+  # to obtain all needed flags.
+
+  if ! echo $EXTRA_LDFLAGS | grep tools/libxc > /dev/null && \
+     $pkg_config --exists xencontrol ; then
+    xen_ctrl_version="$(printf '%d%02d%02d' \
+      $($pkg_config --modversion xencontrol | sed 's/\./ /g') )"
+    xen=yes
+    xen_pc="xencontrol xenstore xenguest xenforeignmemory xengnttab"
+    xen_pc="$xen_pc xenevtchn xendevicemodel"
+    QEMU_CFLAGS="$QEMU_CFLAGS $($pkg_config --cflags $xen_pc)"
+    libs_softmmu="$($pkg_config --libs $xen_pc) $libs_softmmu"
+    LDFLAGS="$($pkg_config --libs $xen_pc) $LDFLAGS"
+  else
 
-  # First we test whether Xen headers and libraries are available.
-  # If no, we are done and there is no Xen support.
-  # If yes, more tests are run to detect the Xen version.
+    xen_libs="-lxenstore -lxenctrl -lxenguest"
+    xen_stable_libs="-lxencall -lxenforeignmemory -lxengnttab -lxenevtchn"
 
-  # Xen (any)
-  cat > $TMPC <<EOF
+    # First we test whether Xen headers and libraries are available.
+    # If no, we are done and there is no Xen support.
+    # If yes, more tests are run to detect the Xen version.
+
+    # Xen (any)
+    cat > $TMPC <<EOF
 #include <xenctrl.h>
 int main(void) {
   return 0;
 }
 EOF
-  if ! compile_prog "" "$xen_libs" ; then
-    # Xen not found
-    if test "$xen" = "yes" ; then
-      feature_not_found "xen" "Install xen devel"
-    fi
-    xen=no
+    if ! compile_prog "" "$xen_libs" ; then
+      # Xen not found
+      if test "$xen" = "yes" ; then
+        feature_not_found "xen" "Install xen devel"
+      fi
+      xen=no
+
+    # Xen unstable
+    elif
+        cat > $TMPC <<EOF &&
+#undef XC_WANT_COMPAT_DEVICEMODEL_API
+#define __XEN_TOOLS__
+#include <xendevicemodel.h>
+int main(void) {
+  xendevicemodel_handle *xd;
 
-  # Xen unstable
-  elif
-      cat > $TMPC <<EOF &&
+  xd = xendevicemodel_open(0, 0);
+  xendevicemodel_close(xd);
+
+  return 0;
+}
+EOF
+        compile_prog "" "$xen_libs -lxendevicemodel $xen_stable_libs"
+      then
+      xen_stable_libs="-lxendevicemodel $xen_stable_libs"
+      xen_ctrl_version=40900
+      xen=yes
+    elif
+        cat > $TMPC <<EOF &&
 /*
  * If we have stable libs the we don't want the libxc compat
  * layers, regardless of what CFLAGS we may have been given.
@@ -2070,12 +2105,12 @@ int main(void) {
   return 0;
 }
 EOF
-      compile_prog "" "$xen_libs $xen_stable_libs"
-    then
-    xen_ctrl_version=480
-    xen=yes
-  elif
-      cat > $TMPC <<EOF &&
+        compile_prog "" "$xen_libs $xen_stable_libs"
+      then
+      xen_ctrl_version=40800
+      xen=yes
+    elif
+        cat > $TMPC <<EOF &&
 /*
  * If we have stable libs the we don't want the libxc compat
  * layers, regardless of what CFLAGS we may have been given.
@@ -2121,12 +2156,12 @@ int main(void) {
   return 0;
 }
 EOF
-      compile_prog "" "$xen_libs $xen_stable_libs"
-    then
-    xen_ctrl_version=471
-    xen=yes
-  elif
-      cat > $TMPC <<EOF &&
+        compile_prog "" "$xen_libs $xen_stable_libs"
+      then
+      xen_ctrl_version=40701
+      xen=yes
+    elif
+        cat > $TMPC <<EOF &&
 #include <xenctrl.h>
 #include <stdint.h>
 int main(void) {
@@ -2136,14 +2171,14 @@ int main(void) {
   return 0;
 }
 EOF
-      compile_prog "" "$xen_libs"
-    then
-    xen_ctrl_version=470
-    xen=yes
-
-  # Xen 4.6
-  elif
-      cat > $TMPC <<EOF &&
+        compile_prog "" "$xen_libs"
+      then
+      xen_ctrl_version=40700
+      xen=yes
+
+    # Xen 4.6
+    elif
+        cat > $TMPC <<EOF &&
 #include <xenctrl.h>
 #include <xenstore.h>
 #include <stdint.h>
@@ -2164,14 +2199,14 @@ int main(void) {
   return 0;
 }
 EOF
-      compile_prog "" "$xen_libs"
-    then
-    xen_ctrl_version=460
-    xen=yes
-
-  # Xen 4.5
-  elif
-      cat > $TMPC <<EOF &&
+        compile_prog "" "$xen_libs"
+      then
+      xen_ctrl_version=40600
+      xen=yes
+
+    # Xen 4.5
+    elif
+        cat > $TMPC <<EOF &&
 #include <xenctrl.h>
 #include <xenstore.h>
 #include <stdint.h>
@@ -2191,13 +2226,13 @@ int main(void) {
   return 0;
 }
 EOF
-      compile_prog "" "$xen_libs"
-    then
-    xen_ctrl_version=450
-    xen=yes
+        compile_prog "" "$xen_libs"
+      then
+      xen_ctrl_version=40500
+      xen=yes
 
-  elif
-      cat > $TMPC <<EOF &&
+    elif
+        cat > $TMPC <<EOF &&
 #include <xenctrl.h>
 #include <xenstore.h>
 #include <stdint.h>
@@ -2216,24 +2251,25 @@ int main(void) {
   return 0;
 }
 EOF
-      compile_prog "" "$xen_libs"
-    then
-    xen_ctrl_version=420
-    xen=yes
+        compile_prog "" "$xen_libs"
+      then
+      xen_ctrl_version=40200
+      xen=yes
 
-  else
-    if test "$xen" = "yes" ; then
-      feature_not_found "xen (unsupported version)" \
-                        "Install a supported xen (xen 4.2 or newer)"
+    else
+      if test "$xen" = "yes" ; then
+        feature_not_found "xen (unsupported version)" \
+                          "Install a supported xen (xen 4.2 or newer)"
+      fi
+      xen=no
     fi
-    xen=no
-  fi
 
-  if test "$xen" = yes; then
-    if test $xen_ctrl_version -ge 471  ; then
-      libs_softmmu="$xen_stable_libs $libs_softmmu"
+    if test "$xen" = yes; then
+      if test $xen_ctrl_version -ge 40701  ; then
+        libs_softmmu="$xen_stable_libs $libs_softmmu"
+      fi
+      libs_softmmu="$xen_libs $libs_softmmu"
     fi
-    libs_softmmu="$xen_libs $libs_softmmu"
   fi
 fi
 

default-configs/i386-softmmu.mak

@@ -39,7 +39,6 @@ CONFIG_TPM_TIS=$(CONFIG_TPM)
 CONFIG_MC146818RTC=y
 CONFIG_PCI_PIIX=y
 CONFIG_WDT_IB700=y
-CONFIG_XEN_I386=$(CONFIG_XEN)
 CONFIG_ISA_DEBUG=y
 CONFIG_ISA_TESTDEV=y
 CONFIG_VMPORT=y

default-configs/x86_64-softmmu.mak

@@ -39,7 +39,6 @@ CONFIG_TPM_TIS=$(CONFIG_TPM)
 CONFIG_MC146818RTC=y
 CONFIG_PCI_PIIX=y
 CONFIG_WDT_IB700=y
-CONFIG_XEN_I386=$(CONFIG_XEN)
 CONFIG_ISA_DEBUG=y
 CONFIG_ISA_TESTDEV=y
 CONFIG_VMPORT=y

hw/9pfs/9p.h

@@ -119,6 +119,12 @@ static inline char *rpath(FsContext *ctx, const char *path)
 typedef struct V9fsPDU V9fsPDU;
 struct V9fsState;
 
+typedef struct {
+    uint32_t size_le;
+    uint8_t id;
+    uint16_t tag_le;
+} QEMU_PACKED P9MsgHeader;
+
 struct V9fsPDU
 {
     uint32_t size;

hw/9pfs/Makefile.objs

@@ -5,5 +5,6 @@ common-obj-y += coth.o cofs.o codir.o cofile.o
 common-obj-y += coxattr.o 9p-synth.o
 common-obj-$(CONFIG_OPEN_BY_HANDLE) +=  9p-handle.o
 common-obj-y += 9p-proxy.o
+common-obj-$(CONFIG_XEN) += xen-9p-backend.o
 
 obj-y += virtio-9p-device.o

hw/9pfs/virtio-9p-device.c

@@ -46,11 +46,7 @@ static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq)
     VirtQueueElement *elem;
 
     while ((pdu = pdu_alloc(s))) {
-        struct {
-            uint32_t size_le;
-            uint8_t id;
-            uint16_t tag_le;
-        } QEMU_PACKED out;
+        P9MsgHeader out;
 
         elem = virtqueue_pop(vq, sizeof(VirtQueueElement));
         if (!elem) {