[Xen-devel] [PATCH 7 of 7 V4] libxl: Introduce a new guest config file parameter

[Wei Wang <wei.wang2@xxxxxxx>]

# HG changeset patch
# User Wei Wang <wei.wang2@xxxxxxx>
# Date 1327074009 -3600
# Node ID e71836563bfabed56c0140ad0bcaab517d82c894
# Parent  a768bb39d0bc64360055e7fce0e890be71920e63
libxl: Introduce a new guest config file parameter
Use guest_iommu = {1,0} to enable or disable guest iommu emulation.
Default value is 0.

Signed-off-by: Wei Wang <wei.wang2@xxxxxxx>

diff -r a768bb39d0bc -r e71836563bfa docs/man/xl.cfg.pod.5
--- a/docs/man/xl.cfg.pod.5     Fri Jan 20 14:40:32 2012 +0100
+++ b/docs/man/xl.cfg.pod.5     Fri Jan 20 16:40:09 2012 +0100
@@ -820,6 +820,10 @@ certainly belong in a more appropriate s

 Enable graphics device PCI passthrough. XXX which device is passed 
through ?
+=item B<guest_iommu=BOOLEAN>
+
+Enable virtual iommu device for hvm guest. It should be enabled to 
passthrough AMD GPGPU.
+
 =item B<nomigrate=BOOLEAN>

 Disable migration of this domain.  This enables certain other features
diff -r a768bb39d0bc -r e71836563bfa tools/libxl/libxl_create.c
--- a/tools/libxl/libxl_create.c        Fri Jan 20 14:40:32 2012 +0100
+++ b/tools/libxl/libxl_create.c        Fri Jan 20 16:40:09 2012 +0100
@@ -93,6 +93,7 @@ int libxl_init_build_info(libxl_ctx *ctx
         b_info->u.hvm.timer_mode = 1;
         b_info->u.hvm.nested_hvm = 0;
         b_info->u.hvm.no_incr_generationid = 0;
+        b_info->u.hvm.guest_iommu = 0;
         break;
     case LIBXL_DOMAIN_TYPE_PV:
         b_info->u.pv.slack_memkb = 8 * 1024;
@@ -183,13 +184,15 @@ int libxl__domain_build(libxl__gc *gc,
         vments[4] = "start_time";
         vments[5] = libxl__sprintf(gc, "%lu.%02d", 
start_time.tv_sec,(int)start_time.tv_usec/10000);
-        localents = libxl__calloc(gc, 7, sizeof(char *));
+        localents = libxl__calloc(gc, 9, sizeof(char *));
         localents[0] = "platform/acpi";
         localents[1] = (info->u.hvm.acpi) ? "1" : "0";
         localents[2] = "platform/acpi_s3";
         localents[3] = (info->u.hvm.acpi_s3) ? "1" : "0";
         localents[4] = "platform/acpi_s4";
         localents[5] = (info->u.hvm.acpi_s4) ? "1" : "0";
+        localents[6] = "guest_iommu";
+        localents[7] = (info->u.hvm.guest_iommu) ? "1" : "0";

         break;
     case LIBXL_DOMAIN_TYPE_PV:
diff -r a768bb39d0bc -r e71836563bfa tools/libxl/libxl_types.idl
--- a/tools/libxl/libxl_types.idl       Fri Jan 20 14:40:32 2012 +0100
+++ b/tools/libxl/libxl_types.idl       Fri Jan 20 16:40:09 2012 +0100
@@ -185,6 +185,7 @@ libxl_domain_build_info = Struct("domain
                                        ("timer_mode", integer),
                                        ("nested_hvm", bool),
                                        ("no_incr_generationid", bool),
+                                       ("guest_iommu", bool),
                                        ])),
                  ("pv", Struct(None, [("kernel", libxl_file_reference),
                                       ("slack_memkb", uint32),
diff -r a768bb39d0bc -r e71836563bfa tools/libxl/xl_cmdimpl.c
--- a/tools/libxl/xl_cmdimpl.c  Fri Jan 20 14:40:32 2012 +0100
+++ b/tools/libxl/xl_cmdimpl.c  Fri Jan 20 16:40:09 2012 +0100
@@ -768,6 +768,8 @@ static void parse_config_data(const char
             b_info->u.hvm.timer_mode = l;
         if (!xlu_cfg_get_long (config, "nestedhvm", &l, 0))
             b_info->u.hvm.nested_hvm = l;
+        if (!xlu_cfg_get_long (config, "guest_iommu", &l, 0))
+            b_info->u.hvm.guest_iommu = l;
         break;
     case LIBXL_DOMAIN_TYPE_PV:
     {
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