[Xen-devel] [PATCH 6 of 6 V5] libxl: Introduce a new guest config file parameter

[Wei Wang <wei.wang2@xxxxxxx>]

# HG changeset patch
# User Wei Wang <wei.wang2@xxxxxxx>
# Date 1328885360 -3600
# Node ID 09721a5ff84451b5a95d6cdc445867fa158dd449
# Parent  c39f5736e36429091839a8db10179deeb6b0c622
libxl: Introduce a new guest config file parameter
Use guest_iommu = {1,0} to enable or disable guest iommu emulation.
Default value is 0. Regression tests have been done to make sure
it does not break non-iommuv2 systems.

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

diff -r c39f5736e364 -r 09721a5ff844 docs/man/xl.cfg.pod.5
--- a/docs/man/xl.cfg.pod.5     Fri Feb 10 15:49:19 2012 +0100
+++ b/docs/man/xl.cfg.pod.5     Fri Feb 10 15:49:20 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 c39f5736e364 -r 09721a5ff844 tools/libxl/libxl_create.c
--- a/tools/libxl/libxl_create.c        Fri Feb 10 15:49:19 2012 +0100
+++ b/tools/libxl/libxl_create.c        Fri Feb 10 15:49:20 2012 +0100
@@ -100,6 +100,7 @@ int libxl_init_build_info(libxl_ctx *ctx
         b_info->u.hvm.vpt_align = 1;
         b_info->u.hvm.timer_mode = 1;
         b_info->u.hvm.nested_hvm = 0;
+        b_info->u.hvm.guest_iommu = 0;
         b_info->u.hvm.no_incr_generationid = 0;
 
         b_info->u.hvm.stdvga = 0;
@@ -169,13 +170,15 @@ 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 c39f5736e364 -r 09721a5ff844 tools/libxl/libxl_types.idl
--- a/tools/libxl/libxl_types.idl       Fri Feb 10 15:49:19 2012 +0100
+++ b/tools/libxl/libxl_types.idl       Fri Feb 10 15:49:20 2012 +0100
@@ -239,6 +239,7 @@ libxl_domain_build_info = Struct("domain
                                        ("vpt_align", bool),
                                        ("timer_mode", libxl_timer_mode),
                                        ("nested_hvm", bool),
+                                       ("guest_iommu", bool),
                                        ("no_incr_generationid", bool),
                                        ("nographic",        bool),
                                        ("stdvga",           bool),
diff -r c39f5736e364 -r 09721a5ff844 tools/libxl/xl_cmdimpl.c
--- a/tools/libxl/xl_cmdimpl.c  Fri Feb 10 15:49:19 2012 +0100
+++ b/tools/libxl/xl_cmdimpl.c  Fri Feb 10 15:49:20 2012 +0100
@@ -748,6 +748,8 @@ static void parse_config_data(const char
 
         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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