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Re: [Xen-devel] [PATCH 2/2] libxl: introduce gfx_passthru_kind
On 2015/3/6 20:55, Wei Liu wrote:
On Fri, Mar 06, 2015 at 05:08:23PM +0800, Tiejun Chen wrote:
Although we already have 'gfx_passthru' in b_info, this doesn' suffice
after we want to handle IGD specifically. Now we define a new field of
type, gfx_passthru_kind, to indicate we're trying to pass IGD. Actually
this means we can benefit this to support other specific devices just
by extending gfx_passthru_kind. And then we can cooperate with
gfx_passthru to address IGD cases as follows:
gfx_passthru = 0 => sets build_info.u.gfx_passthru to false
gfx_passthru = 1 => sets build_info.u.gfx_passthru to false and
^^^^^
true?
I just simply pick up this from Campbell's comment but I agree you.
build_info.u.gfx_passthru_kind to DEFAULT
gfx_passthru = "igd" => sets build_info.u.gfx_passthru to false
and build_info.u.gfx_passthru_kind to IGD
Here if gfx_passthru_kind = DEFAULT, we will call
libxl__is_igd_vga_passthru() to check if we're hitting that table to need
to pass that option to qemu. But if gfx_passthru_kind = "igd" we always
force to pass that.
Signed-off-by: Tiejun Chen <tiejun.chen@xxxxxxxxx>
---
tools/libxl/libxl_dm.c | 13 +++++++++++++
tools/libxl/libxl_types.idl | 6 ++++++
tools/libxl/xl_cmdimpl.c | 19 +++++++++++++++++--
3 files changed, 36 insertions(+), 2 deletions(-)
diff --git a/tools/libxl/libxl_dm.c b/tools/libxl/libxl_dm.c
index 8599a6a..780dd2a 100644
--- a/tools/libxl/libxl_dm.c
+++ b/tools/libxl/libxl_dm.c
@@ -757,6 +757,19 @@ static char **
libxl__build_device_model_args_new(libxl__gc *gc,
machinearg, max_ram_below_4g);
}
}
+
+ if (b_info->u.hvm.gfx_passthru_kind ==
+ LIBXL_GFX_PASSTHRU_KIND_DEFAULT) {
+ if (libxl__is_igd_vga_passthru(gc, guest_config)) {
+ machinearg = GCSPRINTF("%s,igd-passthru=on", machinearg);
+ }
You can remove that {} around machinearg -- it's only one line after
`if'.
Okay.
+ } else if (b_info->u.hvm.gfx_passthru_kind ==
+ LIBXL_GFX_PASSTHRU_KIND_IGD) {
+ machinearg = GCSPRINTF("%s,igd-passthru=on", machinearg);
+ } else {
+ LOG(WARN, "gfx_passthru_kind is invalid so ignored.\n");
+ }
+
flexarray_append(dm_args, machinearg);
for (i = 0; b_info->extra_hvm && b_info->extra_hvm[i] != NULL; i++)
flexarray_append(dm_args, b_info->extra_hvm[i]);
diff --git a/tools/libxl/libxl_types.idl b/tools/libxl/libxl_types.idl
index 02be466..e209460 100644
--- a/tools/libxl/libxl_types.idl
+++ b/tools/libxl/libxl_types.idl
@@ -140,6 +140,11 @@ libxl_tsc_mode = Enumeration("tsc_mode", [
(3, "native_paravirt"),
])
+libxl_gfx_passthru_kind = Enumeration("gfx_passthru_kind", [
+ (0, "default"),
+ (1, "igd"),
+ ], init_val = "LIBXL_GFX_PASSTHRU_KIND_DEFAULT")
+
You don't need to set init_val if the default value is 0.
Got it.
# Consistent with the values defined for HVM_PARAM_TIMER_MODE.
libxl_timer_mode = Enumeration("timer_mode", [
(-1, "unknown"),
@@ -430,6 +435,7 @@ libxl_domain_build_info = Struct("domain_build_info",[
("spice", libxl_spice_info),
("gfx_passthru", libxl_defbool),
+ ("gfx_passthru_kind",
libxl_gfx_passthru_kind),
^^^^
One space is enough, I think.
Okay.
("serial", string),
("boot", string),
diff --git a/tools/libxl/xl_cmdimpl.c b/tools/libxl/xl_cmdimpl.c
index 440db78..3f7fede 100644
--- a/tools/libxl/xl_cmdimpl.c
+++ b/tools/libxl/xl_cmdimpl.c
@@ -1953,8 +1953,23 @@ skip_vfb:
xlu_cfg_replace_string (config, "spice_streaming_video",
&b_info->u.hvm.spice.streaming_video, 0);
xlu_cfg_get_defbool(config, "nographic", &b_info->u.hvm.nographic, 0);
- xlu_cfg_get_defbool(config, "gfx_passthru",
- &b_info->u.hvm.gfx_passthru, 0);
+ if (!xlu_cfg_get_long(config, "gfx_passthru", &l, 1)) {
+ if (!l) {
+ libxl_defbool_set(&b_info->u.hvm.gfx_passthru, false);
+ } else if (i == 1) {
+ libxl_defbool_set(&b_info->u.hvm.gfx_passthru, true);
+ } else {
+ fprintf(stderr, "ERROR: invalid value %ld for
\"gfx_passthru\"\n", l);
Please wrap this line to be < 80 column.
+ exit (1);
+ }
+ } else if (!xlu_cfg_get_string(config, "gfx_passthru", &buf, 0)) {
+ if (libxl_gfx_passthru_kind_from_string(buf,
&b_info->u.hvm.gfx_passthru_kind)) {
Ditto.
+ fprintf(stderr, "ERROR: invalid value \"%s\" for
\"gfx_passthru\"\n",
Ditto.
So,
@@ -1959,13 +1959,15 @@ skip_vfb:
} else if (i == 1) {
libxl_defbool_set(&b_info->u.hvm.gfx_passthru, true);
} else {
- fprintf(stderr, "ERROR: invalid value %ld for
\"gfx_passthru\"\n", l);
+ fprintf(stderr, "ERROR: invalid value %ld for"
+ " \"gfx_passthru\"\n", l);
exit (1);
}
} else if (!xlu_cfg_get_string(config, "gfx_passthru", &buf, 0)) {
- if (libxl_gfx_passthru_kind_from_string(buf,
&b_info->u.hvm.gfx_passthru_kind)) {
- fprintf(stderr, "ERROR: invalid value \"%s\" for
\"gfx_passthru\"\n",
- buf);
+ if (libxl_gfx_passthru_kind_from_string(buf,
+
&b_info->u.hvm.gfx_passthru_kind)) {
+ fprintf(stderr, "ERROR: invalid value \"%s\" for"
+ " \"gfx_passthru\"\n", buf);
exit (1);
}
libxl_defbool_set(&b_info->u.hvm.gfx_passthru, false);
Thanks
Tiejun
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