Mailing List Archive

From: Paul Durrant <pdurrant@amazon.com>

...to set the value of the 'disable_evtchn_fifo' flag in
libxl_domain_build_info.

Signed-off-by: Paul Durrant <pdurrant@amazon.com>
Signed-off-by: Eslam Elnikety <elnikety@amazon.com>
---
Cc: Ian Jackson <iwj@xenproject.org>
Cc: Wei Liu <wl@xen.org>
Cc: Anthony PERARD <anthony.perard@citrix.com>

v4:
- New in v4
---
docs/man/xl.cfg.5.pod.in | 8 ++++++++
tools/xl/xl_parse.c | 3 +++
2 files changed, 11 insertions(+)

diff --git a/docs/man/xl.cfg.5.pod.in b/docs/man/xl.cfg.5.pod.in
index 0532739c1fff..80d5e7aaf38f 100644
--- a/docs/man/xl.cfg.5.pod.in
+++ b/docs/man/xl.cfg.5.pod.in
@@ -1338,6 +1338,14 @@ FIFO-based event channel ABI support up to 131,071 event channels.
Other guests are limited to 4095 (64-bit x86 and ARM) or 1023 (32-bit
x86).

+=item B<disable_evtchn_fifo=BOOLEAN>
+
+Indicates if support for FIFO event channel operations (EVTCHNOP_init_control,
+EVTCHNOP_expand_array and EVTCHNOP_set_priority) are disabled. This can be
+used to work around issues with guests hibernated on a version of Xen
+prior to 4.4 and resumed on a version of Xen from 4.4. onwards. The default
+value is false.
+
=item B<vdispl=[ "VDISPL_SPEC_STRING", "VDISPL_SPEC_STRING", ...]>

Specifies the virtual display devices to be provided to the guest.
diff --git a/tools/xl/xl_parse.c b/tools/xl/xl_parse.c
index cae8eb679c5a..f79f644c4c2e 100644
--- a/tools/xl/xl_parse.c
+++ b/tools/xl/xl_parse.c
@@ -1569,6 +1569,9 @@ void parse_config_data(const char *config_source,
if (!xlu_cfg_get_long(config, "max_event_channels", &l, 0))
b_info->event_channels = l;

+ xlu_cfg_get_defbool(config, "disable_evtchn_fifo",
+ &b_info->disable_evtchn_fifo, 0);
+
xlu_cfg_replace_string (config, "kernel", &b_info->kernel, 0);
xlu_cfg_replace_string (config, "ramdisk", &b_info->ramdisk, 0);
xlu_cfg_replace_string (config, "device_tree", &b_info->device_tree, 0);
--
2.20.1