[Xen-devel] [PATCH] libxl: support for "rtc_timeoffset" and "localtime"

[Lin Ming <mlin@xxxxxxxxxxxxx>]

Implement "rtc_timeoffset" and "localtime" options compatible as xm.

rtc_timeoffset is the offset between host time and guest time.
localtime means to specify whether the emulted RTC appears as UTC or is
offset by the host.

Signed-off-by: Lin Ming <mlin@xxxxxxxxxxxxx>
---
 tools/libxl/libxl_dom.c     |    3 +++
 tools/libxl/libxl_types.idl |    1 +
 tools/libxl/xl_cmdimpl.c    |   13 +++++++++++++
 tools/libxl/xl_sxp.c        |    1 +
 4 files changed, 18 insertions(+), 0 deletions(-)

diff --git a/tools/libxl/libxl_dom.c b/tools/libxl/libxl_dom.c
index 9b33267..0bdd654 100644
--- a/tools/libxl/libxl_dom.c
+++ b/tools/libxl/libxl_dom.c
@@ -91,6 +91,9 @@ int libxl__build_pre(libxl__gc *gc, uint32_t domid,
     if (libxl_defbool_val(info->disable_migrate))
         xc_domain_disable_migrate(ctx->xch, domid);
 
+    if (info->rtc_timeoffset)
+        xc_domain_set_time_offset(ctx->xch, domid, info->rtc_timeoffset);
+
     if (info->type == LIBXL_DOMAIN_TYPE_HVM) {
         unsigned long shadow;
         shadow = (info->shadow_memkb + 1023) / 1024;
diff --git a/tools/libxl/libxl_types.idl b/tools/libxl/libxl_types.idl
index 413a1a6..56f760c 100644
--- a/tools/libxl/libxl_types.idl
+++ b/tools/libxl/libxl_types.idl
@@ -238,6 +238,7 @@ libxl_domain_build_info = Struct("domain_build_info",[
     ("target_memkb",    MemKB),
     ("video_memkb",     MemKB),
     ("shadow_memkb",    MemKB),
+    ("rtc_timeoffset",  uint32),
     ("disable_migrate", libxl_defbool),
     ("cpuid",           libxl_cpuid_policy_list),
     
diff --git a/tools/libxl/xl_cmdimpl.c b/tools/libxl/xl_cmdimpl.c
index 1d59b89..b080a2b 100644
--- a/tools/libxl/xl_cmdimpl.c
+++ b/tools/libxl/xl_cmdimpl.c
@@ -697,6 +697,19 @@ static void parse_config_data(const char 
*configfile_filename_report,
         }
     }
 
+    if (!xlu_cfg_get_long(config, "rtc_timeoffset", &l, 0))
+        b_info->rtc_timeoffset = l;
+
+    if (!xlu_cfg_get_long(config, "localtime", &l, 0) && l) {
+        time_t t;
+        struct tm *tm;
+
+        t = time(NULL);
+        tm = localtime(&t);
+
+        b_info->rtc_timeoffset -= tm->tm_gmtoff;
+    }
+
     if (!xlu_cfg_get_long (config, "videoram", &l, 0))
         b_info->video_memkb = l * 1024;
 
diff --git a/tools/libxl/xl_sxp.c b/tools/libxl/xl_sxp.c
index c68b6df..bb1f3da 100644
--- a/tools/libxl/xl_sxp.c
+++ b/tools/libxl/xl_sxp.c
@@ -92,6 +92,7 @@ void printf_info_sexp(int domid, libxl_domain_config 
*d_config)
         printf("\t\t\t(firmware %s)\n", b_info->u.hvm.firmware);
         printf("\t\t\t(video_memkb %"PRId64")\n", b_info->video_memkb);
         printf("\t\t\t(shadow_memkb %"PRId64")\n", b_info->shadow_memkb);
+        printf("\t\t\t(rtc_timeoffset %"PRId32")\n", b_info->rtc_timeoffset);
         printf("\t\t\t(pae %s)\n", libxl_defbool_to_string(b_info->u.hvm.pae));
         printf("\t\t\t(apic %s)\n",
                libxl_defbool_to_string(b_info->u.hvm.apic));
-- 
1.7.2.5


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