[PATCH v2 6/7] tools/libxl: add vmtrace_pt_size parameter

[Michał Leszczyński <michal.leszczynski@xxxxxxx>]

Allow to specify the size of per-vCPU trace buffer upon
domain creation. This is zero by default (meaning: not enabled).

Signed-off-by: Michal Leszczynski <michal.leszczynski@xxxxxxx>
---
 tools/golang/xenlight/helpers.gen.go | 2 ++
 tools/golang/xenlight/types.gen.go   | 1 +
 tools/libxl/libxl_types.idl          | 2 ++
 tools/libxl/libxl_x86.c              | 5 +++++
 tools/xl/xl_parse.c                  | 4 ++++
 5 files changed, 14 insertions(+)

diff --git a/tools/golang/xenlight/helpers.gen.go 
b/tools/golang/xenlight/helpers.gen.go
index 935d3bc50a..986ebbd681 100644
--- a/tools/golang/xenlight/helpers.gen.go
+++ b/tools/golang/xenlight/helpers.gen.go
@@ -1117,6 +1117,7 @@ return fmt.Errorf("invalid union key '%v'", x.Type)}
 x.ArchArm.GicVersion = GicVersion(xc.arch_arm.gic_version)
 x.ArchArm.Vuart = VuartType(xc.arch_arm.vuart)
 x.Altp2M = Altp2MMode(xc.altp2m)
+x.VmtracePtSize = int(xc.vmtrace_pt_size)
 
  return nil}
 
@@ -1592,6 +1593,7 @@ return fmt.Errorf("invalid union key '%v'", x.Type)}
 xc.arch_arm.gic_version = C.libxl_gic_version(x.ArchArm.GicVersion)
 xc.arch_arm.vuart = C.libxl_vuart_type(x.ArchArm.Vuart)
 xc.altp2m = C.libxl_altp2m_mode(x.Altp2M)
+xc.vmtrace_pt_size = C.int(x.VmtracePtSize)
 
  return nil
  }
diff --git a/tools/golang/xenlight/types.gen.go 
b/tools/golang/xenlight/types.gen.go
index 663c1e86b4..41ec7cdd32 100644
--- a/tools/golang/xenlight/types.gen.go
+++ b/tools/golang/xenlight/types.gen.go
@@ -516,6 +516,7 @@ GicVersion GicVersion
 Vuart VuartType
 }
 Altp2M Altp2MMode
+VmtracePtSize int
 }
 
 type domainBuildInfoTypeUnion interface {
diff --git a/tools/libxl/libxl_types.idl b/tools/libxl/libxl_types.idl
index 9d3f05f399..04c1704b72 100644
--- a/tools/libxl/libxl_types.idl
+++ b/tools/libxl/libxl_types.idl
@@ -645,6 +645,8 @@ libxl_domain_build_info = Struct("domain_build_info",[
     # supported by x86 HVM and ARM support is planned.
     ("altp2m", libxl_altp2m_mode),
 
+    ("vmtrace_pt_size", integer),
+
     ], dir=DIR_IN,
        copy_deprecated_fn="libxl__domain_build_info_copy_deprecated",
 )
diff --git a/tools/libxl/libxl_x86.c b/tools/libxl/libxl_x86.c
index e57f63282e..14be2b395a 100644
--- a/tools/libxl/libxl_x86.c
+++ b/tools/libxl/libxl_x86.c
@@ -404,6 +404,11 @@ static int hvm_set_conf_params(libxl__gc *gc, uint32_t 
domid,
             libxl_defbool_val(info->u.hvm.altp2m))
             altp2m = libxl_defbool_val(info->u.hvm.altp2m);
 
+        if (xc_hvm_param_set(xch, domid, HVM_PARAM_VMTRACE_PT_SIZE,
+                             info->vmtrace_pt_size)) {
+            LOG(ERROR, "Couldn't set HVM_PARAM_VMTRACE_PT_SIZE");
+            goto out;
+        }
         if (xc_hvm_param_set(xch, domid, HVM_PARAM_HPET_ENABLED,
                              libxl_defbool_val(info->u.hvm.hpet))) {
             LOG(ERROR, "Couldn't set HVM_PARAM_HPET_ENABLED");
diff --git a/tools/xl/xl_parse.c b/tools/xl/xl_parse.c
index 61b4ef7b7e..6ab98dda55 100644
--- a/tools/xl/xl_parse.c
+++ b/tools/xl/xl_parse.c
@@ -1861,6 +1861,10 @@ void parse_config_data(const char *config_source,
         }
     }
 
+    if (!xlu_cfg_get_long(config, "vmtrace_pt_size", &l, 1)) {
+        b_info->vmtrace_pt_size = l;
+    }
+
     if (!xlu_cfg_get_list(config, "ioports", &ioports, &num_ioports, 0)) {
         b_info->num_ioports = num_ioports;
         b_info->ioports = calloc(num_ioports, sizeof(*b_info->ioports));
-- 
2.20.1