[Xen-devel] [PATCH v4 4/5] domain: remove the 'is_xenstore' flag

[Paul Durrant <paul.durrant@xxxxxxxxxx>]

This patch introduces a convenience macro, is_xenstore_domain(), which
tests the domain 'options' directly and then uses that in place of
the 'is_xenstore' flag.

Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>
Reviewed-by: "Roger Pau Monné" <roger.pau@xxxxxxxxxx>
Acked-by: George Dunlap <George.Dunlap@xxxxxxxxxxxxx>
---
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Julien Grall <julien.grall@xxxxxxx>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
Cc: Tim Deegan <tim@xxxxxxx>
Cc: Wei Liu <wl@xxxxxxx>
Cc: Daniel De Graaf <dgdegra@xxxxxxxxxxxxx>

v2:
 - Set 'disable_migrate' to true rather 1
---
 xen/common/domain.c     | 9 +++------
 xen/common/domctl.c     | 2 +-
 xen/include/xen/sched.h | 7 +++++--
 xen/include/xsm/dummy.h | 2 +-
 4 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/xen/common/domain.c b/xen/common/domain.c
index 2df908285b..9b70626753 100644
--- a/xen/common/domain.c
+++ b/xen/common/domain.c
@@ -363,7 +363,7 @@ struct domain *domain_create(domid_t domid,
         if ( hardware_domid < 0 || hardware_domid >= DOMID_FIRST_RESERVED )
             panic("The value of hardware_dom must be a valid domain ID\n");
 
-        d->disable_migrate = 1;
+        d->disable_migrate = true;
         old_hwdom = hardware_domain;
         hardware_domain = d;
     }
@@ -442,11 +442,8 @@ struct domain *domain_create(domid_t domid,
         watchdog_domain_init(d);
         init_status |= INIT_watchdog;
 
-        if ( d->options & XEN_DOMCTL_CDF_xs_domain )
-        {
-            d->is_xenstore = 1;
-            d->disable_migrate = 1;
-        }
+        if ( is_xenstore_domain(d) )
+            d->disable_migrate = true;
 
         d->iomem_caps = rangeset_new(d, "I/O Memory", 
RANGESETF_prettyprint_hex);
         d->irq_caps   = rangeset_new(d, "Interrupts", 0);
diff --git a/xen/common/domctl.c b/xen/common/domctl.c
index 3d937434af..6436f8b287 100644
--- a/xen/common/domctl.c
+++ b/xen/common/domctl.c
@@ -186,7 +186,7 @@ void getdomaininfo(struct domain *d, struct 
xen_domctl_getdomaininfo *info)
         (d->is_shut_down                ? XEN_DOMINF_shutdown  : 0) |
         (d->controller_pause_count > 0  ? XEN_DOMINF_paused    : 0) |
         (d->debugger_attached           ? XEN_DOMINF_debugged  : 0) |
-        (d->is_xenstore                 ? XEN_DOMINF_xs_domain : 0) |
+        (is_xenstore_domain(d)          ? XEN_DOMINF_xs_domain : 0) |
         (is_hvm_domain(d)               ? XEN_DOMINF_hvm_guest : 0) |
         d->shutdown_code << XEN_DOMINF_shutdownshift;
 
diff --git a/xen/include/xen/sched.h b/xen/include/xen/sched.h
index cfe4f375e5..a62161cc54 100644
--- a/xen/include/xen/sched.h
+++ b/xen/include/xen/sched.h
@@ -375,8 +375,6 @@ struct domain
     bool             is_privileged;
     /* Can this guest access the Xen console? */
     bool             is_console;
-    /* Is this a xenstore domain (not dom0)? */
-    bool             is_xenstore;
     /* Non-migratable and non-restoreable? */
     bool             disable_migrate;
     /* Is this guest being debugged by dom0? */
@@ -978,6 +976,11 @@ static inline bool is_vcpu_online(const struct vcpu *v)
     return !test_bit(_VPF_down, &v->pause_flags);
 }
 
+static inline bool is_xenstore_domain(const struct domain *d)
+{
+    return d->options & XEN_DOMCTL_CDF_xs_domain;
+}
+
 extern bool sched_smt_power_savings;
 
 extern enum cpufreq_controller {
diff --git a/xen/include/xsm/dummy.h b/xen/include/xsm/dummy.h
index ef52bb1764..b8e185e6fa 100644
--- a/xen/include/xsm/dummy.h
+++ b/xen/include/xsm/dummy.h
@@ -79,7 +79,7 @@ static always_inline int xsm_default_action(
         {
             return 0;
     case XSM_XS_PRIV:
-            if ( src->is_xenstore )
+            if ( is_xenstore_domain(src) )
                 return 0;
         }
         /* fall through */
-- 
2.20.1.2.gb21ebb671


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