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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] Clean up domain_create() interface.
# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1213971686 -3600
# Node ID 926a366ca82f43ff1f9fd90bac435f4835b4dbf9
# Parent ad156e312aefd4deca7d968c13a6b9ed0ece45f8
Clean up domain_create() interface.
Signed-off-by: Keir Fraser <keir.fraser@xxxxxxxxxx>
---
xen/arch/ia64/xen/mm.c | 6 -
xen/arch/x86/mm.c | 4
xen/common/domain.c | 259 +++++++++++++++++++++++------------------------
xen/include/xen/domain.h | 3
xen/include/xen/sched.h | 12 +-
5 files changed, 143 insertions(+), 141 deletions(-)
diff -r ad156e312aef -r 926a366ca82f xen/arch/ia64/xen/mm.c
--- a/xen/arch/ia64/xen/mm.c Fri Jun 20 15:21:04 2008 +0100
+++ b/xen/arch/ia64/xen/mm.c Fri Jun 20 15:21:26 2008 +0100
@@ -207,7 +207,7 @@ alloc_dom_xen_and_dom_io(void)
* Any Xen-heap pages that we will allow to be mapped will have
* their domain field set to dom_xen.
*/
- dom_xen = alloc_domain(DOMID_XEN);
+ dom_xen = domain_create(DOMID_XEN, DOMCRF_dummy, 0);
BUG_ON(dom_xen == NULL);
/*
@@ -215,7 +215,7 @@ alloc_dom_xen_and_dom_io(void)
* This domain owns I/O pages that are within the range of the page_info
* array. Mappings occur at the priv of the caller.
*/
- dom_io = alloc_domain(DOMID_IO);
+ dom_io = domain_create(DOMID_IO, DOMCRF_dummy, 0);
BUG_ON(dom_io == NULL);
}
@@ -1553,7 +1553,7 @@ expose_p2m_init(void)
* Initialise our DOMID_P2M domain.
* This domain owns m2p table pages.
*/
- dom_p2m = alloc_domain(DOMID_P2M);
+ dom_p2m = domain_create(DOMID_P2M, DOMCRF_dummy, 0);
BUG_ON(dom_p2m == NULL);
dom_p2m->max_pages = ~0U;
diff -r ad156e312aef -r 926a366ca82f xen/arch/x86/mm.c
--- a/xen/arch/x86/mm.c Fri Jun 20 15:21:04 2008 +0100
+++ b/xen/arch/x86/mm.c Fri Jun 20 15:21:26 2008 +0100
@@ -219,7 +219,7 @@ void __init arch_init_memory(void)
* Any Xen-heap pages that we will allow to be mapped will have
* their domain field set to dom_xen.
*/
- dom_xen = alloc_domain(DOMID_XEN);
+ dom_xen = domain_create(DOMID_XEN, DOMCRF_dummy, 0);
BUG_ON(dom_xen == NULL);
/*
@@ -227,7 +227,7 @@ void __init arch_init_memory(void)
* This domain owns I/O pages that are within the range of the page_info
* array. Mappings occur at the priv of the caller.
*/
- dom_io = alloc_domain(DOMID_IO);
+ dom_io = domain_create(DOMID_IO, DOMCRF_dummy, 0);
BUG_ON(dom_io == NULL);
/* First 1MB of RAM is historically marked as I/O. */
diff -r ad156e312aef -r 926a366ca82f xen/common/domain.c
--- a/xen/common/domain.c Fri Jun 20 15:21:04 2008 +0100
+++ b/xen/common/domain.c Fri Jun 20 15:21:26 2008 +0100
@@ -73,21 +73,133 @@ int current_domain_id(void)
return current->domain->domain_id;
}
-struct domain *alloc_domain(domid_t domid)
+static struct domain *alloc_domain_struct(void)
+{
+ return xmalloc(struct domain);
+}
+
+static void free_domain_struct(struct domain *d)
+{
+ xfree(d);
+}
+
+static void __domain_finalise_shutdown(struct domain *d)
+{
+ struct vcpu *v;
+
+ BUG_ON(!spin_is_locked(&d->shutdown_lock));
+
+ if ( d->is_shut_down )
+ return;
+
+ for_each_vcpu ( d, v )
+ if ( !v->paused_for_shutdown )
+ return;
+
+ d->is_shut_down = 1;
+ send_guest_global_virq(dom0, VIRQ_DOM_EXC);
+}
+
+static void vcpu_check_shutdown(struct vcpu *v)
+{
+ struct domain *d = v->domain;
+
+ spin_lock(&d->shutdown_lock);
+
+ if ( d->is_shutting_down )
+ {
+ if ( !v->paused_for_shutdown )
+ vcpu_pause_nosync(v);
+ v->paused_for_shutdown = 1;
+ v->defer_shutdown = 0;
+ __domain_finalise_shutdown(d);
+ }
+
+ spin_unlock(&d->shutdown_lock);
+}
+
+struct vcpu *alloc_vcpu(
+ struct domain *d, unsigned int vcpu_id, unsigned int cpu_id)
+{
+ struct vcpu *v;
+
+ BUG_ON(d->vcpu[vcpu_id] != NULL);
+
+ if ( (v = alloc_vcpu_struct()) == NULL )
+ return NULL;
+
+ v->domain = d;
+ v->vcpu_id = vcpu_id;
+
+ v->runstate.state = is_idle_vcpu(v) ? RUNSTATE_running : RUNSTATE_offline;
+ v->runstate.state_entry_time = NOW();
+
+ if ( !is_idle_domain(d) )
+ {
+ set_bit(_VPF_down, &v->pause_flags);
+ v->vcpu_info = (void *)&shared_info(d, vcpu_info[vcpu_id]);
+ }
+
+ if ( sched_init_vcpu(v, cpu_id) != 0 )
+ {
+ free_vcpu_struct(v);
+ return NULL;
+ }
+
+ if ( vcpu_initialise(v) != 0 )
+ {
+ sched_destroy_vcpu(v);
+ free_vcpu_struct(v);
+ return NULL;
+ }
+
+ d->vcpu[vcpu_id] = v;
+ if ( vcpu_id != 0 )
+ d->vcpu[v->vcpu_id-1]->next_in_list = v;
+
+ /* Must be called after making new vcpu visible to for_each_vcpu(). */
+ vcpu_check_shutdown(v);
+
+ return v;
+}
+
+struct vcpu *alloc_idle_vcpu(unsigned int cpu_id)
{
struct domain *d;
-
- if ( (d = xmalloc(struct domain)) == NULL )
+ struct vcpu *v;
+ unsigned int vcpu_id = cpu_id % MAX_VIRT_CPUS;
+
+ if ( (v = idle_vcpu[cpu_id]) != NULL )
+ return v;
+
+ d = (vcpu_id == 0) ?
+ domain_create(IDLE_DOMAIN_ID, 0, 0) :
+ idle_vcpu[cpu_id - vcpu_id]->domain;
+ BUG_ON(d == NULL);
+
+ v = alloc_vcpu(d, vcpu_id, cpu_id);
+ idle_vcpu[cpu_id] = v;
+
+ return v;
+}
+
+struct domain *domain_create(
+ domid_t domid, unsigned int domcr_flags, ssidref_t ssidref)
+{
+ struct domain *d, **pd;
+ enum { INIT_xsm = 1u<<0, INIT_rangeset = 1u<<1, INIT_evtchn = 1u<<2,
+ INIT_gnttab = 1u<<3, INIT_arch = 1u<<4 };
+ int init_status = 0;
+
+ if ( (d = alloc_domain_struct()) == NULL )
return NULL;
memset(d, 0, sizeof(*d));
d->domain_id = domid;
if ( xsm_alloc_security_domain(d) != 0 )
- {
- free_domain(d);
- return NULL;
- }
+ goto fail;
+ init_status |= INIT_xsm;
atomic_set(&d->refcnt, 1);
spin_lock_init(&d->domain_lock);
@@ -97,132 +209,17 @@ struct domain *alloc_domain(domid_t domi
INIT_LIST_HEAD(&d->page_list);
INIT_LIST_HEAD(&d->xenpage_list);
- return d;
-}
-
-void free_domain(struct domain *d)
-{
- xsm_free_security_domain(d);
- xfree(d);
-}
-
-static void __domain_finalise_shutdown(struct domain *d)
-{
- struct vcpu *v;
-
- BUG_ON(!spin_is_locked(&d->shutdown_lock));
-
- if ( d->is_shut_down )
- return;
-
- for_each_vcpu ( d, v )
- if ( !v->paused_for_shutdown )
- return;
-
- d->is_shut_down = 1;
- send_guest_global_virq(dom0, VIRQ_DOM_EXC);
-}
-
-static void vcpu_check_shutdown(struct vcpu *v)
-{
- struct domain *d = v->domain;
-
- spin_lock(&d->shutdown_lock);
-
- if ( d->is_shutting_down )
- {
- if ( !v->paused_for_shutdown )
- vcpu_pause_nosync(v);
- v->paused_for_shutdown = 1;
- v->defer_shutdown = 0;
- __domain_finalise_shutdown(d);
- }
-
- spin_unlock(&d->shutdown_lock);
-}
-
-struct vcpu *alloc_vcpu(
- struct domain *d, unsigned int vcpu_id, unsigned int cpu_id)
-{
- struct vcpu *v;
-
- BUG_ON(d->vcpu[vcpu_id] != NULL);
-
- if ( (v = alloc_vcpu_struct()) == NULL )
- return NULL;
-
- v->domain = d;
- v->vcpu_id = vcpu_id;
-
- v->runstate.state = is_idle_vcpu(v) ? RUNSTATE_running : RUNSTATE_offline;
- v->runstate.state_entry_time = NOW();
-
- if ( !is_idle_domain(d) )
- {
- set_bit(_VPF_down, &v->pause_flags);
- v->vcpu_info = (void *)&shared_info(d, vcpu_info[vcpu_id]);
- }
-
- if ( sched_init_vcpu(v, cpu_id) != 0 )
- {
- free_vcpu_struct(v);
- return NULL;
- }
-
- if ( vcpu_initialise(v) != 0 )
- {
- sched_destroy_vcpu(v);
- free_vcpu_struct(v);
- return NULL;
- }
-
- d->vcpu[vcpu_id] = v;
- if ( vcpu_id != 0 )
- d->vcpu[v->vcpu_id-1]->next_in_list = v;
-
- /* Must be called after making new vcpu visible to for_each_vcpu(). */
- vcpu_check_shutdown(v);
-
- return v;
-}
-
-struct vcpu *alloc_idle_vcpu(unsigned int cpu_id)
-{
- struct domain *d;
- struct vcpu *v;
- unsigned int vcpu_id = cpu_id % MAX_VIRT_CPUS;
-
- if ( (v = idle_vcpu[cpu_id]) != NULL )
- return v;
-
- d = (vcpu_id == 0) ?
- domain_create(IDLE_DOMAIN_ID, 0, 0) :
- idle_vcpu[cpu_id - vcpu_id]->domain;
- BUG_ON(d == NULL);
-
- v = alloc_vcpu(d, vcpu_id, cpu_id);
- idle_vcpu[cpu_id] = v;
-
- return v;
-}
-
-struct domain *domain_create(
- domid_t domid, unsigned int domcr_flags, ssidref_t ssidref)
-{
- struct domain *d, **pd;
- enum { INIT_evtchn = 1, INIT_gnttab = 2, INIT_arch = 8 };
- int init_status = 0;
-
- if ( (d = alloc_domain(domid)) == NULL )
- return NULL;
-
if ( domcr_flags & DOMCRF_hvm )
d->is_hvm = 1;
if ( (domid == 0) && opt_dom0_vcpus_pin )
d->is_pinned = 1;
+ if ( domcr_flags & DOMCRF_dummy )
+ return d;
+
rangeset_domain_initialise(d);
+ init_status |= INIT_rangeset;
if ( !is_idle_domain(d) )
{
@@ -278,8 +275,11 @@ struct domain *domain_create(
grant_table_destroy(d);
if ( init_status & INIT_evtchn )
evtchn_destroy(d);
- rangeset_domain_destroy(d);
- free_domain(d);
+ if ( init_status & INIT_rangeset )
+ rangeset_domain_destroy(d);
+ if ( init_status & INIT_xsm )
+ xsm_free_security_domain(d);
+ free_domain_struct(d);
return NULL;
}
@@ -535,7 +535,8 @@ static void complete_domain_destroy(stru
if ( d->target != NULL )
put_domain(d->target);
- free_domain(d);
+ xsm_free_security_domain(d);
+ free_domain_struct(d);
send_guest_global_virq(dom0, VIRQ_DOM_EXC);
}
diff -r ad156e312aef -r 926a366ca82f xen/include/xen/domain.h
--- a/xen/include/xen/domain.h Fri Jun 20 15:21:04 2008 +0100
+++ b/xen/include/xen/domain.h Fri Jun 20 15:21:26 2008 +0100
@@ -15,9 +15,6 @@ int boot_vcpu(
struct domain *d, int vcpuid, vcpu_guest_context_u ctxt);
struct vcpu *alloc_idle_vcpu(unsigned int cpu_id);
void vcpu_reset(struct vcpu *v);
-
-struct domain *alloc_domain(domid_t domid);
-void free_domain(struct domain *d);
struct xen_domctl_getdomaininfo;
void getdomaininfo(struct domain *d, struct xen_domctl_getdomaininfo *info);
diff -r ad156e312aef -r 926a366ca82f xen/include/xen/sched.h
--- a/xen/include/xen/sched.h Fri Jun 20 15:21:04 2008 +0100
+++ b/xen/include/xen/sched.h Fri Jun 20 15:21:26 2008 +0100
@@ -315,10 +315,14 @@ struct domain *domain_create(
struct domain *domain_create(
domid_t domid, unsigned int domcr_flags, ssidref_t ssidref);
/* DOMCRF_hvm: Create an HVM domain, as opposed to a PV domain. */
-#define _DOMCRF_hvm 0
-#define DOMCRF_hvm (1U<<_DOMCRF_hvm)
-#define _DOMCRF_hap 1
-#define DOMCRF_hap (1U<<_DOMCRF_hap)
+#define _DOMCRF_hvm 0
+#define DOMCRF_hvm (1U<<_DOMCRF_hvm)
+ /* DOMCRF_hap: Create a domain with hardware-assisted paging. */
+#define _DOMCRF_hap 1
+#define DOMCRF_hap (1U<<_DOMCRF_hap)
+ /* DOMCRF_dummy: Create a dummy domain (not scheduled; not on domain list) */
+#define _DOMCRF_dummy 2
+#define DOMCRF_dummy (1U<<_DOMCRF_dummy)
int construct_dom0(
struct domain *d,
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