[PATCH RFC v12 06/21] pvh: Introduce PVH guest type

[George Dunlap <george.dunlap@eu.citrix.com>]

Introduce new PVH guest type, flags to create it, and ways to identify it.

To begin with, it will inherit functionality marked hvm_container.

Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com>
Signed-off-by: Mukesh Rathor <mukesh.rathor@oracle.com>
CC: Jan Beulich <jan.beulich@suse.com>
CC: Tim Deegan <tim@xen.org>
CC: Keir Fraser <keir@xen.org>
---
 xen/common/domain.c         |   11 +++++++++++
 xen/common/domctl.c         |   15 +++++++++++++--
 xen/include/public/domctl.h |    8 +++++++-
 xen/include/xen/sched.h     |   11 ++++++++++-
 4 files changed, 41 insertions(+), 4 deletions(-)

diff --git a/xen/common/domain.c b/xen/common/domain.c
index 38b1bad..2899021 100644
--- a/xen/common/domain.c
+++ b/xen/common/domain.c
@@ -237,6 +237,17 @@ struct domain *domain_create(
 
     if ( domcr_flags & DOMCRF_hvm )
         d->guest_type = guest_type_hvm;
+    else if ( domcr_flags & DOMCRF_pvh )
+    {
+        if ( !(domcr_flags & DOMCRF_hap) )
+        {
+            err = -EOPNOTSUPP;
+            printk(XENLOG_INFO "PVH guest must have HAP on\n");
+            goto fail;
+        }
+        d->guest_type = guest_type_pvh;
+        printk("Creating PVH guest d%d\n", d->domain_id);
+    }
 
     if ( domid == 0 )
     {
diff --git a/xen/common/domctl.c b/xen/common/domctl.c
index c653efb..04fcf47 100644
--- a/xen/common/domctl.c
+++ b/xen/common/domctl.c
@@ -187,6 +187,8 @@ void getdomaininfo(struct domain *d, struct xen_domctl_getdomaininfo *info)
 
     if ( is_hvm_domain(d) )
         info->flags |= XEN_DOMINF_hvm_guest;
+    else if ( is_pvh_domain(d) )
+        info->flags |= XEN_DOMINF_pvh_guest;
 
     xsm_security_domaininfo(d, info);
 
@@ -412,8 +414,11 @@ long do_domctl(XEN_GUEST_HANDLE_PARAM(xen_domctl_t) u_domctl)
         ret = -EINVAL;
         if ( supervisor_mode_kernel ||
              (op->u.createdomain.flags &
-             ~(XEN_DOMCTL_CDF_hvm_guest | XEN_DOMCTL_CDF_hap |
-               XEN_DOMCTL_CDF_s3_integrity | XEN_DOMCTL_CDF_oos_off)) )
+             ~(XEN_DOMCTL_CDF_hvm_guest
+               | XEN_DOMCTL_CDF_pvh_guest
+               | XEN_DOMCTL_CDF_hap
+               | XEN_DOMCTL_CDF_s3_integrity
+               | XEN_DOMCTL_CDF_oos_off)) )
             break;
 
         dom = op->domain;
@@ -440,9 +445,15 @@ long do_domctl(XEN_GUEST_HANDLE_PARAM(xen_domctl_t) u_domctl)
             rover = dom;
         }
 
+        if ( (op->u.createdomain.flags & XEN_DOMCTL_CDF_hvm_guest)
+             && (op->u.createdomain.flags & XEN_DOMCTL_CDF_pvh_guest) )
+            return -EINVAL;
+
         domcr_flags = 0;
         if ( op->u.createdomain.flags & XEN_DOMCTL_CDF_hvm_guest )
             domcr_flags |= DOMCRF_hvm;
+        if ( op->u.createdomain.flags & XEN_DOMCTL_CDF_pvh_guest )
+            domcr_flags |= DOMCRF_pvh;
         if ( op->u.createdomain.flags & XEN_DOMCTL_CDF_hap )
             domcr_flags |= DOMCRF_hap;
         if ( op->u.createdomain.flags & XEN_DOMCTL_CDF_s3_integrity )
diff --git a/xen/include/public/domctl.h b/xen/include/public/domctl.h
index 4c5b2bb..e471179 100644
--- a/xen/include/public/domctl.h
+++ b/xen/include/public/domctl.h
@@ -47,7 +47,7 @@ struct xen_domctl_createdomain {
     /* IN parameters */
     uint32_t ssidref;
     xen_domain_handle_t handle;
- /* Is this an HVM guest (as opposed to a PV guest)? */
+ /* Is this an HVM guest (as opposed to a PVH or PV guest)? */
 #define _XEN_DOMCTL_CDF_hvm_guest     0
 #define XEN_DOMCTL_CDF_hvm_guest      (1U<<_XEN_DOMCTL_CDF_hvm_guest)
  /* Use hardware-assisted paging if available? */
@@ -59,6 +59,9 @@ struct xen_domctl_createdomain {
  /* Disable out-of-sync shadow page tables? */
 #define _XEN_DOMCTL_CDF_oos_off       3
 #define XEN_DOMCTL_CDF_oos_off        (1U<<_XEN_DOMCTL_CDF_oos_off)
+ /* Is this a PVH guest (as opposed to an HVM or PV guest)? */
+#define _XEN_DOMCTL_CDF_pvh_guest     4
+#define XEN_DOMCTL_CDF_pvh_guest      (1U<<_XEN_DOMCTL_CDF_pvh_guest)
     uint32_t flags;
 };
 typedef struct xen_domctl_createdomain xen_domctl_createdomain_t;
@@ -89,6 +92,9 @@ struct xen_domctl_getdomaininfo {
  /* Being debugged.  */
 #define _XEN_DOMINF_debugged  6
 #define XEN_DOMINF_debugged   (1U<<_XEN_DOMINF_debugged)
+/* domain is PVH */
+#define _XEN_DOMINF_pvh_guest 7
+#define XEN_DOMINF_pvh_guest   (1U<<_XEN_DOMINF_pvh_guest)
  /* XEN_DOMINF_shutdown guest-supplied code.  */
 #define XEN_DOMINF_shutdownmask 255
 #define XEN_DOMINF_shutdownshift 16
diff --git a/xen/include/xen/sched.h b/xen/include/xen/sched.h
index d395087..c804925 100644
--- a/xen/include/xen/sched.h
+++ b/xen/include/xen/sched.h
@@ -238,8 +238,12 @@ struct mem_event_per_domain
     struct mem_event_domain access;
 };
 
+/*
+ * PVH is a PV guest running in an HVM container.  is_hvm_* checks
+ * will be false, but has_hvm_container_* checks will be true.
+ */
 enum guest_type {
-    guest_type_pv, guest_type_hvm
+    guest_type_pv, guest_type_pvh, guest_type_hvm
 };
 
 struct domain
@@ -468,6 +472,9 @@ struct domain *domain_create(
  /* DOMCRF_oos_off: dont use out-of-sync optimization for shadow page tables */
 #define _DOMCRF_oos_off         4
 #define DOMCRF_oos_off          (1U<<_DOMCRF_oos_off)
+ /* DOMCRF_pvh: Create PV domain in HVM container. */
+#define _DOMCRF_pvh            5
+#define DOMCRF_pvh             (1U<<_DOMCRF_pvh)
 
 /*
  * rcu_lock_domain_by_id() is more efficient than get_domain_by_id().
@@ -738,6 +745,8 @@ void watchdog_domain_destroy(struct domain *d);
 
 #define is_pv_domain(d) ((d)->guest_type == guest_type_pv)
 #define is_pv_vcpu(v)   (is_pv_domain((v)->domain))
+#define is_pvh_domain(d) ((d)->guest_type == guest_type_pvh)
+#define is_pvh_vcpu(v)   (is_pvh_domain((v)->domain))
 #define is_hvm_domain(d) ((d)->guest_type == guest_type_hvm)
 #define is_hvm_vcpu(v)   (is_hvm_domain(v->domain))
 #define has_hvm_container_domain(d) ((d)->guest_type != guest_type_pv)
-- 
1.7.9.5