[PATCH 20/23] PVH xen: HVM support of PVH guest creation/destruction

[Mukesh Rathor <mukesh.rathor@oracle.com>]

This patch implements the HVM portion of the guest create, ie
vcpu and domain initilization. Some changes to support the destroy path.

Signed-off-by: Mukesh Rathor <mukesh.rathor@oracle.com>
---
 xen/arch/x86/hvm/hvm.c |   67 ++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 65 insertions(+), 2 deletions(-)

diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index 0be98a1..a21391f 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -510,6 +510,30 @@ static int hvm_print_line(
     return X86EMUL_OKAY;
 }
 
+static int pvh_dom_initialise(struct domain *d)
+{
+    int rc;
+
+    if ( !d->arch.hvm_domain.hap_enabled )
+        return -EINVAL;
+
+    spin_lock_init(&d->arch.hvm_domain.irq_lock);
+
+    hvm_init_cacheattr_region_list(d);
+
+    if ( (rc = paging_enable(d, PG_refcounts|PG_translate|PG_external)) != 0 )
+        goto pvh_dominit_fail;
+
+    if ( (rc = hvm_funcs.domain_initialise(d)) != 0 )
+        goto pvh_dominit_fail;
+
+    return 0;
+
+pvh_dominit_fail:
+    hvm_destroy_cacheattr_region_list(d);
+    return rc;
+}
+
 int hvm_domain_initialise(struct domain *d)
 {
     int rc;
@@ -520,6 +544,8 @@ int hvm_domain_initialise(struct domain *d)
                  "on a non-VT/AMDV platform.\n");
         return -EINVAL;
     }
+    if ( is_pvh_domain(d) )
+        return pvh_dom_initialise(d);
 
     spin_lock_init(&d->arch.hvm_domain.pbuf_lock);
     spin_lock_init(&d->arch.hvm_domain.irq_lock);
@@ -584,6 +610,9 @@ int hvm_domain_initialise(struct domain *d)
 
 void hvm_domain_relinquish_resources(struct domain *d)
 {
+    if ( is_pvh_domain(d) )
+        return;
+
     if ( hvm_funcs.nhvm_domain_relinquish_resources )
         hvm_funcs.nhvm_domain_relinquish_resources(d);
 
@@ -609,10 +638,14 @@ void hvm_domain_relinquish_resources(struct domain *d)
 void hvm_domain_destroy(struct domain *d)
 {
     hvm_funcs.domain_destroy(d);
+    hvm_destroy_cacheattr_region_list(d);
+
+    if ( is_pvh_domain(d) )
+        return;
+
     rtc_deinit(d);
     stdvga_deinit(d);
     vioapic_deinit(d);
-    hvm_destroy_cacheattr_region_list(d);
 }
 
 static int hvm_save_tsc_adjust(struct domain *d, hvm_domain_context_t *h)
@@ -1066,6 +1099,30 @@ static int __init __hvm_register_CPU_XSAVE_save_and_restore(void)
 }
 __initcall(__hvm_register_CPU_XSAVE_save_and_restore);
 
+static int pvh_vcpu_initialise(struct vcpu *v)
+{
+    int rc;
+
+    if ( (rc = hvm_funcs.vcpu_initialise(v)) != 0 )
+        return rc;
+
+    softirq_tasklet_init(&v->arch.hvm_vcpu.assert_evtchn_irq_tasklet,
+                         (void(*)(unsigned long))hvm_assert_evtchn_irq,
+                         (unsigned long)v);
+
+    v->arch.hvm_vcpu.hcall_64bit = 1;    /* PVH 32bitfixme. */
+    v->arch.user_regs.eflags = 2;
+    v->arch.hvm_vcpu.inject_trap.vector = -1;
+
+    if ( (rc = hvm_vcpu_cacheattr_init(v)) != 0 )
+    {
+        hvm_funcs.vcpu_destroy(v);
+        return rc;
+    }
+
+    return 0;
+}
+
 int hvm_vcpu_initialise(struct vcpu *v)
 {
     int rc;
@@ -1077,6 +1134,9 @@ int hvm_vcpu_initialise(struct vcpu *v)
     spin_lock_init(&v->arch.hvm_vcpu.tm_lock);
     INIT_LIST_HEAD(&v->arch.hvm_vcpu.tm_list);
 
+    if ( is_pvh_vcpu(v) )
+        return pvh_vcpu_initialise(v);
+
     if ( (rc = vlapic_init(v)) != 0 )
         goto fail1;
 
@@ -1165,7 +1225,10 @@ void hvm_vcpu_destroy(struct vcpu *v)
 
     tasklet_kill(&v->arch.hvm_vcpu.assert_evtchn_irq_tasklet);
     hvm_vcpu_cacheattr_destroy(v);
-    vlapic_destroy(v);
+
+    if ( !is_pvh_vcpu(v) )
+        vlapic_destroy(v);
+
     hvm_funcs.vcpu_destroy(v);
 
     /* Event channel is already freed by evtchn_destroy(). */
-- 
1.7.2.3