[Xen-devel] [PATCH 21/23] PVH xen: VMX support of PVH guest creation/destruction

[Mukesh Rathor <mukesh.rathor@xxxxxxxxxx>]

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

Signed-off-by: Mukesh Rathor <mukesh.rathor@xxxxxxxxxx>
---
 xen/arch/x86/hvm/vmx/vmx.c |   40 ++++++++++++++++++++++++++++++++++++++++
 1 files changed, 40 insertions(+), 0 deletions(-)

diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
index 80109c1..7b141d6 100644
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -82,6 +82,9 @@ static int vmx_domain_initialise(struct domain *d)
 {
     int rc;
 
+    if ( is_pvh_domain(d) )
+        return 0;
+
     if ( (rc = vmx_alloc_vlapic_mapping(d)) != 0 )
         return rc;
 
@@ -90,6 +93,9 @@ static int vmx_domain_initialise(struct domain *d)
 
 static void vmx_domain_destroy(struct domain *d)
 {
+    if ( is_pvh_domain(d) )
+        return;
+
     vmx_free_vlapic_mapping(d);
 }
 
@@ -113,6 +119,12 @@ static int vmx_vcpu_initialise(struct vcpu *v)
 
     vpmu_initialise(v);
 
+    if ( is_pvh_vcpu(v) )
+    {
+        /* This for hvm_long_mode_enabled(v). */
+        v->arch.hvm_vcpu.guest_efer = EFER_SCE | EFER_LMA | EFER_LME;
+        return 0;
+    }
     vmx_install_vlapic_mapping(v);
 
     /* %eax == 1 signals full real-mode support to the guest loader. */
@@ -1076,6 +1088,28 @@ static void vmx_update_host_cr3(struct vcpu *v)
     vmx_vmcs_exit(v);
 }
 
+/*
+ * PVH guest never causes CR3 write vmexit. This is called during the guest
+ * setup.
+ */
+static void vmx_update_pvh_cr(struct vcpu *v, unsigned int cr)
+{
+    vmx_vmcs_enter(v);
+    switch ( cr )
+    {
+    case 3:
+        __vmwrite(GUEST_CR3, v->arch.hvm_vcpu.guest_cr[3]);
+        hvm_asid_flush_vcpu(v);
+        break;
+
+    default:
+        printk(XENLOG_ERR
+               "PVH: d%d v%d unexpected cr%d update at rip:%lx\n",
+               v->domain->domain_id, v->vcpu_id, cr, __vmread(GUEST_RIP));
+    }
+    vmx_vmcs_exit(v);
+}
+
 void vmx_update_debug_state(struct vcpu *v)
 {
     unsigned long mask;
@@ -1095,6 +1129,12 @@ void vmx_update_debug_state(struct vcpu *v)
 
 static void vmx_update_guest_cr(struct vcpu *v, unsigned int cr)
 {
+    if ( is_pvh_vcpu(v) )
+    {
+        vmx_update_pvh_cr(v, cr);
+        return;
+    }
+
     vmx_vmcs_enter(v);
 
     switch ( cr )
-- 
1.7.2.3


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