[PATCH 05/18] PVH xen: hvm/vmcs related preparatory changes for PVH

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

In this patch, some common code is factored out to create
vmx_set_common_host_vmcs_fields() to be used by PVH. Also, some changes
in hvm.c as hvm_domain.params is not set for PVH.

Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Mukesh Rathor <mukesh.rathor@oracle.com>
---
 xen/arch/x86/hvm/hvm.c      |   10 ++++---
 xen/arch/x86/hvm/vmx/vmcs.c |   58 +++++++++++++++++++++++-------------------
 2 files changed, 38 insertions(+), 30 deletions(-)

diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index 43b6d05..118e21a 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -1070,10 +1070,13 @@ int hvm_vcpu_initialise(struct vcpu *v)
 {
     int rc;
     struct domain *d = v->domain;
-    domid_t dm_domid = d->arch.hvm_domain.params[HVM_PARAM_DM_DOMAIN];
+    domid_t dm_domid;
 
     hvm_asid_flush_vcpu(v);
 
+    spin_lock_init(&v->arch.hvm_vcpu.tm_lock);
+    INIT_LIST_HEAD(&v->arch.hvm_vcpu.tm_list);
+
     if ( (rc = vlapic_init(v)) != 0 )
         goto fail1;
 
@@ -1084,6 +1087,8 @@ int hvm_vcpu_initialise(struct vcpu *v)
          && (rc = nestedhvm_vcpu_initialise(v)) < 0 ) 
         goto fail3;
 
+    dm_domid = d->arch.hvm_domain.params[HVM_PARAM_DM_DOMAIN];
+
     /* Create ioreq event channel. */
     rc = alloc_unbound_xen_event_channel(v, dm_domid, NULL);
     if ( rc < 0 )
@@ -1106,9 +1111,6 @@ int hvm_vcpu_initialise(struct vcpu *v)
         get_ioreq(v)->vp_eport = v->arch.hvm_vcpu.xen_port;
     spin_unlock(&d->arch.hvm_domain.ioreq.lock);
 
-    spin_lock_init(&v->arch.hvm_vcpu.tm_lock);
-    INIT_LIST_HEAD(&v->arch.hvm_vcpu.tm_list);
-
     v->arch.hvm_vcpu.inject_trap.vector = -1;
 
     rc = setup_compat_arg_xlat(v);
diff --git a/xen/arch/x86/hvm/vmx/vmcs.c b/xen/arch/x86/hvm/vmx/vmcs.c
index ef0ee7f..43539a6 100644
--- a/xen/arch/x86/hvm/vmx/vmcs.c
+++ b/xen/arch/x86/hvm/vmx/vmcs.c
@@ -825,11 +825,40 @@ void virtual_vmcs_vmwrite(void *vvmcs, u32 vmcs_encoding, u64 val)
     virtual_vmcs_exit(vvmcs);
 }
 
-static int construct_vmcs(struct vcpu *v)
+static void vmx_set_common_host_vmcs_fields(struct vcpu *v)
 {
-    struct domain *d = v->domain;
     uint16_t sysenter_cs;
     unsigned long sysenter_eip;
+
+    /* Host data selectors. */
+    __vmwrite(HOST_SS_SELECTOR, __HYPERVISOR_DS);
+    __vmwrite(HOST_DS_SELECTOR, __HYPERVISOR_DS);
+    __vmwrite(HOST_ES_SELECTOR, __HYPERVISOR_DS);
+    __vmwrite(HOST_FS_SELECTOR, 0);
+    __vmwrite(HOST_GS_SELECTOR, 0);
+    __vmwrite(HOST_FS_BASE, 0);
+    __vmwrite(HOST_GS_BASE, 0);
+
+    /* Host control registers. */
+    v->arch.hvm_vmx.host_cr0 = read_cr0() | X86_CR0_TS;
+    __vmwrite(HOST_CR0, v->arch.hvm_vmx.host_cr0);
+    __vmwrite(HOST_CR4,
+              mmu_cr4_features | (xsave_enabled(v) ? X86_CR4_OSXSAVE : 0));
+
+    /* Host CS:RIP. */
+    __vmwrite(HOST_CS_SELECTOR, __HYPERVISOR_CS);
+    __vmwrite(HOST_RIP, (unsigned long)vmx_asm_vmexit_handler);
+
+    /* Host SYSENTER CS:RIP. */
+    rdmsrl(MSR_IA32_SYSENTER_CS, sysenter_cs);
+    __vmwrite(HOST_SYSENTER_CS, sysenter_cs);
+    rdmsrl(MSR_IA32_SYSENTER_EIP, sysenter_eip);
+    __vmwrite(HOST_SYSENTER_EIP, sysenter_eip);
+}
+
+static int construct_vmcs(struct vcpu *v)
+{
+    struct domain *d = v->domain;
     u32 vmexit_ctl = vmx_vmexit_control;
     u32 vmentry_ctl = vmx_vmentry_control;
 
@@ -932,30 +961,7 @@ static int construct_vmcs(struct vcpu *v)
         __vmwrite(POSTED_INTR_NOTIFICATION_VECTOR, posted_intr_vector);
     }
 
-    /* Host data selectors. */
-    __vmwrite(HOST_SS_SELECTOR, __HYPERVISOR_DS);
-    __vmwrite(HOST_DS_SELECTOR, __HYPERVISOR_DS);
-    __vmwrite(HOST_ES_SELECTOR, __HYPERVISOR_DS);
-    __vmwrite(HOST_FS_SELECTOR, 0);
-    __vmwrite(HOST_GS_SELECTOR, 0);
-    __vmwrite(HOST_FS_BASE, 0);
-    __vmwrite(HOST_GS_BASE, 0);
-
-    /* Host control registers. */
-    v->arch.hvm_vmx.host_cr0 = read_cr0() | X86_CR0_TS;
-    __vmwrite(HOST_CR0, v->arch.hvm_vmx.host_cr0);
-    __vmwrite(HOST_CR4,
-              mmu_cr4_features | (xsave_enabled(v) ? X86_CR4_OSXSAVE : 0));
-
-    /* Host CS:RIP. */
-    __vmwrite(HOST_CS_SELECTOR, __HYPERVISOR_CS);
-    __vmwrite(HOST_RIP, (unsigned long)vmx_asm_vmexit_handler);
-
-    /* Host SYSENTER CS:RIP. */
-    rdmsrl(MSR_IA32_SYSENTER_CS, sysenter_cs);
-    __vmwrite(HOST_SYSENTER_CS, sysenter_cs);
-    rdmsrl(MSR_IA32_SYSENTER_EIP, sysenter_eip);
-    __vmwrite(HOST_SYSENTER_EIP, sysenter_eip);
+    vmx_set_common_host_vmcs_fields(v);
 
     /* MSR intercepts. */
     __vmwrite(VM_EXIT_MSR_LOAD_COUNT, 0);
-- 
1.7.2.3