[Xen-devel] [v3 04/10] vmx: add new data structure member to support PML

[Kai Huang <kai.huang@xxxxxxxxxxxxxxx>]

A new 4K page pointer is added to arch_vmx_struct as PML buffer for vcpu. And a
new 'status' field is added to vmx_domain to indicate whether PML is enabled for
the domain or not.

Signed-off-by: Kai Huang <kai.huang@xxxxxxxxxxxxxxx>
---
 xen/include/asm-x86/hvm/vmx/vmcs.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/xen/include/asm-x86/hvm/vmx/vmcs.h 
b/xen/include/asm-x86/hvm/vmx/vmcs.h
index f831a78..441e974 100644
--- a/xen/include/asm-x86/hvm/vmx/vmcs.h
+++ b/xen/include/asm-x86/hvm/vmx/vmcs.h
@@ -70,8 +70,12 @@ struct ept_data {
     cpumask_var_t synced_mask;
 };
 
+#define _VMX_DOMAIN_PML_ENABLED    0
+#define VMX_DOMAIN_PML_ENABLED     (1ul << _VMX_DOMAIN_PML_ENABLED)
 struct vmx_domain {
     unsigned long apic_access_mfn;
+    /* VMX_DOMAIN_* */
+    unsigned int status;
 };
 
 struct pi_desc {
@@ -85,6 +89,8 @@ struct pi_desc {
 #define ept_get_eptp(ept) ((ept)->eptp)
 #define ept_get_synced_mask(ept) ((ept)->synced_mask)
 
+#define NR_PML_ENTRIES   512
+
 struct arch_vmx_struct {
     /* Virtual address of VMCS. */
     struct vmcs_struct  *vmcs;
@@ -142,6 +148,8 @@ struct arch_vmx_struct {
     /* Bitmap to control vmexit policy for Non-root VMREAD/VMWRITE */
     struct page_info     *vmread_bitmap;
     struct page_info     *vmwrite_bitmap;
+
+    struct page_info     *pml_pg;
 };
 
 int vmx_create_vmcs(struct vcpu *v);
-- 
2.1.0


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