[PATCH 02/13] Nested Virtualization: data structure

[Christoph Egger <Christoph.Egger@amd.com>]

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Signed-off-by: Christoph Egger <Christoph.Egger@amd.com>

-- 
---to satisfy European Law for business letters:
Advanced Micro Devices GmbH
Einsteinring 24, 85609 Dornach b. Muenchen
Geschaeftsfuehrer: Alberto Bozzo, Andrew Bowd
Sitz: Dornach, Gemeinde Aschheim, Landkreis Muenchen
Registergericht Muenchen, HRB Nr. 43632

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# HG changeset patch
# User cegger
# Date 1283345873 -7200
Data structures for Nested Virtualization

diff -r ecec3d163efa -r 32aec447e8a1 xen/arch/x86/hvm/svm/vmcb.c
--- a/xen/arch/x86/hvm/svm/vmcb.c
+++ b/xen/arch/x86/hvm/svm/vmcb.c
@@ -40,9 +40,6 @@
 
 extern int svm_dbg_on;
 
-#define IOPM_SIZE   (12 * 1024)
-#define MSRPM_SIZE  (8  * 1024)
-
 struct vmcb_struct *alloc_vmcb(void) 
 {
     struct vmcb_struct *vmcb;
diff -r ecec3d163efa -r 32aec447e8a1 xen/include/asm-x86/hvm/hvm.h
--- a/xen/include/asm-x86/hvm/hvm.h
+++ b/xen/include/asm-x86/hvm/hvm.h
@@ -52,7 +52,8 @@ enum hvm_intblk {
     hvm_intblk_shadow,    /* MOV-SS or STI shadow */
     hvm_intblk_rflags_ie, /* RFLAGS.IE == 0 */
     hvm_intblk_tpr,       /* LAPIC TPR too high */
-    hvm_intblk_nmi_iret   /* NMI blocked until IRET */
+    hvm_intblk_nmi_iret,  /* NMI blocked until IRET */
+    hvm_intblk_svm_gif,   /* GIF cleared */
 };
 
 /* These happen to be the same as the VMX interrupt shadow definitions. */
@@ -180,6 +181,8 @@ int hvm_girq_dest_2_vcpu_id(struct domai
     (hvm_paging_enabled(v) && ((v)->arch.hvm_vcpu.guest_cr[4] & X86_CR4_PAE))
 #define hvm_nx_enabled(v) \
     (!!((v)->arch.hvm_vcpu.guest_efer & EFER_NX))
+#define hvm_svm_enabled(v) \
+    (!!((v)->arch.hvm_vcpu.guest_efer & EFER_SVME))
 
 #define hvm_hap_has_1gb(d) \
     (hvm_funcs.hap_capabilities & HVM_HAP_SUPERPAGE_1GB)
diff -r ecec3d163efa -r 32aec447e8a1 xen/include/asm-x86/hvm/svm/vmcb.h
--- a/xen/include/asm-x86/hvm/svm/vmcb.h
+++ b/xen/include/asm-x86/hvm/svm/vmcb.h
@@ -364,6 +364,9 @@ typedef union
     } fields;
 } __attribute__ ((packed)) lbrctrl_t;
 
+#define IOPM_SIZE   (12 * 1024)
+#define MSRPM_SIZE  (8  * 1024)
+
 struct vmcb_struct {
     u32 cr_intercepts;          /* offset 0x00 */
     u32 dr_intercepts;          /* offset 0x04 */
diff -r ecec3d163efa -r 32aec447e8a1 xen/include/asm-x86/hvm/vcpu.h
--- a/xen/include/asm-x86/hvm/vcpu.h
+++ b/xen/include/asm-x86/hvm/vcpu.h
@@ -35,6 +35,61 @@ enum hvm_io_state {
     HVMIO_completed
 };
 
+struct nestedhvm {
+    bool_t nh_gif; /* vcpu's GIF, always true on VMX */
+    bool_t nh_guestmode; /* vcpu in guestmode? */
+    void *nh_vm; /* VMCB/VMCS */
+    size_t nh_vmsize; /* size of VMCB/VMCS */
+
+    /* guest vm address of 1st level guest, needed for VMEXIT */
+    uint64_t nh_vmaddr;
+    uint64_t nh_vmmaxaddr; /* Maximum supported address */
+    void *nh_hostsave;
+
+    void *nh_arch; /* SVM/VMX specific data */
+    size_t nh_arch_size;
+
+    /* Cached real MSR permission bitmaps of the nested guest */
+    unsigned long *nh_cached_msrpm;
+    size_t nh_cached_msrpm_size;
+    /* Merged MSR permission bitmap */
+    unsigned long *nh_merged_msrpm;
+    size_t nh_merged_msrpm_size;
+
+    /* Cache guest cr3/host cr3 the guest sets up for the nested guest.
+     * Used by Shadow-on-Shadow and Nested-on-Nested.
+     * nh_vm_guestcr3: in l2 guest physical address space and points to
+     *     the l2 guest page table
+     * nh_vm_hostcr3: in l1 guest physical address space and points to
+     *     the l1 guest nested page table
+     */
+    uint64_t nh_vm_guestcr3, nh_vm_hostcr3;
+    uint32_t nh_guest_asid;
+    bool_t nh_flushp2m;
+    struct p2m_domain *nh_p2m; /* used p2m table for this vcpu */
+
+    /* Only meaningful when forcevmexit flag is set */
+    struct {
+        uint64_t exitcode;  /* generic exitcode */
+        uint64_t exitinfo1; /* additional information to the exitcode */
+        uint64_t exitinfo2; /* additional information to the exitcode */
+    } nh_forcevmexit;
+    union {
+        uint32_t bytes;
+        struct {
+            uint32_t rflagsif : 1;
+            uint32_t vintrmask : 1; /* always cleared on VMX */
+            uint32_t forcevmexit : 1;
+            uint32_t vmentry : 1;   /* true during vmentry/vmexit emulation */
+            uint32_t reserved : 28;	
+        } fields;
+    } nh_hostflags;
+
+    bool_t nh_hap_enabled;
+};
+
+#define vcpu_nestedhvm(v) ((v)->arch.hvm_vcpu.nestedhvm)
+
 struct hvm_vcpu {
     /* Guest control-register and EFER values, just as the guest sees them. */
     unsigned long       guest_cr[5];
@@ -86,6 +141,8 @@ struct hvm_vcpu {
 
     struct tasklet      assert_evtchn_irq_tasklet;
 
+    struct nestedhvm    nestedhvm;
+
     struct mtrr_state   mtrr;
     u64                 pat_cr;
 

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