[PATCH 3/15] Nested Virtualization: data structure

[PATCH 3/15] Nested Virtualization: data structure

[Christoph Egger]

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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: Andrew Bowd, Thomas M. McCoy, Giuliano Meroni
Sitz: Dornach, Gemeinde Aschheim, Landkreis Muenchen
Registergericht Muenchen, HRB Nr. 43632

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# HG changeset patch
# User cegger
# Date 1274774456 -7200
Data structures for Nested Virtualization

diff -r 8dd8474427c6 -r 9dd987bc025b 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 8dd8474427c6 -r 9dd987bc025b xen/include/asm-x86/hvm/hvm.h
--- a/xen/include/asm-x86/hvm/hvm.h
+++ b/xen/include/asm-x86/hvm/hvm.h
@@ -49,7 +49,8 @@ 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_gif,       /* GIF cleared */
 };
 
 /* These happen to be the same as the VMX interrupt shadow definitions. */
@@ -169,6 +170,8 @@ 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))
 
 #ifdef __x86_64__
 #define hvm_long_mode_enabled(v) \
diff -r 8dd8474427c6 -r 9dd987bc025b 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 8dd8474427c6 -r 9dd987bc025b 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 +35,60 @@ enum hvm_io_state {
     HVMIO_completed
 };
 
+struct nestedhvm {
+	bool_t nh_guestmode; /* vcpu in guestmode? */
+	bool_t nh_gif; /* vcpu's GIF */
+	struct vmcb_struct *nh_vmcb;
+	/* vmcb address of 1st level guest, needed for VMEXIT */
+	uint64_t nh_vmcbaddr;
+	void *nh_hostsave;
+	uint64_t nh_msr_hsavepa; /* MSR HSAVE_PA value */
+
+	/* Cached real intercepts of the nested guest */
+	uint32_t nh_cr_intercepts;
+	uint32_t nh_dr_intercepts;
+	uint32_t nh_exception_intercepts;
+	uint32_t nh_general1_intercepts;
+	uint32_t nh_general2_intercepts;
+
+	/* Cached real lbr of the nested guest */
+	lbrctrl_t nh_lbr_control;
+
+	/* Cached real MSR permission bitmaps of the nested guest */
+	unsigned long *nh_msrpm;
+
+	/* Cached cr3/hcr3 the guest sets up for the nested guest.
+	 * Used by Shadow-on-Shadow and Nested-on-Nested. */
+	uint64_t nh_vmcb_cr3, nh_vmcb_hcr3;
+	uint32_t nh_guest_asid, nh_old_guest_asid;
+	bool_t nh_tlb_control;
+	struct p2m_domain *nh_p2m; /* used p2m table for this vcpu */
+
+	/* Emulate cr0/4 for mov-from/to-cr0/4 instructions.
+	 * Emulate cr for hypervisor's which don't
+	 * intercept cr read/writes (Hyper-V).
+	 */
+	uint64_t nh_cr[5];
+
+	/* Only meaningful when forcevmexit flag is set */
+	uint64_t nh_forcevmexit_exitcode;
+	union {
+		uint32_t bytes;
+		struct {
+			uint32_t rflagsif : 1;
+			uint32_t vintrmask : 1;
+			uint32_t forcevmexit : 1;
+			uint32_t vmrun : 1;
+			uint32_t reserved : 28;	
+		} fields;
+	} nh_hostflags;
+
+	bool_t nh_hap_enabled;
+};
+
+#define VCPU_HVM(v)       ((v)->arch.hvm_vcpu)
+#define VCPU_NESTEDHVM(v) (VCPU_HVM((v)).nestedhvm)
+
 struct hvm_vcpu {
     /* Guest control-register and EFER values, just as the guest sees them. */
     unsigned long       guest_cr[5];
@@ -86,6 +140,8 @@ struct hvm_vcpu {
 
     struct tasklet      assert_evtchn_irq_tasklet;
 
+    struct nestedhvm    nestedhvm;
+
     struct mtrr_state   mtrr;
     u64                 pat_cr;
 

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