This commit defines the API headers for guest debugging. There are two
architecture specific debug structures:
- kvm_guest_debug_arch, allows us to pass in HW debug registers
- kvm_debug_exit_arch, signals the exact debug exit and address
The type of debugging being used is control by the architecture specific
control bits of the kvm_guest_debug->control flags in the ioctl
structure.
Signed-off-by: Alex Bennée <alex.bennee@xxxxxxxxxx>
diff --git a/arch/arm64/include/uapi/asm/kvm.h b/arch/arm64/include/uapi/asm/kvm.h
index 8e38878..de2450c 100644
--- a/arch/arm64/include/uapi/asm/kvm.h
+++ b/arch/arm64/include/uapi/asm/kvm.h
@@ -93,10 +93,30 @@ struct kvm_sregs {
struct kvm_fpu {
};
+/* See ARM ARM D7.3: Debug Registers
+ *
+ * The control registers are stored as 64bit values as the setup code
+ * is shared with the normal cpu context restore code in hyp.S which
+ * is 64 bit only.
+ */
+#define KVM_ARM_NDBG_REGS 16
struct kvm_guest_debug_arch {
+ __u64 dbg_bcr[KVM_ARM_NDBG_REGS];
+ __u64 dbg_bvr[KVM_ARM_NDBG_REGS];
+ __u64 dbg_wcr[KVM_ARM_NDBG_REGS];
+ __u64 dbg_wvr[KVM_ARM_NDBG_REGS];
};
+/* Exit types which define why we did a debug exit */
+#define KVM_DEBUG_EXIT_ERROR 0x0
+#define KVM_DEBUG_EXIT_SINGLE_STEP 0x1
+#define KVM_DEBUG_EXIT_SW_BKPT 0x2
+#define KVM_DEBUG_EXIT_HW_BKPT 0x3
+#define KVM_DEBUG_EXIT_HW_WTPT 0x4
+
struct kvm_debug_exit_arch {
+ __u64 address;
+ __u32 exit_type;
};
struct kvm_sync_regs {
@@ -198,4 +218,12 @@ struct kvm_arch_memory_slot {
#endif
+/* Architecture related debug defines - upper 16 bits of
+ * kvm_guest_debug->control
+ */
+#define KVM_GUESTDBG_USE_SW_BP_SHIFT 16
+#define KVM_GUESTDBG_USE_SW_BP (1 << KVM_GUESTDBG_USE_SW_BP_SHIFT)
+#define KVM_GUESTDBG_USE_HW_BP_SHIFT 17
+#define KVM_GUESTDBG_USE_HW_BP (1 << KVM_GUESTDBG_USE_HW_BP_SHIFT)
+
#endif /* __ARM_KVM_H__ */
--
2.1.3
--
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