KVM/MIPS32: MIPS arch specific APIs for KVM

- Implements the arch specific APIs for KVM, some are stubs for MIPS
- kvm_mips_handle_exit(): Main 'C' distpatch routine for handling exceptions while in "Guest" mode.
- Also implements in-kernel timer interrupt support for the guest.

Signed-off-by: Sanjay Lal <sanjayl@kymasys.com>
Cc: kvm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 46 insertions, 0 deletions

diff --git a/arch/mips/kvm/trace.h b/arch/mips/kvm/trace.h
new file mode 100644
index 000000000000..bc9e0f406c08
--- /dev/null
+++ b/arch/mips/kvm/trace.h
@@ -0,0 +1,46 @@
+/*
+* This file is subject to the terms and conditions of the GNU General Public
+* License.  See the file "COPYING" in the main directory of this archive
+* for more details.
+*
+* Copyright (C) 2012  MIPS Technologies, Inc.  All rights reserved.
+* Authors: Sanjay Lal <sanjayl@kymasys.com>
+*/
+
+#if !defined(_TRACE_KVM_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_KVM_H
+
+#include <linux/tracepoint.h>
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM kvm
+#define TRACE_INCLUDE_PATH .
+#define TRACE_INCLUDE_FILE trace
+
+/*
+ * Tracepoints for VM eists
+ */
+extern char *kvm_mips_exit_types_str[MAX_KVM_MIPS_EXIT_TYPES];
+
+TRACE_EVENT(kvm_exit,
+            TP_PROTO(struct kvm_vcpu *vcpu, unsigned int reason),
+            TP_ARGS(vcpu, reason),
+            TP_STRUCT__entry(
+                        __field(struct kvm_vcpu *, vcpu)
+                        __field(unsigned int, reason)
+            ),
+
+            TP_fast_assign(
+                        __entry->vcpu = vcpu;
+                        __entry->reason = reason;
+            ),
+
+            TP_printk("[%s]PC: 0x%08lx",
+                      kvm_mips_exit_types_str[__entry->reason],
+                      __entry->vcpu->arch.pc)
+);
+
+#endif /* _TRACE_KVM_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>