Signed-off-by: Sanjay Lal <sanjayl@xxxxxxxxxxx>
---
arch/mips/kvm/kvm_mips_stats.c | 93 ++++++++++++++++++++++++++++++++++++++++++
arch/mips/kvm/kvm_mips_stats.h | 47 +++++++++++++++++++++
2 files changed, 140 insertions(+)
create mode 100644 arch/mips/kvm/kvm_mips_stats.c
create mode 100644 arch/mips/kvm/kvm_mips_stats.h
diff --git a/arch/mips/kvm/kvm_mips_stats.c b/arch/mips/kvm/kvm_mips_stats.c
new file mode 100644
index 0000000..232e91b
--- /dev/null
+++ b/arch/mips/kvm/kvm_mips_stats.c
@@ -0,0 +1,93 @@
+/*
+* 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.
+*
+* KVM/MIPS: VM Exit stats, COP0 access histogram
+*
+* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
+* Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
+*/
+
+#include <linux/kvm_host.h>
+
+char *kvm_mips_exit_types_str[MAX_KVM_MIPS_EXIT_TYPES] = {
+ "WAIT",
+ "CACHE",
+ "Signal",
+ "Interrupt",
+ "COP0/1 Unusable",
+ "TLB Mod",
+ "TLB Miss (LD)",
+ "TLB Miss (ST)",
+ "Address Err (ST)",
+ "Address Error (LD)",
+ "System Call",
+ "Reserved Inst",
+ "Break Inst",
+ "D-Cache Flushes",
+};
+
+char *kvm_cop0_str[N_MIPS_COPROC_REGS] = {
+ "Index",
+ "Random",
+ "EntryLo0",
+ "EntryLo1",
+ "Context",
+ "PG Mask",
+ "Wired",
+ "HWREna",
+ "BadVAddr",
+ "Count",
+ "EntryHI",
+ "Compare",
+ "Status",
+ "Cause",
+ "EXC PC",
+ "PRID",
+ "Config",
+ "LLAddr",
+ "Watch Lo",
+ "Watch Hi",
+ "X Context",
+ "Reserved",
+ "Impl Dep",
+ "Debug",
+ "DEPC",
+ "PerfCnt",
+ "ErrCtl",
+ "CacheErr",
+ "TagLo",
+ "TagHi",
+ "ErrorEPC",
+ "DESAVE"
+};
+
+int
+kvm_mips_dump_stats(struct kvm_vcpu *vcpu)
+{
+ int i, j __unused;
+ ulong total_exits = 0;
+
+ /* 1st run, total exits */
+ for (i = 0; i < MAX_KVM_MIPS_EXIT_TYPES; i++) {
+ total_exits += vcpu->arch.exit_reason_stats[i];
+ }
+
+ printk("KVM Exit Stats (%lu total exits):\n", total_exits);
+ for (i = 0; i < MAX_KVM_MIPS_EXIT_TYPES; i++) {
+ printk("\t%s: %lu\n", kvm_mips_exit_types_str[i], vcpu->arch.exit_reason_stats[i]);
+ }
+
+#ifdef CONFIG_KVM_MIPS_DEBUG_COP0_COUNTERS
+ printk("\nKVM COP0 Access Profile:\n");
+ for (i = 0; i < N_MIPS_COPROC_REGS; i++) {
+ for (j = 0; j < N_MIPS_COPROC_SEL; j++) {
+ if (vcpu->arch.cop0->stat[i][j])
+ printk("%s[%d]: %lu\n", kvm_cop0_str[i], j, vcpu->arch.cop0->stat[i][j]);
+ }
+ }
+#endif
+
+ return 0;
+}
diff --git a/arch/mips/kvm/kvm_mips_stats.h b/arch/mips/kvm/kvm_mips_stats.h
new file mode 100644
index 0000000..df6872a
--- /dev/null
+++ b/arch/mips/kvm/kvm_mips_stats.h
@@ -0,0 +1,47 @@
+/*
+* 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.
+*
+* KVM/MIPS: Instrumentation, currently logs VM exit stats and COP0 accesses
+*
+* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
+* Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
+*/
+
+#ifndef __KVM_MIPS_STATS_H__
+#define __KVM_MIPS_STATS_H__
+
+#include <linux/kvm_host.h>
+#include <asm/kvm_host.h>
+
+#ifdef CONFIG_KVM_EXIT_STATS
+void kvm_mips_create_vcpu_debugfs(struct kvm_vcpu *vcpu, unsigned int id);
+void kvm_mips_remove_vcpu_debugfs(struct kvm_vcpu *vcpu);
+
+static inline void kvm_mips_set_exit_type(struct kvm_vcpu *vcpu, int type)
+{
+}
+
+/* account the exit in kvm_stats */
+static inline void kvm_mips_account_exit_stat(struct kvm_vcpu *vcpu, enum kvm_mips_exit_types type)
+{
+ vcpu->arch.exit_reason_stats[type]++;
+}
+
+/* wrapper to set exit time and account for it in kvm_stats */
+static inline void kvm_mips_account_exit(struct kvm_vcpu *vcpu, enum kvm_mips_exit_types type)
+{
+ kvm_mips_account_exit_stat(vcpu, type);
+}
+
+#else
+static inline void kvm_mips_create_vcpu_debugfs(struct kvm_vcpu *vcpu,
+ unsigned int id) {}
+static inline void kvm_mips_remove_vcpu_debugfs(struct kvm_vcpu *vcpu) {}
+static inline void kvm_mips_set_exit_type(struct kvm_vcpu *vcpu, int type) {}
+
+static inline void kvm_mips_account_exit(struct kvm_vcpu *vcpu, enum kvm_mips_exit_types type) {}
+#endif /* CONFIG_KVM_EXIT_STATS*/
+
+#endif /* __KVM_MIPS_STATS_H__ */
--
1.7.11.3
