KVM/MIPS32: COP0 accesses profiling.

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, 82 insertions, 0 deletions

diff --git a/arch/mips/kvm/kvm_mips_stats.c b/arch/mips/kvm/kvm_mips_stats.c
new file mode 100644
index 000000000000..075904bcac1b
--- /dev/null
+++ b/arch/mips/kvm/kvm_mips_stats.c
@@ -0,0 +1,82 @@
+/*
+* 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: COP0 access histogram
+*
+* Copyright (C) 2012  MIPS Technologies, Inc.  All rights reserved.
+* Authors: Sanjay Lal <sanjayl@kymasys.com>
+*/
+
+#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)
+{
+#ifdef CONFIG_KVM_MIPS_DEBUG_COP0_COUNTERS
+        int i, j;
+
+        printk("\nKVM VCPU[%d] COP0 Access Profile:\n", vcpu->vcpu_id);
+        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;
+}