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>

diff --git a/arch/mips/kvm/kvm_mips_stats.c b/arch/mips/kvm/kvm_mips_stats.c
new file mode 100644 (file)
index 0000000..075904b
--- /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;
+}