From: Sanjay Lal <sanjayl@kymasys.com>
Date: Thu, 22 Nov 2012 02:34:07 +0000 (-0800)
Subject: KVM/MIPS32: COP0 accesses profiling.
X-Git-Tag: firefly_0821_release~3680^2~497^2~1^2~8
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=3c20ef526253da02348ec45768d5a90813577d88;p=firefly-linux-kernel-4.4.55.git

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
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;
+}