1 files changed, 20 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index f7f3c215d06f..b936a1dd0a50 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -355,6 +355,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .icache_bsize           = 128,
                 .dcache_bsize           = 128,
                 .machine_check          = machine_check_generic,
+                .oprofile_cpu_type      = "ppc64/compat-power5+",
                 .platform               = "power5+",
         },
         {       /* Power6 */
@@ -386,6 +387,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .icache_bsize           = 128,
                 .dcache_bsize           = 128,
                 .machine_check          = machine_check_generic,
+                .oprofile_cpu_type      = "ppc64/compat-power6",
                 .platform               = "power6",
         },
         {       /* 2.06-compliant processor, i.e. Power7 "architected" mode */
@@ -397,6 +399,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .icache_bsize           = 128,
                 .dcache_bsize           = 128,
                 .machine_check          = machine_check_generic,
+                .oprofile_cpu_type      = "ppc64/compat-power7",
                 .platform               = "power7",
         },
         {       /* Power7 */
@@ -1629,6 +1632,23 @@ struct cpu_spec * __init identify_cpu(unsigned long offset, unsigned int pvr)
                                 t->cpu_setup = s->cpu_setup;
                                 t->cpu_restore = s->cpu_restore;
                                 t->platform = s->platform;
+                                /*
+                                 * If we have passed through this logic once
+                                 * before and have pulled the default case
+                                 * because the real PVR was not found inside
+                                 * cpu_specs[], then we are possibly running in
+                                 * compatibility mode. In that case, let the
+                                 * oprofiler know which set of compatibility
+                                 * counters to pull from by making sure the
+                                 * oprofile_cpu_type string is set to that of
+                                 * compatibility mode. If the oprofile_cpu_type
+                                 * already has a value, then we are possibly
+                                 * overriding a real PVR with a logical one, and,
+                                 * in that case, keep the current value for
+                                 * oprofile_cpu_type.
+                                 */
+                                if (t->oprofile_cpu_type == NULL)
+                                        t->oprofile_cpu_type = s->oprofile_cpu_type;
                         } else
                                 *t = *s;
                         *PTRRELOC(&cur_cpu_spec) = &the_cpu_spec;