powerpc/perf: Properly detect mpc7450 family

Unlike PVR_POWER8, etc ...., PVR_7450 represents a full PVR
value and not a family value.

To avoid confusion, do like E500 family and define the relevant
PVR_VER_xxxx values for the 7450 family:
0x8000 ==> 7450
0x8001 ==> 7455
0x8002 ==> 7447
0x8003 ==> 7447A
0x8004 ==> 7448

And use them to detect 7450 family for perf events.

Reported-by: kernel test robot <[e-mail]>
Reported-by: Dan Carpenter <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]/
Fixes: ec3eb9d941a9 ("powerpc/perf: Use PVR rather than oprofile field to determine CPU version")
Signed-off-by: Christophe Leroy <[e-mail]>
Signed-off-by: Michael Ellerman <[e-mail]>
Link: https://msgid.link/99ca1da2[e-mail]

arch/powerpc/include/asm/reg.h

···
 #define PVR_VER_E500MC	0x8023
 #define PVR_VER_E5500	0x8024
 #define PVR_VER_E6500	0x8040
+#define PVR_VER_7450	0x8000
+#define PVR_VER_7455	0x8001
+#define PVR_VER_7447	0x8002
+#define PVR_VER_7447A	0x8003
+#define PVR_VER_7448	0x8004
 
 /*
  * For the 8xx processors, all of them report the same PVR family for

arch/powerpc/perf/mpc7450-pmu.c

···
 
 static int __init init_mpc7450_pmu(void)
 {
-	unsigned int pvr = mfspr(SPRN_PVR);
-
-	if (PVR_VER(pvr) != PVR_7450)
+	if (!pvr_version_is(PVR_VER_7450) && !pvr_version_is(PVR_VER_7455) &&
+	    !pvr_version_is(PVR_VER_7447) && !pvr_version_is(PVR_VER_7447A) &&
+	    !pvr_version_is(PVR_VER_7448))
 		return -ENODEV;
 
 	return register_power_pmu(&mpc7450_pmu);