powerpc/xmon: Add ISA v3.0 SPRs to SPR dump

Add support for printing the PIDR/TIDR for ISA 300 and PSSCR and PTCR
in ISA 3.0 hypervisor mode.

SPRN_PSSCR_PR is the privileged mode access and is used when we are
not in hypervisor mode.
Signed-off-by: Balbir Singh <bsingharora@gmail.com>
[mpe: Split out of larger patch]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/include/asm/reg.h

@@ -356,6 +356,7 @@
 #define SPRN_PMSR	0x355   /* Power Management Status Reg */
 #define SPRN_PMMAR	0x356	/* Power Management Memory Activity Register */
 #define SPRN_PSSCR	0x357	/* Processor Stop Status and Control Register (ISA 3.0) */
+#define SPRN_PSSCR_PR	0x337	/* PSSCR ISA 3.0, privileged mode access */
 #define SPRN_PMCR	0x374	/* Power Management Control Register */
 
 /* HFSCR and FSCR bit numbers are the same */

arch/powerpc/xmon/xmon.c

@@ -1807,6 +1807,28 @@ static void dump_207_sprs(void)
 #endif
 }
 
+static void dump_300_sprs(void)
+{
+#ifdef CONFIG_PPC64
+	bool hv = mfmsr() & MSR_HV;
+
+	if (!cpu_has_feature(CPU_FTR_ARCH_300))
+		return;
+
+	printf("pidr   = %.16lx  tidr  = %.16lx\n",
+		mfspr(SPRN_PID), mfspr(SPRN_TIDR));
+	printf("asdr   = %.16lx  psscr = %.16lx\n",
+		mfspr(SPRN_ASDR), hv ? mfspr(SPRN_PSSCR)
+					: mfspr(SPRN_PSSCR_PR));
+
+	if (!hv)
+		return;
+
+	printf("ptcr   = %.16lx\n",
+		mfspr(SPRN_PTCR));
+#endif
+}
+
 static void dump_one_spr(int spr, bool show_unimplemented)
 {
 	unsigned long val;
@@ -1860,6 +1882,7 @@ static void super_regs(void)
 
 		dump_206_sprs();
 		dump_207_sprs();
+		dump_300_sprs();
 
 		return;
 	}