Introduce 'PnvChipClass::logical_pvr' to know corresponding logical PVR
of a PowerPC CPU.
This helps to have a one-to-one mapping between PVR and logical PVR for
a CPU, and used in a later commit to handle cases where PCR of two
generations of Power chip is same, which causes regressions with compat-mode.

Cc: Cédric Le Goater <clg@kaod.org>
Cc: Daniel Henrique Barboza <danielhb413@gmail.com>
Cc: Mahesh J Salgaonkar <mahesh@linux.ibm.com>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Aditya Gupta <adityag@linux.ibm.com>
---
 target/ppc/cpu.h      | 1 +
 target/ppc/cpu_init.c | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h
index 2015e603d4e0..ff43e3645228 100644
--- a/target/ppc/cpu.h
+++ b/target/ppc/cpu.h
@@ -1504,6 +1504,7 @@ struct PowerPCCPUClass {
     void (*parent_parse_features)(const char *type, char *str, Error **errp);
 
     uint32_t pvr;
+    uint32_t logical_pvr;
     /*
      * If @best is false, match if pcc is in the family of pvr
      * Else match only if pcc is the best match for pvr in this family.
diff --git a/target/ppc/cpu_init.c b/target/ppc/cpu_init.c
index 82d700382cdd..6e3288e15b94 100644
--- a/target/ppc/cpu_init.c
+++ b/target/ppc/cpu_init.c
@@ -6151,6 +6151,7 @@ POWERPC_FAMILY(POWER7)(ObjectClass *oc, void *data)
 
     dc->fw_name = "PowerPC,POWER7";
     dc->desc = "POWER7";
+    pcc->logical_pvr = CPU_POWERPC_LOGICAL_2_06_PLUS;
     pcc->pvr_match = ppc_pvr_match_power7;
     pcc->pcr_mask = PCR_VEC_DIS | PCR_VSX_DIS | PCR_COMPAT_2_05;
     pcc->pcr_supported = PCR_COMPAT_2_06 | PCR_COMPAT_2_05;
@@ -6314,6 +6315,7 @@ POWERPC_FAMILY(POWER8)(ObjectClass *oc, void *data)
 
     dc->fw_name = "PowerPC,POWER8";
     dc->desc = "POWER8";
+    pcc->logical_pvr = CPU_POWERPC_LOGICAL_2_07;
     pcc->pvr_match = ppc_pvr_match_power8;
     pcc->pcr_mask = PCR_TM_DIS | PCR_COMPAT_2_06 | PCR_COMPAT_2_05;
     pcc->pcr_supported = PCR_COMPAT_2_07 | PCR_COMPAT_2_06 | PCR_COMPAT_2_05;
@@ -6507,6 +6509,7 @@ POWERPC_FAMILY(POWER9)(ObjectClass *oc, void *data)
 
     dc->fw_name = "PowerPC,POWER9";
     dc->desc = "POWER9";
+    pcc->logical_pvr = CPU_POWERPC_LOGICAL_3_00;
     pcc->pvr_match = ppc_pvr_match_power9;
     pcc->pcr_mask = PCR_COMPAT_2_05 | PCR_COMPAT_2_06 | PCR_COMPAT_2_07;
     pcc->pcr_supported = PCR_COMPAT_3_00 | PCR_COMPAT_2_07 | PCR_COMPAT_2_06 |
@@ -6687,6 +6690,7 @@ POWERPC_FAMILY(POWER10)(ObjectClass *oc, void *data)
 
     dc->fw_name = "PowerPC,POWER10";
     dc->desc = "POWER10";
+    pcc->logical_pvr = CPU_POWERPC_LOGICAL_3_10;
     pcc->pvr_match = ppc_pvr_match_power10;
     pcc->pcr_mask = PCR_COMPAT_2_05 | PCR_COMPAT_2_06 | PCR_COMPAT_2_07 |
                     PCR_COMPAT_3_00;
@@ -6790,6 +6794,7 @@ POWERPC_FAMILY(POWER11)(ObjectClass *oc, void *data)
 
     dc->fw_name = "PowerPC,POWER11";
     dc->desc = "POWER11";
+    pcc->logical_pvr = CPU_POWERPC_LOGICAL_3_10_PLUS;
     pcc->pvr_match = ppc_pvr_match_power11;
     pcc->pcr_mask = PCR_COMPAT_2_05 | PCR_COMPAT_2_06 | PCR_COMPAT_2_07 |
                     PCR_COMPAT_3_00;
-- 
2.45.1