[PATCH] powerpc: Remove TM XER[SO] bug workaround on POWER9 v2.3

[Reza Arbab via B4 Relay]

From: Reza Arbab <arbab at linux.ibm.com>

When creating the CPU feature bits for DD2.3, I should not have carried
forward CPU_FTR_P9_TM_XER_SO_BUG. That bug is fixed in DD2.3, so remove
the flag.

Fixes: 26b78c81e84c ("powerpc: Enable the DAWR on POWER9 DD2.3 and above")
Signed-off-by: Reza Arbab <arbab at linux.ibm.com>
---
 arch/powerpc/include/asm/cputable.h | 1 -
 arch/powerpc/kernel/dt_cpu_ftrs.c   | 1 -
 2 files changed, 2 deletions(-)

diff --git a/arch/powerpc/include/asm/cputable.h b/arch/powerpc/include/asm/cputable.h
index 757dbded11dc..5dc6906498ef 100644
--- a/arch/powerpc/include/asm/cputable.h
+++ b/arch/powerpc/include/asm/cputable.h
@@ -439,7 +439,6 @@ static inline void cpu_feature_keys_init(void) { }
 			       CPU_FTR_P9_TM_XER_SO_BUG)
 #define CPU_FTRS_POWER9_DD2_3 (CPU_FTRS_POWER9 | CPU_FTR_POWER9_DD2_1 | \
 			       CPU_FTR_P9_TM_HV_ASSIST | \
-			       CPU_FTR_P9_TM_XER_SO_BUG | \
 			       CPU_FTR_DAWR)
 #define CPU_FTRS_POWER10 (CPU_FTR_LWSYNC | \
 	    CPU_FTR_PPCAS_ARCH_V2 | CPU_FTR_CTRL | CPU_FTR_ARCH_206 |\
diff --git a/arch/powerpc/kernel/dt_cpu_ftrs.c b/arch/powerpc/kernel/dt_cpu_ftrs.c
index c3fb9fdf5bd7..afcdbeed8b44 100644
--- a/arch/powerpc/kernel/dt_cpu_ftrs.c
+++ b/arch/powerpc/kernel/dt_cpu_ftrs.c
@@ -782,7 +782,6 @@ static __init void cpufeatures_cpu_quirks(void)
 		cur_cpu_spec->cpu_features &= ~(CPU_FTR_DAWR);
 	} else if ((version & 0xffffefff) == 0x004e0203) {
 		cur_cpu_spec->cpu_features |= CPU_FTR_P9_TM_HV_ASSIST;
-		cur_cpu_spec->cpu_features |= CPU_FTR_P9_TM_XER_SO_BUG;
 		cur_cpu_spec->cpu_features |= CPU_FTR_POWER9_DD2_1;
 	} else if ((version & 0xffff0000) == 0x004e0000) {
 		/* DD2.1 and up have DD2_1 */

---
base-commit: fe15c26ee26efa11741a7b632e9f23b01aca4cc6
change-id: 20230308-cpu_ftr_p9_tm_xer_so_bug-ec58b00a9716

Best regards,
-- 
Reza Arbab