fix(cpus): workaround platforms non-arm interconnect

The workarounds for these below mentioned errata are not implemented
in EL3, but the flags can be enabled/disabled at a platform level
based on arm/non-arm interconnect IP. The ABI helps assist the Kernel
in the process of mitigation for the following errata:

Cortex-A715:   erratum 2701951
Neoverse V2:   erratum 2719103
Cortex-A710:   erratum 2701952
Cortex-X2:     erratum 2701952
Neoverse N2:   erratum 2728475
Neoverse V1:   erratum 2701953
Cortex-A78:    erratum 2712571
Cortex-A78AE:  erratum 2712574
Cortex-A78C:   erratum 2712575

EL3 provides an appropriate return value via errata ABI when the
kernel makes an SMC call using the EM_CPU_ERRATUM_FEATURES FID with the
appropriate erratum ID.

Change-Id: I35bd69d812dba37410dd8bc2bbde20d4955b0850
Signed-off-by: Sona Mathew <SonaRebecca.Mathew@arm.com>

4 files changed, 147 insertions, 19 deletions

diff --git a/docs/design/cpu-specific-build-macros.rst b/docs/design/cpu-specific-build-macros.rst
index 0f1f92aea..758d62be9 100644
--- a/docs/design/cpu-specific-build-macros.rst
+++ b/docs/design/cpu-specific-build-macros.rst
@@ -317,6 +317,11 @@ For Cortex-A78, the following errata build flags are defined :
    CPU. This needs to be enabled for revisions r0p0, r1p0, r1p1, and r1p2, and
    it is still open.
 
+- ``ERRATA_A78_2712571``: This applies erratum 2712571 workaround to Cortex-A78
+   CPU, this erratum affects system configurations that do not use an ARM
+   interconnect IP. This needs to be enabled for revisions r0p0, r1p0, r1p1
+   and r1p2 and it is still open.
+
 -  ``ERRATA_A78_2742426``: This applies erratum 2742426 workaround to Cortex-A78
    CPU. This needs to be enabled for revisions r0p0, r1p0, r1p1 and r1p2 and
    it is still open.
@@ -347,6 +352,11 @@ For Cortex-A78 AE, the following errata build flags are defined :
   Cortex-A78 AE CPU. This needs to be enabled for revisions r0p0 and r0p1. This
   erratum is still open.
 
+- ``ERRATA_A78_AE_2712574`` : This applies erratum 2712574 workaround to
+  Cortex-A78 AE CPU. This erratum affects system configurations that do not use
+  an ARM interconnect IP. This needs to be enabled for revisions r0p0, r0p1 and
+  r0p2. This erratum is still open.
+
 For Cortex-A78C, the following errata build flags are defined :
 
 - ``ERRATA_A78C_1827430`` : This applies errata 1827430 workaround to
@@ -373,6 +383,11 @@ For Cortex-A78C, the following errata build flags are defined :
   Cortex-A78C CPU. This needs to be enabled for revisions r0p1 and r0p2. This
   erratum is still open.
 
+- ``ERRATA_A78C_2712575`` : This applies erratum 2712575 workaround to
+  Cortex-A78C CPU, this erratum affects system configurations that do not use
+  an ARM interconnect IP. This needs to be enabled for revisions r0p1 and r0p2
+  and is still open.
+
 - ``ERRATA_A78C_2772121`` : This applies errata 2772121 workaround to
   Cortex-A78C CPU. This needs to be enabled for revisions r0p0, r0p1 and r0p2.
   This erratum is still open.
@@ -488,6 +503,11 @@ For Neoverse V1, the following errata build flags are defined :
    CPU. This needs to be enabled for revisions r0p0, r1p0 and r1p1 of the CPU.
    It is still open.
 
+- ``ERRATA_V1_2701953``: This applies erratum 2701953 workaround to Neoverse-V1
+   CPU, this erratum affects system configurations that do not use an ARM
+   interconnect IP. This needs to be enabled for revisions r0p0, r1p0 and r1p1.
+   It has been fixed in r1p2.
+
 -  ``ERRATA_V1_2743093``: This applies errata 2743093 workaround to Neoverse-V1
    CPU. This needs to be enabled for revisions r0p0, r1p0, r1p1 and r1p2 of the
    CPU. It is still open.
@@ -500,6 +520,13 @@ For Neoverse V1, the following errata build flags are defined :
    CPU. This needs to be enabled for revisions r0p0, r1p0, r1p1, r1p2 of the
    CPU. It is still open.
 
+For Neoverse V2, the following errata build flags are defined :
+
+-  ``ERRATA_V2_2719103``: This applies errata 2719103 workaround to Neoverse-V2
+   CPU, this affects system configurations that do not use and ARM interconnect
+   IP. This needs to be enabled for revisions r0p0 and r0p1. It has been fixed
+   in r0p2.
+
 For Cortex-A710, the following errata build flags are defined :
 
 -  ``ERRATA_A710_1987031``: This applies errata 1987031 workaround to
@@ -558,6 +585,11 @@ For Cortex-A710, the following errata build flags are defined :
    Cortex-A710 CPU. This needs to be enabled for revisions r0p0, r1p0 and r2p0
    of the CPU and is fixed in r2p1.
 
+-  ``ERRATA_A710_2701952``: This applies erratum 2701952 workaround to Cortex-A710
+   CPU, and applies to system configurations that do not use and ARM
+   interconnect IP. This needs to be enabled for r0p0, r1p0, r2p0 and r2p1 and
+   is still open.
+
 -  ``ERRATA_A710_2768515``: This applies errata 2768515 workaround to
    Cortex-A710 CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and
    r2p1 of the CPU and is still open.
@@ -610,6 +642,11 @@ For Neoverse N2, the following errata build flags are defined :
    CPU. This needs to be enabled for revisions r0p0, r0p1 and r0p2. It is fixed
    in r0p3.
 
+- ``ERRATA_N2_2728475``: This applies erratum 2728475 workaround to Neoverse-N2
+   CPU, this erratum affects system configurations that do not use and ARM
+   interconnect IP. This needs to be enabled for revisions r0p0, r0p1 and r0p2.
+   It is fixed in r0p3.
+
 For Cortex-X2, the following errata build flags are defined :
 
 -  ``ERRATA_X2_2002765``: This applies errata 2002765 workaround to Cortex-X2
@@ -647,6 +684,11 @@ For Cortex-X2, the following errata build flags are defined :
    CPU. This needs to be enabled for revisions r0p0, r1p0 and r2p0 of the CPU
    and is fixed in r2p1.
 
+- ``ERRATA_X2_2701952``: This applies erratum 2701952 workaround to Cortex-X2
+   CPU and affects system configurations that do not use an ARM interconnect IP.
+   This needs to be enabled for revisions r0p0, r1p0, r2p0 and r2p1 and is
+   still open.
+
 -  ``ERRATA_X2_2768515``: This applies errata 2768515 workaround to Cortex-X2
    CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and r2p1 of the
    CPU and is still open.
@@ -709,6 +751,13 @@ For Cortex-A510, the following errata build flags are defined :
    Cortex-A510 CPU. This needs to be applied to revision r0p0, r0p1, r0p2,
    r0p3, r1p0, r1p1 and r1p2. It is fixed in r1p3.
 
+For Cortex-A715, the following errata build flags are defined :
+
+-  ``ERRATA_A715_2701951``: This applies erratum 2701951 workaround to Cortex-A715
+   CPU and affects system configurations that do not use an ARM interconnect
+   IP. This needs to be applied to revisions r0p0, r1p0 and r1p1. It is fixed
+   in r1p2.
+
 DSU Errata Workarounds
 ----------------------
 
diff --git a/lib/cpus/cpu-ops.mk b/lib/cpus/cpu-ops.mk
index 82a4890cf..e16c8e495 100644
--- a/lib/cpus/cpu-ops.mk
+++ b/lib/cpus/cpu-ops.mk
@@ -324,6 +324,11 @@ CPU_FLAG_LIST += ERRATA_A78_2376745
 # to revisions r0p0, r1p0, r1p1, and r1p2 of the A78 cpu. It is still open.
 CPU_FLAG_LIST += ERRATA_A78_2395406
 
+# Flag to apply erratum 2712571 workaround for non-arm interconnect ip. This
+# erratum applies to revisions r0p0, r1p0, r1p1, and r1p2 of the A78 cpu.
+# It is fixed in r1p2.
+CPU_FLAG_LIST += ERRATA_A78_2712571
+
 # Flag to apply erratum 2742426 workaround during reset. This erratum
 # applies to revisions r0p0, r1p0, r1p1 and r1p2 of the A78 cpu. It is still
 # open.
@@ -362,6 +367,11 @@ CPU_FLAG_LIST += ERRATA_A78C_1827430
 # to revision r0p0 of the A78C cpu. It is fixed in r0p1.
 CPU_FLAG_LIST += ERRATA_A78C_1827440
 
+# Flag to apply erratum 2712574 workaround for non-arm interconnect ip. This
+# erratum applies to revisions r0p0, r0p1 and r0p2 of the A78 AE cpu.
+# It is still open.
+CPU_FLAG_LIST += ERRATA_A78_AE_2712574
+
 # Flag to apply erratum 2132064 workaround during reset. This erratum applies
 # to revisions r0p1 and r0p2 of the A78C cpu. It is still open.
 CPU_FLAG_LIST += ERRATA_A78C_2132064
@@ -378,6 +388,11 @@ CPU_FLAG_LIST += ERRATA_A78C_2376749
 # to revisions r0p1 and r0p2 of the A78C cpu. It is still open.
 CPU_FLAG_LIST += ERRATA_A78C_2395411
 
+# Flag to apply erratum 2712575 workaround for non-arm interconnect ip. This
+# erratum applies to revisions r0p1 and r0p2 of the A78C cpu.
+# It is still open.
+CPU_FLAG_LIST += ERRATA_A78C_2712575
+
 # Flag to apply erratum 2772121 workaround during powerdown. This erratum
 # applies to revisions r0p0, r0p1 and r0p2 of the A78C cpu. It is still open.
 CPU_FLAG_LIST += ERRATA_A78C_2772121
@@ -509,6 +524,11 @@ CPU_FLAG_LIST += ERRATA_V1_2294912
 # to revisions r0p0, r1p0 and r1p1 of the Neoverse V1 cpu and is still open.
 CPU_FLAG_LIST += ERRATA_V1_2372203
 
+# Flag to apply erratum 2701953 workaround to non-arm interconnect ip. This
+# erratum applies to revisions r0p0, r1p0, r1p1 of the Neoverse V1 cpu,
+# it is fixed in r1p2.
+CPU_FLAG_LIST += ERRATA_V1_2701953
+
 # Flag to apply erratum 2743093 workaround during powerdown. This erratum
 # applies to revisions r0p0, r1p0, r1p1 and r1p2  of the Neoverse V1 cpu and is
 # still open.
@@ -581,6 +601,11 @@ CPU_FLAG_LIST += ERRATA_A710_2008768
 # to revision r0p0, r1p0 and r2p0 of the Cortex-A710 cpu and is fixed in r2p1.
 CPU_FLAG_LIST += ERRATA_A710_2371105
 
+# Flag to apply erratum 2701952 workaround for non-arm interconnect ip. This
+# erratum applies to revision r0p0, r1p0, r2p0, r2p1 of the Cortex-A710 cpu
+# and is still open.
+CPU_FLAG_LIST += ERRATA_A710_2701952
+
 # Flag to apply erratum 2768515 workaround during power down. This erratum
 # applies to revision r0p0, r1p0, r2p0 and r2p1 of the Cortex-A710 cpu and is
 # still open.
@@ -638,6 +663,11 @@ CPU_FLAG_LIST += ERRATA_N2_2376738
 # to revision r0p0 of the Neoverse N2 cpu, it is fixed in r0p1.
 CPU_FLAG_LIST += ERRATA_N2_2388450
 
+# Flag to apply erratum 2728475 workaround for non-arm interconnect ip. This
+# erratum applies to r0p0, r0p1, r0p2 of the Neoverse N2 cpu, it is fixed in
+# r0p3.
+CPU_FLAG_LIST += ERRATA_N2_2728475
+
 # Flag to apply erratum 2743089 workaround during during powerdown. This erratum
 # applies to all revisions <= r0p2 of the Neoverse N2 cpu, it is fixed in r0p3.
 CPU_FLAG_LIST += ERRATA_N2_2743089
@@ -682,6 +712,11 @@ CPU_FLAG_LIST += ERRATA_X2_2282622
 # to revision r0p0, r1p0 and r2p0 of the Cortex-X2 cpu and is fixed in r2p1.
 CPU_FLAG_LIST += ERRATA_X2_2371105
 
+# Flag to apply erratum 2701952 workaround for non-arm interconnect ip. This
+# erratum applies to revisions r0p0, r1p0, r2p0, r2p1 of the Cortex-x2 cpu
+# and is still open.
+CPU_FLAG_LIST += ERRATA_X2_2701952
+
 # Flag to apply erratum 2768515 workaround during power down. This erratum
 # applies to revision r0p0, r1p0, r2p0 and r2p1 of the Cortex-X2 cpu and is
 # still open.
@@ -743,6 +778,14 @@ CPU_FLAG_LIST += ERRATA_A510_2666669
 # Cortex-A510 cpu and is fixed in r1p3.
 CPU_FLAG_LIST += ERRATA_A510_2684597
 
+# Flag to apply erratum 2719103 workaround for non-arm interconnect ip. This
+# erratum applies to revisions r0p0, rop1. Fixed in r0p2.
+CPU_FLAG_LIST += ERRATA_V2_2719103
+
+# Flag to apply erratum 2701951 workaround for non-arm interconnect ip.
+# This erratum applies to revisions r0p0, r1p0, and r1p1. Its is fixed in r1p2.
+CPU_FLAG_LIST += ERRATA_A715_2701951
+
 # Flag to apply DSU erratum 798953. This erratum applies to DSUs revision r0p0.
 # Applying the workaround results in higher DSU power consumption on idle.
 CPU_FLAG_LIST += ERRATA_DSU_798953
diff --git a/services/std_svc/errata_abi/cpu_errata_info.h b/services/std_svc/errata_abi/cpu_errata_info.h
index ad05724f8..671a6949d 100644
--- a/services/std_svc/errata_abi/cpu_errata_info.h
+++ b/services/std_svc/errata_abi/cpu_errata_info.h
@@ -39,11 +39,12 @@
 #include <cortex_a9.h>
 #endif
 
-#define MAX_ERRATA_ENTRIES	15
+#define MAX_ERRATA_ENTRIES	16
 
 #define ERRATA_LIST_END		(MAX_ERRATA_ENTRIES - 1)
 
-#define UNDEF_ERRATA		{UINT_MAX, UCHAR_MAX, UCHAR_MAX, false}
+/* Default values for unused memory in the array */
+#define UNDEF_ERRATA		{UINT_MAX, UCHAR_MAX, UCHAR_MAX, false, false}
 
 #define EXTRACT_PARTNUM(x)	((x >> MIDR_PN_SHIFT) & MIDR_PN_MASK)
 
@@ -52,7 +53,6 @@
 /*
  * CPU specific values for errata handling
  */
-
 struct em_cpu{
 	unsigned int em_errata_id;
 	unsigned char em_rxpx_lo;	/* lowest revision of errata applicable for the cpu */
diff --git a/services/std_svc/errata_abi/errata_abi_main.c b/services/std_svc/errata_abi/errata_abi_main.c
index d473df6e2..bf9409d06 100644
--- a/services/std_svc/errata_abi/errata_abi_main.c
+++ b/services/std_svc/errata_abi/errata_abi_main.c
@@ -200,10 +200,12 @@ struct em_cpu_list cpu_list[] = {
 		[6] = {2242635, 0x10, 0x12, ERRATA_A78_2242635},
 		[7] = {2376745, 0x00, 0x12, ERRATA_A78_2376745},
 		[8] = {2395406, 0x00, 0x12, ERRATA_A78_2395406},
-		[9] = {2742426, 0x00, 0x12, ERRATA_A78_2742426},
-		[10] = {2772019, 0x00, 0x12, ERRATA_A78_2772019},
-		[11] = {2779479, 0x00, 0x12, ERRATA_A78_2779479},
-		[12 ... ERRATA_LIST_END] = UNDEF_ERRATA,
+		[9] = {2712571, 0x00, 0x12, ERRATA_A78_2712571, \
+			ERRATA_NON_ARM_INTERCONNECT},
+		[10] = {2742426, 0x00, 0x12, ERRATA_A78_2742426},
+		[11] = {2772019, 0x00, 0x12, ERRATA_A78_2772019},
+		[12] = {2779479, 0x00, 0x12, ERRATA_A78_2779479},
+		[13 ... ERRATA_LIST_END] = UNDEF_ERRATA,
 	}
 },
 #endif /* CORTEX_A78_H_INC */
@@ -216,7 +218,9 @@ struct em_cpu_list cpu_list[] = {
 		[1] = {1951502, 0x00, 0x01, ERRATA_A78_AE_1951502},
 		[2] = {2376748, 0x00, 0x01, ERRATA_A78_AE_2376748},
 		[3] = {2395408, 0x00, 0x01, ERRATA_A78_AE_2395408},
-		[4 ... ERRATA_LIST_END] = UNDEF_ERRATA,
+		[4] = {2712574, 0x00, 0x02, ERRATA_A78_AE_2712574, \
+			ERRATA_NON_ARM_INTERCONNECT},
+		[5 ... ERRATA_LIST_END] = UNDEF_ERRATA,
 	}
 },
 #endif /* CORTEX_A78_AE_H_INC */
@@ -229,9 +233,11 @@ struct em_cpu_list cpu_list[] = {
 		[1] = {2242638, 0x01, 0x02, ERRATA_A78C_2242638},
 		[2] = {2376749, 0x01, 0x02, ERRATA_A78C_2376749},
 		[3] = {2395411, 0x01, 0x02, ERRATA_A78C_2395411},
-		[4] = {2772121, 0x00, 0x02, ERRATA_A78C_2772121},
-		[5] = {2779484, 0x01, 0x02, ERRATA_A78C_2779484},
-		[6 ... ERRATA_LIST_END] = UNDEF_ERRATA,
+		[4] = {2712575, 0x01, 0x02, ERRATA_A78C_2712575, \
+			ERRATA_NON_ARM_INTERCONNECT},
+		[5] = {2772121, 0x00, 0x02, ERRATA_A78C_2772121},
+		[6] = {2779484, 0x01, 0x02, ERRATA_A78C_2779484},
+		[7 ... ERRATA_LIST_END] = UNDEF_ERRATA,
 	}
 },
 #endif /* CORTEX_A78C_H_INC */
@@ -287,9 +293,11 @@ struct em_cpu_list cpu_list[] = {
 		[9] = {2216392, 0x10, 0x11, ERRATA_V1_2216392},
 		[10] = {2294912, 0x00, 0x11, ERRATA_V1_2294912},
 		[11] = {2372203, 0x00, 0x11, ERRATA_V1_2372203},
-		[12] = {2743093, 0x00, 0x12, ERRATA_V1_2743093},
-		[13] = {2779461, 0x00, 0x12, ERRATA_V1_2779461},
-		[14 ... ERRATA_LIST_END] = UNDEF_ERRATA,
+		[12] = {2701953, 0x00, 0x11, ERRATA_V1_2701953, \
+			ERRATA_NON_ARM_INTERCONNECT},
+		[13] = {2743093, 0x00, 0x12, ERRATA_V1_2743093},
+		[14] = {2779461, 0x00, 0x12, ERRATA_V1_2779461},
+		[15 ... ERRATA_LIST_END] = UNDEF_ERRATA,
 	}
 },
 #endif /* NEOVERSE_V1_H_INC */
@@ -312,7 +320,9 @@ struct em_cpu_list cpu_list[] = {
 		[11] = {2282622, 0x00, 0x21, ERRATA_A710_2282622},
 		[12] = {2291219, 0x00, 0x20, ERRATA_A710_2291219},
 		[13] = {2371105, 0x00, 0x20, ERRATA_A710_2371105},
-		[14] = {2768515, 0x00, 0x21, ERRATA_A710_2768515}
+		[14] = {2701952, 0x00, 0x21, ERRATA_A710_2701952, \
+			ERRATA_NON_ARM_INTERCONNECT},
+		[15] = {2768515, 0x00, 0x21, ERRATA_A710_2768515}
 	}
 },
 #endif /* CORTEX_A710_H_INC */
@@ -334,8 +344,10 @@ struct em_cpu_list cpu_list[] = {
 		[10] = {2326639, 0x00, 0x00, ERRATA_N2_2326639},
 		[11] = {2376738, 0x00, 0x00, ERRATA_N2_2376738},
 		[12] = {2388450, 0x00, 0x00, ERRATA_N2_2388450},
-		[13] = {2743089, 0x00, 0x02, ERRATA_N2_2743089},
-		[14 ... ERRATA_LIST_END] = UNDEF_ERRATA,
+		[13] = {2728475, 0x00, 0x02, ERRATA_N2_2728475, \
+			ERRATA_NON_ARM_INTERCONNECT},
+		[14] = {2743089, 0x00, 0x02, ERRATA_N2_2743089},
+		[15 ... ERRATA_LIST_END] = UNDEF_ERRATA,
 	}
 },
 #endif /* NEOVERSE_N2_H_INC */
@@ -353,8 +365,10 @@ struct em_cpu_list cpu_list[] = {
 		[6] = {2216384, 0x00, 0x20, ERRATA_X2_2216384},
 		[7] = {2282622, 0x00, 0x21, ERRATA_X2_2282622},
 		[8] = {2371105, 0x00, 0x21, ERRATA_X2_2371105},
-		[9] = {2768515, 0x00, 0x21, ERRATA_X2_2768515},
-		[10 ... ERRATA_LIST_END] = UNDEF_ERRATA,
+		[9] = {2701952, 0x00, 0x21, ERRATA_X2_2701952, \
+			ERRATA_NON_ARM_INTERCONNECT},
+		[10] = {2768515, 0x00, 0x21, ERRATA_X2_2768515},
+		[11 ... ERRATA_LIST_END] = UNDEF_ERRATA,
 	}
 },
 #endif /* CORTEX_X2_H_INC */
@@ -378,6 +392,28 @@ struct em_cpu_list cpu_list[] = {
 	}
 },
 #endif /* CORTEX_A510_H_INC */
+
+#if NEOVERSE_V2_H_INC
+{
+	.cpu_partnumber = NEOVERSE_V2_MIDR,
+	.cpu_errata_list = {
+		[0] = {2719103, 0x00, 0x01, ERRATA_V2_2719103, \
+			ERRATA_NON_ARM_INTERCONNECT},
+		[1 ... ERRATA_LIST_END] = UNDEF_ERRATA,
+	}
+},
+#endif /* NEOVERSE_V2_H_INC */
+
+#if CORTEX_A715_H_INC
+{
+	.cpu_partnumber = CORTEX_MAKALU_MIDR,
+	.cpu_errata_list = {
+		[0] = {2701951, 0x00, 0x11, ERRATA_A715_2701951, \
+			ERRATA_NON_ARM_INTERCONNECT},
+		[1 ... ERRATA_LIST_END] = UNDEF_ERRATA,
+	}
+},
+#endif /* CORTEX_A715_H_INC */
 };
 
 /*