arm64: capabilities: Merge duplicate Cavium erratum entries

mainline inclusion
from mainline-v5.0-rc1
commit f58cdf7e
category: bugfix
bugzilla: 46773
CVE: NA
References: https://gitee.com/src-openeuler/kernel/issues/I235Y8



---------------------------

Merge duplicate entries for a single capability using the midr
range list for Cavium errata 30115 and 27456.

Cc: Andrew Pinski <apinski@cavium.com>
Cc: David Daney <david.daney@cavium.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Vladimir Murzin <vladimir.murzin@arm.com>
Tested-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
Reviewed-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>

arch/arm64/include/asm/cputype.h

@@ -149,6 +149,7 @@ struct midr_range {
 	}
 
 #define MIDR_REV_RANGE(m, v, r_min, r_max) MIDR_RANGE(m, v, r_min, v, r_max)
+#define MIDR_REV(m, v, r) MIDR_RANGE(m, v, r, v, r)
 #define MIDR_ALL_VERSIONS(m) MIDR_RANGE(m, 0, 0, 0xf, 0xf)
 
 static inline bool midr_is_cpu_model_range(u32 midr, u32 model, u32 rv_min,

arch/arm64/kernel/cpu_errata.c

@@ -730,6 +730,28 @@ static const struct midr_range arm64_harden_el2_vectors[] = {
 
 #endif
 
+#ifdef CONFIG_CAVIUM_ERRATUM_27456
+static const struct midr_range cavium_erratum_27456_cpus[] = {
+	/* Cavium ThunderX, T88 pass 1.x - 2.1 */
+	MIDR_RANGE(MIDR_THUNDERX, 0, 0, 1, 1),
+	/* Cavium ThunderX, T81 pass 1.0 */
+	MIDR_REV(MIDR_THUNDERX_81XX, 0, 0),
+	{},
+};
+#endif
+
+#ifdef CONFIG_CAVIUM_ERRATUM_30115
+static const struct midr_range cavium_erratum_30115_cpus[] = {
+	/* Cavium ThunderX, T88 pass 1.x - 2.2 */
+	MIDR_RANGE(MIDR_THUNDERX, 0, 0, 1, 2),
+	/* Cavium ThunderX, T81 pass 1.0 - 1.2 */
+	MIDR_REV_RANGE(MIDR_THUNDERX_81XX, 0, 0, 2),
+	/* Cavium ThunderX, T83 pass 1.0 */
+	MIDR_REV(MIDR_THUNDERX_83XX, 0, 0),
+	{},
+};
+#endif
+
 #ifdef CONFIG_ARM64_WORKAROUND_CLEAN_CACHE
 static const struct midr_range workaround_clean_cache[] = {
 #if	defined(CONFIG_ARM64_ERRATUM_826319) || \
@@ -802,40 +824,16 @@ const struct arm64_cpu_capabilities arm64_errata[] = {
 #endif
 #ifdef CONFIG_CAVIUM_ERRATUM_27456
 	{
-	/* Cavium ThunderX, T88 pass 1.x - 2.1 */
 		.desc = "Cavium erratum 27456",
 		.capability = ARM64_WORKAROUND_CAVIUM_27456,
-		ERRATA_MIDR_RANGE(MIDR_THUNDERX,
-				  0, 0,
-				  1, 1),
-	},
-	{
-	/* Cavium ThunderX, T81 pass 1.0 */
-		.desc = "Cavium erratum 27456",
-		.capability = ARM64_WORKAROUND_CAVIUM_27456,
-		ERRATA_MIDR_REV(MIDR_THUNDERX_81XX, 0, 0),
+		ERRATA_MIDR_RANGE_LIST(cavium_erratum_27456_cpus),
 	},
 #endif
 #ifdef CONFIG_CAVIUM_ERRATUM_30115
 	{
-	/* Cavium ThunderX, T88 pass 1.x - 2.2 */
-		.desc = "Cavium erratum 30115",
-		.capability = ARM64_WORKAROUND_CAVIUM_30115,
-		ERRATA_MIDR_RANGE(MIDR_THUNDERX,
-				      0, 0,
-				      1, 2),
-	},
-	{
-	/* Cavium ThunderX, T81 pass 1.0 - 1.2 */
-		.desc = "Cavium erratum 30115",
-		.capability = ARM64_WORKAROUND_CAVIUM_30115,
-		ERRATA_MIDR_REV_RANGE(MIDR_THUNDERX_81XX, 0, 0, 2),
-	},
-	{
-	/* Cavium ThunderX, T83 pass 1.0 */
 		.desc = "Cavium erratum 30115",
 		.capability = ARM64_WORKAROUND_CAVIUM_30115,
-		ERRATA_MIDR_REV(MIDR_THUNDERX_83XX, 0, 0),
+		ERRATA_MIDR_RANGE_LIST(cavium_erratum_30115_cpus),
 	},
 #endif
 	{