diff --git a/lib/cpus/aarch64/cortex_a55.S b/lib/cpus/aarch64/cortex_a55.S
index 1da80ef..b9a3f36 100644
--- a/lib/cpus/aarch64/cortex_a55.S
+++ b/lib/cpus/aarch64/cortex_a55.S
@@ -173,6 +173,10 @@
 func cortex_a55_reset_func
 	mov	x19, x30
 
+#if ERRATA_DSU_798953
+	bl	errata_dsu_798953_wa
+#endif
+
 #if ERRATA_DSU_936184
 	bl	errata_dsu_936184_wa
 #endif
@@ -237,6 +241,7 @@
 	 * Report all errata. The revision variant information is at x8, where
 	 * "report_errata" is expecting it and it doesn't corrupt it.
 	 */
+	report_errata ERRATA_DSU_798953, cortex_a55, dsu_798953
 	report_errata ERRATA_DSU_936184, cortex_a55, dsu_936184
 	report_errata ERRATA_A55_768277, cortex_a55, 768277
 	report_errata ERRATA_A55_778703, cortex_a55, 778703
diff --git a/lib/cpus/aarch64/cortex_a75.S b/lib/cpus/aarch64/cortex_a75.S
index 2040188..fda1aec 100644
--- a/lib/cpus/aarch64/cortex_a75.S
+++ b/lib/cpus/aarch64/cortex_a75.S
@@ -100,6 +100,10 @@
 	isb
 #endif
 
+#if ERRATA_DSU_798953
+	bl	errata_dsu_798953_wa
+#endif
+
 #if ERRATA_DSU_936184
 	bl	errata_dsu_936184_wa
 #endif
@@ -186,6 +190,7 @@
 	report_errata ERRATA_A75_790748, cortex_a75, 790748
 	report_errata WORKAROUND_CVE_2017_5715, cortex_a75, cve_2017_5715
 	report_errata WORKAROUND_CVE_2018_3639, cortex_a75, cve_2018_3639
+	report_errata ERRATA_DSU_798953, cortex_a75, dsu_798953
 	report_errata ERRATA_DSU_936184, cortex_a75, dsu_936184
 
 	ldp	x8, x30, [sp], #16
diff --git a/lib/cpus/aarch64/cortex_a76.S b/lib/cpus/aarch64/cortex_a76.S
index e544018..4bf6e77 100644
--- a/lib/cpus/aarch64/cortex_a76.S
+++ b/lib/cpus/aarch64/cortex_a76.S
@@ -344,9 +344,14 @@
 #endif /* DYNAMIC_WORKAROUND_CVE_2018_3639 */
 #endif /* WORKAROUND_CVE_2018_3639 */
 
+#if ERRATA_DSU_798953
+	bl	errata_dsu_798953_wa
+#endif
+
 #if ERRATA_DSU_936184
 	bl	errata_dsu_936184_wa
 #endif
+
 	ret	x19
 endfunc cortex_a76_reset_func
 
@@ -368,7 +373,7 @@
 
 #if REPORT_ERRATA
 /*
- * Errata printing function for Cortex Cortex A76. Must follow AAPCS.
+ * Errata printing function for Cortex A76. Must follow AAPCS.
  */
 func cortex_a76_errata_report
 	stp	x8, x30, [sp, #-16]!
@@ -384,6 +389,7 @@
 	report_errata ERRATA_A76_1130799, cortex_a76, 1130799
 	report_errata ERRATA_A76_1220197, cortex_a76, 1220197
 	report_errata WORKAROUND_CVE_2018_3639, cortex_a76, cve_2018_3639
+	report_errata ERRATA_DSU_798953, cortex_a76, dsu_798953
 	report_errata ERRATA_DSU_936184, cortex_a76, dsu_936184
 
 	ldp	x8, x30, [sp], #16
diff --git a/lib/cpus/aarch64/dsu_helpers.S b/lib/cpus/aarch64/dsu_helpers.S
index 29870a4..100ffaa 100644
--- a/lib/cpus/aarch64/dsu_helpers.S
+++ b/lib/cpus/aarch64/dsu_helpers.S
@@ -9,6 +9,59 @@
 #include <lib/cpus/errata_report.h>
 
 	/* -----------------------------------------------------------------------
+	 * DSU erratum 798953 check function
+	 * Checks the DSU variant, revision and configuration to determine if
+	 * the erratum applies. Erratum applies on all configurations of the
+	 * DSU and if revision-variant is r0p0.
+	 *
+	 * The erratum was fixed in r0p1.
+	 *
+	 * This function is called from both assembly and C environment. So it
+	 * follows AAPCS.
+	 *
+	 * Clobbers: x0-x3
+	 * -----------------------------------------------------------------------
+	 */
+	.globl	check_errata_dsu_798953
+	.globl	errata_dsu_798953_wa
+
+func check_errata_dsu_798953
+	mov	x2, #ERRATA_APPLIES
+	mov	x3, #ERRATA_NOT_APPLIES
+
+	/* Check if DSU is equal to r0p0 */
+	mrs	x1, CLUSTERIDR_EL1
+
+	/* DSU variant and revision bitfields in CLUSTERIDR are adjacent */
+	ubfx	x0, x1, #CLUSTERIDR_REV_SHIFT,\
+			#(CLUSTERIDR_REV_BITS + CLUSTERIDR_VAR_BITS)
+	mov	x1, #(0x0 << CLUSTERIDR_REV_SHIFT)
+	cmp	x0, x1
+	csel	x0, x2, x3, EQ
+	ret
+endfunc check_errata_dsu_798953
+
+	/* --------------------------------------------------
+	 * Errata Workaround for DSU erratum #798953.
+	 *
+	 * Can clobber only: x0-x17
+	 * --------------------------------------------------
+	 */
+func errata_dsu_798953_wa
+	mov	x17, x30
+	bl	check_errata_dsu_798953
+	cbz	x0, 1f
+
+	/* If erratum applies, disable high-level clock gating */
+	mrs	x0, CLUSTERACTLR_EL1
+	orr	x0, x0, #CLUSTERACTLR_EL1_DISABLE_CLOCK_GATING
+	msr	CLUSTERACTLR_EL1, x0
+	isb
+1:
+	ret	x17
+endfunc errata_dsu_798953_wa
+
+	/* -----------------------------------------------------------------------
 	 * DSU erratum 936184 check function
 	 * Checks the DSU variant, revision and configuration to determine if
 	 * the erratum applies. Erratum applies if ACP interface is present