Print erratum application report for CVE-2017-5715

Even though the workaround for CVE-2017-5715 is not a CPU erratum, the
code is piggybacking on the errata framework to print whether the
workaround was applied, missing or not needed.

Change-Id: I821197a4b8560c73fd894cd7cd9ecf9503c72fa3
Signed-off-by: Dimitris Papastamos <dimitris.papastamos@arm.com>
Reviewed-on: http://vgitil04.il.marvell.com:8080/52571
Tested-by: iSoC Platform CI <ykjenk@marvell.com>
Reviewed-by: Kostya Porotchkin <kostap@marvell.com>

3 files changed, 80 insertions, 53 deletions

diff --git a/lib/cpus/aarch64/cortex_a57.S b/lib/cpus/aarch64/cortex_a57.S
index c3709457..79862101 100644
--- a/lib/cpus/aarch64/cortex_a57.S
+++ b/lib/cpus/aarch64/cortex_a57.S
@@ -1,31 +1,7 @@
 /*
- * Copyright (c) 2014-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2014-2018, ARM Limited and Contributors. All rights reserved.
  *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * Redistributions of source code must retain the above copyright notice, this
- * list of conditions and the following disclaimer.
- *
- * Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * Neither the name of ARM nor the names of its contributors may be used
- * to endorse or promote products derived from this software without specific
- * prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
+ * SPDX-License-Identifier: BSD-3-Clause
  */
 #include <arch.h>
 #include <asm_macros.S>
@@ -312,6 +288,39 @@ func check_errata_833471
 	b	cpu_rev_var_ls
 endfunc check_errata_833471
 
+	/* --------------------------------------------------
+	 * Errata Workaround for Cortex A57 Errata #859972.
+	 * This applies only to revision <= r1p3 of Cortex A57.
+	 * Inputs:
+	 * x0: variant[4:7] and revision[0:3] of current cpu.
+	 * Shall clobber:
+	 * --------------------------------------------------
+	 */
+func errata_a57_859972_wa
+	mov	x17, x30
+	bl	check_errata_859972
+	cbz	x0, 1f
+	mrs	x1, CPUACTLR_EL1
+	orr	x1, x1, #CPUACTLR_EL1_DIS_INSTR_PREFETCH
+	msr	CPUACTLR_EL1, x1
+1:
+	ret	x17
+endfunc errata_a57_859972_wa
+
+func check_errata_859972
+	mov	x1, #0x13
+	b	cpu_rev_var_ls
+endfunc check_errata_859972
+
+func check_errata_cve_2017_5715
+#if WORKAROUND_CVE_2017_5715
+	mov	x0, #ERRATA_APPLIES
+#else
+	mov	x0, #ERRATA_MISSING
+#endif
+	ret
+endfunc check_errata_cve_2017_5715
+
 	/* -------------------------------------------------
 	 * The CPU Ops reset function for Cortex-A57.
 	 * Shall clobber: x0-x19
@@ -495,6 +504,8 @@ func cortex_a57_errata_report
 	report_errata ERRATA_A57_828024, cortex_a57, 828024
 	report_errata ERRATA_A57_829520, cortex_a57, 829520
 	report_errata ERRATA_A57_833471, cortex_a57, 833471
+	report_errata ERRATA_A57_859972, cortex_a57, 859972
+	report_errata WORKAROUND_CVE_2017_5715, cortex_a57, cve_2017_5715
 
 	ldp	x8, x30, [sp], #16
 	ret
diff --git a/lib/cpus/aarch64/cortex_a72.S b/lib/cpus/aarch64/cortex_a72.S
index 0210bdcd..b3660893 100644
--- a/lib/cpus/aarch64/cortex_a72.S
+++ b/lib/cpus/aarch64/cortex_a72.S
@@ -1,31 +1,7 @@
 /*
- * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
  *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * Redistributions of source code must retain the above copyright notice, this
- * list of conditions and the following disclaimer.
- *
- * Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * Neither the name of ARM nor the names of its contributors may be used
- * to endorse or promote products derived from this software without specific
- * prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
+ * SPDX-License-Identifier: BSD-3-Clause
  */
 #include <arch.h>
 #include <asm_macros.S>
@@ -121,6 +97,15 @@ func check_errata_859971
 	b	cpu_rev_var_ls
 endfunc check_errata_859971
 
+func check_errata_cve_2017_5715
+#if WORKAROUND_CVE_2017_5715
+	mov	x0, #ERRATA_APPLIES
+#else
+	mov	x0, #ERRATA_MISSING
+#endif
+	ret
+endfunc check_errata_cve_2017_5715
+
 	/* -------------------------------------------------
 	 * The CPU Ops reset function for Cortex-A72.
 	 * -------------------------------------------------
@@ -273,6 +258,7 @@ func cortex_a72_errata_report
 	 * checking functions of each errata.
 	 */
 	report_errata ERRATA_A72_859971, cortex_a72, 859971
+	report_errata WORKAROUND_CVE_2017_5715, cortex_a72, cve_2017_5715
 
 	ldp	x8, x30, [sp], #16
 	ret
diff --git a/lib/cpus/aarch64/cortex_a73.S b/lib/cpus/aarch64/cortex_a73.S
index e1615dbd..93ea401e 100644
--- a/lib/cpus/aarch64/cortex_a73.S
+++ b/lib/cpus/aarch64/cortex_a73.S
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
@@ -133,6 +133,36 @@ func cortex_a73_cluster_pwr_dwn
 	b	cortex_a73_disable_smp
 endfunc cortex_a73_cluster_pwr_dwn
 
+func check_errata_cve_2017_5715
+#if WORKAROUND_CVE_2017_5715
+	mov	x0, #ERRATA_APPLIES
+#else
+	mov	x0, #ERRATA_MISSING
+#endif
+	ret
+endfunc check_errata_cve_2017_5715
+
+#if REPORT_ERRATA
+/*
+ * Errata printing function for Cortex A75. Must follow AAPCS.
+ */
+func cortex_a73_errata_report
+	stp	x8, x30, [sp, #-16]!
+
+	bl	cpu_get_rev_var
+	mov	x8, x0
+
+	/*
+	 * Report all errata. The revision-variant information is passed to
+	 * checking functions of each errata.
+	 */
+	report_errata WORKAROUND_CVE_2017_5715, cortex_a73, cve_2017_5715
+
+	ldp	x8, x30, [sp], #16
+	ret
+endfunc cortex_a73_errata_report
+#endif
+
 	/* ---------------------------------------------
 	 * This function provides cortex_a73 specific
 	 * register information for crash reporting.