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-rw-r--r--lib/cpus/aarch64/neoverse_n2.S273
1 files changed, 236 insertions, 37 deletions
diff --git a/lib/cpus/aarch64/neoverse_n2.S b/lib/cpus/aarch64/neoverse_n2.S
index 8d646cba5f..a85d956820 100644
--- a/lib/cpus/aarch64/neoverse_n2.S
+++ b/lib/cpus/aarch64/neoverse_n2.S
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2020, Arm Limited. All rights reserved.
+ * Copyright (c) 2020-2023, Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -8,6 +8,7 @@
#include <asm_macros.S>
#include <cpu_macros.S>
#include <neoverse_n2.h>
+#include "wa_cve_2022_23960_bhb_vector.S"
/* Hardware handled coherency */
#if HW_ASSISTED_COHERENCY == 0
@@ -19,11 +20,225 @@
#error "Neoverse-N2 supports only AArch64. Compile with CTX_INCLUDE_AARCH32_REGS=0"
#endif
- /* -------------------------------------------------
+#if WORKAROUND_CVE_2022_23960
+ wa_cve_2022_23960_bhb_vector_table NEOVERSE_N2_BHB_LOOP_COUNT, neoverse_n2
+#endif /* WORKAROUND_CVE_2022_23960 */
+
+/*
+ * ERRATA_DSU_2313941:
+ * The errata is defined in dsu_helpers.S and applies to Neoverse N2.
+ * Henceforth creating symbolic names to the already existing errata
+ * workaround functions to get them registered under the Errata Framework.
+ */
+.equ check_erratum_neoverse_n2_2313941, check_errata_dsu_2313941
+.equ erratum_neoverse_n2_2313941_wa, errata_dsu_2313941_wa
+add_erratum_entry neoverse_n2, ERRATUM(2313941), ERRATA_DSU_2313941, APPLY_AT_RESET
+
+workaround_reset_start neoverse_n2, ERRATUM(2002655), ERRATA_N2_2002655
+ /* Apply instruction patching sequence */
+ ldr x0,=0x6
+ msr S3_6_c15_c8_0,x0
+ ldr x0,=0xF3A08002
+ msr S3_6_c15_c8_2,x0
+ ldr x0,=0xFFF0F7FE
+ msr S3_6_c15_c8_3,x0
+ ldr x0,=0x40000001003ff
+ msr S3_6_c15_c8_1,x0
+ ldr x0,=0x7
+ msr S3_6_c15_c8_0,x0
+ ldr x0,=0xBF200000
+ msr S3_6_c15_c8_2,x0
+ ldr x0,=0xFFEF0000
+ msr S3_6_c15_c8_3,x0
+ ldr x0,=0x40000001003f3
+ msr S3_6_c15_c8_1,x0
+workaround_reset_end neoverse_n2, ERRATUM(2002655)
+
+check_erratum_ls neoverse_n2, ERRATUM(2002655), CPU_REV(0, 0)
+
+workaround_reset_start neoverse_n2, ERRATUM(2025414), ERRATA_N2_2025414
+ sysreg_bit_set NEOVERSE_N2_CPUECTLR_EL1, NEOVERSE_N2_CPUECTLR_EL1_PFSTIDIS_BIT
+workaround_reset_end neoverse_n2, ERRATUM(2025414)
+
+check_erratum_ls neoverse_n2, ERRATUM(2025414), CPU_REV(0, 0)
+
+workaround_reset_start neoverse_n2, ERRATUM(2067956), ERRATA_N2_2067956
+ sysreg_bit_set NEOVERSE_N2_CPUACTLR_EL1, NEOVERSE_N2_CPUACTLR_EL1_BIT_46
+workaround_reset_end neoverse_n2, ERRATUM(2067956)
+
+check_erratum_ls neoverse_n2, ERRATUM(2067956), CPU_REV(0, 0)
+
+workaround_runtime_start neoverse_n2, ERRATUM(2009478), ERRATA_N2_2009478
+ /* Stash ERRSELR_EL1 in x2 */
+ mrs x2, ERRSELR_EL1
+
+ /* Select error record 0 and clear ED bit */
+ msr ERRSELR_EL1, xzr
+ mrs x1, ERXCTLR_EL1
+ bfi x1, xzr, #ERXCTLR_ED_SHIFT, #1
+ msr ERXCTLR_EL1, x1
+
+ /* Restore ERRSELR_EL1 from x2 */
+ msr ERRSELR_EL1, x2
+workaround_runtime_end neoverse_n2, ERRATUM(2009478), NO_ISB
+
+check_erratum_ls neoverse_n2, ERRATUM(2009478), CPU_REV(0, 0)
+
+workaround_reset_start neoverse_n2, ERRATUM(2138953), ERRATA_N2_2138953
+ /* Apply instruction patching sequence */
+ mrs x1, NEOVERSE_N2_CPUECTLR2_EL1
+ mov x0, #NEOVERSE_N2_CPUECTLR2_EL1_PF_MODE_CNSRV
+ bfi x1, x0, #CPUECTLR2_EL1_PF_MODE_LSB, #CPUECTLR2_EL1_PF_MODE_WIDTH
+ msr NEOVERSE_N2_CPUECTLR2_EL1, x1
+workaround_reset_end neoverse_n2, ERRATUM(2138953)
+
+check_erratum_ls neoverse_n2, ERRATUM(2138953), CPU_REV(0, 3)
+
+workaround_reset_start neoverse_n2, ERRATUM(2138956), ERRATA_N2_2138956
+ /* Apply instruction patching sequence */
+ ldr x0,=0x3
+ msr S3_6_c15_c8_0,x0
+ ldr x0,=0xF3A08002
+ msr S3_6_c15_c8_2,x0
+ ldr x0,=0xFFF0F7FE
+ msr S3_6_c15_c8_3,x0
+ ldr x0,=0x10002001003FF
+ msr S3_6_c15_c8_1,x0
+ ldr x0,=0x4
+ msr S3_6_c15_c8_0,x0
+ ldr x0,=0xBF200000
+ msr S3_6_c15_c8_2,x0
+ ldr x0,=0xFFEF0000
+ msr S3_6_c15_c8_3,x0
+ ldr x0,=0x10002001003F3
+ msr S3_6_c15_c8_1,x0
+workaround_reset_end neoverse_n2, ERRATUM(2138956)
+
+check_erratum_ls neoverse_n2, ERRATUM(2138956), CPU_REV(0, 0)
+
+
+workaround_reset_start neoverse_n2, ERRATUM(2138958), ERRATA_N2_2138958
+ /* Apply instruction patching sequence */
+ sysreg_bit_set NEOVERSE_N2_CPUACTLR5_EL1, NEOVERSE_N2_CPUACTLR5_EL1_BIT_13
+workaround_reset_end neoverse_n2, ERRATUM(2138958)
+
+check_erratum_ls neoverse_n2, ERRATUM(2138958), CPU_REV(0, 0)
+
+workaround_reset_start neoverse_n2, ERRATUM(2189731), ERRATA_N2_2189731
+ sysreg_bit_set NEOVERSE_N2_CPUACTLR5_EL1, NEOVERSE_N2_CPUACTLR5_EL1_BIT_44
+workaround_reset_end neoverse_n2, ERRATUM(2189731)
+
+check_erratum_ls neoverse_n2, ERRATUM(2189731), CPU_REV(0, 0)
+
+workaround_reset_start neoverse_n2, ERRATUM(2242400), ERRATA_N2_2242400
+ /* Apply instruction patching sequence */
+ sysreg_bit_set NEOVERSE_N2_CPUACTLR5_EL1, NEOVERSE_N2_CPUACTLR5_EL1_BIT_17
+ ldr x0, =0x2
+ msr S3_6_c15_c8_0, x0
+ ldr x0, =0x10F600E000
+ msr S3_6_c15_c8_2, x0
+ ldr x0, =0x10FF80E000
+ msr S3_6_c15_c8_3, x0
+ ldr x0, =0x80000000003FF
+ msr S3_6_c15_c8_1, x0
+workaround_reset_end neoverse_n2, ERRATUM(2242400)
+
+check_erratum_ls neoverse_n2, ERRATUM(2242400), CPU_REV(0, 0)
+
+workaround_reset_start neoverse_n2, ERRATUM(2242415), ERRATA_N2_2242415
+ sysreg_bit_set NEOVERSE_N2_CPUACTLR_EL1, NEOVERSE_N2_CPUACTLR_EL1_BIT_22
+workaround_reset_end neoverse_n2, ERRATUM(2242415)
+
+check_erratum_ls neoverse_n2, ERRATUM(2242415), CPU_REV(0, 0)
+
+workaround_reset_start neoverse_n2, ERRATUM(2280757), ERRATA_N2_2280757
+ /* Apply instruction patching sequence */
+ sysreg_bit_set NEOVERSE_N2_CPUACTLR_EL1, NEOVERSE_N2_CPUACTLR_EL1_BIT_22
+workaround_reset_end neoverse_n2, ERRATUM(2280757)
+
+check_erratum_ls neoverse_n2, ERRATUM(2280757), CPU_REV(0, 0)
+
+workaround_runtime_start neoverse_n2, ERRATUM(2326639), ERRATA_N2_2326639
+ /* Set bit 36 in ACTLR2_EL1 */
+ sysreg_bit_set NEOVERSE_N2_CPUACTLR2_EL1, NEOVERSE_N2_CPUACTLR2_EL1_BIT_36
+workaround_runtime_end neoverse_n2, ERRATUM(2326639)
+
+check_erratum_ls neoverse_n2, ERRATUM(2326639), CPU_REV(0, 0)
+
+workaround_runtime_start neoverse_n2, ERRATUM(2340933), ERRATA_N2_2340933
+ /* Set bit 61 in CPUACTLR5_EL1 */
+ sysreg_bit_set NEOVERSE_N2_CPUACTLR5_EL1, BIT(61)
+workaround_runtime_end neoverse_n2, ERRATUM(2340933)
+
+check_erratum_ls neoverse_n2, ERRATUM(2340933), CPU_REV(0, 0)
+
+workaround_runtime_start neoverse_n2, ERRATUM(2346952), ERRATA_N2_2346952
+ /* Set TXREQ to STATIC and full L2 TQ size */
+ mrs x1, NEOVERSE_N2_CPUECTLR2_EL1
+ mov x0, #CPUECTLR2_EL1_TXREQ_STATIC_FULL
+ bfi x1, x0, #CPUECTLR2_EL1_TXREQ_LSB, #CPUECTLR2_EL1_TXREQ_WIDTH
+ msr NEOVERSE_N2_CPUECTLR2_EL1, x1
+workaround_runtime_end neoverse_n2, ERRATUM(2346952)
+
+check_erratum_ls neoverse_n2, ERRATUM(2346952), CPU_REV(0, 2)
+
+workaround_reset_start neoverse_n2, ERRATUM(2376738), ERRATA_N2_2376738
+ /* Set CPUACTLR2_EL1[0] to 1 to force PLDW/PFRM
+ * ST to behave like PLD/PFRM LD and not cause
+ * invalidations to other PE caches.
+ */
+ sysreg_bit_set NEOVERSE_N2_CPUACTLR2_EL1, NEOVERSE_N2_CPUACTLR2_EL1_BIT_0
+workaround_reset_end neoverse_n2, ERRATUM(2376738)
+
+check_erratum_ls neoverse_n2, ERRATUM(2376738), CPU_REV(0, 3)
+
+workaround_reset_start neoverse_n2, ERRATUM(2388450), ERRATA_N2_2388450
+ /*Set bit 40 in ACTLR2_EL1 */
+ sysreg_bit_set NEOVERSE_N2_CPUACTLR2_EL1, NEOVERSE_N2_CPUACTLR2_EL1_BIT_40
+workaround_reset_end neoverse_n2, ERRATUM(2388450)
+
+check_erratum_ls neoverse_n2, ERRATUM(2388450), CPU_REV(0, 0)
+
+workaround_reset_start neoverse_n2, ERRATUM(2743014), ERRATA_N2_2743014
+ /* Set CPUACTLR5_EL1[56:55] to 2'b01 */
+ sysreg_bit_set NEOVERSE_N2_CPUACTLR5_EL1, NEOVERSE_N2_CPUACTLR5_EL1_BIT_55
+ sysreg_bit_clear NEOVERSE_N2_CPUACTLR5_EL1, NEOVERSE_N2_CPUACTLR5_EL1_BIT_56
+workaround_reset_end neoverse_n2, ERRATUM(2743014)
+
+check_erratum_ls neoverse_n2, ERRATUM(2743014), CPU_REV(0, 2)
+
+workaround_runtime_start neoverse_n2, ERRATUM(2743089), ERRATA_N2_2743089
+ /* dsb before isb of power down sequence */
+ dsb sy
+workaround_runtime_end neoverse_n2, ERRATUM(2743089)
+
+check_erratum_ls neoverse_n2, ERRATUM(2743089), CPU_REV(0, 2)
+
+workaround_reset_start neoverse_n2, ERRATUM(2779511), ERRATA_N2_2779511
+ /* Set bit 47 in ACTLR3_EL1 */
+ sysreg_bit_set NEOVERSE_N2_CPUACTLR3_EL1, NEOVERSE_N2_CPUACTLR3_EL1_BIT_47
+workaround_reset_end neoverse_n2, ERRATUM(2779511)
+
+check_erratum_ls neoverse_n2, ERRATUM(2779511), CPU_REV(0, 2)
+
+workaround_reset_start neoverse_n2, CVE(2022,23960), WORKAROUND_CVE_2022_23960
+#if IMAGE_BL31
+ /*
+ * The Neoverse-N2 generic vectors are overridden to apply errata
+ * mitigation on exception entry from lower ELs.
+ */
+ override_vector_table wa_cve_vbar_neoverse_n2
+#endif /* IMAGE_BL31 */
+workaround_reset_end neoverse_n2, CVE(2022,23960)
+
+check_erratum_chosen neoverse_n2, CVE(2022, 23960), WORKAROUND_CVE_2022_23960
+
+ /* -------------------------------------------
* The CPU Ops reset function for Neoverse N2.
- * -------------------------------------------------
+ * -------------------------------------------
*/
-func neoverse_n2_reset_func
+cpu_reset_func_start neoverse_n2
+
/* Check if the PE implements SSBS */
mrs x0, id_aa64pfr1_el1
tst x0, #(ID_AA64PFR1_EL1_SSBS_MASK << ID_AA64PFR1_EL1_SSBS_SHIFT)
@@ -33,57 +248,41 @@ func neoverse_n2_reset_func
msr SSBS, xzr
1:
/* Force all cacheable atomic instructions to be near */
- mrs x0, NEOVERSE_N2_CPUACTLR2_EL1
- orr x0, x0, #NEOVERSE_N2_CPUACTLR2_EL1_BIT_2
- msr NEOVERSE_N2_CPUACTLR2_EL1, x0
+ sysreg_bit_set NEOVERSE_N2_CPUACTLR2_EL1, NEOVERSE_N2_CPUACTLR2_EL1_BIT_2
-#if ENABLE_AMU
+#if ENABLE_FEAT_AMU
/* Make sure accesses from EL0/EL1 and EL2 are not trapped to EL3 */
- mrs x0, cptr_el3
- orr x0, x0, #TAM_BIT
- msr cptr_el3, x0
-
+ sysreg_bit_clear cptr_el3, TAM_BIT
/* Make sure accesses from EL0/EL1 are not trapped to EL2 */
- mrs x0, cptr_el2
- orr x0, x0, #TAM_BIT
- msr cptr_el2, x0
-
+ sysreg_bit_clear cptr_el2, TAM_BIT
/* No need to enable the counters as this would be done at el3 exit */
#endif
#if NEOVERSE_Nx_EXTERNAL_LLC
/* Some systems may have External LLC, core needs to be made aware */
- mrs x0, NEOVERSE_N2_CPUECTLR_EL1
- orr x0, x0, NEOVERSE_N2_CPUECTLR_EL1_EXTLLC_BIT
- msr NEOVERSE_N2_CPUECTLR_EL1, x0
+ sysreg_bit_set NEOVERSE_N2_CPUECTLR_EL1, NEOVERSE_N2_CPUECTLR_EL1_EXTLLC_BIT
#endif
-
- isb
- ret
-endfunc neoverse_n2_reset_func
+cpu_reset_func_end neoverse_n2
func neoverse_n2_core_pwr_dwn
- /* ---------------------------------------------
+
+ apply_erratum neoverse_n2, ERRATUM(2009478), ERRATA_N2_2009478
+ apply_erratum neoverse_n2, ERRATUM(2326639), ERRATA_N2_2326639, NO_GET_CPU_REV
+
+ /* ---------------------------------------------------
* Enable CPU power down bit in power control register
* No need to do cache maintenance here.
- * ---------------------------------------------
+ * ---------------------------------------------------
*/
- mrs x0, NEOVERSE_N2_CPUPWRCTLR_EL1
- orr x0, x0, #NEOVERSE_N2_CORE_PWRDN_EN_BIT
- msr NEOVERSE_N2_CPUPWRCTLR_EL1, x0
+ sysreg_bit_set NEOVERSE_N2_CPUPWRCTLR_EL1, NEOVERSE_N2_CORE_PWRDN_EN_BIT
+
+ apply_erratum neoverse_n2, ERRATUM(2743089), ERRATA_N2_2743089
+
isb
ret
endfunc neoverse_n2_core_pwr_dwn
-#if REPORT_ERRATA
-/*
- * Errata printing function for Neoverse N2 cores. Must follow AAPCS.
- */
-func neoverse_n2_errata_report
- /* No errata reported for Neoverse N2 cores */
- ret
-endfunc neoverse_n2_errata_report
-#endif
+errata_report_shim neoverse_n2
/* ---------------------------------------------
* This function provides Neoverse N2 specific