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ac9f4b4da6
The erratum titled “Disabling of data prefetcher with outstanding prefetch TLB miss might cause a deadlock” should not be handled within TF-A. The current workaround attempts to follow option 2 but misapplies it. Specifically, it statically sets PF_MODE to conservative, which is not the recommended approach. According to the erratum documentation, PF_MODE should be configured in conservative mode only when we disable data prefetcher however this is not done in TF-A and thus the workaround is not needed in TF-A. The static setting of PF_MODE in TF-A does not correctly address the erratum and may introduce unnecessary performance degradation on platforms that adopt it without fully understanding its implications. To prevent incorrect or unintended use, the current implementation of this erratum workaround should be removed from TF-A and not adopted by platforms. List of Impacted CPU's with Errata Numbers and reference to SDEN - Cortex-A78 - 2132060 - https://developer.arm.com/documentation/SDEN1401784/latest Cortex-A78C - 2132064 - https://developer.arm.com/documentation/SDEN-2004089/latest Cortex-A710 - 2058056 - https://developer.arm.com/documentation/SDEN-1775101/latest Cortex-X2 - 2058056 - https://developer.arm.com/documentation/SDEN-1775100/latest Cortex-X3 - 2070301 - https://developer.arm.com/documentation/SDEN2055130/latest Neoverse-N2 - 2138953 - https://developer.arm.com/documentation/SDEN-1982442/latest Neoverse-V1 - 2108267 - https://developer.arm.com/documentation/SDEN-1401781/latest Neoverse-V2 - 2331132 - https://developer.arm.com/documentation/SDEN-2332927/latest Change-Id: Icf4048508ae070b2df073cc46c63be058b2779df Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
62 lines
2.7 KiB
C
62 lines
2.7 KiB
C
/*
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* Copyright (c) 2021-2025, Arm Limited. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef CORTEX_X2_H
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#define CORTEX_X2_H
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#define CORTEX_X2_MIDR U(0x410FD480)
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/* Cortex-X2 loop count for CVE-2022-23960 mitigation */
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#define CORTEX_X2_BHB_LOOP_COUNT U(32)
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/*******************************************************************************
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* CPU Extended Control register specific definitions
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******************************************************************************/
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#define CORTEX_X2_CPUECTLR_EL1 S3_0_C15_C1_4
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#define CORTEX_X2_CPUECTLR_EL1_PFSTIDIS_BIT (ULL(1) << 8)
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/*******************************************************************************
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* CPU Auxiliary Control register 3 specific definitions.
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******************************************************************************/
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#define CORTEX_X2_CPUACTLR3_EL1 S3_0_C15_C1_2
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/*******************************************************************************
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* CPU Power Control register specific definitions
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******************************************************************************/
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#define CORTEX_X2_CPUPWRCTLR_EL1 S3_0_C15_C2_7
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#define CORTEX_X2_CPUPWRCTLR_EL1_CORE_PWRDN_BIT U(1)
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/*******************************************************************************
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* CPU Auxiliary Control Register definitions
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******************************************************************************/
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#define CORTEX_X2_CPUACTLR_EL1 S3_0_C15_C1_0
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#define CORTEX_X2_CPUACTLR_EL1_BIT_22 (ULL(1) << 22)
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/*******************************************************************************
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* CPU Auxiliary Control Register 2 definitions
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******************************************************************************/
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#define CORTEX_X2_CPUACTLR2_EL1 S3_0_C15_C1_1
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#define CORTEX_X2_CPUACTLR2_EL1_BIT_40 (ULL(1) << 40)
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/*******************************************************************************
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* CPU Auxiliary Control Register 5 definitions
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******************************************************************************/
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#define CORTEX_X2_CPUACTLR5_EL1 S3_0_C15_C8_0
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#define CORTEX_X2_CPUACTLR5_EL1_BIT_17 (ULL(1) << 17)
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/*******************************************************************************
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* CPU Implementation Specific Selected Instruction registers
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******************************************************************************/
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#define CORTEX_X2_IMP_CPUPSELR_EL3 S3_6_C15_C8_0
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#define CORTEX_X2_IMP_CPUPCR_EL3 S3_6_C15_C8_1
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#define CORTEX_X2_IMP_CPUPOR_EL3 S3_6_C15_C8_2
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#define CORTEX_X2_IMP_CPUPMR_EL3 S3_6_C15_C8_3
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#ifndef __ASSEMBLER__
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long check_erratum_cortex_x2_3701772(long cpu_rev);
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#endif /* __ASSEMBLER__ */
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#endif /* CORTEX_X2_H */
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