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https://github.com/riscv-software-src/opensbi.git
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Anup Patel
48725e95b4
Instead of assuming that hart protection reconfiguration is unconfigure followed by configure, introduce a separate sbi_hart_protection_reconfigure() function and use it in switch_to_next_domain_context(). Signed-off-by: Anup Patel <anup.patel@oss.qualcomm.com> Reviewed-by: Rahul Pathak <rahul.pathak@oss.qualcomm.com> Link: https://lore.kernel.org/r/20260727042504.1743250-3-anup.patel@oss.qualcomm.com Signed-off-by: Anup Patel <anup@brainfault.org>
108 lines
2.9 KiB
C
108 lines
2.9 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2025 Ventana Micro Systems Inc.
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*/
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#ifndef __SBI_HART_PROTECTION_H__
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#define __SBI_HART_PROTECTION_H__
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#include <sbi/sbi_types.h>
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#include <sbi/sbi_list.h>
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struct sbi_scratch;
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/** Representation of hart protection mechanism */
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struct sbi_hart_protection {
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/** List head */
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struct sbi_dlist head;
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/** Name of the hart protection mechanism */
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char name[32];
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/** Ratings of the hart protection mechanism (higher is better) */
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unsigned long rating;
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/** Configure protection for current HART (Mandatory) */
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int (*configure)(struct sbi_scratch *scratch);
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/** Unconfigure protection for current HART (Mandatory) */
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void (*unconfigure)(struct sbi_scratch *scratch);
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/** Create temporary mapping to access address range on current HART (Optional) */
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int (*map_range)(struct sbi_scratch *scratch,
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unsigned long base, unsigned long size);
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/** Destroy temporary mapping on current HART (Optional) */
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int (*unmap_range)(struct sbi_scratch *scratch,
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unsigned long base, unsigned long size);
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};
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/**
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* Get the best hart protection mechanism
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*
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* @return pointer to best hart protection mechanism
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*/
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struct sbi_hart_protection *sbi_hart_protection_best(void);
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/**
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* Register a hart protection mechanism
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*
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* @param hprot pointer to hart protection mechanism
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*
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* @return 0 on success and negative error code on failure
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*/
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int sbi_hart_protection_register(struct sbi_hart_protection *hprot);
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/**
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* Unregister a hart protection mechanism
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*
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* @param hprot pointer to hart protection mechanism
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*/
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void sbi_hart_protection_unregister(struct sbi_hart_protection *hprot);
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/**
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* Configure protection for current HART
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*
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* @param scratch pointer to scratch space of current HART
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*
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* @return 0 on success and negative error code on failure
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*/
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int sbi_hart_protection_configure(struct sbi_scratch *scratch);
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/**
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* Unconfigure protection for current HART
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*
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* @param scratch pointer to scratch space of current HART
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*/
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void sbi_hart_protection_unconfigure(struct sbi_scratch *scratch);
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/**
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* Re-configure protection for current HART
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*
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* @param scratch pointer to scratch space of current HART
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*/
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int sbi_hart_protection_reconfigure(struct sbi_scratch *scratch);
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/**
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* Create temporary mapping to access address range on current HART
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*
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* @param base base address of the temporary mapping
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* @param size size of the temporary mapping
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*
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* @return 0 on success and negative error code on failure
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*/
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int sbi_hart_protection_map_range(unsigned long base, unsigned long size);
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/**
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* Destroy temporary mapping to access address range on current HART
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*
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* @param base base address of the temporary mapping
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* @param size size of the temporary mapping
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*
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* @return 0 on success and negative error code on failure
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*/
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int sbi_hart_protection_unmap_range(unsigned long base, unsigned long size);
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#endif /* __SBI_HART_PROTECTION_H__ */
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