mirror of
https://github.com/riscv-software-src/opensbi.git
synced 2026-08-18 01:21:49 +01:00
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>
109 lines
2.4 KiB
C
109 lines
2.4 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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#include <sbi/sbi_error.h>
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#include <sbi/sbi_hart_protection.h>
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#include <sbi/sbi_scratch.h>
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static SBI_LIST_HEAD(hart_protection_list);
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struct sbi_hart_protection *sbi_hart_protection_best(void)
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{
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if (sbi_list_empty(&hart_protection_list))
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return NULL;
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return sbi_list_first_entry(&hart_protection_list, struct sbi_hart_protection, head);
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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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struct sbi_hart_protection *pos = NULL;
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bool found_pos = false;
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if (!hprot)
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return SBI_EINVAL;
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sbi_list_for_each_entry(pos, &hart_protection_list, head) {
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if (hprot->rating > pos->rating) {
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found_pos = true;
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break;
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}
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}
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if (found_pos)
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sbi_list_add_tail(&hprot->head, &pos->head);
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else
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sbi_list_add_tail(&hprot->head, &hart_protection_list);
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return 0;
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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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if (!hprot)
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return;
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sbi_list_del(&hprot->head);
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}
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static int __hart_protection_configure(struct sbi_scratch *scratch,
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struct sbi_hart_protection *hprot)
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{
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if (!hprot)
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return 0;
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if (!hprot->configure)
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return SBI_ENOSYS;
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return hprot->configure(scratch);
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}
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static void __hart_protection_unconfigure(struct sbi_scratch *scratch,
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struct sbi_hart_protection *hprot)
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{
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if (!hprot || !hprot->unconfigure)
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return;
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hprot->unconfigure(scratch);
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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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return __hart_protection_configure(scratch, sbi_hart_protection_best());
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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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__hart_protection_unconfigure(scratch, sbi_hart_protection_best());
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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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struct sbi_hart_protection *hprot = sbi_hart_protection_best();
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__hart_protection_unconfigure(scratch, hprot);
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return __hart_protection_configure(scratch, hprot);
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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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struct sbi_hart_protection *hprot = sbi_hart_protection_best();
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if (!hprot || !hprot->map_range)
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return 0;
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return hprot->map_range(sbi_scratch_thishart_ptr(), base, size);
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}
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int sbi_hart_protection_unmap_range(unsigned long base, unsigned long size)
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{
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struct sbi_hart_protection *hprot = sbi_hart_protection_best();
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if (!hprot || !hprot->unmap_range)
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return 0;
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return hprot->unmap_range(sbi_scratch_thishart_ptr(), base, size);
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}
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