mirror of
https://github.com/riscv-software-src/opensbi.git
synced 2026-01-09 13:31:24 +00:00
74434f2558
The commit42139bb9b7("lib: sbi: Replace sbi_hart_pmp_xyz() and sbi_hart_map/unmap_addr()") changed logic by calling sbi_hart_protection_configure(). But when protection doesn't exist the function is returning SBI_EINVAL. But on systems without protection this is correct configuration that's why do not hang when system don't have any HART protection. Fixes:42139bb9b7("lib: sbi: Replace sbi_hart_pmp_xyz() and sbi_hart_map/unmap_addr()") Signed-off-by: Michal Simek <michal.simek@amd.com> Reviewed-by: Anup Patel <anup@brainfault.org> Link: https://lore.kernel.org/r/bb8641e5f82654e3989537cea85f165f67a7044e.1767801896.git.michal.simek@amd.com Signed-off-by: Anup Patel <anup@brainfault.org>
93 lines
2.0 KiB
C
93 lines
2.0 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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int sbi_hart_protection_configure(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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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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void sbi_hart_protection_unconfigure(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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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_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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