Files
opensbi/include/sbi/sbi_ipi.h
Anup Patel a6395acd6c lib: Handle page/access fault caused by unpriv load/store
The unpriv load/store instruction from M-mode can cause page/access
fault to M-mode if S-mode page table did not have mappings OR it did
not have PMP access permission.

To tackle this, we redirect trap back to S-mode if unpriv load/store
instruction traps in M-mode.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
2019-05-24 08:22:47 +05:30

42 lines
885 B
C

/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2019 Western Digital Corporation or its affiliates.
*
* Authors:
* Anup Patel <anup.patel@wdc.com>
*/
#ifndef __SBI_IPI_H__
#define __SBI_IPI_H__
#include <sbi/riscv_unpriv.h>
#include <sbi/sbi_types.h>
/* clang-format off */
#define SBI_IPI_EVENT_SOFT 0x1
#define SBI_IPI_EVENT_FENCE_I 0x2
#define SBI_IPI_EVENT_SFENCE_VMA 0x4
#define SBI_IPI_EVENT_SFENCE_VMA_ASID 0x8
#define SBI_IPI_EVENT_HALT 0x10
/* clang-format on */
struct sbi_scratch;
struct sbi_ipi_data {
unsigned long ipi_type;
};
int sbi_ipi_send_many(struct sbi_scratch *scratch, struct unpriv_trap *uptrap,
ulong *pmask, u32 event, void *data);
void sbi_ipi_clear_smode(struct sbi_scratch *scratch);
void sbi_ipi_process(struct sbi_scratch *scratch);
int sbi_ipi_init(struct sbi_scratch *scratch, bool cold_boot);
#endif