opensbi.git/lib/sbi/riscv_asm.c, branch master

lib: sbi: Move hart PMP functions to sbi_hart_pmp.c

2026-06-10T12:25:33Z

The sbi_hart_pmp.c looks like a good place for the hart PMP CSR access functions. Signed-off-by: Nicholas Piggin Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20260430045528.420437-9-npiggin@gmail.com Signed-off-by: Anup Patel

lib: sbi: Add hart_ prefix to PMP functions

2026-06-10T12:07:49Z

PMP functions that deal with hart PMP CSRs are given a sbi_hart_ prefix, to distinguish from RISC-V PMP encoding functions. The is_pmp_entry_mapped() function is changed a little more, to align with other PMP conventions, and made to return a bool to make it more obvious that it returns a bool and not an SBI_ return code. Signed-off-by: Nicholas Piggin Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20260430045528.420437-8-npiggin@gmail.com Signed-off-by: Anup Patel

lib: sbi: Add sbi_pmp_is_enabled() helper

2026-06-10T07:55:29Z

Signed-off-by: Nicholas Piggin Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20260430045528.420437-7-npiggin@gmail.com Signed-off-by: Anup Patel

lib: sbi: Add PMP CSR read and write accessors

2026-06-10T07:53:18Z

PMPCFG CSR access is non-trivial as it requires shifting and masking, it makes PMP manipulation code simpler if this basic CSR read/write access is abstracted away. Signed-off-by: Nicholas Piggin Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20260430045528.420437-6-npiggin@gmail.com Signed-off-by: Anup Patel

lib: sbi: Move RISC-V PMP encoding functions to sbi_pmp.c

2026-06-10T07:47:30Z

Create a new file for handling the RISC-V PMP format and the new pmp_t type, as opposed to hart PMP CSR specific access. Signed-off-by: Nicholas Piggin Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20260430045528.420437-4-npiggin@gmail.com Signed-off-by: Anup Patel

lib: sbi: split PMP encoding and CSR access

2026-06-10T04:27:58Z

Allow PMP encoding functions to be shared with non-hart PMP manipulation by splitting encoding / decoding and hart PMP CSR access into their own functions. Signed-off-by: Nicholas Piggin Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20260430045528.420437-3-npiggin@gmail.com Signed-off-by: Anup Patel

lib: sbi: Introduce pmp_t type

2026-06-10T04:26:29Z

To help abstract details of PMP encoding and access, add a new pmp_t type which contains address and cfg in the format of the riscv CSRs. There is no functional change. Signed-off-by: Nicholas Piggin Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20260430045528.420437-2-npiggin@gmail.com Signed-off-by: Anup Patel

lib: Allow custom CSRs in csr_read_num() and csr_write_num()

2025-10-21T14:04:09Z

Some of the platforms use platform specific CSR access functions for configuring implementation specific CSRs (such as PMA registers). Extend the common csr_read_num() and csr_write_num() to allow custom CSRs so that platform specific CSR access functions are not needed. Signed-off-by: Anup Patel Reviewed-by: Andrew Jones Link: https://lore.kernel.org/r/20250930153216.89853-1-apatel@ventanamicro.com Signed-off-by: Anup Patel

lib: sbi: check result of pmp_get() in is_pmp_entry_mapped()

2024-08-02T03:15:10Z

pmp_get() may return an error if the given entry, given by the caller of is_pmp_entry_mapped(), is invalid. This results in the output parameters for pmp_get() being uninitialized. To avoid using garbage values, check the result and return early if necessary. This issue is not being hit because at the moment is_pmp_entry_mapped() is only being called from a single site with a valid hardcoded value. Signed-off-by: Carlos López Reviewed-by: Anup Patel

lib: sbi: Add support for smcntrpmf

2023-08-18T09:20:38Z

This adds the support for ISA extension smcntrpmf. When some inhibit flags are set by a lower privilege mode for new CSRs added by smcntrpmf, OpenSBI sets the appropriate values correspondingly. Signed-off-by: Kaiwen Xue Signed-off-by: Kaiwen Xue Reviewed-by: Anup Patel Reviewed-by: Atish Patra