arch: riscv: Use CONFIG_PMP_SLOTS for M-mode stack guard arrays #97077
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The arrays `m_mode_pmpaddr_regs` and `m_mode_pmpcfg_regs` within the `_thread_arch` struct, used for the M-mode stack guard (when CONFIG_PMP_STACK_GUARD is enabled), were previously sized using the hardcoded PMP_M_MODE_SLOTS macro (defined as 8). This commit changes the array sizing to use the Kconfig option CONFIG_PMP_SLOTS. This option reflects the total number of Physical Memory Protection (PMP) slots available and configured for the target hardware. Using CONFIG_PMP_SLOTS ensures these arrays are dimensioned according to the system's actual capabilities, providing better flexibility and correctness over a fixed size. Signed-off-by: Firas Sammoura <[email protected]>
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area: RISCV
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dcpleung,
edersondisouza,
fkokosinski,
katsuster,
kgugala,
masz-nordic,
mgielda,
nashif,
npitre,
tgorochowik,
VynDragon and
ycsin
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dcpleung
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Oct 6, 2025
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The arrays
m_mode_pmpaddr_regsandm_mode_pmpcfg_regswithin the_thread_archstruct, used for the M-mode stack guard (when CONFIG_PMP_STACK_GUARD is enabled), were previously sized using the hardcoded PMP_M_MODE_SLOTS macro (defined as 8).This commit changes the array sizing to use the Kconfig option CONFIG_PMP_SLOTS. This option reflects the total number of Physical Memory Protection (PMP) slots available and configured for the target hardware.
Using CONFIG_PMP_SLOTS ensures these arrays are dimensioned according to the system's actual capabilities, providing better flexibility and correctness over a fixed size.