diff options
| author | Vincent Chen <vincent.chen@sifive.com> | 2021-03-22 22:26:05 +0800 |
|---|---|---|
| committer | Palmer Dabbelt <palmerdabbelt@google.com> | 2021-04-26 08:24:57 -0700 |
| commit | 800149a77c2cb8746a94457939b1ba1e37d2c14e (patch) | |
| tree | a31cd1e131fc9259b2d7a12b62fe5958587b420b /arch/riscv/Kconfig.erratas | |
| parent | 1a0e5dbd3723e1194cc549def69fe7b557d4c72b (diff) | |
riscv: sifive: Apply errata "cip-453" patch
Add sign extension to the $badaddr before addressing the instruction page
fault and instruction access fault to workaround the issue "cip-453".
To avoid affecting the existing code sequence, this patch will creates two
trampolines to add sign extension to the $badaddr. By the "alternative"
mechanism, these two trampolines will replace the original exception
handler of instruction page fault and instruction access fault in the
excp_vect_table. In this case, only the specific SiFive CPU core jumps to
the do_page_fault and do_trap_insn_fault through these two trampolines.
Other CPUs are not affected.
Signed-off-by: Vincent Chen <vincent.chen@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'arch/riscv/Kconfig.erratas')
| -rw-r--r-- | arch/riscv/Kconfig.erratas | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/riscv/Kconfig.erratas b/arch/riscv/Kconfig.erratas index 302e7467f302..b4146dca50fc 100644 --- a/arch/riscv/Kconfig.erratas +++ b/arch/riscv/Kconfig.erratas @@ -19,4 +19,15 @@ config ERRATA_SIFIVE Otherwise, please say "N" here to avoid unnecessary overhead. +config ERRATA_SIFIVE_CIP_453 + bool "Apply SiFive errata CIP-453" + depends on ERRATA_SIFIVE + default y + help + This will apply the SiFive CIP-453 errata to add sign extension + to the $badaddr when exception type is instruction page fault + and instruction access fault. + + If you don't know what to do here, say "Y". + endmenu |