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| author | Andy Chiu <andy.chiu@sifive.com> | 2023-06-25 17:54:15 +0200 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-07-01 16:38:20 +0200 |
| commit | 26c38cd802c947401cfbcc285b7d841256b5f17f (patch) | |
| tree | e3a94ae97aeb13645ec11edce28b36e45453e831 /arch/riscv | |
| parent | Merge patch series "riscv: enable HAVE_LD_DEAD_CODE_DATA_ELIMINATION" (diff) | |
| download | linux-26c38cd802c947401cfbcc285b7d841256b5f17f.tar.xz linux-26c38cd802c947401cfbcc285b7d841256b5f17f.zip | |
riscv: vector: only enable interrupts in the first-use trap
The function irqentry_exit_to_user_mode() must be called with interrupt
disabled. The caller of do_trap_insn_illegal() also assumes running
without interrupts. So, we should turn off interrupts after
riscv_v_first_use_handler() returns.
Fixes: cd054837243b ("riscv: Allocate user's vector context in the first-use trap")
Signed-off-by: Andy Chiu <andy.chiu@sifive.com>
Reviewed-by: Björn Töpel <bjorn@rivosinc.com>
Link: https://lore.kernel.org/r/20230625155416.18629-1-andy.chiu@sifive.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv')
| -rw-r--r-- | arch/riscv/kernel/traps.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/riscv/kernel/traps.c b/arch/riscv/kernel/traps.c index 5158961ea977..bc02b282a403 100644 --- a/arch/riscv/kernel/traps.c +++ b/arch/riscv/kernel/traps.c @@ -150,12 +150,18 @@ DO_ERROR_INFO(do_trap_insn_fault, asmlinkage __visible __trap_section void do_trap_insn_illegal(struct pt_regs *regs) { + bool handled; + if (user_mode(regs)) { irqentry_enter_from_user_mode(regs); local_irq_enable(); - if (!riscv_v_first_use_handler(regs)) + handled = riscv_v_first_use_handler(regs); + + local_irq_disable(); + + if (!handled) do_trap_error(regs, SIGILL, ILL_ILLOPC, regs->epc, "Oops - illegal instruction"); |