riscv: Enable interrupts during syscalls with M-Mode

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[ Upstream commit 643437b996 ]

When running is M-Mode (no MMU config), MPIE does not get set. This
results in all syscalls being executed with interrupts disabled as
handle_exception never sets SR_IE as it always sees SR_PIE being
cleared. Fix this by always force enabling interrupts in
handle_syscall when CONFIG_RISCV_M_MODE is enabled.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Damien Le Moal 2020-12-13 22:50:36 +09:00 • committed by Greg Kroah-Hartman

parent 094a4af043

commit 6bc83cce3e

1 changed files with 9 additions and 0 deletions

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arch/riscv/kernel/entry.S

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