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target/nios2: Use gen_io_start around wrctl instruction 

wrctl instruction on nios2 target will cause checking cpu
interrupt but tcg_handle_interrupt() will call cpu_abort()
if the CPU gets an interrupt while it's not in 'can do IO'
state, so add gen_io_start around wrctl instruction. Also
at the same time, end the onging TB with DISAS_UPDATE.

Signed-off-by: Wentong Wu <wentong.wu@intel.com>
Message-id: 20200710233433.19729-3-wentong.wu@intel.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Wentong Wu 2020-07-13 14:36:11 +01:00 committed by Peter Maydell
parent c769453571
commit 77b3f2af57
1 changed files with 5 additions and 0 deletions
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5
target/nios2/translate.c
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@ -32,6 +32,7 @@
#include "exec/cpu_ldst.h"
#include "exec/translator.h"
#include "qemu/qemu-print.h"
#include "exec/gen-icount.h"
/* is_jmp field values */
#define DISAS_JUMP DISAS_TARGET_0 /* only pc was modified dynamically */
@ -518,7 +519,11 @@ static void wrctl(DisasContext *dc, uint32_t code, uint32_t flags)
/* If interrupts were enabled using WRCTL, trigger them. */
#if !defined(CONFIG_USER_ONLY)
if ((instr.imm5 + CR_BASE) == CR_STATUS) {
if (tb_cflags(dc->tb) & CF_USE_ICOUNT) {
gen_io_start();
}
gen_helper_check_interrupts(dc->cpu_env);
dc->is_jmp = DISAS_UPDATE;
}
#endif
}