| Message ID | 20240603160933.1141717-2-peter.maydell@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | cpu_exec_halt: make method mandatory | expand |
On 3/6/24 18:09, Peter Maydell wrote: > In commit a96edb687e76 we set the cpu_exec_halt field of the > TCGCPUOps arm_tcg_ops to arm_cpu_exec_halt(), but we left the > arm_v7m_tcg_ops struct unchanged. That isn't wrong, because for > M-profile FEAT_WFxT doesn't exist and the default handling for "no > cpu_exec_halt method" is correct, but it's perhaps a little > confusing. We would also like to make setting the cpu_exec_halt > method mandatory. > > Initialize arm_v7m_tcg_ops cpu_exec_halt to the same function we use > for A-profile. (On M-profile we never set up the wfxt timer so there > is no change in behaviour here.) > > Signed-off-by: Peter Maydell <peter.maydell@linaro.org> > --- > target/arm/internals.h | 3 +++ > target/arm/cpu.c | 2 +- > target/arm/tcg/cpu-v7m.c | 1 + > 3 files changed, 5 insertions(+), 1 deletion(-) Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
diff --git a/target/arm/internals.h b/target/arm/internals.h index 11b5da2562f..e45ccd983e1 100644 --- a/target/arm/internals.h +++ b/target/arm/internals.h @@ -364,6 +364,9 @@ void arm_restore_state_to_opc(CPUState *cs, #ifdef CONFIG_TCG void arm_cpu_synchronize_from_tb(CPUState *cs, const TranslationBlock *tb); + +/* Our implementation of TCGCPUOps::cpu_exec_halt */ +bool arm_cpu_exec_halt(CPUState *cs); #endif /* CONFIG_TCG */ typedef enum ARMFPRounding { diff --git a/target/arm/cpu.c b/target/arm/cpu.c index 35fa281f1b9..948e904bd8a 100644 --- a/target/arm/cpu.c +++ b/target/arm/cpu.c @@ -1133,7 +1133,7 @@ static bool arm_cpu_virtio_is_big_endian(CPUState *cs) } #ifdef CONFIG_TCG -static bool arm_cpu_exec_halt(CPUState *cs) +bool arm_cpu_exec_halt(CPUState *cs) { bool leave_halt = cpu_has_work(cs); diff --git a/target/arm/tcg/cpu-v7m.c b/target/arm/tcg/cpu-v7m.c index c059c681e94..5496f14dc16 100644 --- a/target/arm/tcg/cpu-v7m.c +++ b/target/arm/tcg/cpu-v7m.c @@ -244,6 +244,7 @@ static const TCGCPUOps arm_v7m_tcg_ops = { #else .tlb_fill = arm_cpu_tlb_fill, .cpu_exec_interrupt = arm_v7m_cpu_exec_interrupt, + .cpu_exec_halt = arm_cpu_exec_halt, .do_interrupt = arm_v7m_cpu_do_interrupt, .do_transaction_failed = arm_cpu_do_transaction_failed, .do_unaligned_access = arm_cpu_do_unaligned_access,
In commit a96edb687e76 we set the cpu_exec_halt field of the TCGCPUOps arm_tcg_ops to arm_cpu_exec_halt(), but we left the arm_v7m_tcg_ops struct unchanged. That isn't wrong, because for M-profile FEAT_WFxT doesn't exist and the default handling for "no cpu_exec_halt method" is correct, but it's perhaps a little confusing. We would also like to make setting the cpu_exec_halt method mandatory. Initialize arm_v7m_tcg_ops cpu_exec_halt to the same function we use for A-profile. (On M-profile we never set up the wfxt timer so there is no change in behaviour here.) Signed-off-by: Peter Maydell <peter.maydell@linaro.org> --- target/arm/internals.h | 3 +++ target/arm/cpu.c | 2 +- target/arm/tcg/cpu-v7m.c | 1 + 3 files changed, 5 insertions(+), 1 deletion(-)