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Re: [Qemu-devel] [PATCH target-arm v3 8/8] target-arm: Call pmccntr_sync
From: |
Peter Maydell |
Subject: |
Re: [Qemu-devel] [PATCH target-arm v3 8/8] target-arm: Call pmccntr_sync() when swapping ELs |
Date: |
Mon, 18 Aug 2014 09:32:42 +0100 |
On 18 August 2014 09:16, Peter Crosthwaite <address@hidden> wrote:
> Call the pmccntr_sync() when the EL changes. All Runtime changes
> of EL are done as a pstate_write so we can catch these EL-change side
> effects here.
Hmm. This probably clashes badly with Alex's cleanup of how we
handle pstate writes... I'm not sure I really want more side
effects in pstate_write(), either; the ones we have in cpsr_write()
are pretty annoying (makes migration load awkward).
> Signed-off-by: Peter Crosthwaite <address@hidden>
> ---
>
> target-arm/cpu.h | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
>
> diff --git a/target-arm/cpu.h b/target-arm/cpu.h
> index 5bc2afe..2533fc0 100644
> --- a/target-arm/cpu.h
> +++ b/target-arm/cpu.h
> @@ -503,12 +503,24 @@ static inline uint32_t pstate_read(CPUARMState *env)
>
> static inline void pstate_write(CPUARMState *env, uint32_t val)
> {
> +#ifndef CONFIG_USER_ONLY
> + bool pmccntr_need_sync = (env->pstate ^ val) & PSTATE_M;
> +
> + if (pmccntr_need_sync) {
> + pmccntr_sync(env);
> + }
> +#endif
> env->ZF = (~val) & PSTATE_Z;
> env->NF = val;
> env->CF = (val >> 29) & 1;
> env->VF = (val << 3) & 0x80000000;
> env->daif = val & PSTATE_DAIF;
> env->pstate = val & ~CACHED_PSTATE_BITS;
> +#ifndef CONFIG_USER_ONLY
> + if (pmccntr_need_sync) {
> + pmccntr_sync(env);
> + }
> +#endif
> }
>
> /* Return the current CPSR value. */
> --
> 2.0.1.1.gfbfc394
thanks
-- PMM
- [Qemu-devel] [PATCH target-arm v3 0/8] target-arm: Extend PMCCNTR for ARMv8, Peter Crosthwaite, 2014/08/18
- [Qemu-devel] [PATCH target-arm v3 1/8] target-arm: Make the ARM PMCCNTR register 64-bit, Peter Crosthwaite, 2014/08/18
- [Qemu-devel] [PATCH target-arm v3 2/8] arm: Implement PMCCNTR 32b read-modify-write, Peter Crosthwaite, 2014/08/18
- [Qemu-devel] [PATCH target-arm v3 3/8] target-arm: Implement PMCCNTR_EL0 and related registers, Peter Crosthwaite, 2014/08/18
- [Qemu-devel] [PATCH target-arm v3 4/8] target-arm: Add arm_ccnt_enabled function, Peter Crosthwaite, 2014/08/18
- [Qemu-devel] [PATCH target-arm v3 5/8] target-arm: Implement pmccntr_sync function, Peter Crosthwaite, 2014/08/18
- [Qemu-devel] [PATCH target-arm v3 6/8] target-arm: Remove old code and replace with new functions, Peter Crosthwaite, 2014/08/18
- [Qemu-devel] [PATCH target-arm v3 7/8] target-arm: Implement pmccfiltr_write function, Peter Crosthwaite, 2014/08/18
- [Qemu-devel] [PATCH target-arm v3 8/8] target-arm: Call pmccntr_sync() when swapping ELs, Peter Crosthwaite, 2014/08/18
- Re: [Qemu-devel] [PATCH target-arm v3 8/8] target-arm: Call pmccntr_sync() when swapping ELs,
Peter Maydell <=