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Re: [Qemu-devel] [PATCH 02/11] target-arm: Make arm_current_el() return
From: |
Greg Bellows |
Subject: |
Re: [Qemu-devel] [PATCH 02/11] target-arm: Make arm_current_el() return sensible values for M profile |
Date: |
Fri, 23 Jan 2015 15:38:34 -0600 |
On Fri, Jan 23, 2015 at 12:20 PM, Peter Maydell
<address@hidden> wrote:
> Although M profile doesn't have the same concept of exception level
> as A profile, it does have a notion of privileged versus not, which
> we currently track in the privmode TB flag. Support returning this
> information if arm_current_el() is called on an M profile core, so
> that we can identify the correct MMU index to use (and put the MMU
> index in the TB flags) without having to special-case M profile.
>
> Signed-off-by: Peter Maydell <address@hidden>
> ---
> target-arm/cpu.h | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/target-arm/cpu.h b/target-arm/cpu.h
> index cd7a9e8..3eb00f4 100644
> --- a/target-arm/cpu.h
> +++ b/target-arm/cpu.h
> @@ -1211,6 +1211,10 @@ static inline bool cptype_valid(int cptype)
> */
> static inline int arm_current_el(CPUARMState *env)
> {
> + if (arm_feature(env, ARM_FEATURE_M)) {
> + return !((env->v7m.exception == 0) && (env->v7m.control & 1));
> + }
> +
> if (is_a64(env)) {
> return extract32(env->pstate, 2, 2);
> }
> --
> 1.9.1
>
Reviewed-by: Greg Bellows <address@hidden>
- Re: [Qemu-devel] [PATCH 05/11] target-arm: Use correct mmu_idx for unprivileged loads and stores, (continued)
[Qemu-devel] [PATCH 04/11] target-arm: Define correct mmu_idx values and pass them in TB flags, Peter Maydell, 2015/01/23
[Qemu-devel] [PATCH 11/11] target-arm: Fix brace style in reindented code, Peter Maydell, 2015/01/23
[Qemu-devel] [PATCH 02/11] target-arm: Make arm_current_el() return sensible values for M profile, Peter Maydell, 2015/01/23
- Re: [Qemu-devel] [PATCH 02/11] target-arm: Make arm_current_el() return sensible values for M profile,
Greg Bellows <=
[Qemu-devel] [PATCH 03/11] target-arm/translate-a64: Fix wrong mmu_idx usage for LDT/STT, Peter Maydell, 2015/01/23
[Qemu-devel] [PATCH 06/11] target-arm: Don't define any MMU_MODE*_SUFFIXes, Peter Maydell, 2015/01/23