diff options
| author | Richard Henderson <richard.henderson@linaro.org> | 2018-08-16 14:05:28 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2018-08-16 14:05:28 +0100 |
| commit | adf92eab90e3f5f34c285da6d14d48952b7a8e72 (patch) | |
| tree | b7001056fc891aab12aa36908a884de7e3555543 /target/arm/helper.c | |
| parent | 2bf5f3f91bb4e3faa2a19aec042138a938afbf6a (diff) | |
target/arm: Add sve-max-vq cpu property to -cpu max
This allows the default (and maximum) vector length to be set
from the command-line. Which is extraordinarily helpful in
debugging problems depending on vector length without having to
bake knowledge of PR_SET_SVE_VL into every guest binary.
Cc: qemu-stable@nongnu.org (3.0.1)
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target/arm/helper.c')
| -rw-r--r-- | target/arm/helper.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/target/arm/helper.c b/target/arm/helper.c index 8b07bf214e..873a0c215d 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -12437,9 +12437,12 @@ void cpu_get_tb_cpu_state(CPUARMState *env, target_ulong *pc, zcr_len = 0; } else { int current_el = arm_current_el(env); + ARMCPU *cpu = arm_env_get_cpu(env); - zcr_len = env->vfp.zcr_el[current_el <= 1 ? 1 : current_el]; - zcr_len &= 0xf; + zcr_len = cpu->sve_max_vq - 1; + if (current_el <= 1) { + zcr_len = MIN(zcr_len, 0xf & (uint32_t)env->vfp.zcr_el[1]); + } if (current_el < 2 && arm_feature(env, ARM_FEATURE_EL2)) { zcr_len = MIN(zcr_len, 0xf & (uint32_t)env->vfp.zcr_el[2]); } |