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target/arm: Only set ZEN in reset if SVE present 

There's no reason to set CPACR_EL1.ZEN if SVE disabled.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220708151540.18136-44-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2022-07-08 20:45:38 +05:30 committed by Peter Maydell
parent 24d87c187c
commit 4630353559
1 changed files with 3 additions and 4 deletions
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7
target/arm/cpu.c
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@ -204,11 +204,10 @@ static void arm_cpu_reset(DeviceState *dev)
/* and to the FP/Neon instructions */ /* and to the FP/Neon instructions */
env->cp15.cpacr_el1 = FIELD_DP64(env->cp15.cpacr_el1, env->cp15.cpacr_el1 = FIELD_DP64(env->cp15.cpacr_el1,
CPACR_EL1, FPEN, 3); CPACR_EL1, FPEN, 3);
/* and to the SVE instructions */ /* and to the SVE instructions, with default vector length */
env->cp15.cpacr_el1 = FIELD_DP64(env->cp15.cpacr_el1,
CPACR_EL1, ZEN, 3);
/* with reasonable vector length */
if (cpu_isar_feature(aa64_sve, cpu)) { if (cpu_isar_feature(aa64_sve, cpu)) {
env->cp15.cpacr_el1 = FIELD_DP64(env->cp15.cpacr_el1,
CPACR_EL1, ZEN, 3);
env->vfp.zcr_el[1] = cpu->sve_default_vq - 1; env->vfp.zcr_el[1] = cpu->sve_default_vq - 1;
} }
/* /*