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target/arm: Pass in current_el to fp and sve_exception_el
We are going to want to determine whether sve is enabled for EL other than current. Backports commit 2de7ace292cf7846b0cda0e940272d2cb0e06859 from qemu
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@ -3831,12 +3831,10 @@ static const ARMCPRegInfo debug_lpae_cp_reginfo[] = {
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* take care of raising that exception.
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* C.f. the ARM pseudocode function CheckSVEEnabled.
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*/
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static int sve_exception_el(CPUARMState *env)
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static int sve_exception_el(CPUARMState *env, int el)
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{
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#ifndef CONFIG_USER_ONLY
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unsigned current_el = arm_current_el(env);
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if (current_el <= 1) {
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if (el <= 1) {
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bool disabled = false;
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/* The CPACR.ZEN controls traps to EL1:
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@ -3847,7 +3845,7 @@ static int sve_exception_el(CPUARMState *env)
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if (!extract32(env->cp15.cpacr_el1, 16, 1)) {
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disabled = true;
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} else if (!extract32(env->cp15.cpacr_el1, 17, 1)) {
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disabled = current_el == 0;
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disabled = el == 0;
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}
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if (disabled) {
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/* route_to_el2 */
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@ -3860,7 +3858,7 @@ static int sve_exception_el(CPUARMState *env)
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if (!extract32(env->cp15.cpacr_el1, 20, 1)) {
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disabled = true;
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} else if (!extract32(env->cp15.cpacr_el1, 21, 1)) {
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disabled = current_el == 0;
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disabled = el == 0;
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}
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if (disabled) {
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return 0;
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@ -3870,7 +3868,7 @@ static int sve_exception_el(CPUARMState *env)
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/* CPTR_EL2. Since TZ and TFP are positive,
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* they will be zero when EL2 is not present.
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*/
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if (current_el <= 2 && !arm_is_secure_below_el3(env)) {
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if (el <= 2 && !arm_is_secure_below_el3(env)) {
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if (env->cp15.cptr_el[2] & CPTR_TZ) {
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return 2;
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}
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@ -11742,11 +11740,10 @@ uint32_t HELPER(crc32c)(uint32_t acc, uint32_t val, uint32_t bytes)
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/* Return the exception level to which FP-disabled exceptions should
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* be taken, or 0 if FP is enabled.
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*/
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static inline int fp_exception_el(CPUARMState *env)
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static int fp_exception_el(CPUARMState *env, int cur_el)
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{
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#ifndef CONFIG_USER_ONLY
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int fpen;
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int cur_el = arm_current_el(env);
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/* CPACR and the CPTR registers don't exist before v6, so FP is
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* always accessible
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@ -11809,7 +11806,8 @@ void cpu_get_tb_cpu_state(CPUARMState *env, target_ulong *pc,
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target_ulong *cs_base, uint32_t *pflags)
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{
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ARMMMUIdx mmu_idx = core_to_arm_mmu_idx(env, cpu_mmu_index(env, false));
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int fp_el = fp_exception_el(env);
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int current_el = arm_current_el(env);
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int fp_el = fp_exception_el(env, current_el);
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uint32_t flags;
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if (is_a64(env)) {
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@ -11820,7 +11818,7 @@ void cpu_get_tb_cpu_state(CPUARMState *env, target_ulong *pc,
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flags |= (arm_regime_tbi1(env, mmu_idx) << ARM_TBFLAG_TBI1_SHIFT);
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if (arm_feature(env, ARM_FEATURE_SVE)) {
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int sve_el = sve_exception_el(env);
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int sve_el = sve_exception_el(env, current_el);
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uint32_t zcr_len;
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/* If SVE is disabled, but FP is enabled,
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@ -11829,7 +11827,6 @@ void cpu_get_tb_cpu_state(CPUARMState *env, target_ulong *pc,
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if (sve_el != 0 && fp_el == 0) {
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zcr_len = 0;
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} else {
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int current_el = arm_current_el(env);
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ARMCPU *cpu = arm_env_get_cpu(env);
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zcr_len = cpu->sve_max_vq - 1;
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