*/
{ K(3, 0, 1, 2, 0), K(3, 4, 1, 2, 0), K(3, 5, 1, 2, 0),
"ZCR_EL1", "ZCR_EL2", "ZCR_EL12", isar_feature_aa64_sve },
+ { K(3, 0, 1, 2, 6), K(3, 4, 1, 2, 6), K(3, 5, 1, 2, 6),
+ "SMCR_EL1", "SMCR_EL2", "SMCR_EL12", isar_feature_aa64_sme },
{ K(3, 0, 5, 6, 0), K(3, 4, 5, 6, 0), K(3, 5, 5, 6, 0),
"TFSR_EL1", "TFSR_EL2", "TFSR_EL12", isar_feature_aa64_mte },
env->svcr = value;
}
+static void smcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
+ uint64_t value)
+{
+ int cur_el = arm_current_el(env);
+ int old_len = sve_vqm1_for_el(env, cur_el);
+ int new_len;
+
+ QEMU_BUILD_BUG_ON(ARM_MAX_VQ > R_SMCR_LEN_MASK + 1);
+ value &= R_SMCR_LEN_MASK | R_SMCR_FA64_MASK;
+ raw_write(env, ri, value);
+
+ /*
+ * Note that it is CONSTRAINED UNPREDICTABLE what happens to ZA storage
+ * when SVL is widened (old values kept, or zeros). Choose to keep the
+ * current values for simplicity. But for QEMU internals, we must still
+ * apply the narrower SVL to the Zregs and Pregs -- see the comment
+ * above aarch64_sve_narrow_vq.
+ */
+ new_len = sve_vqm1_for_el(env, cur_el);
+ if (new_len < old_len) {
+ aarch64_sve_narrow_vq(env, new_len + 1);
+ }
+}
+
static const ARMCPRegInfo sme_reginfo[] = {
{ .name = "TPIDR2_EL0", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 3, .crn = 13, .crm = 0, .opc2 = 5,
.access = PL0_RW, .type = ARM_CP_SME,
.fieldoffset = offsetof(CPUARMState, svcr),
.writefn = svcr_write, .raw_writefn = raw_write },
+ { .name = "SMCR_EL1", .state = ARM_CP_STATE_AA64,
+ .opc0 = 3, .opc1 = 0, .crn = 1, .crm = 2, .opc2 = 6,
+ .access = PL1_RW, .type = ARM_CP_SME,
+ .fieldoffset = offsetof(CPUARMState, vfp.smcr_el[1]),
+ .writefn = smcr_write, .raw_writefn = raw_write },
+ { .name = "SMCR_EL2", .state = ARM_CP_STATE_AA64,
+ .opc0 = 3, .opc1 = 4, .crn = 1, .crm = 2, .opc2 = 6,
+ .access = PL2_RW, .type = ARM_CP_SME,
+ .fieldoffset = offsetof(CPUARMState, vfp.smcr_el[2]),
+ .writefn = smcr_write, .raw_writefn = raw_write },
+ { .name = "SMCR_EL3", .state = ARM_CP_STATE_AA64,
+ .opc0 = 3, .opc1 = 6, .crn = 1, .crm = 2, .opc2 = 6,
+ .access = PL3_RW, .type = ARM_CP_SME,
+ .fieldoffset = offsetof(CPUARMState, vfp.smcr_el[3]),
+ .writefn = smcr_write, .raw_writefn = raw_write },
};
#endif /* TARGET_AARCH64 */